Nuclear power station reactor building and harmful gas detection device thereof

Abstract

The utility model discloses a harmful gas detection device which comprises a harmful gas detector arranged outside a containment vessel of a reactor nuclear island, and a gas inlet of the harmful gas detector is communicated with an inner cavity of the containment vessel of the reactor nuclear island through a gas inlet pipe. And an exhaust port of the harmful gas detector is communicated with an inner cavity of the reactor nuclear island containment through a return pipe. The harmful gas detection device can accurately detect the content of harmful gas in the gas environment in the plant without personnel entering the reactor plant of the nuclear power plant, so that the health hazard of the working condition environment in the plant to detection personnel is effectively avoided, the corresponding detection operation safety is improved, and the detection efficiency is improved. And the corresponding detection efficiency is greatly improved. The utility model also discloses a nuclear power station reactor building applying the harmful gas detection device.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for nuclear power plant reactor buildings, and particularly relates to a harmful gas detection device. The utility model also relates to a nuclear power plant reactor building applying the harmful gas detection device. Background Technique

[0002] During the current power operation of nuclear power plants, the nuclear island building is in a closed state. Due to the material properties and working conditions of rotating equipment grease, thermal insulation materials, paints, etc. inside the building, harmful gases such as carbon monoxide and formaldehyde will be continuously released.

[0003] During the normal operation of nuclear power units, there is no need for personnel to enter or exit the reactor building, and the staff does not need to enter the building for operation. Therefore, the harmful gas environment inside the building has no impact on the safe and stable operation of the unit and the health of personnel. However, when the nuclear power unit inside the building needs staff to enter the reactor building for corresponding operation and treatment due to refueling overhaul or defect handling, harmful gases such as formaldehyde and carbon monoxide existing in the building will cause certain adverse effects on the physical health of the staff. In this case, it is necessary to first detect the content of harmful gases such as formaldehyde and carbon monoxide in the internal gas environment of the nuclear island building to determine whether the current gas environment inside the reactor building meets the safety operation standards for staff and to determine whether the reactor building currently meets the conditions for staff to enter.

[0004] At present, for the detection of the internal gas environment of the above-mentioned nuclear power plant reactor building, the conventional measurement method commonly used in this field is that staff enter the reactor building with portable measuring instruments in hand to directly measure the internal gas environment of the reactor building, and then determine whether the current internal gas environment of the reactor building meets the conditions for staff to enter the building for continuous operation for a long time according to the measurement results. However, although this detection operation method can obtain the state of the internal gas environment of the reactor building, during the measurement process, the measurement operator needs to directly enter the building. If the content of harmful gases in the internal gas environment of the building is higher than the set value of safe operation, this measurement process itself will inevitably cause adverse effects of the harmful gases inside the building on the measurement personnel. In addition, this operation method of entering the building with a measuring instrument in hand by the operator will increase the radiation dose of the operator inside the building and increase the risk of injury to the operator. Moreover, its measurement process completely relies on manual operation, with low operation and measurement efficiency, causing many inconveniences to the maintenance and supporting operations of relevant nuclear power plant reactor building facilities.

[0005] In view of this, how to optimize the internal gas environment detection method of the nuclear power plant reactor building and improve the corresponding detection efficiency and operation safety are important technical problems that need to be solved by those skilled in the art at present. Summary of the Invention

[0006] The purpose of the present invention is to provide a harmful gas detection device. This harmful gas detection device can accurately detect the content of harmful gases in the internal gas environment of the building without personnel entering the inside of the nuclear power plant reactor building, effectively avoiding the health hazards of the internal working conditions of the building to the detection personnel, improving the corresponding detection operation safety, and greatly improving the corresponding detection efficiency. Another purpose of the present invention is to provide a nuclear power plant reactor building applying the above-mentioned harmful gas detection device.

[0007] To solve the above technical problems, the present invention provides a harmful gas detection device, including a harmful gas detector arranged outside the reactor nuclear island containment. The air inlet of the harmful gas detector is connected to the inner cavity of the reactor nuclear island containment through an intake pipe, and the exhaust port of the harmful gas detector is connected to the inner cavity of the reactor nuclear island containment through a return pipe.

[0008] Preferably, an intake control valve capable of controlling the on-off of the intake pipe is provided on the intake pipe.

[0009] Preferably, a return control valve capable of controlling the on-off of the return pipe is provided on the return pipe.

[0010] Preferably, it further includes a controller respectively communicatively connected to the harmful gas detector, the intake control valve, and the return control valve.

[0011] Preferably, it further includes an instrument protection cover arranged outside the reactor nuclear island containment, and the harmful gas detector is located in the protection cavity inside the instrument protection cover.

[0012] Preferably, the instrument protection cover is detachably installed on the outer wall of the reactor nuclear island containment.

[0013] Preferably, a positioning bracket is provided in the protection cavity of the instrument protection cover, and the harmful gas detector is detachably installed on the positioning bracket.

[0014] Preferably, an intake guide hole and a return guide hole communicating with the protection cavity are penetrated through the instrument protection cover. The intake pipe is inserted into the intake guide hole in alignment, and the outer wall of the intake pipe is closely attached to the inner wall of the intake guide hole;

[0015] The return pipe is detachably installed in the return guide hole in alignment, and the outer wall of the return pipe is closely attached to the inner wall of the return guide hole.

[0016] Preferably, both the intake pipe and the return pipe are flexible hoses.

[0017] The present utility model further provides a nuclear power plant reactor building, comprising a reactor nuclear island containment and a harmful gas detection device, and the harmful gas detection device is the harmful gas detection device described in any one of the above.

[0018] Compared with the above background art, for the harmful gas detection device provided by the present utility model, during the assembly, operation and use process, after starting the harmful gas detector, the gas in the reactor building sequentially enters the harmful gas detector through the intake pipe and the air inlet, and the harmful gas detector detects the concentration and content of harmful gases in these gases. The staff determines whether the internal environment of the current nuclear power plant reactor building meets the conditions for personnel entry according to the measurement results of the harmful gas detector. The gas after being measured by the harmful gas detector is discharged through the exhaust port and then re-entered into the internal environment of the reactor building through the return pipe, so as to avoid adverse effects of these gases on the external environment of the reactor building. The entire detection operation process of the harmful gas detector can complete the detection operation of harmful gases without the staff entering the interior of the reactor building, effectively avoiding the harm to the personal health of the detection operators caused by the harmful gases inside the reactor building, and also avoiding the harm such as nuclear radiation suffered by the harmful gas detection operators when entering the interior of the reactor building for detection, improving the operation safety of the entire detection process, and the entire gas detection process can be completed relying on the sequentially connected gas pipelines and the harmful gas detector, without manual operation by the staff, thereby greatly improving the detection efficiency of harmful gases inside the corresponding reactor building and correspondingly improving the maintenance and repair operation efficiency of the relevant equipment in the nuclear power plant reactor building.

[0019] In another preferred embodiment of the present utility model, an intake control valve capable of controlling the on-off of the intake pipe is provided on the intake pipe. During the operation and use of the equipment, the staff can control the conduction and cut-off of the intake pipe by adjusting the opening and closing of the intake control valve, so as to isolate the harmful gas detector from the internal gas environment of the reactor building when necessary, thereby meeting the maintenance and repair of the corresponding harmful gas detector and its related supporting devices or the replacement of corresponding component consumables, etc., and improving the operation convenience and operation efficiency of the harmful gas detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Schematic diagram of the component layout structure of the harmful gas detection device provided by a specific embodiment of the present utility model.

[0022] Wherein:

[0023] 10 - Nuclear island containment;

[0024] 11 - Harmful gas detector;

[0025] 12 - Inlet pipe; 121 - Inlet control valve;

[0026] 13 - Return pipe; 131 - Return control valve;

[0027] 14 - Instrument protection cover; 141 - Protection cavity; 142 - Inlet guide hole; 143 - Return guide hole; 144 - Access opening; 145 - Access door; 146 - Positioning bracket. Specific embodiment

[0028] The core of the present utility model is to provide a harmful gas detection device, which can accurately detect the content of harmful gases in the gas environment inside the nuclear power plant reactor building without the need for personnel to enter the interior of the building, effectively avoiding the health hazards of the interior working conditions of the building to the detection personnel, improving the safety of the corresponding detection operations, and greatly improving the corresponding detection efficiency; in addition, a nuclear power plant reactor building applying the above harmful gas detection device is also provided.

[0029] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0030] It should be noted in advance that in the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] In addition, in the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include that the first and second features are not in direct contact but are in contact through other features therebetween.

[0032] In addition, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly under and obliquely under the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature. The orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0033] Please refer to Figure 1 .

[0034] In a specific embodiment, the harmful gas detection device provided by the present utility model includes a harmful gas detector 11 arranged outside the reactor nuclear island containment 10. The air inlet of the harmful gas detector 11 is connected to the inner cavity of the reactor nuclear island containment 10 through an air inlet pipe 12, and the exhaust port of the harmful gas detector 11 is connected to the inner cavity of the reactor nuclear island containment 10 through a return pipe 13.

[0035] During the assembly, operation and use process, after the harmful gas detector 11 is started, the gas in the reactor building sequentially enters the harmful gas detector 11 through the air inlet pipe 12 and the air inlet, and the harmful gas detector 11 detects the concentration and content of harmful gases in these gases. The staff determines whether the internal environment of the current nuclear power plant reactor building is suitable for personnel to enter according to the measurement results of the harmful gas detector 11. The gas measured by the harmful gas detector 11 is discharged through the exhaust port and then re-discharged into the internal environment of the reactor building through the return pipe 13, so as to avoid adverse effects of these gases on the external environment of the reactor building.

[0036] The entire detection operation process of the harmful gas detector 11 can complete the detection operation of harmful gases without the staff entering the interior of the reactor building, effectively avoiding the harm to the personal health of the detection operators caused by harmful gases inside the reactor building, and also avoiding the harm such as nuclear radiation suffered by the harmful gas detection operators when entering the interior of the reactor building to conduct detection, improving the operation safety of the entire detection process. Moreover, the entire gas detection process can be completed by relying on the sequentially connected gas pipelines and the harmful gas detector 11, without manual operation by the staff, thus greatly improving the detection efficiency of harmful gases inside the corresponding reactor building and correspondingly improving the maintenance and repair operation efficiency of the relevant equipment in the nuclear power plant reactor building.

[0037] It is not difficult to understand that in practical applications, the harmful gas detector 11 can be selected from one or more of a formaldehyde detector, a carbon monoxide detector, or a detection device for other harmful gases. The staff can flexibly select and adjust the specific type of the harmful gas detector 11 according to the actual working conditions. Of course, considering the actual working conditions of the nuclear power plant reactor, the harmful gas detector 11 should at least include a formaldehyde detector and a carbon monoxide detector.

[0038] In addition, it should be noted that for the layout of nuclear power plant facilities under general working conditions, the nuclear island containment 10 of the nuclear reactor is the core protection structure of the nuclear power plant reactor building. Generally speaking, the nuclear island containment 10 of the nuclear reactor is also the main structure of the reactor building. Correspondingly, the inner cavity of the reactor nuclear island containment 10 is also the internal space of the corresponding reactor building. The descriptions of relevant structural components such as the nuclear power plant reactor building and the nuclear island containment 10 in this solution can be understood accordingly and will not be elaborated here.

[0039] Specifically, an intake air control valve 121 capable of controlling the on-off of the intake pipe 12 is provided on the intake pipe 12. When the equipment is in operation, the staff can control the conduction and cut-off of the intake pipe 12 by adjusting the opening and closing of the intake air control valve 121, so as to isolate the harmful gas detector 11 from the internal gas environment of the reactor building when necessary, thereby meeting the maintenance or component consumable replacement operations of the corresponding harmful gas detector 11 and its related supporting devices, and improving the operation convenience and operation efficiency of the harmful gas detection device.

[0040] On this basis, a reflux control valve 131 capable of controlling the on-off of the reflux pipe 13 is provided on the reflux pipe 13. When the equipment is in operation, the staff can control the conduction and cut-off of the intake pipe 12 by adjusting the opening and closing of the reflux control valve 131, so as to block the connection between the downstream of the harmful gas detector 11 and the internal gas environment of the reactor building when necessary, and prevent the gas from flowing back to the inside of the reactor building through the harmful gas detector 11.

[0041] During actual operation, the intake air control valve 121 and the reflux control valve 131 can be controlled separately for on-off, or the two control valves can be controlled in a linkage manner to match the relevant operation requirements of the reactor building in different situations, improve the working condition adaptability and operation convenience of the harmful gas detection device, so that it can better meet the operation requirements of the nuclear power plant reactor under different working conditions.

[0042] More specifically, a controller may be provided which is communicatively connected to the harmful gas detector 11, the air intake control valve 121 and the reflux control valve 131 respectively. Through the communication connection between the controller and each functional component, the start and stop of the harmful gas detector 11 and the on and off of the air intake control valve 121 and the reflux control valve 131 may be controlled in a linked manner, thereby meeting the equipment operation requirements under different working conditions, and significantly improving the control accuracy and operating convenience of the harmful gas detection device, so that its working efficiency can be optimized accordingly.

[0043] In practical applications, the controller can be a single-chip microcomputer, or a computer, a mobile phone, or other operating terminals capable of realizing information feedback and communication control.

[0044] Generally, the controller can be integrated into the main structure of the harmful gas detection device, or it can be separately arranged outside the harmful gas detection device. The staff can flexibly select and adjust the specific structural layout and assembly form of the controller and its related matching parts according to the actual working conditions and equipment assembly space. In principle, any method can be used as long as it can meet the actual application needs of the harmful gas detection device.

[0045] On the other hand, the harmful gas detection device further includes an instrument protection cover 14, and the harmful gas detector 11 is located in a protection cavity 141 in the instrument protection cover 14. The instrument protection cover 14 can provide sufficient assembly space and reliable structural protection for the harmful gas detector 11, thereby preventing the working environment and supporting equipment related to the nuclear power plant reactor from interfering with or adversely affecting the harmful gas detector 11.

[0046] Generally, the instrument protection cover 14 can be detachably mounted on the outer wall of the reactor nuclear island containment 10 by means of screw assembly or adapter snap-on assembly, so that the instrument protection cover 14 can be completely removed when necessary to implement corresponding component inspection, maintenance or replacement operations.

[0047] Of course, the instrument protection cover 14 can also be arranged on the ground or supporting structure such as a frame outside the reactor nuclear island containment 10 to match the assembly space layout under different working conditions and facilitate the staff to perform corresponding operations and adjustments on the instrument protection cover 14 and the harmful gas detector 11 inside it.

[0048] It should be noted that in actual applications, an observation window can be arranged on the main structure of the instrument protection cover 14, or the instrument protection cover 14 can be made of transparent glass or engineering plastics and other materials, so that the staff can intuitively view the detection data and operating status of the harmful gas detector 11, thereby understanding the gas environment status inside the reactor building in real time.

[0049] Furthermore, a positioning bracket 146 is provided in the protection cavity 141 of the instrument protective cover 14, and the harmful gas detector 11 is detachably installed on the positioning bracket 146. The positioning bracket 146 can provide stable assembly positioning and reliable structural support for the harmful gas detector 11, so as to prevent the structural vibration of related equipment during the operation of the equipment from having an adverse impact on the detection process of the harmful gas detector 11, and ensure the measurement accuracy and working efficiency of the harmful gas detector 11.

[0050] On this basis, an access opening 144 can be arranged on the instrument protective cover 14, so that the harmful gas detector 11 can be placed inside the instrument protective cover 14 or taken out from the instrument protective cover 14 through the access opening 144.

[0051] Correspondingly, an access door 145 that can be opened and closed can also be arranged in alignment with the access opening 144, so as to ensure the relative isolation of the internal space of the instrument protective cover 14 from the external environment by closing the access door 145, and open the access door 145 when necessary to realize the taking and placing of the harmful gas detector 11 in the instrument protective cover 14.

[0052] In addition, an air inlet guide hole 142 and a return guide hole 143 communicating with the protection cavity 141 penetrate through the instrument protective cover 14. The inlet pipe 12 is inserted into the air inlet guide hole 142 in alignment, and the outer wall of the inlet pipe 12 is in close fit with the inner wall of the air inlet guide hole 142; while the return pipe 13 is detachably installed in the return guide hole 143 in alignment, and the outer wall of the return pipe 13 is in close fit with the inner wall of the return guide hole 143. The air inlet guide hole 142 and the return guide hole 143 can provide stable structural positioning and reliable structural support for the inlet pipe 12 and the return pipe 13, so as to ensure the stable assembly position of the inlet pipe 12 and the return pipe 13 with related mating parts, and ensure the smooth operation and accurate detection of the corresponding harmful gas detector 11.

[0053] Correspondingly, annular soft pads can be respectively installed between the inner wall of the air inlet guide hole 142 and the outer wall of the inlet pipe 12, and between the inner wall of the return guide hole 143 and the outer wall of the return pipe 13. The annular soft pads can not only further optimize the airtightness of the mating surfaces between the respective guide holes and their corresponding pipe bodies, but also provide appropriate structural buffering for the corresponding pipe hole adaptation structures, so as to prevent the structural vibration or pipe body swing during the operation of the equipment from causing rigid impact and structural damage to the main structures of the respective pipe bodies and guide holes, thereby ensuring the overall structural strength and reliability of the harmful gas detection device.

[0054] In addition, both the intake pipe 12 and the return pipe 13 are flexible hoses. The flexible hose structure is flexible and has strong adaptability to the assembly space, which can fully meet the component assembly requirements under different working conditions, and further avoid rigid contact and structural impact between the intake pipe 12 and the return pipe 13 and their related mating parts, and avoid structural damage to each pipe body and its related mating components, thereby further improving the assembly strength and structural reliability of the harmful gas detection device.

[0055] In a specific embodiment, the nuclear power plant reactor building provided by the present invention includes a reactor nuclear island containment and a harmful gas detection device, and the harmful gas detection device is the harmful gas detection device as described above. The harmful gas detection device of the nuclear power plant reactor building can accurately detect the content of harmful gases in the gas environment inside the building without personnel entering the inside of the nuclear power plant reactor building, effectively avoiding the health hazards of the detection personnel caused by the internal working conditions of the building, improving the safety of the corresponding detection operation, and greatly improving the corresponding detection efficiency.

[0056] In summary, the harmful gas detection device provided in the present invention includes a harmful gas detector arranged outside the reactor nuclear island containment. The intake port of the harmful gas detector is connected to the inner cavity of the reactor nuclear island containment through an intake pipe, and the exhaust port of the harmful gas detector is connected to the inner cavity of the reactor nuclear island containment through a return pipe.

[0057] During its assembly, operation and use, after the harmful gas detector is started, the gas in the reactor building sequentially enters the harmful gas detector through the intake pipe and the intake port, and the harmful gas detector detects the concentration and content of harmful gases in these gases. The staff determines whether the internal environment of the current nuclear power plant reactor building meets the conditions for personnel to enter according to the measurement results of the harmful gas detector. The gas after being measured by the harmful gas detector is discharged through the exhaust port and then re-entered into the internal environment of the reactor building through the return pipe to prevent these gases from having an adverse impact on the external environment of the reactor building.

[0058] The entire detection operation process of the harmful gas detector can complete the detection operation of harmful gases without the staff entering the inside of the reactor building, effectively avoiding the harm of harmful gases inside the reactor building to the personal health of the detection operators, and also avoiding the hazards such as nuclear radiation suffered by the harmful gas detection operators when entering the inside of the reactor building for detection, improving the operation safety of the entire detection process, and the entire gas detection process can be completed by relying on the sequentially connected gas pipelines and the harmful gas detector, without manual operation by the staff, thereby greatly improving the detection efficiency of harmful gases inside the corresponding reactor building and correspondingly improving the maintenance and repair operation efficiency of the related equipment in the nuclear power plant reactor building.

[0059] The present utility model also provides a nuclear power plant reactor building, the harmful gas detection device of which can accurately detect the content of harmful gases in the internal gas environment of the building without personnel entering the interior of the nuclear power plant reactor building, effectively avoiding the health hazards of the internal working conditions of the building to the detection personnel, improving the safety of the corresponding detection operation, and greatly improving the corresponding detection efficiency.

[0060] The above has introduced in detail the harmful gas detection device provided by the present utility model and the nuclear power plant reactor building applying the harmful gas detection device. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A harmful gas detection device, characterized in that, It includes a harmful gas detector arranged outside the containment of the reactor nuclear island. The air inlet of the harmful gas detector is connected to the inner cavity of the containment of the reactor nuclear island through an intake pipe, and the air outlet of the harmful gas detector is connected to the inner cavity of the containment of the reactor nuclear island through a return pipe.

2. The harmful gas detection device according to claim 1, wherein, An intake control valve capable of controlling the on / off of the intake pipe is provided on the intake pipe.

3. The harmful gas detection device according to claim 2, wherein A return control valve capable of controlling the on / off of the return pipe is provided on the return pipe.

4. The harmful gas detection device according to claim 3, wherein, It further includes a controller respectively communicatively connected to the harmful gas detector, the intake control valve, and the return control valve.

5. The harmful gas detection device according to claim 1, characterized in that, It further includes an instrument protection cover arranged outside the containment of the reactor nuclear island, and the harmful gas detector is located in a protection cavity inside the instrument protection cover.

6. The harmful gas detection device according to claim 5, characterized in that, The instrument protection cover is detachably installed on the outer wall of the containment of the reactor nuclear island.

7. The harmful gas detection device according to claim 6, characterized in that, A positioning bracket is provided in the protection cavity of the instrument protection cover, and the harmful gas detector is detachably installed on the positioning bracket.

8. The harmful gas detection device according to claim 5, wherein An intake guide hole and a return guide hole communicating with the protection cavity penetrate through the instrument protection cover. The intake pipe is inserted into the intake guide hole in alignment, and the outer wall of the intake pipe is in close fit with the inner wall of the intake guide hole; The return pipe is detachably installed in the return guide hole in alignment, and the outer wall of the return pipe is in close fit with the inner wall of the return guide hole.

9. The harmful gas detection device according to claim 1, wherein Both the intake pipe and the return pipe are flexible hoses.

10. A reactor building of a nuclear power plant, comprising a reactor nuclear island containment and a harmful gas detection device, characterized in that, The harmful gas detection device is the harmful gas detection device according to any one of claims 1 to 9.

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