Demolition work methods

Abstract

To provide a risk evaluation method which can properly evaluate risk resulting from chemical materials produced upon demolition of a facility and a building.SOLUTION: A risk evaluation method includes: a handling amount level determination process of determining a handling amount level responding to a handling amount of chemical materials handled by a facility upon its operation or a handling amount level responding to a handling amount of chemical materials handled upon demolition; a dispersion level determination process of determining a dispersion level responding to a degree of dispersion of chemical materials predicted upon demolition; an exposure level determination process of determining an exposure level responding to a degree in which a demolition operator is exposed to the chemical materials based on the handling amount level and the dispersion level; and a risk level determination process of determining a risk level responding to a risk of chemical materials based on the exposure level and an exposure limit value of chemical materials affecting health of the demolition operator. Thus, the risk level for each of a facility and a building to be demolished is determined.SELECTED DRAWING: Figure 2

Description

Technical Field

[0007] , , and the demolition work to be carried out using the evaluation results. ,

[0006]

[0001] The present invention relates to Demolition work a method.

Background Art

[0002] Patent Document 1 discloses a manufacturing apparatus for producing highly pharmacologically active pharmaceuticals. Further, Patent Document 1 discloses that since highly pharmacologically active pharmaceuticals may affect the health of workers, as a measure to prevent the scattering of pharmaceutical powders (containment of pharmaceutical powders), work is performed within a physically enclosed containment apparatus such as an isolator.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When disassembling a building in which an apparatus for handling chemical substances that affect the human body as described in Patent Document 1 is installed, it is necessary to consider the possibility that chemical substances remain or adhere not only to the apparatus but also to pipes, ceilings, walls, etc. connected to the isolator of the apparatus.

[0005] The risk of chemical substances when disassembling such a building has been considered each time, but it has not been systematic, and it has been difficult to say that the risk has been appropriately evaluated.

[0006] The present invention aims to appropriately evaluate the risk of chemical substances when disassembling a building provided with facilities for handling chemical substances and the demolition work to be carried out using the evaluation results. and provides a method therefor.

Means for Solving the Problems

[0007] This invention relates to the demolition of facilities that handle chemical substances and buildings in which such facilities are installed. to, Assessing the risks posed by chemical substances and the demolition work to be carried out using the evaluation results. It is a method, The estimated amount of the chemical substance in the entire facility, based on the amount of the chemical substance measured in a sample area of ​​the facility and the size of the sample area, or The chemical substances that the equipment handled when it was in operation Per unit time Volume handled Using the handling volume estimated by an estimation method based on the equipment specifications or work process chart, A process for determining the handling amount level according to the amount of chemical substance being handled, The size of chemical particles in the sample area is measured, the degree of chemical adhesion is measured, and based on the size of the chemical particles, the degree of chemical adhesion, and the preset dispersion level definition data, Determine the dispersion level based on the expected degree of chemical dispersion during demolition. Alternatively, the dispersion level is determined based on the degree of chemical dispersion, according to the equipment's past manufacturing history. Dispersion level determination process, handling volume level, dispersion level, Pre-set exposure level definition data, Based on this, an exposure level determination process is performed to determine the exposure level corresponding to the degree to which demolition workers are exposed to chemical substances, and the exposure level and the chemical substances that affect the health of demolition workers This is the permissible exposure concentration. A risk level determination process that determines the risk level corresponding to the risk of the chemical substance based on the exposure limit value, A ventilation level determination process that determines a ventilation level corresponding to the degree of ventilation of the equipment when it was in operation, based on pre-set ventilation level definition data; a risk correction process that corrects the risk level based on the risk level and the ventilation level; a dismantling work process that determines the equipment to be worn by the dismantling worker based on the corrected risk level and pre-set equipment definition data, and performs the dismantling work of the equipment according to the work guidelines determined based on the corrected risk level and pre-set work guideline definition data. Includes Demolition work It is a method. [Effects of the Invention]

[0008] According to the present invention, the risks posed by chemical substances when demolishing a building equipped with facilities that handle chemical substances can be appropriately evaluated, and an appropriate work method can be selected. [Brief explanation of the drawing]

[0009] [Figure 1] This is a floor plan of a building equipped with facilities for handling chemical substances according to an embodiment of the present invention. [Figure 2] This is a flowchart showing the flow for determining the risk level of equipment according to an embodiment of the present invention. [Figure 3] This is a table showing the scattering levels of equipment according to an embodiment of the present invention. [Figure 4] This is a table for determining the exposure level of equipment according to an embodiment of the present invention. [Figure 5] This is a table for determining the risk level of equipment according to the embodiment of the present invention. [Figure 6]This is a table showing a list of equipment during demolition work according to the risk level related to an embodiment of the present invention. [Figure 7] This is a flowchart showing a flow for determining the risk level of a building according to an embodiment of the present invention. [Figure 8] This is a table showing the scattering level of a building according to an embodiment of the present invention. [Figure 9] This is a table for determining the exposure level of a building according to an embodiment of the present invention. [Figure 10] This is a table for determining the risk level of a building according to an embodiment of the present invention. [Figure 11] This is a table for determining the ventilation level according to an embodiment of the present invention. [Figure 12] This is a table for determining the corrected risk level of a building according to an embodiment of the present invention. [Figure 13] This is a diagram showing an example of a ventilation duct connected to equipment according to an embodiment of the present invention. [Figure 14] This is a diagram showing an example of a ventilation duct connected to the air conditioning equipment of a building according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0011] The present invention relates to a risk assessment method for evaluating the risk caused by chemical substances when demolishing a building 1 provided with equipment 90 for handling chemical substances.

[0012] First, referring to FIG. 1, an example of a research and production facility for highly pharmacologically active pharmaceuticals will be briefly described. FIG. 1 is a floor plan of a building 1 provided with equipment 90 for handling chemical substances.

[0013] As shown in Figure 1, the building 1 is equipped with a control room 10, a changing room 20, an entrance-side shower room 30A, an exit-side shower room 30B, an anteroom 40, a shower room 50, a control room 60A, a control room 60B, a storage room 70, and a machine room 80.

[0014] Control room 10 is a space where workers perform administrative tasks. An air conditioning unit (not shown) is installed on the ceiling of control room 10.

[0015] The changing room 20 is a space for workers to put on and take off cleanroom wear. Workers put on cleanroom wear in the changing room 20 when working in the anteroom 40, adjustment room 60A, or adjustment room 60B.

[0016] The entrance-side shower room 30A is equipped with an air shower device (not shown) for removing dust and other particles and microorganisms attached to clothing. When workers enter the anteroom 40 from the changing room 20, they enter the entrance-side shower room 30A and use the air shower device to remove dust and other particles and microorganisms attached to their clothing before entering the anteroom 40. This prevents dust and other particles and microorganisms from being brought into the anteroom 40 and the adjustment rooms 60A and 60B.

[0017] The exit-side shower room 30B is equipped with an air shower system to remove fine particles of highly potent pharmaceuticals and other substances that may adhere to clothing when moving from the anteroom 40 to the changing room 20. When workers exit from the anteroom 40 to the changing room 20, they enter the exit-side shower room 30B, use the air shower system to remove fine particles of highly potent pharmaceuticals and other substances that may adhere to their clothing, and then exit to the changing room 20. This prevents fine particles of highly potent pharmaceuticals and other substances from being carried outside from the anteroom 40 and the preparation rooms 60A and 60B.

[0018] The anteroom 40 functions as a buffer space between the control room 10 and the preparation rooms 60A and 60B. The presence of the anteroom 40 prevents highly potent pharmaceuticals from leaking from the preparation rooms 60A and 60B to the control room 10 or other external locations if they leak from the preparation rooms 60A and 60B for any reason. The anteroom 40 is connected to the storage room 70 where raw materials and other items are stored.

[0019] Preparation rooms 60A and 60B are equipped with equipment 90 for producing highly potent pharmaceuticals or conducting research on highly potent pharmaceuticals. This equipment 90 includes pulverizers, weighing and dispensing machines, etc. Depending on the handling conditions of highly potent pharmaceuticals, this equipment 90 may be equipped with negative pressure booths or glove boxes.

[0020] A shower room 50 is provided between the anteroom 40 and the adjustment rooms 60A and 60B. The shower room 50 is equipped with a water shower system. In an emergency (when exposed to radiation), workers can use the water shower system to wet any fine particles of highly pharmacologically active drugs adhering to their clothing, remove their outermost clothing, and take refuge in the anteroom 40.

[0021] The machine room 80 houses power supply equipment for driving the equipment 90 and air conditioning systems, as well as the power source for the air conditioning systems and filter equipment.

[0022] In research and production facilities configured in this manner, chemical substances such as highly potent pharmaceuticals that exert strong therapeutic effects on the human body even in small amounts, such as anticancer drugs, may be used or produced. When dismantling research and production facilities that handle such chemical substances, there is a risk that the chemical substances may become airborne and cause health damage to the dismantling workers. Therefore, it is necessary to determine in advance the equipment and work guidelines for dismantling work, depending on the risks posed by the chemical substances used or produced in the research and production facility.

[0023] Furthermore, if the risks posed by chemical substances are not properly assessed, there is a risk that the equipment and work required during demolition may become excessive. Therefore, in this embodiment, in order to properly assess the risks posed by chemical substances, the risk level is determined based on the flowcharts in Figures 2 and 7. In this embodiment, the risk level is an index that indicates the degree to which it affects the health of demolition workers (risk). The procedure for determining the risk level will be specifically described below with reference to Figures 2 and 7.

[0024] First, we will explain how to determine the risk level Lrm for the equipment 90 to be dismantled, referring to the flowchart shown in Figure 2.

[0025] Step S1 involves identifying the target chemical substances. Specifically, information on the chemical substances used within the equipment 90 to be dismantled is obtained. This information can be obtained, for example, by referring to data sheets obtained from the operators of the production facilities or laboratories. The term "chemical substances" here includes not only highly potent pharmaceuticals but also all chemical substances used in equipment 90 that may affect the human body. Furthermore, equipment 90 includes not only production and research equipment that uses or produces chemical substances, but also ancillary equipment such as ventilation ducts 91 (see Figure 13) connected to them.

[0026] In step S2, the handling volume level Lvm is determined. Specifically, the amount of chemical substances to be handled when dismantling the equipment 90 is estimated, and the handling volume level Lvm is determined according to this amount. The handling volume here refers to the amount of chemical substances remaining in the equipment 90 to be dismantled. For example, let's consider the case where the equipment 90 is a ventilation duct 91 of an air conditioning system that was attached to the chemical preparation device 90A (see Figure 13). First, a part of the ventilation duct 91 is designated as a sample area, and the amount of the target chemical substance remaining in this sample area is measured. Then, based on the measured amount of the remaining chemical substance and the size of the sample area (length, surface area, volume, etc.), the amount of the chemical substance remaining in the entire ventilation duct 91 to be dismantled is estimated. In this embodiment, the handling volume level Lvm is divided into three levels according to the handling volume, for example, small (less than 1 kg), medium (1 kg or more but less than 1 ton), and large (1 ton or more). Note that the process in step S2 corresponds to the "handling volume level determination process" in the claims.

[0027] Furthermore, it is preferable to set the sample area to include locations where a large amount of residual chemical substances is expected, such as the vicinity of the chemical preparation device 90A and the bend 91A of the ventilation duct 91. Including such locations where a large amount of residual chemical substances is expected in the sample area prevents the total amount of residual chemical substances in the entire demolition target, that is, the amount of chemical substances handled during demolition, from being underestimated. If the above-mentioned locations are included in the sample area, there is a high possibility that the estimated amount of residual chemical substances will be higher than the actual amount. However, estimating the risk level based on a high residual amount will work in a direction that is safer for demolition workers. Therefore, the sample area should be set to include as many locations as possible where a large amount of residual chemical substances is expected. This will more reliably ensure the safety of demolition workers.

[0028] In step S3, the dispersion level Lfm is determined. The dispersion level is an index indicating the degree of dispersion of chemical substances predicted during demolition. In this embodiment, as shown in Figure 3, the dispersion level Lfm is divided into three levels: low, medium, and high. Specifically, for the equipment 90 to be demolished, it is classified into one of the three dispersion levels Lfm (low, medium, and high) based on the size (shape) of the chemical substance particles in the sample area and the degree of adhesion of the chemical substance. In the example shown in Figure 3, the degree of adhesion of the chemical substance is divided into two categories: cases where the chemical substance adheres to walls and is unlikely to be dispersed, and cases where the chemical substance does not adhere to walls and is likely to be dispersed. However, it may be divided more finely.

[0029] The dispersion level Lfm is determined by visual inspection and tactile examination by the worker. For example, if the chemical substance adheres to a wall or other surface and does not peel off upon tactile examination, the likelihood of the chemical substance being dispersed is low. Therefore, even if the size (shape) of the chemical substance particles observed visually corresponds to "medium" or "small," the dispersion level Lfm is classified as "low" (see Figure 3). This step S3 corresponds to the "dispersion level determination step" in the claims.

[0030] The classification of dispersion levels (Lfm) may be based not only on visual inspection by workers, but also on measuring the average particle size of the chemical substance, for example, as defined by the "arithmetic mean of particle diameters" in JIS Z 8901 (2006) "Test Powders and Test Granules". Similarly, the degree of adhesion may be judged not only by tactile inspection by workers, but also based on known adhesion tests.

[0031] In step S4, the exposure level Lem is determined. The exposure level is an index indicating the degree to which demolition workers are exposed to a chemical substance. In this embodiment, as shown in Figure 4, the exposure level Lem is divided into four levels: Lem1 to Lem4. Specifically, for the equipment 90 to be demolished, the exposure level is divided into one of Lem1 to Lem4 based on the amount of chemical substance handled (residual amount) estimated in step S2 and the dispersion level Lfm determined in step S3. The exposure levels Lem are Lem1, Lem2, Lem3, and Lem4 in order from lowest to highest degree of exposure. This step in S4 corresponds to the "exposure level determination step" in the claims.

[0032] In step S5, the risk level Lrm is determined according to the risk of chemical substances during the dismantling work of equipment 90. As shown in Figure 5, in this embodiment, the risk level Lrm is divided into four levels, Lrm1 to Lrm4. The risk level Lrm is determined based on the exposure level Lem determined in step S4 and the exposure limit value OEL of the target chemical substance. The exposure limit value OEL [μg / m3] is the occupational exposure limit, which is the permissible exposure concentration at which it is assumed that no health effects will be observed even if a worker works in an environment containing the target chemical substance for a daily working time (8 hours / day, 40 hours / week). The exposure limit value OEL [μg / m3] is determined by the operator of the production facility or laboratory, using methods that have been verified, such as the permissible concentration indicated by the Japan Society for Occupational Health, the UK's Hazardous Chemicals Hygiene Management Regulations (COSHH), and the American Conference of Governmental Industrial Hygienists (ACGIH).

[0033] The risk level Lrm determined in this manner is set for each piece of equipment 90 to be dismantled. During the dismantling work, the work is carried out using equipment corresponding to the risk level Lrm shown in Figure 6. In addition, although not shown in the figure, work guidelines (such as whether a cleaning room is necessary and the work procedure during dismantling) are also set for each risk level Lrm. Note that the process in this step S5 corresponds to the "risk level determination process" in the claims.

[0034] Next, the method for determining the risk level Lrb for Building 1 to be demolished will be explained with reference to the flowchart shown in Figure 7. The risk level Lrb for Building 1 is determined by dividing Building 1 into predetermined sections and determining the risk level for each section. The predetermined sections can be of any size and are set for each room, for example, adjustment room 60A, adjustment room 60B, and storage room 70.

[0035] Step S11 identifies the target chemical substances. Specifically, information on the chemical substances used or produced in facility 90 while it was in operation is obtained. Methods for obtaining information on chemical substances include, for example, referring to data sheets obtained from the operators of the production facilities or laboratories to identify the target chemical substances. Note that the chemical substances referred to here include not only highly potent pharmaceuticals but also all chemical substances used in facility 90 that could potentially affect the human body. Furthermore, building 1 includes not only structural elements such as columns and walls, but also ancillary equipment such as ventilation ducts 11 (see Figure 14) for air conditioning systems installed on the ceiling, etc.

[0036] In step S12, the handling volume level Lvb is determined. Specifically, the handling volume level Lvb is estimated based on the amount of chemical substances handled by the equipment 90 installed in each section when the equipment 90 was in operation. Specifically, the amount of chemical substances handled by the equipment 90 per unit time (for example, per day) is estimated based on the equipment 90's specifications or work schedule. If the handling volume was high when the equipment 90 was in operation (in the past), it is possible that a large amount of chemical substances were dispersed or remained in building 1. Therefore, in this embodiment, the handling volume level Lvb is determined in this manner.

[0037] In this embodiment, the handling volume level Lvb is divided into three levels, for example, low (less than 1 kg), medium (1 kg or more but less than 1 ton), and high (1 ton or more), depending on the amount of chemical substance handled by the equipment 90 when the equipment 90 was in operation. Note that the process in step S12 corresponds to the "handling volume level determination process" in the claims.

[0038] In step S13, the dispersion level Lfb is determined. In this embodiment, as shown in Figure 8, the dispersion level Lfb is divided into three levels: low, medium, and high. Specifically, when the equipment 90 installed in each section to be demolished is in operation, the dispersion level Lfb is divided into one of the three levels: low, medium, or high, based on the size (shape) of the chemical particles handled by the equipment 90. Note that the process in step S13 corresponds to the "dispersion level determination process" in the claims.

[0039] In step S14, the exposure level Leb is determined. In this embodiment, as shown in Figure 9, the exposure level Leb is divided into four levels, Leb1 to Leb4. Specifically, for building 1 to be demolished, the exposure level is divided into one of Leb1 to Leb4 based on the amount of chemical substance handled estimated in step S12 and the dispersion level Lfb determined in step S13. The exposure levels Leb are Leb1, Leb2, Leb3, and Leb4, in descending order of the degree of exposure. This step S14 corresponds to the "exposure level determination step" in the claims.

[0040] In step S15, the risk level Lrb is determined according to the risk of chemical substances associated with the demolition work of building 1. As shown in Figure 10, in this embodiment, the risk level Lrb is divided into four levels, Lrb1 to Lrb4. The risk level Lrb is determined based on the exposure level Leb determined in step S14 and the exposure limit value OEL of the target chemical substance. Note that the process in step S15 corresponds to the "risk level determination process" in the claims.

[0041] In step S16, the ventilation level Lab is determined. The ventilation level Lab is determined based on the table shown in Figure 11. Specifically, the ventilation level Lab is determined based on the ventilation equipment attached to the equipment 90 installed in the section to be demolished when the equipment 90 was in operation. The ventilation levels Lab are numbered Lab1, Lab2, Lab3, and Lab4 in descending order of ventilation performance. This step S16 corresponds to the "ventilation level determination step" in the claims.

[0042] In step S17, the risk level Lrb is corrected. Specifically, the risk level Lrb is corrected based on the risk level Lrb determined in step S15 and the ventilation level Lab determined in step S16. If the ventilation performance of the equipment 90 installed in the section to be demolished is high, the possibility of chemical substances being emitted from the equipment 90 is low, and therefore the possibility of chemical substances accumulating or adhering to building 1 in that section is also low. Therefore, if the ventilation level Lab is high, the risk level Lrb of building 1 is corrected to be lower. Specifically, the risk level Lrb is corrected based on the table shown in Figure 12, and the corrected risk level Lrc is determined. Note that the process in step S17 corresponds to the "risk correction process" in the claims.

[0043] The corrected risk level Lrc determined in this manner is set for each section of Building 1 to be demolished. During the demolition work, the demolition work is carried out using equipment corresponding to the corrected risk level Lrc shown in Figure 12, for example.

[0044] Note that steps S16 and S17 are not necessarily required. If steps S16 and S17 are not performed, the risk level Lrb will act in a direction that is safer for demolition workers than the corrected risk level Lrc.

[0045] Thus, in this embodiment, the risk levels Lrm and Lrb are determined based on the amount of chemical substance handled, the degree of chemical substance dispersion, the degree of worker exposure, and the exposure limit value OEL. This allows for an appropriate assessment of the risks posed by chemical substances during demolition.

[0046] Furthermore, since the risk levels Lrm and Lrb due to chemical substances are determined systematically, as shown in the flowcharts in Figures 2 and 7, the risks posed by chemical substances during demolition can be evaluated more appropriately.

[0047] Furthermore, by determining the risk levels Lrm and Lrb for both the building 1 and the equipment 90 to be demolished, excessive equipment and work can be suppressed, thereby controlling cost increases and improving work efficiency.

[0048] Furthermore, by dividing the building 1 to be demolished into predetermined sections and determining the risk level Lrb for each section, the risks can be assessed more appropriately. It should be noted that when determining the sections, it is not always necessary to divide each room; for example, if the risk level Lrb is presumed to be the same, multiple rooms may be treated as a single section. Specifically, for example, the entrance shower room 30A, the exit shower room 30B, and the anteroom 40 may be treated as a single section. This reduces the number of times the risk level Lrb needs to be determined while still allowing for an appropriate assessment of the risks associated with the demolition work.

[0049] Conversely, one room may be divided into two sections. Specifically, for example, the anteroom 40 may be divided into a section near the entrance shower room 30A and the exit shower room 30B, and a section near the shower room 50. This allows for a more appropriate assessment of the risks associated with the demolition work.

[0050] Furthermore, by evaluating risk using a corrected risk level Lrc, which is obtained by correcting the risk level Lrb based on the ventilation level Lab, it is possible to suppress overestimation of the building's risk. This prevents excessive equipment and work, thereby suppressing cost increases and improving work efficiency.

[0051] In the above embodiment, the remaining amount of chemical substances in the equipment 90 was used as an example to determine the handling level Lvm of the equipment 90 as the amount of chemical substances to be handled during dismantling. However, the invention is not limited to this, and the handling level Lvm of the equipment 90 during dismantling may also be determined based on the amount of chemical substances handled when the equipment 90 is in operation.

[0052] Furthermore, in the above embodiment, the example given was the determination of the handling level Lvb of building 1 based on the amount of chemical substances handled by equipment 90 when equipment 90 was in operation. However, the explanation is not limited to this, and the handling level Lvb of building 1 at the time of demolition may be determined based on the amount of chemical substances remaining in building 1. When estimating the amount of chemical substances remaining in building 1, it is conceivable to use the space above the ceiling, the floor near the preparation equipment, and the walls as sample areas. However, since floors and walls may be cleaned before demolition, it is preferable to determine the sample area for the amount of chemical substances remaining while considering the arrangement of equipment 90 and air conditioning equipment.

[0053] In the above embodiment, the dispersion level Lfm was determined by the worker's visual inspection or palpation, but the dispersion level Lfm may also be estimated from the past manufacturing history of the equipment 90.

[0054] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of Symbols]

[0055] 1. Building 11. Ventilation duct 90...equipment 90A... Drug preparation equipment (facility) 91...Ventilation duct

Claims

1. A demolition method for dismantling equipment that handles chemical substances and buildings in which such equipment is installed, which involves evaluating the risks posed by the chemical substances and using the results of that evaluation, A handling amount level determination step in which a handling amount level corresponding to the amount of the chemical substance handled is determined using the remaining amount estimated by an estimation method that estimates the remaining amount of the chemical substance in the entire facility based on the remaining amount of the chemical substance measured in a sample area of ​​the facility and the size of the sample area, or the handling amount estimated by an estimation method that estimates the amount of the chemical substance handled per unit time by the facility during its operation based on the specifications or work process chart of the facility, A dispersion level determination step which involves measuring the size of the chemical particles in the sample area, measuring the degree of adhesion of the chemical, determining a dispersion level corresponding to the predicted degree of dispersion of the chemical during demolition based on the size of the chemical particles, the degree of adhesion of the chemical, and preset dispersion level definition data, or determining a dispersion level corresponding to the degree of dispersion of the chemical based on the past manufacturing history of the equipment, An exposure level determination step, which determines an exposure level corresponding to the degree to which demolition workers are exposed to the chemical substance, based on the handling amount level, the dispersion level, and preset exposure level definition data, A risk level determination step, which determines a risk level corresponding to the risk of the chemical substance based on the exposure level and the exposure limit value, which is the permissible exposure concentration of the chemical substance that affects the health of demolition workers, A ventilation level determination step, which determines a ventilation level corresponding to the degree of ventilation of the equipment when the equipment was in operation, based on pre-set ventilation level definition data, A risk correction step for correcting the risk level based on the risk level and the ventilation level, A dismantling process includes determining the equipment to be installed by the dismantling worker based on the corrected risk level and pre-set equipment definition data, and performing the dismantling work of the equipment in accordance with the work guidelines determined based on the corrected risk level and pre-set work guideline definition data. Demolition work methods.

2. A demolition work method as described in claim 1, The building to be demolished is divided into predetermined sections, In the risk level determination step, the risk level for the demolition work of the building is determined for each section. Demolition work methods.

3. A demolition method as described in claim 2, In the ventilation level determination step, a ventilation level is determined that corresponds to the degree of ventilation of the equipment installed in the compartment when the equipment was in operation. In the risk correction step, the risk level of the building demolition work in the section to be demolished is corrected based on the risk level and the ventilation level in the section to be demolished. Demolition work methods.

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