CN118711809A - A long-term nuclear power occupational health risk training method based on virtual reality - Google Patents

Abstract

The invention discloses a long-term nuclear power occupational health risk training method based on virtual reality, which comprises the following steps: 1) Constructing a virtual experiment scene requiring nuclear power occupational health safety training; 2) Developing a long-term occupational health safety risk "likelihood of occurrence" assessment; 3) Developing a long-term occupational health safety risk "outcome severity" assessment; 4) And developing nuclear power occupational health risk visualization technology research. According to the invention, virtual reality and a safety risk analysis technology are combined, a long-term occupational health safety risk prevention mechanism with safety training as a core is constructed, the risk prediction capability of production personnel is improved, and the self-protection consciousness is improved.

Description

A long-term nuclear power occupational health risk training method based on virtual reality

Technical Field

The invention belongs to the field of safe production and management, and specifically relates to a long-term nuclear power occupational health risk training method based on virtual reality.

Technical Background

As a safe, reliable and clean energy source, nuclear power has become an indispensable resource in today's society. Nuclear power occupational health risk assessment and risk visualization are basic methods to effectively reduce risk exposure and curb the high incidence of nuclear power-related occupational diseases. Long-term occupational health risks are hidden, delayed and cumulative, so they are often ignored in management and are easy to affect producers in actual work. However, traditional occupational health risk assessment mainly focuses on short-term safety risks, such as falling from heights, and lacks assessment of long-term health risks, let alone assessment of nuclear power occupational health risks. Traditional nuclear power occupational health training is mainly classroom teaching, with single content, no sense of presence, low participation and poor training effect. Visual training can enhance students' interest in learning, improve participation, strengthen memory, and achieve good training effect. Virtual reality technology (VR) can artificially construct the required virtual environment and use head-mounted displays, handles and other devices to obtain immersive experience, which restores the real environment to a large extent without suffering real physical damage. The long-term occupational health risk assessment method proposed in the present invention provides a scientific basis for occupational health protection in nuclear power plants, and improves the ability of nuclear power workers to identify nuclear power occupational health risk sources and estimate nuclear power occupational health risks.

Summary of the invention

In view of the problems existing in the prior art, the present invention provides a long-term nuclear power occupational health risk training method based on virtual reality. The overall process of the invented method is shown in FIG1 .

The long-term nuclear power occupational health risk training system based on virtual reality is characterized by comprising the following steps:

1) Construct virtual experimental scenarios for nuclear power occupational health and safety training; use modeling software to build physical models and use Unity 3D to build the virtual environment required for the experiment;

2) Assessment of the "likelihood" of long-term occupational health and safety risks; Analyze the mechanism of nuclear power occupational health diseases, explore the possibility of various risks causing occupational health diseases in time and space dimensions based on the influencing mechanism, and construct a risk probability measurement scale. The specific process is to identify the three main types of long-term occupational health risks, namely noise risk, high temperature risk, and radiation risk, by reviewing the data of the historical operation documents of nuclear power plants, and calculate the probability of each risk occurring.

3) Assessment of the severity of long-term occupational health and safety risk consequences: Based on the theory that the severity of the “reduced quality of life” of personnel caused by each risk type, the method of the Disability Assessment Scale (WHO-DAS) is used to uniformly quantify the severity of the consequences of various multi-source heterogeneous risks and construct a risk consequence severity measurement scale. Based on the score of the degree of completion of each question in the WHO-DAS scale, the severity of occupational health risk consequences based on the WHO-DAS method is calculated.

Among them, the "reduced quality of life" theory belongs to the existing conventional technology, which can be found in the literature JI Z, WANG Y, ZHANG Y, et al. Integrating diminished quality of life with virtual reality for occupational health and safety training [J]. Safety Science, 2023, 158: 105999.

Based on the probability of occurrence of each risk possibility in step 2) and the severity of the consequences of the risk in step 3), calculate the total occupational health risk that a certain behavior will bring.

4) Visualization of nuclear power occupational health risks: Based on the types of work, work scenarios, production operation processes, etc. of nuclear power plant workers, a nuclear power occupational health risk visualization platform based on virtual reality technology is designed.

Furthermore, in step 2), the specific steps for assessing the “likelihood of occurrence” of long-term occupational health and safety risks are as follows:

S1: The possibility of long-term occupational health risks has the characteristics of time domain dimension. The following formula 1 calculates the possibility of occupational health risks:

L＝f(t,T) (1)

In the formula, t represents the exposure time of workers to this type of risk; T represents the required exposure time for occupational health diseases; L represents the probability of occupational risk occurrence, expressed as a percentage, with a probability value between 0% and 100%. The required exposure time T for different occupational health diseases is different due to the different mechanisms of different health diseases, so further discussion and analysis is required according to the risk category.

Formula 1 is a general expression, which means that the probability of occurrence of different risks L is a functional relationship with t and T. The t and T values corresponding to different risks are discussed separately below.

S2: Noise risk-Possibility of occupational noise-induced hearing loss

The pathogenesis of occupational noise-induced hearing loss is mainly related to the equivalent sound level and the duration of exposure to the equivalent sound level.

First, divide the working hours of a day into n time periods according to the principle of similar sound levels, use an integrating sound level meter to measure the equivalent sound level of each time period, and calculate the equivalent sound level of the whole day according to formula 2:

Where, L _Aeq,T represents the equivalent sound level throughout the day, in decibels (dB); represents the equivalent sound level in time period _Ti , in decibels (dB); T represents the total time of all time periods, in hours (h); _Ti represents the time of time period i, in hours (h); n represents the total number of time periods;

The maximum duration of exposure to noise that workers are allowed to experience each day is determined by the equivalent sound level throughout the day, as shown in Formula 3:

Where, T _max represents the exposure time limit, in hours (h); L _Aeq,T represents the equivalent sound level for the whole day, in decibels (dB); the T _max value can be calculated when the equivalent sound level in the working scene is determined;

During the construction of Formula 3, relevant literature was consulted. When the ambient sound level is 82dB, the recommended maximum time per day is 16h, and the time is reduced by half for every 3dB increase in the sound level.

In addition, since the working hours of personnel are not continuous, they may work in an 82dB environment for 2 hours in the morning and in an 88dB environment for 3 hours in the afternoon. Therefore, the equivalent sound levels of different time periods need to be unified into the equivalent sound level of the whole day.

In summary, the probability of occupational noise-induced hearing loss can be expressed by formula 4:

Where L _H represents the possibility of occupational noise-induced hearing loss, expressed in percentage; t represents the exposure time to noise risk, in hours (h).

S3: High temperature risk - possibility of occupational heat stress

The possibility of occupational heat stress risk can be expressed by formula 5:

Wherein, _LT represents the possibility of occupational heat stress risk; t represents the duration of exposure to high temperature environment, in minutes (min); _TF represents the maximum continuous working time per hour that a worker can work when the query temperature is F, in minutes (min).

S4: Radioactive risk - possibility of occupational radiation sickness

Nuclear power workers who continue to work in a radioactive environment will be exposed to radiation above a certain dose, which poses an occupational health and safety risk of radiation-induced diseases. China stipulates that the nuclear power radiation dose should comply with the relevant requirements of GB 18871-2002 and GBZ/T 232-2010, setting 20 mSv as the annual dose limit, and using this as a standard to construct a method for assessing the possibility of nuclear power radiation-induced diseases.

The probability of occupational radiation sickness risk can be determined by formulas 6 and 7

E＝ _ep +t×e (7)

In the formula, _LR represents the possibility of occupational radiation sickness risk; E represents the cumulative radiation dose of the worker, in millisievert (mSv); _El represents the radiation dose limit, i.e. 20mSv; _ep represents the cumulative radiation dose of the worker that year, in millisievert (mSv); t represents the time of exposure to radioactive risk, in hours (h); e represents the radiation amount per unit time, in millisievert/hour (mSv/hr).

The long-term nuclear power occupational health risk training system based on virtual reality is characterized in that in step 3), the specific steps of the long-term occupational health and safety risk "consequence severity" assessment are as follows:

S1: Design the consequence severity measurement standard using the "reduced quality of life" theory. The WHODAS scale is used to measure the severity of the consequences. The difficulty of the impact of different dimensions is represented by the Likert scale "0-4", where "0" means no difficulty; "4" means impossible to complete or extremely difficult. Table 3 is the WHODAS consequence severity analysis table. The severity C of occupational health risk consequences based on WHODAS can be calculated by formula 8.

In the formula, q is the difficulty evaluation score in the WHODAS question, which is an integer between 0 and 4, and γ is the WHODAS question number. a represents the total number of questions in the WHO-DAS scale. The present invention adopts a scale of 36 questions, so a=36; b represents the maximum total score of the WHO-DAS scale, and the total score in the present invention is b=36×4=144. C is converted into a percentage after calculation. The larger the C value, the greater the impact of the consequences on the quality of life, and therefore the greater the severity of the consequences brought by the risk. The smaller the C value, the smaller the severity of the consequences brought by the risk.

Table 3: WHODAS-36item consequence severity analysis table (partial)

For each question in Table 3, the personnel's degree of completion after the risk exposure is scored, with the score value being an integer between 0 and 4.

S2: Risk fusion calculation. It is proposed that the total occupational health risk of nuclear power can be calculated using formula 9.

In the formula, R _Sum represents the total occupational health risk brought about by a certain behavior, R _n represents the risk value of n risk sources, L _n represents the possibility that workers may develop occupational health diseases when exposed to n risk sources (n risk sources correspond to the three situations of noise risk, high temperature risk, and radiation risk mentioned above), and C _n represents the amount of decline in the quality of life of workers exposed to n risk sources, that is, the severity of the risk consequences of n risk sources.

Furthermore, in step 4), the visualization of occupational health risks in nuclear power is to construct an "occupational health risk visualization" interface related to the work scene and operation process. The Unity 3D virtual engine is used to perform scene rendering and material mapping operations of multiple texture fusion on the three-dimensional model of the nuclear power plant to obtain a highly restored virtual nuclear power plant. Add a character control module, a collision detection module, and a human-computer interaction module to realize the roaming interaction function of the virtual plant. The virtual scene interface is shown in Figure 4. Perform risk visualization modeling and construct an occupational health risk characterization module. This visualization characterization can be used to monitor the occupational health risks exposed to workers during operation in real time, prompt workers to the occupational health risk level brought about by related operations, reduce workers' dangerous operations, reduce the probability of workers' voluntary exposure to occupational health risks, improve workers' risk source identification ability, and improve their self-health and safety protection awareness, as shown in Figure 5.

The present invention provides a long-term nuclear power occupational health risk training system based on virtual reality, which can show the occupational health risk values and risk levels related to the user's operation in real time in a VR environment. It specifically includes four steps, namely, building a virtual training scenario, assessing the "possibility of occurrence" of long-term occupational health and safety risks, assessing the "severity of consequences" of long-term occupational health and safety risks, and visualizing nuclear power occupational health risks. The system can enhance the user's awareness of occupational health and safety protection and reduce the probability of autonomous exposure to nuclear power occupational health risks.

Compared with the prior art, the beneficial effects achieved by the present invention are: the occupational health risks faced in the process of nuclear power production and maintenance are huge, but the traditional maintenance training process focuses on the training of skills and lacks training on occupational health risks. The system can intuitively display the long-term nuclear power occupational health risks on the user interface, improving the user's ability to identify the source of occupational health risks and avoid risks. At the same time, virtual training also eliminates the possibility of actual harm to the trainees during the on-site training process, protecting the life and health of nuclear power workers.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic flow diagram of the method of the present invention.

Figure 2 is the NIOSH work/rest schedule (no special clothing requirements).

Figure 3 shows a work/rest schedule (with protective clothing).

Figure 4 shows an immersive virtual reality spent fuel cooling system scene.

Figure 5 is the occupational health risk visualization interface.

DETAILED DESCRIPTION

The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

Example:

A maintenance operation risk assessment and visualization system for a spent fuel cooling room of a nuclear power plant based on virtual reality comprises the following steps:

Step 1: Build a virtual scene of the cooling room;

Step 2: Assess the likelihood of risks occurring during maintenance operations;

Step 3: Assess the severity of the consequences of risks in maintenance operations;

Step 4: Build a risk visualization interface.

1. Build a virtual scene of the cooling room:

1) Use 3D Max, a 3D drawing software, to add basic scene geometric elements, including lines, circles, and rectangles, and draw heat exchangers, pumps, pipeline instruments, and other nuclear power production equipment and factory buildings through translation, rotation, stretching, splicing, and subtraction.

2) Import the generated FBX file into the virtual engine Unity 3D, perform scene rendering and material mapping operations with multiple texture fusion, and obtain a virtual nuclear power plant spent fuel cooling room with high restoration.

2. Assess the possibility of risks in maintenance operations:

1) By reviewing the historical operating documents of nuclear power plants, the three main long-term occupational health risks were identified: noise risk, high temperature risk, and radiation risk.

2) Using the algorithm formula in step 2, calculate the trend of various risks changing over time for subsequent use.

By reviewing the data from the historical operation documents of nuclear power plants, the three main types of long-term occupational health risks were identified, namely noise risk, high temperature risk, and radiation risk, and the probability of each risk occurring was calculated:

S1: The possibility of long-term occupational health risks has the characteristics of time domain dimension. The following formula 1 calculates the possibility of occupational health risks:

L＝f(t,t) (1)

In the formula, L represents the probability of occurrence of occupational risk, expressed in percentage form, with the probability value ranging from 0% to 100%; t represents the exposure time of workers to this type of risk; T represents the required risk exposure time for occupational health diseases; the required risk exposure time T for different occupational health diseases is different due to the different mechanisms of different health diseases, so further discussion and analysis is required according to the risk category;

S2: Noise risk-Possibility of occupational noise-induced hearing loss

First, divide the working hours of a day into n time periods according to the principle of similar sound levels, use an integrating sound level meter to measure the equivalent sound level of each time period, and calculate the equivalent sound level of the whole day according to formula 2:

Where, L _Aeq,T represents the equivalent sound level throughout the day, in decibels (dB); represents the equivalent sound level in time period _Ti , in decibels (dB); T represents the total time of all time periods, in hours (h); _Ti represents the time of time period i, in hours (h); n represents the total number of time periods;

The maximum duration of exposure to noise that workers are allowed to experience each day is determined by the equivalent sound level throughout the day, as shown in Formula 3:

Where, T _max represents the exposure time limit, in hours (h); L _Aeq,T represents the equivalent sound level for the whole day, in decibels (dB); the T _max value can be calculated when the equivalent sound level in the working scene is determined;

In summary, the probability of occupational noise-induced hearing loss can be expressed by formula 4:

In the formula, L _H represents the possibility of occupational noise-induced hearing loss; t represents the exposure time to noise risk, in hours (h);

S3: High temperature risk - possibility of occupational heat stress

The possibility of occupational heat stress risk can be expressed by formula 5:

In the formula, _LT represents the possibility of occupational heat stress risk; t represents the duration of exposure to high temperature environment, in minutes (min); _TF represents the maximum continuous working time per hour for workers when the query temperature is F, in minutes (min);

S4: Radioactive risk - possibility of occupational radiation sickness

The probability of occupational radiation sickness risk can be determined by formulas 6 and 7

E＝ _ep +t×e (7)

In the formula, _LR represents the possibility of occupational radiation sickness risk; E represents the cumulative radiation dose of the worker, in millisievert (mSv); _El represents the radiation dose limit, i.e. 20mSv; _ep represents the cumulative radiation dose of the worker that year, in millisievert (mSv); t represents the time of exposure to radioactive risk, in hour; e represents the radiation amount per unit time, in millisievert/hour (mSv/hr).

3. Evaluate the severity of the consequences of risks in maintenance operations

The "quality of life" theory (QOL) is used to design a consequence severity measurement standard. The WHODAS scale is used to measure the severity of consequences. The degree of difficulty of the impact of different dimensions is represented by the Likert scale "0-4", where "0" means no difficulty; "4" means impossible to complete/extremely difficult. The severity of occupational health risk consequences C based on WHODAS can be calculated by formula 8-1.

In the formula, q is the difficulty evaluation score of the WHODAS question, which is an integer between 0 and 4, and γ is the WHODAS question number. C is converted into a percentage after calculation. The larger the C value, the greater the impact of the consequences on the quality of life, and therefore the greater the severity of the consequences brought by the risk. The smaller the C value, the smaller the severity of the consequences brought by the risk. In formula 8-1, 36 means that there are 36 questions in the WHO-DAS scale, and 144 means that the total score is 144 points (4*36).

Multiply the severity of the consequences evaluated by the probability of risk occurrence in the previous step and use Formula 9 to calculate the total occupational health risk of nuclear power:

In the formula, R _Sum represents the total occupational health risk brought about by a certain behavior, R _n represents the risk value of n risk sources, L _n represents the possibility that workers may develop occupational health diseases when exposed to n risk sources, and C _n represents the amount of decline in quality of life suffered by workers exposed to n risk sources, that is, the severity of the risk consequences of n risk sources.

Among them, nuclear power workers work continuously in high temperature environments, and are at risk of occupational heat stress such as heat stroke and heat illness. The NIOSH Work/Rest Schedule Scale published by the National Institute for Occupational Safety and Health can be used to develop sustainable work and rest time for workers exposed to heat environments, as shown in Figure 2.

The NIOSH work/rest duration measurement standard needs to be adjusted according to changes in factors such as environment, air humidity, and direct sunlight. The specific adjustment methods are as follows:

(1) Environmental factors

Direct sunlight (no clouds): Adjust work/rest times based on the temperature conditions in the work and rest schedule in Figure 2, plus 13°F of the ambient temperature.

Partly cloudy/overcast: Adjust work/rest times based on the ambient temperature plus 7°F in the work/rest schedule in Figure 2.

· In the shade/at night: No adjustments, follow the schedule in Figure 2.

(2) Air humidity

Air humidity is above 40% and below 50%: Adjust the work/rest time according to the temperature conditions of the work and rest table in Figure 2, which is 3°F higher than the ambient temperature.

Air humidity is above 50% and below 60%: Adjust the work/rest time according to the temperature conditions of the work and rest schedule in Figure 2, which is 6°F higher than the ambient temperature.

Air humidity is above 60%: Adjust the work/rest time according to the temperature conditions of the work and rest table in Figure 2, which is 9°F higher than the ambient temperature.

(3) Work Clothing

When workers wear work clothes and work in a high temperature environment, and the ambient air humidity is greater than or equal to 70%, it is necessary to adjust the work/rest time with reference to FIG. 3 .

In the possibility of risk occurrence, T is the maximum working time in this environment, which needs to be adjusted accordingly due to environmental factors, air humidity, and work clothing. Therefore, according to the above-mentioned NIOSH work/rest time measurement standard, it needs to be adjusted according to changes in factors such as environment, air humidity, and direct sunlight. The high temperature risk-occupational heat stress possibility is calculated according to the method of the present invention. The results show that the risk of high temperature risk sources for nuclear power occupational health is within a reasonable range.

4. Build a risk visualization interface

Use the canvas function in the Unity engine to draw a user interface, which should include the occurrence mechanism, value, and preventive measures of long-term occupational health risks related to the work scene and operation process. The user interface can be used to monitor the occupational health risks exposed to workers during operation in real time, remind workers of the occupational health risk level brought about by related operations, reduce the probability of workers being exposed to occupational health risks on their own, and improve their awareness of self-health and safety protection.

The contents described in this specification are merely an enumeration of implementation forms of the inventive concept, and the protection scope of the present invention should not be regarded as being limited to the specific forms described in the embodiments.

Claims (5)

1. A long-term nuclear power occupational health risk training method based on virtual reality, characterized by comprising the following steps: 1) Construct a virtual experimental scene for nuclear power occupational health and safety training, use modeling software to build a physical model, and use Unity 3D to build the virtual environment required for the experiment; 2) Conduct a "likelihood of occurrence" assessment of long-term occupational health and safety risks. By reviewing the data of the nuclear power plant's historical operating documents, identify the three main types of long-term occupational health risks, namely noise risk, high temperature risk, and radiation risk, and calculate the probability of each risk occurring; 3) Conduct a long-term occupational health and safety risk "consequence severity" assessment. Based on the severity of "reduced quality of life" caused by each risk type, use the Disability Assessment Scale (WHO-DAS) method to construct a risk consequence severity measurement scale. According to the score of the completion degree of each question in the scale, calculate the severity of occupational health risk consequences based on the WHO-DAS method. According to the probability of occurrence of each risk possibility in step 2) and the severity of the risk consequences in step 3), calculate the total occupational health risk caused by a certain behavior; 4) Construct a nuclear power occupational health risk visualization platform, that is, combine the work types, work scenarios, and production operation processes of nuclear power plant workers to design a nuclear power occupational health risk visualization platform based on virtual reality technology. 2. A long-term nuclear power occupational health risk training method based on virtual reality as claimed in claim 1, characterized in that in step 2), the specific steps of evaluating the "possibility of occurrence" of long-term occupational health and safety risks are as follows: S1: The possibility of long-term occupational health risks has the characteristics of time domain dimension. The following formula 1 calculates the possibility of occupational health risks: L＝f(t,t) (1) In the formula, L represents the probability of occurrence of occupational risk, expressed in percentage form, with the probability value ranging from 0% to 100%; t represents the exposure time of workers to this type of risk; T represents the required risk exposure time for occupational health diseases; the required risk exposure time T for different occupational health diseases is different due to the different mechanisms of different health diseases, so further discussion and analysis is required according to the risk category; S2: Noise risk-Possibility of occupational noise-induced hearing loss First, divide the working hours of a day into n time periods according to the principle of similar sound levels, use an integrating sound level meter to measure the equivalent sound level of each time period, and calculate the equivalent sound level of the whole day according to formula 2: Where, L _Aeq,T represents the equivalent sound level throughout the day, in decibels (dB); represents the equivalent sound level in time period _Ti , in decibels (dB); T represents the total time of all time periods, in hours (h); _Ti represents the time of time period i, in hours (h); n represents the total number of time periods; The maximum duration of exposure to noise that workers are allowed to experience each day is determined by the equivalent sound level throughout the day, as shown in Formula 3: Where, T _max represents the exposure time limit, in hours (h); L _Aeq,T represents the equivalent sound level for the whole day, in decibels (dB); the T _max value can be calculated when the equivalent sound level in the working scene is determined; In summary, the probability of occupational noise-induced hearing loss can be expressed by formula 4: In the formula, L _H represents the possibility of occupational noise-induced hearing loss; t represents the exposure time to noise risk, in hours (h); S3: High temperature risk - possibility of occupational heat stress The possibility of occupational heat stress risk can be expressed by formula 5: In the formula, _LT represents the possibility of occupational heat stress risk; t represents the duration of exposure to high temperature environment, in minutes (min); _TF represents the maximum continuous working time per hour for workers when the query temperature is F, in minutes (min); S4: Radioactive risk - possibility of occupational radiation sickness The probability of occupational radiation sickness risk can be determined by formulas 6 and 7 E＝ _ep +t×e (7) In the formula, _LR represents the possibility of occupational radiation sickness risk; E represents the cumulative radiation dose of the worker, in millisievert (mSv); _El represents the radiation dose limit, i.e. 20mSv; _ep represents the cumulative radiation dose of the worker that year, in millisievert (mSv); t represents the time of exposure to radioactive risk, in hour; e represents the radiation amount per unit time, in millisievert/hour (mSv/hr). 3. A long-term nuclear power occupational health risk training method based on virtual reality as claimed in claim 1, characterized in that in step 3), the specific steps of the long-term occupational health and safety risk "consequence severity" assessment are as follows: M1: Based on the severity of the reduction in the "quality of life" of personnel caused by each risk type, the WHO-DAS method is used to measure the severity of the consequences. The "0-4" Likert scale is used to characterize the difficulty of the impact of different dimensions. The difficulty increases from "0" to "4", where "0" means no difficulty; "4" means impossible to complete or extremely difficult. The severity of occupational health risk consequences C based on WHO-DAS can be calculated by formula 8; In the formula, q is the difficulty evaluation score of the WHO-DAS scale, which is an integer from 0 to 4, γ is the serial number of the WHO-DAS scale; a represents the total number of questions in the WHO-DAS scale, and b represents the total score of the WHO-DAS scale; C is converted into a percentage after calculation. The larger the C value, the greater the impact of the consequences on the quality of life, and therefore the greater the severity of the consequences brought by the risk. The smaller the C value, the smaller the severity of the consequences brought by the risk. M2: Risk fusion calculation, it is proposed that the total occupational health risk of nuclear power can be calculated using formula 9: In the formula, R _Sum represents the total occupational health risk brought about by a certain behavior, R _n represents the risk value of n risk sources, L _n represents the possibility that workers may develop occupational health diseases when exposed to n risk sources, and C _n represents the amount of decline in quality of life suffered by workers exposed to n risk sources, that is, the severity of the risk consequences of n risk sources. 4. A virtual reality-based long-term nuclear power occupational health risk training method as claimed in claim 3, characterized in that the WHO-DAS scale questions include two dimensions, namely, the understanding and communication dimension, and the action dimension; The comprehension and communication dimensions include the ability to concentrate on work, remember to do important things, analyze and solve problems every day, learn a new task, understand what others are trying to say, and start and maintain a conversation. The mobility dimension includes the degree of completion of one or more aspects of being able to stand for a long time, switching between sitting and standing positions, and being able to walk for a long time; After the testers are exposed to the corresponding risk sources, they will score the effectiveness of the completion of each question in each dimension mentioned above, which is the difficulty evaluation result of the WHO-DAS scale questions. 5. A long-term nuclear power occupational health risk training method based on virtual reality as described in claim 1, characterized in that the nuclear power occupational health risk visualization in step 4) is to construct an "occupational health risk visualization" interface related to the work scene and operation process.