Nuclear facility ventilation system compliance evaluation method and test system

Abstract

The invention relates to a nuclear facility ventilation system compliance evaluation method and a test system. The method comprises the following steps: acquiring a plane layout diagram of a nuclear facility ventilation system; determining the reasonability of the nuclear facility ventilation system design based on the plane layout diagram; under the condition that the reasonability is reasonable, a plurality of ventilation indexes of the nuclear facility ventilation system are obtained, and standard reference range tables corresponding to different ventilation indexes are obtained; based on the plurality of ventilation indexes and standard reference range tables corresponding to different ventilation indexes, determining ventilation compliance estimated values corresponding to the plurality of ventilation indexes; and determining the compliance of the nuclear facility ventilation system based on the ventilation compliance estimated value. According to the method, the technical problem that the finally obtained compliance evaluation report is inaccurate due to the fact that the compliance evaluation method is not completely and reasonably stipulated and the reasonability of the ventilation system design is not considered preferentially is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear facility ventilation detection, and in particular to a compliance assessment method and a testing system for a nuclear facility ventilation system. Background Art

[0002] In nuclear facilities, ventilation systems are an important part of the production process. In addition to providing an acceptable working environment, they also have important functions such as dynamic containment and closure, air filtration and purification, etc. They are used to protect the environment and operators from the hazards of radioactive dust, radioactive aerosols and radioactive gases in the air. They are the most effective way to prevent the spread of radioactive airborne pollutants to the environment. Therefore, the ventilation system of nuclear facilities is of great significance in protecting the health of occupational personnel, maintaining the normal operation of equipment, and ensuring production safety.

[0003] However, due to the complexity of the ventilation system, there are many problems in the design, processing and installation, commissioning, and operation of nuclear facility ventilation systems. For example, due to the construction period requirements and technical complexity, hydraulic balance calculations were not performed during the design phase of the ventilation system. The setting of ventilation components such as elbows, tees, and reducers in some ventilation systems did not conform to the basic principles of ventilation science, resulting in excessive resistance in the entire ventilation system and the air volume at the vents not meeting the design requirements. Professional technicians were not sent to supervise the processing and installation phase, resulting in the vents being blocked by process equipment and the ventilation components being connected in reverse. Under the above circumstances, the concentration of hazardous factors in the workplace may exceed the standard and the environmental conditions in the workplace may be poor, which seriously threatens the health of occupational personnel and production safety.

[0004] The inspection and evaluation of the ventilation system of a nuclear facility is usually organized by the design institute or the construction unit, which then issues a ventilation commissioning report. However, the existing inspection methods fail to give priority to the rationality of the design of the ventilation system of the nuclear facility, resulting in inaccurate compliance when the ventilation compliance of the ventilation system is inspected, which leads to inaccurate ventilation compliance reports.

[0005] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0006] The invention discloses a compliance assessment method and a testing system for a nuclear facility ventilation system, aiming to solve the technical problems existing in the prior art.

[0007] The present invention adopts the following technical solutions:

[0008] On the one hand, the present invention provides a compliance assessment method for a nuclear facility ventilation system, which includes: obtaining a plan layout diagram of the nuclear facility ventilation system; determining the rationality of the design of the nuclear facility ventilation system based on the plan layout diagram; when the rationality is reasonable, obtaining multiple ventilation indicators of the nuclear facility ventilation system and obtaining a standard reference range table corresponding to different ventilation indicators; based on the multiple ventilation indicators and the standard reference range table corresponding to different ventilation indicators, determining ventilation compliance estimates corresponding to the multiple ventilation indicators; based on the ventilation compliance estimates, determining the compliance of the nuclear facility ventilation system.

[0009] Optionally, determining the rationality of the design of the nuclear facility ventilation system based on the plan layout diagram includes: determining basic data of the nuclear facility ventilation system based on the plan layout diagram, wherein the basic data include duct shape, duct size, exhaust hood position, vent position and control element connection relationship; determining duct resistance based on the duct shape and the duct size; determining ventilation direction and ventilation speed based on the exhaust hood position and the vent position; determining control function based on the control element connection relationship; determining the rationality of the design of the nuclear facility ventilation system based on the duct resistance, the ventilation direction, ventilation speed and control function.

[0010] Optionally, the method further includes: when the rationality is unreasonable, determining the basic data corresponding to the unreasonableness; and adjusting the design of the nuclear facility ventilation system until the rationality is reasonable based on the basic data.

[0011] Optionally, the method of determining the ventilation compliance estimates corresponding to the multiple ventilation indicators based on the multiple ventilation indicators and the standard reference range table corresponding to different ventilation indicators includes: determining the multiple ventilation indicators, wherein the multiple ventilation indicators include at least: exhaust hood air volume, air duct air volume, airflow organization method, controlled wind speed, interference state of comprehensive ventilation on local ventilation, number of ventilation times of sealed chamber, air tightness and pressure of sealed chamber; determining the ventilation levels corresponding to the multiple ventilation indicators in the standard reference range table corresponding to the different ventilation indicators, wherein a plurality of first ventilation levels correspond one-to-one to the multiple ventilation indicators; and obtaining the ventilation compliance estimate based on the multiple ventilation levels using a weighting method.

[0012] Optionally, the method for determining the exhaust hood air volume at time T includes: determining the exhaust hood air volume Q1 at time T:

[0013]

[0014] Among them, Q0 is the exhaust hood air volume at time T-T1, P S0is the static pressure value of the exhaust volume at time T-T1, ρ0 is the gas density at time T-T1, P S1 is the static pressure value of the exhaust volume at time T, and ρ1 is the gas density at time T.

[0015] Optionally, the method for determining the controlled wind speed includes: determining a wind speed detection point, wherein, when the exhaust hood is in a stationary state, the wind speed detection point is determined to be the center position of the exhaust hood; when the exhaust hood is in an operating state, the wind speed detection point is determined to be the center position of the farthest part of the hood opening control surface of the exhaust hood; repeatedly detecting the wind speed multiple times at the wind speed detection point based on an anemometer probe to obtain multiple first wind speeds; and averaging the multiple first wind speeds to obtain the controlled wind speed.

[0016] Optionally, a method for determining the ventilation frequency of the sealed chamber includes: obtaining the position and number of exhaust hoods; determining the exhaust hood air volumes corresponding to the multiple exhaust hoods based on the exhaust hood position and the number of exhaust hoods; determining the total exhaust air volume based on the exhaust hood air volumes corresponding to the multiple exhaust hoods; obtaining the effective volume of the sealed chamber; and determining the ventilation frequency of the sealed chamber based on the total exhaust air volume and the effective volume.

[0017] Optionally, the ventilation compliance valuation is obtained by adopting a weighting method based on multiple ventilation levels, including: performing standard normalization processing on the multiple ventilation levels to obtain multiple standard values, wherein the multiple standard values ​​correspond one-to-one to the multiple ventilation levels; determining weight ratios corresponding to the multiple ventilation indicators, wherein the multiple weight ratios correspond one-to-one to the multiple ventilation indicators; determining the multiple standard values ​​corresponding one-to-one to the multiple ventilation indicators and multiplying the multiple weight ratios to obtain multiple indicator valuations; and adding the multiple indicator valuations to determine the ventilation compliance valuation.

[0018] According to another aspect of an embodiment of the present invention, a compliance assessment test system for a nuclear facility ventilation system is also provided, including: an acquisition module for acquiring a plan layout diagram of a nuclear facility ventilation system; a rationality determination module for determining the rationality of the design of the nuclear facility ventilation system based on the plan layout diagram; a ventilation index module for acquiring multiple ventilation indexes of the nuclear facility ventilation system and obtaining a standard reference range table corresponding to different ventilation indexes when the rationality is reasonable; an estimation determination module for determining ventilation compliance estimations corresponding to the multiple ventilation indexes based on the multiple ventilation indexes and the standard reference range table corresponding to different ventilation indexes; and a compliance determination module for determining the compliance of the nuclear facility ventilation system based on the ventilation compliance estimations.

[0019] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided, wherein the non-volatile storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executing any one of the methods for evaluating compliance of a nuclear facility ventilation system.

[0020] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0021] The present invention mainly provides a compliance assessment method for a nuclear facility ventilation system, including obtaining a plan layout diagram of a nuclear facility ventilation system; determining the rationality of the design of the nuclear facility ventilation system based on the plan layout diagram; obtaining multiple ventilation indicators of the nuclear facility ventilation system and obtaining a standard reference range table corresponding to different ventilation indicators when the rationality is reasonable; determining ventilation compliance estimates corresponding to the multiple ventilation indicators based on the multiple ventilation indicators and the standard reference range table corresponding to different ventilation indicators; and determining the compliance of the nuclear facility ventilation system based on the ventilation compliance estimates. The purpose of giving priority to whether the ventilation system design is reasonable and then conducting a ventilation compliance inspection is achieved, thereby achieving the technical effect of giving priority to the rationality of the ventilation system design and making the final compliance result more accurate, thereby solving the technical problem that the rationality of the ventilation system design is not given priority due to the lack of complete and reasonable regulations for the compliance assessment method, and thus resulting in an inaccurate compliance assessment report. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0023] Figure 1 is a flow chart of a method for evaluating compliance of a nuclear facility ventilation system in Example 1 of the present invention;

[0024] Figure 2 It is a device connection diagram of the method for measuring wind speed in the air duct connected to the exhaust hood in Example 1 of the present invention;

[0025] Figure 3 This is a diagram of the position selection of the circular air duct measuring point in the method for measuring the wind speed in the air duct connected to the exhaust hood in Example 1 of the present invention.

[0026] Figure 4 This is a diagram of the position selection of the rectangular duct measuring point in the method for measuring the wind speed in the duct connected to the exhaust hood in Example 1 of the present invention.

[0027] Figure 5is a flow chart of an optional nuclear facility ventilation system compliance assessment method in Example 2 of the present invention;

[0028] Figure 6 It is a structural schematic diagram of a compliance assessment test system for a nuclear facility ventilation system in Example 3 of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0030] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the industrial field, cold commissioning of nuclear facility ventilation systems is a critical stage, usually carried out after the equipment is installed and before it is officially put into production. The main purpose of this stage is to test the functionality and operability of the equipment and system without any load or actual materials. Therefore, during the cold commissioning stage, scientifically conducting ventilation system testing and evaluation, timely correction, timely improvement and optimization of the ventilation system, and eliminating problems in the bud are important measures to ensure the safe and effective operation of the ventilation system.

[0032] Ventilation system testing and evaluation is a complex and important task involving multiple technical indicators. The current standards such as "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering" (GB 50243-2016), "Design Regulations for Ventilation and Air Purification of Nuclear Fuel Reprocessing Plants" (EJ / T 938-1995), and "Technical Specifications for Controlled Wind Speed ​​Detection and Evaluation of Local Exhaust Facilities" (WST 757-2016) only clarify the detection methods of individual indicators or put forward general evaluation requirements. Testing and evaluation work needs to consider multiple factors and is highly professional. It is urgent to formulate a special ventilation system testing and evaluation guide to clarify the technical system for testing and evaluating various indicators of nuclear facility ventilation systems, so as to guide the implementation of this work in a scientific and standardized manner.

[0033] The current methods such as "Code for Acceptance of Construction Quality of Ventilation and Air-conditioning Engineering" (GB / T 50243-2016) and "Technical Specification for Testing and Evaluation of Wind Speed ​​Control of Local Exhaust Facilities" (WST 757-2016) only clarify the testing methods of individual indicators or put forward general evaluation requirements.

[0034] First, to facilitate understanding of the embodiments of the present invention, some terms or nouns involved in the present invention are explained below:

[0035] The ventilation system of nuclear facilities is an important part of the production process in nuclear facilities. While providing an acceptable working environment, it also undertakes important functions such as dynamic containment and closure, air filtration and purification. This system is used to protect the environment and operators from the hazards of radioactive dust, radioactive aerosols and radioactive gases contained in the air, and is an effective way to prevent the spread of radioactive airborne pollutants into the environment.

[0036] In order to solve the problems existing in the prior art, the embodiments of the present application provide a compliance assessment method and a testing system for a nuclear facility ventilation system.

[0037] Example 1

[0038] This embodiment provides a method for evaluating the compliance of a nuclear facility ventilation system. Figure 1 As shown, Figure 1 1 is a flow chart of a method for evaluating compliance of a nuclear facility ventilation system in Example 1 of the present invention, comprising the following steps:

[0039] Step S102, obtaining a plan layout diagram of a nuclear facility ventilation system;

[0040] Optionally, a floor plan is a drawing used to show the layout and configuration of the internal space of a specific area or facility. In the design of the ventilation system of a nuclear facility, the floor plan plays a vital role. It can help designers, engineers and operators clearly understand the key information such as the spatial distribution of the ventilation system, equipment configuration and airflow path. On the floor plan, various equipment of the ventilation system will be marked in detail, such as the shape of the air duct, the size of the air duct, the position of the exhaust hood, the position of the vent, and the connection relationship of the control components. The configuration and layout of these equipment need to meet the design requirements of the ventilation system and ensure the smoothness of the airflow and the purification effect. At the same time, the floor plan will also show the airflow path of the ventilation system, including the supply air path and the exhaust air path. These paths need to be reasonably designed to ensure that the air can be evenly distributed to various areas and effectively remove radioactive substances and pollutants in the room.

[0041] Step S104, determining the rationality of the design of the nuclear facility ventilation system based on the plan layout diagram;

[0042] In some preferred embodiments, the rationality of the design of the nuclear facility ventilation system is determined based on the floor plan, including: determining basic data of the nuclear facility ventilation system based on the floor plan, wherein the basic data includes duct shape, duct size, exhaust hood position, vent position and control element connection relationship; determining duct resistance based on duct shape and duct size; determining ventilation direction and ventilation speed based on exhaust hood position and vent position; determining control function based on control element connection relationship; determining the rationality of the design of the nuclear facility ventilation system based on duct resistance, ventilation direction, ventilation speed and control function.

[0043] Optionally, to judge the rationality of the ventilation system design, you first need to determine and analyze the duct layout based on the floor plan. Specifically, determine the duct shape and duct size: Check whether the duct shape and duct size meet the design requirements. Wider ducts can usually accommodate more air flow, while curved ducts may increase resistance. At the same time, you also need to pay attention to the design of the duct connection points and branches to ensure that they do not affect the smooth flow of air. In the case that the duct resistance exceeds the preset resistance value, the ventilation system design is deemed unreasonable.

[0044] In addition, to judge the rationality of the ventilation system design, it is also necessary to check the ventilation direction and ventilation speed according to the floor plan. Specifically, determine the location and specifications of the exhaust hood; confirm whether the location of the exhaust hood on the drawing is clearly marked, and whether the connection method with the air duct is clear. At the same time, pay attention to the diameter, speed, power and other parameters of the exhaust hood to ensure that they can meet the power requirements of the ventilation system. It is also necessary to check the shape (such as round, square, rectangular, etc.), size and adjustable angle range of the vents to ensure that the design of the vents can meet the requirements of ventilation direction and ventilation speed. If the ventilation direction and ventilation speed at the vents cannot meet the ventilation requirements, the ventilation system design is deemed unreasonable.

[0045] Optionally, to judge the rationality of the ventilation system design, it is also necessary to evaluate the control function of the control system based on the floor plan. Specifically, it is necessary to check the control components and connections, understand the connection relationship between each control component (such as switches, sensors) and the exhaust hood and vents, and ensure that the automatic adjustment function of the control system can be realized normally. If the control system cannot control some components, the ventilation system design is deemed unreasonable.

[0046] Step S106, when the rationality is reasonable, obtaining multiple ventilation indicators of the nuclear facility ventilation system and obtaining a standard reference range table corresponding to different ventilation indicators;

[0047] In some preferred embodiments, when the rationality is unreasonable, basic data corresponding to the unreasonableness is determined; and the design of the nuclear facility ventilation system is adjusted based on the basic data until the rationality is reasonable.

[0048] Optionally, if the rationality is reasonable, it means that the ventilation system design can be implemented and subsequent work can be carried out directly. If the rationality is unreasonable, it means that there are problems with the ventilation system design and rectification is required, otherwise the subsequent compliance inspection may fail. Specifically, based on the duct resistance, ventilation direction, ventilation speed and control function, when the duct resistance exceeds the preset resistance, it is necessary to adjust the shape and size of the duct, or adjust the direction of the curved duct to reduce the duct resistance.

[0049] Step S108, determining ventilation compliance estimates corresponding to the plurality of ventilation indicators based on the plurality of ventilation indicators and a standard reference range table corresponding to different ventilation indicators;

[0050] In some preferred embodiments, based on multiple ventilation indicators and a standard reference range table corresponding to different ventilation indicators, ventilation compliance estimates corresponding to multiple ventilation indicators are determined, including: determining multiple ventilation indicators, wherein the multiple ventilation indicators include at least: exhaust hood air volume, air duct air volume, airflow organization method, controlled wind speed, interference state of comprehensive ventilation on local ventilation, number of ventilation times of sealed chambers, air tightness and pressure of sealed chambers; determining ventilation levels corresponding to multiple ventilation indicators in the standard reference range table corresponding to different ventilation indicators, wherein multiple first ventilation levels correspond one-to-one to multiple ventilation indicators; based on multiple ventilation levels, a weighting method is used to obtain a ventilation compliance estimate.

[0051] Optionally, the size of the exhaust hood air volume and the air duct air volume directly affects the rationality of the wind flow organization mode; the setting of the control wind speed needs to take into account the influence of the air duct air volume and the wind flow organization mode; the interference between full ventilation and local ventilation also needs to be evaluated and optimized through testing. The common goal of these testing contents is to ensure the efficiency and effectiveness of the ventilation system, improve indoor air quality, and protect the health and safety of personnel. By testing and optimizing these parameters, it can be effectively ensured that the ventilation system can effectively remove harmful substances and provide a comfortable working environment.

[0052] In some preferred embodiments, the method for determining the exhaust hood air volume at time T includes: determining the exhaust hood air volume Q1 at time T:

[0053]

[0054] Among them, Q0 is the exhaust hood air volume at time T-T1, P S0 is the static pressure value of the exhaust volume at time T-T1, ρ0 is the gas density at time T-T1, PS1 is the static pressure value of the exhaust volume at time T, and ρ1 is the gas density at time T.

[0055] There are three optional methods for measuring the exhaust hood air volume. Specifically, the first is the hood opening wind speed measurement method, the second is the exhaust hood connecting to the average wind speed measurement method in the air duct, and the third is the static pressure estimation method. For an exhaust hood with a certain shape and unchanged position of the static pressure measurement point, after measuring the static pressure value of the exhaust hood in the connected air duct, the previously measured static pressure value (static pressure value of the exhaust volume at time T-T1) and the corresponding exhaust volume (exhaust hood air volume at time T-T1) can be used to estimate the current exhaust volume of the exhaust hood (exhaust hood air volume Q1 at time T) according to the method for determining the exhaust hood air volume at time T.

[0056] Optionally, in addition, the exhaust hood is connected to the wind speed measurement method in the air duct using a standard pitot tube and an inclined micromanometer for measurement. The connection method of the standard pitot tube and the inclined micromanometer should be the same as Figure 2 Same as shown ( Figure 2 The figure is a device connection diagram of the method for measuring the wind speed in the air duct connected to the exhaust hood in Example 1 of the present invention. The dynamic pressure value of each point is measured one by one according to the above measuring point position. At least three measurements are performed to obtain three sets of dynamic pressure values. The cross-sectional wind speed in the air duct is the average of the wind speeds obtained from at least three sets of dynamic pressure values. According to the method of GB / T6719, the gas flow rate in the connected air duct is calculated, which is the exhaust volume of the exhaust hood.

[0057] Optionally, the method of measuring the wind speed in the exhaust hood-connected air duct can be applied to the detection of circular air ducts and rectangular air ducts, wherein the two are exactly the same in the measurement method, but the selection of the measurement point location is slightly different.

[0058] Specifically, the method for selecting the location of the measuring point in the circular air duct is as follows: on the straight pipe section connected to the exhaust hood, select a point that is greater than or equal to 6D (D is the diameter of the air duct) away from the pipe mouth and greater than 3D away from interference sources such as elbows and reducers in the downstream direction as the measuring section. Open measuring holes at 90° or 60° to each other on this section, connect short pipes to the orifices, and install wire plugs. If conditions are limited and the above requirements cannot be met, a section with stable airflow should be selected as much as possible, and the number of measuring points and the measurement frequency should be appropriately increased during the measurement. The logarithmic linear rule is used to determine the location of the measuring points on the circular section. Taking the arrangement of 10 points on the diameter of the section as an example, the location of the measuring points is as follows: Figure 3 As shown ( Figure 3: This is a diagram of the position selection of measuring points in a circular air duct in the method for measuring the wind speed in the air duct connected to the exhaust hood in Example 1 of the present invention. There are 20 measuring points on two mutually perpendicular diameters. According to the different measurement accuracy, 4, 6, 8, and 10 measuring points are selected for measurement respectively. The more measuring points there are, the more accurate the measurement result is. If you want to obtain more accurate measurement results, you can use the method of selecting points on the diameters that are 60° angles to each other on the measurement section. For air ducts of different diameters, the distance between the measuring point and the inner wall of the air duct can be calculated based on the data in Table 1 below. Table 1 is as follows:

[0059] Table 1

[0060]

[0061] Optionally, the exhaust volume and static pressure of the exhaust hood should be checked regularly during the operation of the ventilation system. The allowable deviation between the exhaust volume of the exhaust hood and the corresponding reference value should not be greater than 10%, or the deviation between the static pressure of the exhaust hood and the corresponding reference value should not be greater than 20%. During the initial measurement, if the air duct connected to the exhaust hood is short and cannot meet the section selection requirements of Method 2, the hood opening wind speed measurement method should be used to obtain the exhaust hood control wind speed, hood opening wind speed and exhaust volume and other parameters, and use them as the reference value. The average wind speed at the hood opening should not be lower than the minimum wind speed value specified in EJ / T 938-1995 and other regulations. The hood opening wind speed measurement method should be implemented in accordance with the provisions of GB / T16758.

[0062] Specifically, the measurement point location selection method for the rectangular duct is as follows: the measurement point location on the rectangular duct section is determined by using the logarithmic linear rule. Taking a 5×6 measurement point array as an example, the measurement point distribution on the section is as follows: Figure 4 As shown ( Figure 4 1 is a diagram for selecting measuring point positions in a rectangular duct in the method for measuring wind speed in an air duct connected to an exhaust hood in Example 1 of the present invention). In the figure, L and W represent the length and width of the rectangular duct section, respectively. According to the size of the duct, the number of points in the transverse and longitudinal directions of the duct section is determined. However, the number of measuring points on the cross section should not be less than 25, and the distance between any two measuring points should not be greater than 150 mm. The position of the measuring point on the measuring section can be determined by calculation based on the data in Table 2, wherein Table 2 is the content related to the number of measuring points on the measuring section and the length and width multiples of the pipe wall. Specifically, Table 2 is as follows:

[0063] Table 2

[0064]

[0065] In some preferred embodiments, the method for determining the controlled wind speed includes: determining a wind speed detection point, wherein, when the exhaust hood is in a stationary state, the wind speed detection point is determined to be the center position of the exhaust hood; when the exhaust hood is in an operating state, the wind speed detection point is determined to be the center position of the farthest part of the hood opening control surface of the exhaust hood; repeatedly detecting the wind speed multiple times at the wind speed detection point based on the anemometer probe to obtain multiple first wind speeds; and averaging the multiple first wind speeds to obtain the controlled wind speed.

[0066] Optionally, first determine the wind speed detection point. Different exhaust hoods have different ways of determining the detection point, including the case where the control surface of the exhaust hood is a closed hood opening or a slit section and the case where the control surface of the exhaust hood is an opening surface for actual operation of the exhaust cabinet. Specifically, when the control surface of the exhaust hood is a closed hood opening or a slit section, the detection point is determined at the position of the closed hood opening. When the control surface of the exhaust hood is an opening surface for actual operation of the exhaust cabinet, the control point should be located on the control surface. The number of control points is related to the hood opening area, which is ≤0.3m 2 , take 6 measuring points for measurement; the hood opening area is > 0.3m 2 , take 9 to 12 measuring points for measurement, each small area is less than 0.06m 2 .

[0067] Optionally, determine the wind speed detection point, and conduct the detection after the ventilation system is operating normally and stable. When detecting the exhaust hood control wind speed, its rotating body should be in a stationary state; when the exhaust hood rotating body and the equipment cannot be stopped, the wind speed at the farthest point of the hood control surface of the receiving exhaust hood can be detected when the rotating body is running; avoid artificial airflow interference during detection. Place the anemometer probe at the detection point, with the direction indicator on the anemometer facing the wind direction; the wind speed after the anemometer value stabilizes is the wind speed of the measurement point; the wind speed of each detection point is measured at least 3 times, and the arithmetic mean is taken as the average wind speed of the detection point; the control wind speed detection result of the control point should be the average wind speed value of each detection point.

[0068] In some preferred embodiments, a method for determining the ventilation frequency of a sealed chamber includes: obtaining the position of exhaust hoods and the number of exhaust hoods; determining the exhaust hood air volumes corresponding to the multiple exhaust hoods based on the position of the exhaust hoods and the number of exhaust hoods; determining the total exhaust air volume based on the exhaust hood air volumes corresponding to the multiple exhaust hoods; obtaining the effective volume of the sealed chamber; and determining the ventilation frequency of the sealed chamber based on the total exhaust air volume and the effective volume.

[0069] Optionally, determine the position and number of exhaust hoods, measure the air volume of each exhaust hood according to the hood opening wind speed measurement method, and calculate the total exhaust air volume. Specifically, the total exhaust air volume is calculated as follows:

[0070]

[0071] Among them, L 总 is the total exhaust air volume in cubic meters per hour (m 3 / h); L i is the air volume of each exhaust hood, in cubic meters per hour (m 3 / h).

[0072] When the exhaust hood is used with an inclined airflow (such as an axial flow fan), install an exhaust hood with a length of 0.5 to 1m (the cross-sectional dimensions of the exhaust hood are the same as those of the air outlet), and measure the air volume at the hood outlet according to the method for measuring the wind speed at the hood outlet. The air volume of the duct is measured according to the method for measuring the wind speed and air volume in the duct.

[0073] Optionally, obtain the effective volume of the sealed chamber (Vy, in cubic meters (m 3 The specific method is: measure the volume of the sealed chamber (V) in cubic meters (m 3 ): V = length of sealed box room × width of sealed box room × height of sealed box room; measure the volume of equipment and facilities in the sealed box room (Vs), the unit is cubic meter (m 3 ): Vs = length of indoor equipment and facilities × width of indoor equipment and facilities × height of indoor equipment and facilities; effective volume: Vy = V-Vs.

[0074] Optionally, the air change rate of the sealed chamber is calculated as follows:

[0075]

[0076] Where n is the ventilation frequency, in times per hour (times / h); L 总 is the total exhaust air volume in cubic meters per hour (m 3 / h); Vy is the effective volume of the sealed chamber, in cubic meters (m3).

[0077] In some preferred embodiments, a weighting method is used based on multiple ventilation levels to obtain a ventilation compliance valuation, including: performing standard normalization processing on multiple ventilation levels to obtain multiple standard values, wherein the multiple standard values ​​correspond one-to-one to the multiple ventilation levels; determining weight ratios corresponding to multiple ventilation indicators, wherein the multiple weight ratios correspond one-to-one to the multiple ventilation indicators; determining multiple standard values ​​corresponding one-to-one to the multiple ventilation indicators and multiplying the multiple weight ratios to obtain multiple indicator valuations; adding the multiple indicator valuations to determine the ventilation compliance valuation.

[0078] Step S110, determining the compliance of the nuclear facility ventilation system based on the ventilation compliance estimation.

[0079] Optionally, when the ventilation compliance valuation is greater than or equal to the preset compliance valuation, the nuclear facility ventilation system is determined to be in compliance with regulations and can be put into normal use. However, if the ventilation compliance valuation is less than the preset compliance valuation, this indicates that the nuclear facility ventilation system does not comply with regulations and needs to be rectified. However, since the ventilation system design rationality test has been carried out in accordance with the above steps, this indicates that the problem should be caused by the switching or power of various equipment or components in the ventilation system. There is no need to rework the ventilation system design, which effectively saves labor and time costs.

[0080] Through the above steps S102 to S110, the purpose of giving priority to whether the ventilation system design is reasonable and then conducting a ventilation compliance inspection is achieved, thereby achieving the technical effect of giving priority to the rationality of the ventilation system design and making the final compliance result more accurate, thereby solving the technical problem that the rationality of the ventilation system design is not given priority due to the lack of complete and reasonable regulations on the compliance assessment method, which leads to an inaccurate compliance assessment report.

[0081] Example 2

[0082] Based on the above embodiments and optional embodiments, the present invention proposes an optional implementation mode: Figure 5 is a flow chart of an optional nuclear facility ventilation system compliance assessment method in Example 2 of the present invention, such as Figure 5 As shown, the method includes:

[0083] Step S1, assessment preparation:

[0084] First, determine the evaluation object: determine the evaluation object based on the construction content. During the determination process, it is necessary to pay attention to clarifying the boundaries and process nodes of the evaluation object.

[0085] Secondly, the evaluation materials include but are not limited to the following: 1) design drawings of ventilation systems, floor plans, process equipment arrangements, etc.; 2) ventilation system equipment parameters; technical engineering conditions; 3) the party being evaluated shall be responsible for the authenticity, accuracy and completeness of the evaluation materials provided.

[0086] Step S2, analyzing the design drawings:

[0087] First, the design drawings of the ventilation system of the construction project are analyzed one by one, mainly analyzing the air volume distribution and ventilation layout of each place.

[0088] Secondly, when there are unreasonable features in the design, the evaluator requires the party being evaluated to organize the design institute to re-evaluate and form a re-evaluation report.

[0089] Step S3, implementation of ventilation system design:

[0090] First, verify the implementation status of the drawings and form a summary report on the implementation status.

[0091] The implementation summary report includes the following contents: Implementation of the basic parameters of ventilation system design / settings in branch factories, workshops, and workplaces (comprehensive ventilation system design, local ventilation design, ventilation duct system design, airflow organization design, duct material, fan air volume, exhaust hood type, etc.).

[0092] Secondly, if the design is not implemented during construction and installation, on-site parameter measurements should be carried out to evaluate the necessity of continued implementation and produce an evaluation report.

[0093] Step S4, ventilation system rationality assessment during cold commissioning phase:

[0094] First, determine the evaluation indicators and conduct ventilation: 1) Local ventilation, wind flow organization mode, wind speed control, sealed chamber air volume (air change frequency), chamber air tightness test. 2) Comprehensive ventilation, wind flow organization mode, air volume (air change frequency), and the interference of comprehensive ventilation on local ventilation.

[0095] Secondly, 1) measure and determine the air volume of the exhaust hood; 2) measure and determine the air volume of the duct. Specifically, the wind speed in the ventilation duct should not be lower than the minimum wind speed value specified in GB50019, etc. At the measurement position of the ventilation duct, use a pitot tube and a pressure gauge to regularly measure the static pressure value of the airflow and keep records. If the ventilation system has an automatic measurement device, the system should have an automatic recording function. 3) measure and determine the wind flow organization mode. Specifically, the wind flow organization form should avoid short circuit of the supply and exhaust air outlets, and the wind flow organization form should meet the provisions of GB50019, etc. 4) measure and determine the control wind speed. Specifically, the determination of the control wind speed should meet WST 757-2016. 5) the interference of comprehensive ventilation on local ventilation. Specifically, close the local ventilation system, open the comprehensive ventilation system, use a direct reading anemometer such as a thermoelectric anemometer to measure the wind speed around the exhaust hood. The wind speed of comprehensive ventilation that interferes with local ventilation should be less than 0.3m / s. 6) Measurement and determination of the ventilation frequency of the sealed chamber. Specifically, the T / CECS 704-2020 tracer gas method is used to measure the ventilation frequency of the sealed chamber. The air volume (ventilation frequency) of the sealed chamber should meet the requirements of standards such as EJ / T 938-1995. 7) Testing and determination of the air tightness and pressure of the sealed chamber. Specifically, the air tightness and pressure of the sealed chamber are tested according to the method of EJ / T1096-1999. The air tightness and pressure of the sealed chamber should meet the requirements of standards such as EJ / T938-1995.

[0096] Step S5, preparation of evaluation report.

[0097] Example 3

[0098] In this embodiment, a nuclear facility ventilation system compliance assessment test system is also provided. Figure 6 is a schematic diagram of the structure of a compliance assessment test system for a nuclear facility ventilation system in Example 3 of the present invention, such as Figure 6 As shown, the compliance assessment and testing system for the ventilation system of a nuclear facility includes: an acquisition module 301, a rationality determination module 302, a ventilation index module 303, an estimation determination module 304 and a compliance determination module 305, wherein:

[0099] An acquisition module 301 is used to acquire a plan layout diagram of a nuclear facility ventilation system;

[0100] A rationality determination module 302, connected to the acquisition module 301, is used to determine the rationality of the design of the nuclear facility ventilation system based on the plan layout diagram;

[0101] The ventilation index module 303 is connected to the rationality determination module 302 and is used to obtain multiple ventilation indexes of the nuclear facility ventilation system and obtain a standard reference range table corresponding to different ventilation indexes when the rationality is reasonable;

[0102] The estimation determination module 304 is connected to the ventilation index module 303 and is used to determine the ventilation compliance estimation corresponding to the multiple ventilation indicators based on the multiple ventilation indicators and the standard reference range table corresponding to the different ventilation indicators;

[0103] The compliance determination module 305 is connected to the estimation determination module 304 and is used to determine the compliance of the nuclear facility ventilation system based on the ventilation compliance estimation.

[0104] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0105] It should be noted that the acquisition module 301, rationality determination module 302, ventilation index module 303, valuation determination module 304 and compliance determination module 305 correspond to steps S102 to S110 in the embodiment, and the examples and application scenarios implemented by the modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the modules as part of the device can be run in a computer terminal.

[0106] It should be noted that the optional or preferred implementation of this embodiment can refer to the relevant description in the embodiment, which will not be repeated here.

[0107] The working device of the above-mentioned liquid scintillation spectrometer may also include a processor and a memory. The above-mentioned acquisition module 301, rationality determination module 302, ventilation index module 303, valuation determination module 304 and compliance determination module 305 are all stored in the memory as program modules, and the processor executes the above-mentioned program modules stored in the memory to realize corresponding functions.

[0108] The processor includes a kernel, which retrieves the corresponding program module from the memory. The kernel may be one or more. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory includes at least one memory chip.

[0109] According to an embodiment of the present application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the non-volatile storage medium includes a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any of the above-mentioned nuclear facility ventilation system compliance assessment methods and test systems.

[0110] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the non-volatile storage medium includes a stored program.

[0111] Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following functions: obtain a floor plan of the nuclear facility ventilation system; based on the floor plan, determine the rationality of the design of the nuclear facility ventilation system; when the rationality is reasonable, obtain multiple ventilation indicators of the nuclear facility ventilation system and obtain a standard reference range table corresponding to different ventilation indicators; based on the multiple ventilation indicators and the standard reference range table corresponding to the different ventilation indicators, determine the ventilation compliance valuations corresponding to the multiple ventilation indicators; based on the ventilation compliance valuations, determine the compliance of the nuclear facility ventilation system.

[0112] According to an embodiment of the present application, an embodiment of a processor is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein when the program is run, any one of the above-mentioned nuclear facility ventilation system compliance assessment methods and test systems is executed.

[0113] According to an embodiment of the present application, an embodiment of a computer program product is also provided. Optionally, in this embodiment, the computer program product includes a computer program, and when the computer program is executed by a processor, the computer program implements any of the above-mentioned nuclear facility ventilation system compliance assessment methods and test system steps.

[0114] Optionally, the above-mentioned computer program product, when executed on a data processing device, is suitable for executing a program that initializes the following method steps: obtaining a floor plan of a nuclear facility ventilation system; determining the rationality of the design of the nuclear facility ventilation system based on the floor plan; when the rationality is reasonable, obtaining multiple ventilation indicators of the nuclear facility ventilation system and obtaining a standard reference range table corresponding to different ventilation indicators; determining ventilation compliance estimates corresponding to multiple ventilation indicators based on the multiple ventilation indicators and the standard reference range table corresponding to different ventilation indicators; and determining the compliance of the nuclear facility ventilation system based on the ventilation compliance estimates.

[0115] An embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps are implemented: obtaining a floor plan of a nuclear facility ventilation system; determining the rationality of the design of the nuclear facility ventilation system based on the floor plan; when the rationality is reasonable, obtaining multiple ventilation indicators of the nuclear facility ventilation system and obtaining a standard reference range table corresponding to different ventilation indicators; determining ventilation compliance estimates corresponding to multiple ventilation indicators based on the multiple ventilation indicators and the standard reference range table corresponding to different ventilation indicators; and determining the compliance of the nuclear facility ventilation system based on the ventilation compliance estimates.

[0116] The above sequence of the embodiments of the present invention is for description only and does not represent the superiority or inferiority of the embodiments.

[0117] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0118] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the above modules can be a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0119] The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0120] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0121] If the above-mentioned integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a non-volatile storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned non-volatile storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0122] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for evaluating compliance of a nuclear facility ventilation system, characterized in that: include: Obtain floor plan layout of nuclear facility ventilation systems; Determine the rationality of the design of the ventilation system of the nuclear facility based on the floor plan; In the case where the rationality is reasonable, obtaining a plurality of ventilation indicators of the nuclear facility ventilation system and obtaining a standard reference range table corresponding to different ventilation indicators; Determining ventilation compliance estimates corresponding to the multiple ventilation indicators based on the multiple ventilation indicators and a standard reference range table corresponding to different ventilation indicators; Based on the ventilation compliance estimate, compliance of the nuclear facility ventilation system is determined.

2. The method according to claim 1, characterized in that Determining the rationality of the design of the nuclear facility ventilation system based on the floor plan includes: Based on the plan layout diagram, determining basic data of the nuclear facility ventilation system, wherein the basic data includes air duct shape, air duct size, exhaust hood position, vent position, and control element connection relationship; Determining the air duct resistance based on the air duct shape and the air duct size; Determining ventilation direction and ventilation speed based on the exhaust hood position and the vent position; Determining a control function based on the connection relationship of the control elements; Based on the wind duct resistance, the ventilation direction, ventilation speed and control function, the rationality of the design of the nuclear facility ventilation system is determined.

3. The method according to claim 2, characterized in that The method further comprises: In the case where the rationality is unreasonable, determining the basic data corresponding to the unreasonableness; It is reasonable to adjust the nuclear facility ventilation system design to the rationality based on the basic data.

4. The method according to claim 1, characterized in that: The determining, based on the multiple ventilation indicators and the standard reference range table corresponding to different ventilation indicators, ventilation compliance estimates corresponding to the multiple ventilation indicators includes: Determine the plurality of ventilation indicators, wherein the plurality of ventilation indicators at least include: exhaust hood air volume, air duct air volume, wind flow organization mode, controlled wind speed, interference state of comprehensive ventilation on local ventilation, number of air changes in sealed chambers, air tightness and pressure of sealed chambers; Determine ventilation levels corresponding to the plurality of ventilation indicators in a standard reference range table corresponding to the different ventilation indicators, wherein the plurality of first ventilation levels correspond one-to-one to the plurality of ventilation indicators; Based on multiple ventilation levels, a weighting method is used to obtain the ventilation compliance estimate.

5. The method according to claim 4, characterized in that The method for determining the air volume of the exhaust hood at time T comprises: Determine the exhaust hood air volume Q1 at time T: Among them, Q0 is the exhaust hood air volume at time T-T1, P S0 is the static pressure value of the exhaust volume at time T-T1, ρ0 is the gas density at time T-T1, P S1 is the static pressure value of the exhaust volume at time T, and ρ1 is the gas density at time T.

6. The method according to claim 4, characterized in that The method for determining the wind speed control comprises: Determine a wind speed detection point, wherein when the exhaust hood is in a stationary state, the wind speed detection point is determined to be the center position of the exhaust hood; when the exhaust hood is in a running state, the wind speed detection point is determined to be the center position at the farthest point of the hood opening control surface of the exhaust hood; Based on the anemometer probe, the wind speed is repeatedly detected multiple times at the wind speed detection point to obtain multiple first wind speeds; The control wind speed is obtained by averaging the multiple first wind speeds.

7. The method according to claim 4, characterized in that The method for determining the ventilation frequency of the sealed chamber comprises: Get the location and quantity of exhaust hoods; Determining the exhaust hood air volumes corresponding to the exhaust hoods respectively based on the exhaust hood positions and the number of exhaust hoods; Determining a total exhaust air volume based on the exhaust hood air volumes respectively corresponding to the plurality of exhaust hoods; Obtain the effective volume of the sealed chamber; Based on the total exhaust air volume and the effective volume, the ventilation frequency of the sealed chamber is determined.

8. The method according to claims 4 to 7, characterized in that The ventilation compliance estimation is obtained by adopting a weighting method based on multiple ventilation levels, including: Performing standard normalization processing on the multiple ventilation levels respectively to obtain multiple standard values, wherein the multiple standard values ​​correspond to the multiple ventilation levels one by one; Determine the weight proportions corresponding to the multiple ventilation indicators respectively, wherein the multiple weight proportions correspond to the multiple ventilation indicators one by one; Determine the plurality of standard values ​​corresponding to the plurality of ventilation indices one by one and multiply the plurality of weight proportions to obtain a plurality of index estimates; The plurality of indicator estimates are summed to determine the ventilation compliance estimate.

9. A nuclear facility ventilation system compliance assessment test system, characterized in that: include: An acquisition module, used to acquire a plan layout of a nuclear facility ventilation system; A rationality determination module, used to determine the rationality of the design of the nuclear facility ventilation system based on the plan layout diagram; A ventilation index module, used for obtaining a plurality of ventilation indexes of the ventilation system of the nuclear facility and obtaining a standard reference range table corresponding to different ventilation indexes when the rationality is reasonable; An estimation determination module, configured to determine ventilation compliance estimation values ​​corresponding to the plurality of ventilation indicators based on the plurality of ventilation indicators and a standard reference range table corresponding to different ventilation indicators; A compliance determination module is used to determine the compliance of the nuclear facility ventilation system based on the ventilation compliance estimation.

10. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executed by a nuclear facility ventilation system compliance assessment method as described in any one of claims 1 to 8.

Images