JP2018067131A - Cost benefit evaluation system for risk reduction measures, cost benefit evaluation method for risk reduction measures, and cost benefit evaluation program for risk reduction measures - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cost benefit evaluation technique for risk reduction measures capable of easily deriving evaluation results.SOLUTION: An evaluation system 1 comprises: a data accepting unit 10 which accepts input data used to evaluate an atomic power plant accident; a first evaluation unit 101 which evaluates public health at the time of an accident; a second evaluation unit 102 which evaluates public health in a normal time; a third evaluation unit 103 which evaluates health of workers at the time of an accident; a fourth evaluation unit 104 which evaluates health of workers in a normal time; a fifth evaluation unit 105 which evaluates damage to off-site property; a sixth evaluation unit 106 which evaluates damage to on-site property; a seventh evaluation unit 107 which evaluates a burden on a business operator when measures are introduced; an eighth evaluation unit 108 which evaluates a burden on a business operator at the time of operation after the measures are introduced; and a data output unit 11 which outputs at least one evaluation among evaluations of the first to eighth evaluation units.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a cost benefit evaluation technique for risk reduction measures against an accident in a nuclear power plant.

  Conventionally, there is a system that performs risk-to-cost evaluation of a large-scale power plant such as a nuclear power plant and formulates a plant maintenance plan based on this evaluation.

  In addition, based on the lessons learned from the severe accident that occurred at the Fukushima Daiichi Nuclear Power Station, operators of nuclear power plants have started voluntary safety improvement efforts using probabilistic risk assessment (PRA). . This PRA quantitatively evaluates an assumed risk and is mainly divided into three levels. In Level 1 PRA, an accident scenario that leads to core damage in a nuclear power plant is identified and the frequency of occurrence of the scenario is evaluated. In Level 2 PRA, in addition to Level 1, an accident scenario in which a large amount of radioactive material diffuses from the reactor containment vessel is identified, and the thermal hydraulic power inside the reactor cooling system and the containment vessel in the accident scenario, The behavior, etc. of the radioactive materials are predicted, and the type, amount and frequency of radioactive materials released into the environment are evaluated. In Level 3PRA, in addition to Level 2, in consideration of weather conditions and the like, the transition of radioactive materials released from a nuclear power plant into the environment is predicted, and the health effects of exposure to the general public are evaluated. Based on the results of evaluation by PRA, efforts are made to improve the safety of nuclear power plants voluntarily, and the aim is to reduce risks as much as possible by actively using PRA.

JP 2003-114294 A

  Use the results of probabilistic risk assessment (PRA) to determine the legitimacy of implementing risk reduction measures in consideration of the balance between risk reduction effects and costs. Although it is useful to convert the cost and the benefit by conversion, there is a problem that the process until the evaluation result is derived is very complicated.

  Embodiments of the present invention have been made in view of such circumstances, and an object thereof is to provide a cost benefit evaluation technique for risk reduction measures that can easily derive an evaluation result.

  A cost benefit evaluation system for risk reduction measures according to an embodiment of the present invention includes a data reception unit that receives input data used for evaluation of cost benefits for risk reduction measures against an accident in a nuclear plant, and the nuclear plant based on the input data A first evaluation unit that evaluates the cost benefit of public health at the time of the accident, a second evaluation unit that evaluates the cost benefit of public health of the nuclear plant based on the input data, and A third evaluation unit that evaluates the cost benefit of occupational health at the time of the nuclear plant accident based on the input data, and the cost benefit of occupational health of the nuclear plant during the normal period based on the input data A fourth evaluation unit for performing the evaluation and the input; A fifth evaluation unit that evaluates cost benefits of off-site property damage based on data, a sixth evaluation unit that evaluates cost benefits of on-site property damage based on the input data, and The seventh evaluation unit that evaluates the cost benefit of the operator's burden at the time of introduction of the measure based on the input data, and the cost benefit of the operator's burden at the time of operation after the introduction of the measure based on the input data And a data output unit that outputs at least one of the evaluations of the first to eighth evaluation units as output data.

  The embodiment of the present invention provides a cost benefit evaluation technique for risk reduction measures that can easily derive an evaluation result.

The block diagram which shows the evaluation system of this embodiment. The figure which shows the input-output screen of 1st evaluation. The figure which shows the input-output screen of 2nd evaluation. The figure which shows the input-output screen of 3rd evaluation. The figure which shows the input-output screen of 4th evaluation. The figure which shows the input / output screen of 5th evaluation. The figure which shows the input-output screen of 6th evaluation. The figure which shows the input-output screen of 7th evaluation. The figure which shows the input-output screen of 8th evaluation. The figure which shows the summary screen of a cost benefit evaluation result. The flowchart which shows the evaluation method of this embodiment. The flowchart which shows the evaluation method of this embodiment. The flowchart which shows the evaluation method of this embodiment. The flowchart which shows the evaluation method of this embodiment.

  Hereinafter, this embodiment is described based on an accompanying drawing. Reference numeral 1 in FIG. 1 is a cost benefit evaluation system (hereinafter referred to as an evaluation system) for risk reduction measures against an accident in a nuclear power plant. In addition, the nuclear power plant of this embodiment illustrates a nuclear power plant.

  When an accident occurs in a nuclear power plant, a large amount of radioactive material diffuses, causing a large economic loss. Various risk reduction measures are taken to avoid such risks. However, the probability of an accident occurring is very low, and excessive risk countermeasures may increase costs. Therefore, the evaluation system 1 of the present embodiment evaluates the cost benefit by converting the risk reduction effect of the risk reduction measure into a monetary value.

  Note that the evaluation system 1 of the present embodiment has hardware resources such as a CPU, ROM, RAM, and HDD, and information processing by software is realized using hardware resources when the CPU executes various programs. Computer.

  As shown in FIG. 1, the evaluation system 1 according to the present embodiment includes a communication unit 2 that is connected to a network 500 such as the Internet or an intranet and can communicate with other computers, a keyboard, a mouse, and the like. It is composed of an input unit 3 for inputting various input data, a monitor and the like, a display unit 4 for displaying input data and output data, a printer 5 for printing out input data and output data, and a processor. An information processing unit 6, a program storage unit 7 for storing various programs executed by the information processing unit 6, an evaluation data storage unit 8 for storing input data and output data used for cost benefit evaluation, and evaluation in the past A past data storage unit 9 for storing various data performed .

  The various input data may be input from another computer via the communication unit 2. When input data is input, it is stored in the evaluation data storage unit 8. The output data calculated based on the input data is also stored in the evaluation data storage unit 8. When a series of evaluation processes is completed, input data and output data are stored in the past data storage unit 9 in association with the date and time when these processes were performed. Various data may be stored in the past data storage unit 9 in association with a user name that can identify each user.

  The information processing unit 6 includes a data receiving unit 10 that receives input data via the communication unit 2 and the input unit 3, and a data output unit that outputs output data that is an evaluation result via the display unit 4 and the printer 5. 11, a discount rate determination unit 12 that determines whether the value of the discount rate included in the input data is 0, and a total calculation unit 13 that calculates the total value of the evaluation.

  The information processing unit 6 further includes a first evaluation unit 101 that evaluates the cost benefit of public health at the time of the nuclear plant accident based on the first input data, and a normal operation of the nuclear plant based on the second input data. A second evaluation unit 102 that evaluates the cost benefit of public health of the public, a third evaluation unit 103 that evaluates the cost benefit of the occupational health at the time of the nuclear plant accident based on the third input data, A fourth evaluation unit 104 that evaluates the cost benefits of normal occupational health of the nuclear power plant based on the fourth input data, and an evaluation of cost benefits of off-site property damage based on the fifth input data And a cost evaluation for damages of on-site property based on the sixth input data. A sixth evaluation unit 106 that evaluates the fit, a seventh evaluation unit 107 that evaluates the cost benefit of the burden of the operator when the countermeasure is introduced based on the seventh input data, and a countermeasure based on the eighth input data And an eighth evaluator 108 that evaluates the cost benefit of the burden on the operator during operation after introduction.

  When the user of the evaluation system 1 inputs various types of input data according to the screens displayed on the display unit 4 (see FIGS. 2 to 9), the information processing unit 6 performs cost benefit evaluation based on the input data. . The evaluation result is displayed on the screen as output data.

  The program storage unit 7 stores the first to eighth evaluation programs corresponding to the respective mathematical formulas for calculating the first to eighth output data.

  In the following description, “public” refers to residents living around the nuclear power plant. The “professional person” refers to a worker who provides labor at a nuclear power plant. In addition, “operator” refers to a company such as an electric power company that operates a nuclear power plant, a local government, or the like.

  “On-site” refers to an area where a nuclear power plant is installed. In addition, “offsite” is an area around the nuclear power plant, and indicates an area within a predetermined radius around the nuclear power plant. The off-site range may be a range of 30 km radius around the nuclear power plant, or a range of 80 km radius.

  An “accident” is an accident in which radioactive material flows out from a nuclear power plant. The “facility” refers to a facility related to a nuclear power plant. A “radiation field” is a place in a nuclear power plant where a worker may be exposed to a specific amount of radiation.

  In addition, the “mental damage cost” is a cost calculated based on a compensation amount paid by an operator to residents living in the vicinity of the nuclear power plant. Mental damage refers to mental damage that residents incur when evacuating from their place of residence. Mental damage includes not only damage when evacuating, but also damage when continuing to live in an evacuation destination. That is, the amount of damage increases according to the evacuation period and the distance from the home to the evacuation destination. It also includes mental damage if your home is radioactively contaminated.

  The “planned evacuees” are residents who are designated as evacuation areas and are required to leave. An evacuation area is an area where the government requires residents to leave for evacuation in the event of a nuclear plant accident. For example, a region within a predetermined radius centered on the nuclear power plant and a region where the radiation dose is high even outside this region are included. In addition, a region with a high radiation dose is a region in which if the inhabitants continue to live, the annual integrated value of the radiation dose to which the inhabitants are exposed may reach a predetermined value (for example, 20 mSv). .

  The “discount rate” is a value that is used when converting future profits and future value of the target to present value, and converting the future value to present value. . The present value is obtained by discounting the value generated in the future using a discounted interest rate or the like to restore the present value. For example, if the yield is taken into consideration, the value of the current currency is different from the value of the future currency, so the discount rate is used to convert the value of the future currency into the value of the current currency. Further, for example, if the monetary value is unchanged, the interest rate becomes a discount rate, but this discount rate may include elements other than the interest rate.

  Note that the discount rate included in each input data of the present embodiment is input in units of%, but when applying to “r” in the following formulas, the unit of% is converted into a ratio. For example, when the discount rate is input as 10%, r = 0.1. The unit of monetary value is exemplified by Japanese yen (\). In this embodiment, the unit of monetary value is exemplified as Japanese yen (\), but other currency units and auxiliary units may be used.

As shown in FIG. 2, the first input data received by the data receiving unit 10 in order to evaluate the cost benefit of public health in the event of a nuclear power plant accident is:
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
Collective dose coefficient before risk reduction measures,
Collective dose coefficient after risk reduction measures,
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
including.

  Further, the first evaluation unit 101 uses the following formula 1 (first type formula) as the first output data for the discounted monetary value of the risk that the public health was avoided at the time of the nuclear plant accident. To calculate.

here,
_VPHA is the discounted monetary value (unit: \) of the avoided risk of public health in the event of a nuclear plant accident,
F _S, the accident frequency of occurrence of the previous risk reduction measures (units, event / facility-year),
F _A, the accident frequency of risk-reduction measures (units, event / facility-year),
P _S is, the collective dose coefficients before risk reduction measures (units, people -rem / event),
P _A is, the collective dose coefficient of risk-reduction measures (units, people -rem / event),
R is the monetary value per unit dose (unit is \ / person-rem),
t _f is the number of years remaining until the end of the life of the facility (in years),
t _i is the number of years before the facility begins operation (unit is year, 0 is entered if the facility is already in operation),
r is the discount rate (the value entered in% and converted into a ratio),
N is the number of facilities affected by risk reduction measures (in units),
It is.

  Note that, when the discount rate is not taken into consideration (that is, r = 0), the first evaluation unit 101 calculates the first output data using the following formula 2 (the second type of formula).

  As shown in FIG. 2, on the first evaluation input / output screen 111 displayed on the display unit 4, the user inputs each item 112 of the first input data and a numerical value corresponding to each of these items 112. A numerical value input unit 113 is provided. When the predetermined item 112 is not considered, 0 may be input to the corresponding numerical value input unit 113.

  Further, the first evaluation input / output screen 111 is provided with a first output data item 114 and a numerical value output unit 115 on which a numerical value corresponding to the item 114 is displayed. The numerical value (evaluation result) calculated by the first evaluation unit 101 based on the first input data is displayed on the numerical value output unit 115. The first input data and the first output data may be printed out using the printer 5.

As shown in FIG. 3, the second input data received by the data receiving unit 10 in order to evaluate the cost benefit of public health at the normal time of the nuclear power plant is
Reduction of the collective dose during normal times at the time of introduction of risk reduction measures at each facility,
Annual reduction of collective dose during normal operation after the introduction of risk reduction measures,
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
including.

  Further, the second evaluation unit 102 uses the following formula 3 (the first type of formula) as the second output data for the monetary value after discounting the risk of avoiding the public health of the nuclear power plant during normal times. To calculate.

here,
V _PHR is the discounted monetary value (in units of \) of the avoided risk of normal public health of the nuclear plant,
D _PRI is the reduction of collective dose at each facility at the time of introduction of risk reduction measures (unit: person-rem / facility),
D _PRO is the annual reduction of the collective dose during normal operation after the introduction of risk reduction measures (unit: person-rem / facility-year),
R is the monetary value per unit dose (unit is \ / person-rem),
t _f is the number of years remaining until the end of the life of the facility (in years),
t _i is the number of years before the facility begins operation (unit is year, 0 is entered if the facility is already in operation),
r is the discount rate (the value entered in% and converted into a ratio),
N is the number of facilities affected by risk reduction measures (in units),
It is.

  When the discount rate is not considered (that is, r = 0), the second evaluation unit 102 calculates the second output data using the following formula 4 (second type formula).

  As shown in FIG. 3, on the second evaluation input / output screen 121 displayed on the display unit 4, the user inputs each item 122 of the second input data and a numerical value corresponding to each of these items 122. A numerical value input unit 123 is provided. If the predetermined item 122 is not considered, 0 may be input to the corresponding numerical value input unit 123.

  Further, the second evaluation input / output screen 121 is provided with a second output data item 124 and a numerical value output unit 125 on which a numerical value corresponding to this item 124 is displayed. The numerical value (evaluation result) calculated by the second evaluation unit 102 based on the second input data is displayed on the numerical value output unit 125. The second input data and the second output data may be printed out using the printer 5.

As shown in FIG. 4, the third input data received by the data receiving unit 10 in order to evaluate the cost benefit of occupational health at the time of an accident at a nuclear power plant is:
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
Exposure dose at the early stage of the accident before risk reduction measures,
Exposure dose at the early stage of the accident after risk reduction measures,
Exposure dose in the long-term stage of the accident before risk reduction measures,
Exposure dose in the long-term stage of the accident after risk reduction measures,
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
The period of long-term exposure before risk reduction measures;
The period of long-term exposure after risk reduction measures;
Discount rate,
The number of facilities affected by risk reduction measures,
including.

  Further, the third evaluation unit 103 calculates the discounted monetary value of the risk of the occupational health at the time of the nuclear plant accident as the third output data by using the following formula 5 (first formula). Use to calculate.

here,
V _OHA is the discounted monetary value (unit: \) of the avoided risk of occupational health in the event of a nuclear plant accident,
F _S, the accident frequency of occurrence of the previous risk reduction measures (units, event / facility-year),
F _A, the accident frequency of risk-reduction measures (units, event / facility-year),
D _IOS is the exposure dose (unit: person-rem / event) at the early stage of the accident before risk reduction measures,
D _IOA is, exposure dose in the early stages at the time of the accident after the risk reduction measures (units, people -rem / event),
D _LTOS is the exposure dose (unit: person-rem / event) in the long-term stage during an accident before risk reduction measures,
_DLTOA is the exposure dose in the long-term stage after an accident after risk reduction measures (unit: person-rem / event),
R is the monetary value per unit dose (unit is \ / person-rem),
t _f is the number of years remaining until the end of the life of the facility (in years),
t _i is the number of years before the facility begins operation (unit is year, 0 is entered if the facility is already in operation),
_ms is the period (unit: years) during which long-term exposure occurs before risk reduction measures,
m _A is the period (unit: years) in which long-term exposure occurs after risk reduction measures,
r is the discount rate (the value entered in% and converted into a ratio),
N is the number of facilities affected by risk reduction measures (in units),
It is.

  When the discount rate is not taken into consideration (that is, r = 0), the third evaluation unit 103 calculates the third output data using the following formula 6 (second type formula).

  As shown in FIG. 4, on the third evaluation input / output screen 131 displayed on the display unit 4, the user inputs each item 132 of the third input data and a numerical value corresponding to each of these items 132. A numerical value input unit 133 is provided. When the predetermined item 132 is not considered, 0 may be input to the corresponding numerical value input unit 133.

  The third evaluation input / output screen 131 is provided with a third output data item 134 and a numerical value output unit 135 on which a numerical value corresponding to the item 134 is displayed. The numerical value (evaluation result) calculated by the third evaluation unit 103 based on the third input data is displayed on the numerical value output unit 135. Note that the third input data and the third output data may be printed out using the printer 5.

As shown in FIG. 5, the fourth input data received by the data receiving unit 10 in order to evaluate the cost benefit of the occupational health of a nuclear plant during normal times is
Exposure dose per unit time in the radiation field before risk reduction measures;
Exposure dose per unit time in the radiation field after risk reduction measures;
The workforce required for work when introducing risk reduction measures,
Labor force required for work during operation before risk reduction measures,
Labor force required for work during operation after risk reduction measures,
The number of operations per year during operation prior to risk reduction measures;
The number of operations per year during operation after risk reduction measures;
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
including.

  Further, the fourth evaluation unit 104 calculates the following monetary value after the discounted risk of the occupational health of the nuclear power plant as the fourth output data is calculated by the following formula 7 (first type formula). Use to calculate.

here,
V _OHR is the discounted monetary value (in units of \) of the avoided risk of normal occupational health of nuclear power plants,
_FRS is the exposure dose per unit time (unit: rem / hour) in the radiation field before risk reduction measures.
_FRA is the exposure dose per unit time in the radiation field after risk reduction measures (unit: rem / hour),
W _I is, the labor force required to work at the time of the introduction of risk reduction measures (units, labor-hours / facility),
W _OS is the labor force (unit: labor-hours / facility-activities) required for work during operation before risk reduction measures,
_WOA is the labor force (unit: labor-hours / facility-activities) required for operations during risk reduction measures.
A _FS is the number of operations per year during operation before risk reduction measures (unit: activities / year),
A _FA is the number of operations per year during operation after risk reduction measures (unit: activities / year),
R is the monetary value per unit dose (unit is \ / person-rem),
t _f is the number of years remaining until the end of the life of the facility (in years),
t _i is the number of years before the facility begins operation (unit is year, 0 is entered if the facility is already in operation),
r is the discount rate (the value entered in% and converted into a ratio),
N is the number of facilities affected by risk reduction measures (in units),
It is.

  When the discount rate is not considered (that is, r = 0), the fourth evaluation unit 104 calculates the fourth output data using the following formula 8 (second type formula).

  As shown in FIG. 5, on the fourth evaluation input / output screen 141 displayed on the display unit 4, the user inputs each item 142 of the fourth input data and a numerical value corresponding to each of these items 142. And a numerical value input unit 143 is provided. If the predetermined item 142 is not considered, 0 may be input to the corresponding numerical value input unit 143.

  The fourth evaluation input / output screen 141 is provided with a fourth output data item 144 and a numerical value output unit 145 for displaying a numerical value corresponding to the item 144. The numerical value (evaluation result) calculated by the fourth evaluation unit 104 based on the fourth input data is displayed on the numerical value output unit 145. The fourth input data and the fourth output data may be printed out using the printer 5.

As shown in FIG. 6, the fifth input data received by the data receiving unit 10 to evaluate the cost benefit of off-site property damage is:
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
Cost before evacuation of total of evacuation cost and relocation cost, land and property acquisition cost, decontamination cost and contaminated crop disposal cost before risk reduction measures,
Costs before discounting the total of evacuation costs and relocation costs, land and property acquisition costs, decontamination costs, and contaminated crop disposal costs after risk reduction measures,
Planned number of evacuees before risk reduction measures,
Planned number of evacuees after risk reduction measures,
The cost of mental damage per planned evacuee,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
including.

  Further, the fifth evaluation unit 105 calculates the monetary value of the avoided damage of the off-site property as the fifth output data using the following formula 9 (first type formula).

here,
_VFP is the monetary value (in units of \) of avoided damage of off-site property,
F _S, the accident frequency of occurrence of the previous risk reduction measures (units, event / facility-year),
F _A, the accident frequency of risk-reduction measures (units, event / facility-year),
B _S, the cost of the undiscounted total of takeover costs and decontamination costs and pollution crops disposal costs of relocation costs and land and property and evacuation costs of the previous risk reduction measures (units, \),
B _A is the undiscounted cost (unit: \) of the total of the evacuation cost, relocation cost, land and property acquisition cost, decontamination cost, and contaminated crop disposal cost after risk reduction measures,
L _S is the planned number of evacuees (unit is person) before risk reduction measures,
L _A is, deliberate evacuation The number of risk-reduction measures (unit, person),
Q is the cost of mental damage per planned evacuee (unit is \ / person),
t _f is the number of years remaining until the end of the life of the facility (in years),
t _i is the number of years before the facility begins operation (unit is year, 0 is entered if the facility is already in operation),
r is the discount rate (the value entered in% and converted into a ratio),
N is the number of facilities affected by risk reduction measures (in units),
It is.

  In addition, the next term (Formula 10) in Formula 9 is a term regarding the mental damage cost that has not been included in the conventional evaluation.

  When the discount rate is not considered (that is, r = 0), the fifth evaluation unit 105 calculates the fifth output data using the following formula 11 (second type formula).

  As shown in FIG. 6, on the fifth evaluation input / output screen 151 displayed on the display unit 4, the user inputs each item 152 of the fifth input data and a numerical value corresponding to each of these items 152. A numerical value input unit 153 is provided. If the predetermined item 152 is not considered, 0 may be input to the corresponding numerical value input unit 153.

  The fifth evaluation input / output screen 151 is provided with a fifth output data item 154 and a numerical value output unit 155 for displaying a numerical value corresponding to the item 154. The numerical value (evaluation result) calculated by the fifth evaluation unit 105 based on the fifth input data is displayed on the numerical value output unit 155. Note that the fifth input data and the fifth output data may be printed out using the printer 5.

As shown in FIG. 7, the sixth input data received by the data receiving unit 10 in order to evaluate the cost benefit of on-site property damage is:
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
The total cost of decontamination before discount in a single accident before risk reduction measures,
Total cost of decontamination before discount in one accident after risk reduction measures,
The number of years required to return the site before the risk reduction measures to the state before the accident (period of decontamination)
The number of years it takes to return the site after the risk reduction measures to the state before the accident (period of decontamination),
Discount rate,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Alternative power generation costs,
Alternative energy per year from a single accident,
The number of facilities affected by risk reduction measures,
including.

  The sixth evaluation unit 106 calculates the monetary value of the avoided damage of the on-site property as the sixth output data by using the following formula 12 (first type formula).

here,
V _OP is the monetary value (in units of \) of the avoided damage of on-site property,
F _S, the accident frequency of occurrence of the previous risk reduction measures (units, event / facility-year),
F _A, the accident frequency of risk-reduction measures (units, event / facility-year),
_CCDS is the total cost of decontamination before discount in a single accident before risk reduction measures (unit: \),
_CCDA is the total cost of decontamination before discount in a single accident after risk reduction measures (unit: \),
m _S is the number of years required to return the site before risk reduction measures to the state before the accident (period of decontamination, units are years),
m _A is the number of years required to return the site after risk reduction measures to the pre-accident state (period of decontamination, units are years),
r is the discount rate (the value entered in% and converted into a ratio),
t _f is the number of years remaining until the end of the life of the facility (in years),
t _i is the number of years before the facility begins operation (unit is year, 0 is entered if the facility is already in operation),
_CG is the power generation cost of alternative power (unit is \ / kWh),
P _G is an alternative power per year by accident once (in, kWh / year),
N is the number of facilities affected by risk reduction measures (in units),
It is.

  When the discount rate is not considered (that is, r = 0), the sixth evaluation unit 106 calculates the sixth output data using the following formula 13 (second type formula).

  As shown in FIG. 7, on the sixth evaluation input / output screen 161 displayed on the display unit 4, the user inputs each item 162 of the sixth input data and a numerical value corresponding to each of these items 162. A numerical value input unit 163 is provided. If the predetermined item 162 is not considered, 0 may be input to the corresponding numerical value input unit 163.

  Further, the sixth evaluation input / output screen 161 is provided with a sixth output data item 164 and a numerical value output unit 165 for displaying a numerical value corresponding to the item 164. The numerical value (evaluation result) calculated by the sixth evaluation unit 106 based on the sixth input data is displayed on the numerical value output unit 165. Note that the sixth input data and the sixth output data may be printed out using the printer 5.

As shown in FIG. 8, the seventh input data received by the data receiving unit 10 in order to evaluate the cost benefit of the burden on the operator at the time of introduction of the countermeasure is
Equipment costs and
Labor costs for construction,
Others,
including.

  In addition, the seventh evaluation unit 107 calculates the burden on the operator when introducing the risk reduction measures as the seventh output data using the following formula 14 (first type formula).

here,
V _II is the burden on the operator when the risk reduction measures are introduced (unit: \),
K _IIE is the cost of equipment (unit is \),
K _IIC is the construction labor cost (unit: \),
_KIIO is other (unit is \),
It is.

  As shown in FIG. 8, on the seventh evaluation input / output screen 171 displayed on the display unit 4, the user inputs each item 172 of the seventh input data and a numerical value corresponding to each of these items 172. A numerical value input unit 173 is provided. When the predetermined item 172 is not considered, 0 may be input to the corresponding numerical value input unit 173.

  Further, the seventh evaluation input / output screen 171 is provided with a seventh output data item 174 and a numerical value output unit 175 for displaying a numerical value corresponding to the item 174. The numerical value (evaluation result) calculated by the seventh evaluation unit 107 based on the seventh input data is displayed on the numerical value output unit 175. Note that the seventh input data and the seventh output data may be printed out using the printer 5.

As shown in FIG. 9, the eighth input data received by the data receiving unit 10 in order to evaluate the cost benefit of the burden on the operator at the time of driving after the introduction of the countermeasure is:
The undiscounted value of additional costs per year imposed on operators during operation after the introduction of risk reduction measures;
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
including.

  In addition, the eighth evaluation unit 108 calculates the present value of the burden on the operator at the time of driving after the introduction of the risk reduction measure as the eighth output data using the following formula 15 (first type formula). .

here,
_VIO is the present value of the operator's burden during operation after the introduction of risk reduction measures (unit: \),
_KIO is the value before discounting the additional cost per year that is imposed on operators during operation after the introduction of risk reduction measures (unit: \),
t _f is the number of years remaining until the end of the life of the facility (in years),
t _i is the number of years before the facility begins operation (unit is year, 0 is entered if the facility is already in operation),
r is the discount rate (the value entered in% and converted into a ratio),
It is.

  When the discount rate is not considered (that is, r = 0), the eighth evaluation unit 108 calculates the eighth output data using the following formula 16 (second type formula).

  As shown in FIG. 9, on the input / output screen 181 for the eighth evaluation displayed on the display unit 4, the user inputs each item 182 of the eighth input data and a numerical value corresponding to each of these items 182. A numerical value input unit 183 is provided. When the predetermined item 182 is not considered, 0 may be input to the corresponding numerical value input unit 183.

  The eighth evaluation input / output screen 181 is provided with an eighth output data item 184 and a numerical value output unit 185 for displaying a numerical value corresponding to the item 184. The numerical value (evaluation result) calculated by the eighth evaluation unit 108 based on the eighth input data is displayed on the numerical value output unit 185. Note that the eighth input data and the eighth output data may be printed out using the printer 5.

  The total calculation unit 13 calculates a total value obtained by summing up the numerical values (evaluations) of the first to eighth output data after calculating the first to eighth output data. The total value is a value obtained by adding the numerical values of the first to eighth output data. Then, a cost benefit evaluation result summary screen 191 is displayed.

  As shown in FIG. 10, the cost benefit evaluation result summary screen 191 includes a risk reduction measure name item 192 and a character input unit 193 for the user to input the risk reduction measure name in this item 192. It is done.

  Further, on the cost benefit evaluation result summary screen 191, each item 194 of the first to eighth output data, which is a factor of cost benefit, and a present value estimated value that is a numerical value corresponding to each of these items 194 are displayed. A numerical value output unit 195, an item 196 indicating a total value obtained by summing up the numerical values of the first to eighth output data, and a total value output unit 197 for displaying the total value. The cost benefit evaluation result summary screen 191 may be printed out using the printer 5. In this way, the user of the evaluation system 1 can grasp the output data calculated by the evaluation units 101 to 108 and the total value thereof in an integrated manner.

  The knowledge of the accident at the Fukushima Daiichi nuclear power plant shows that the contribution of mental damage costs is also significant. Therefore, in this embodiment, by including the mental damage cost in the input data, it is possible to perform an evaluation in consideration of the mental damage cost that was not included in the evaluation in the conventional cost benefit evaluation system.

  Next, cost benefit evaluation processing for risk reduction measures executed by the evaluation system 1 of the present embodiment will be described with reference to FIGS. 11 to 14. In the description of each step in the flowchart, for example, a portion described as “Step S11” is abbreviated as “S11”.

  As illustrated in FIG. 11, first, the data receiving unit 10 receives first input data input via the input unit 3 or the like (S11). Next, the discount rate determination unit 12 determines whether or not the discount rate value included in the first input data is 0 (S12). Here, when the value of the discount rate is not 0, the first evaluation unit 101 evaluates the first input data using Equation 1 described above (S13). On the other hand, when the value of the discount rate is 0, the first evaluation unit 101 evaluates the first input data using Equation 2 described above (S14). Next, the data output unit 11 outputs the first output data evaluated (calculated) based on the first input data using the display unit 4 or the like (S15).

  Next, the data receiving unit 10 receives second input data input via the input unit 3 or the like (S16). Next, the discount rate determination unit 12 determines whether or not the discount rate value included in the second input data is 0 (S17). Here, when the value of the discount rate is not 0, the second evaluation unit 102 evaluates the second input data using Equation 3 described above (S18). On the other hand, when the value of the discount rate is 0, the second evaluation unit 102 evaluates the second input data using Equation 4 described above (S19). Next, the data output unit 11 outputs the second output data evaluated (calculated) based on the second input data using the display unit 4 or the like (S20).

  As shown in FIG. 12, the data receiving unit 10 receives third input data input via the input unit 3 or the like (S21). Next, the discount rate determination unit 12 determines whether or not the discount rate value included in the third input data is 0 (S22). Here, when the value of the discount rate is not 0, the third evaluation unit 103 evaluates the third input data using Equation 5 described above (S23). On the other hand, when the value of the discount rate is 0, the third evaluation unit 103 evaluates the third input data using Equation 6 described above (S24). Next, the data output unit 11 outputs the third output data evaluated (calculated) based on the third input data using the display unit 4 or the like (S25).

  Next, the data receiving unit 10 receives fourth input data input via the input unit 3 or the like (S26). Next, the discount rate determination unit 12 determines whether or not the discount rate value included in the fourth input data is 0 (S27). Here, when the value of the discount rate is not 0, the fourth evaluation unit 104 evaluates the fourth input data using Equation 7 described above (S28). On the other hand, when the value of the discount rate is 0, the fourth evaluation unit 104 evaluates the fourth input data using Equation 8 described above (S29). Next, the data output part 11 outputs the 4th output data evaluated (calculated) based on 4th input data using the display part 4 etc. (S30).

  As shown in FIG. 13, the data receiving unit 10 receives fifth input data input via the input unit 3 or the like (S31). Next, the discount rate determination unit 12 determines whether or not the value of the discount rate included in the fifth input data is 0 (S32). Here, when the value of the discount rate is not 0, the fifth evaluation unit 105 evaluates the fifth input data using Equation 9 described above (S33). On the other hand, when the value of the discount rate is 0, the fifth evaluation unit 105 evaluates the fifth input data using Equation 11 described above (S34). Next, the data output unit 11 outputs the fifth output data evaluated (calculated) based on the fifth input data using the display unit 4 or the like (S35).

  Next, the data receiving unit 10 receives sixth input data input via the input unit 3 or the like (S36). Next, the discount rate determination unit 12 determines whether or not the discount rate value included in the sixth input data is 0 (S37). Here, when the value of the discount rate is not 0, the sixth evaluation unit 106 evaluates the sixth input data using the above-described equation 12 (S38). On the other hand, when the value of the discount rate is 0, the sixth evaluation unit 106 evaluates the sixth input data using the above-described equation 13 (S39). Next, the data output part 11 outputs the 6th output data evaluated (calculated) based on 6th input data using the display part 4 etc. (S40).

  As shown in FIG. 14, the data receiving unit 10 receives seventh input data input via the input unit 3 or the like (S41). Next, the seventh evaluation unit 107 evaluates the seventh input data using the above-described equation 14 (S42). Next, the data output unit 11 outputs the seventh output data evaluated (calculated) based on the seventh input data using the display unit 4 or the like (S43).

  Next, the data receiving unit 10 receives the eighth input data input via the input unit 3 or the like (S44). Next, the discount rate determination unit 12 determines whether or not the value of the discount rate included in the eighth input data is 0 (S45). Here, when the value of the discount rate is not 0, the eighth evaluation unit 108 evaluates the eighth input data using the above-described equation 15 (S46). On the other hand, when the value of the discount rate is 0, the eighth evaluation unit 108 evaluates the eighth input data using the above-described equation 16 (S47). Next, the data output unit 11 outputs the eighth output data evaluated (calculated) based on the eighth input data using the display unit 4 or the like (S48).

  Next, the data receiving unit 10 receives a risk reduction measure name input via the input unit 3 or the like (S49). Next, the total calculation unit 13 calculates a total value obtained by summing up the numerical values (evaluations) of the first to eighth output data (S50). Next, the data output unit 11 outputs the risk reduction measure name using the display unit 4 and the like, and outputs the calculated total value using the display unit 4 and the like (S51). Then, the evaluation process ends.

  Each of the evaluation units 101 to 108 performs an evaluation using the first type formula when the discount rate value determined by the discount rate determination unit 12 is not 0, and when the discount rate value is 0. Evaluation is performed using the second type of mathematical expression. In this way, it is possible to perform two kinds of evaluations, that is, evaluation that considers the discount rate and evaluation that does not consider the discount rate.

  Note that the data considered in the conventional evaluation method includes data that cannot be quantified, is easily influenced by the subjectivity of the person performing the evaluation, and can obtain an evaluation result that objectively reflects the actual situation. There wasn't. However, in the evaluation system 1 of the present embodiment, an evaluation result in which the actual situation is objectively reflected can be obtained by performing an evaluation using quantifiable data.

  Note that the program executed by the evaluation system 1 of the present embodiment is provided by being incorporated in advance in a ROM (program storage unit 7) or the like. Alternatively, this program is stored in a computer-readable storage medium such as a CD-ROM, CD-R, memory card, DVD, or flexible disk (FD) as an installable or executable file. You may make it do.

  The program executed by the evaluation system 1 may be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network. In addition, the evaluation system 1 can also be configured by combining separate modules that perform each function of the components independently by connecting to each other via a network or a dedicated line.

  According to the embodiment described above, the evaluation result can be easily derived by having the first to eighth evaluation units.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Evaluation system, 2 ... Communication part, 3 ... Input part, 4 ... Display part, 5 ... Printer, 6 ... Information processing part, 7 ... Program storage part, 8 ... Evaluation data storage part, 9 ... Past data storage part, DESCRIPTION OF SYMBOLS 10 ... Data reception part, 11 ... Data output part, 12 ... Discount rate determination part, 13 ... Total calculation part, 101 ... 1st evaluation part, 102 ... 2nd evaluation part, 103 ... 3rd evaluation part, 104 ... 4th Evaluation unit, 105 ... fifth evaluation unit, 106 ... sixth evaluation unit, 107 ... seventh evaluation unit, 108 ... eighth evaluation unit, 111 ... input / output screen of the first evaluation, 112 ... items of the first input data, 113: Numerical input unit of first input data, 114: Item of first output data, 115: Numerical output unit of first output data, 121: Input / output screen of second evaluation, 122: Input / output screen of second input data Item, 123 ... second input Numerical value input unit of data 124, item of second output data, 125 Numerical value output unit of second output data 131 131 Input / output screen of third evaluation 132 132 Item of third input data 133 Numerical input part of third input data, 134 ... third output data item, 135 ... third output data numerical output part, 141 ... fourth evaluation input / output screen, 142 ... fourth input data item, 143... 4th input data numerical input section, 144... 4th output data item, 145. 4th output data numerical output section, 151... 5th input / output screen, 152. Item: 153... Numerical input portion of fifth input data, 154... Item of fifth output data, 155... Numerical output of fifth output data. , 161 ... sixth input / output screen, 162 ... sixth input data item, 163 ... sixth input data numerical input unit, 164 ... sixth output data item, 165 ... sixth output data item Numerical value output unit, 171 ... seventh input / output screen, 172 ... seventh input data item, 173 ... seventh input data numerical input unit, 174 ... seventh output data item, 175 ... seventh output Numerical value output section of data, 181... Input / output screen of eighth evaluation, 182... Item of eighth input data, 183... Numeric input section of eighth input data, 184. Numerical output part of output data, 191 ... summary screen, 192 ... item of risk reduction measure name, 193 ... character input part, 194 ... output Data item, 195... Numerical value output unit, 196... Item indicating total value, 197... Total value output unit, 500.

Claims (15)

A data reception unit that receives input data used for evaluating the cost benefit of risk reduction measures for nuclear plant accidents;
A first evaluation unit that evaluates cost benefits of public health at the time of the nuclear plant accident based on the input data;
A second evaluator for evaluating cost benefits of public health during normal times of the nuclear power plant based on the input data;
A third evaluation unit that evaluates the cost benefits of occupational health at the time of the nuclear plant accident based on the input data;
A fourth evaluation unit that evaluates the cost benefit of the occupational health of the nuclear power plant based on the input data;
A fifth evaluation unit that evaluates cost benefits of off-site property damage based on the input data;
A sixth evaluation unit that evaluates the cost benefit of on-site property damage based on the input data;
A seventh evaluation unit that evaluates the cost benefit of the burden on the operator at the time of introduction of the countermeasure based on the input data;
An eighth evaluation unit that evaluates the cost benefit of the burden on the operator at the time of driving after the introduction of measures based on the input data;
A data output unit for outputting at least one of the evaluations of the first to eighth evaluation units as output data;
Cost benefit evaluation system for risk reduction measures characterized by comprising The input data includes mental damage costs,
The cost benefit evaluation system for risk reduction measures according to claim 1, wherein the fifth evaluation unit performs an evaluation based on the mental damage cost. The input data is
Planned number of evacuees before risk reduction measures,
Planned number of evacuees after risk reduction measures,
The cost of mental damage per planned evacuee,
Including
The fifth evaluation unit is
The number of planned evacuees before the risk reduction measures,
The planned number of evacuees after the risk reduction measures,
The mental damage cost per planned evacuee,
The cost-benefit evaluation system for risk reduction measures according to claim 2. The input data is
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
Cost before evacuation of total of evacuation cost and relocation cost, land and property acquisition cost, decontamination cost and contaminated crop disposal cost before risk reduction measures,
Costs before discounting the total of evacuation costs and relocation costs, land and property acquisition costs, decontamination costs, and contaminated crop disposal costs after risk reduction measures,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
Including
The cost benefit evaluation system for risk reduction measures according to claim 3, wherein the fifth evaluation unit calculates the monetary value of the avoided damage of the off-site property as the output data using the following equation.

here,
_VFP is the monetary value of avoided damage to off-site property,
F _S, the accident frequency of occurrence of the previous risk reduction measures,
F _A, the accident frequency of risk-reduction measures,
B _S is, takeover costs and decontamination costs and the total cost of the previous discount of pollution crops disposal cost of relocation costs and land and property and evacuation costs of the previous risk reduction measures,
B _A is the pre-discount cost of the total of the evacuation cost, relocation cost, land and property acquisition cost, decontamination cost, and contaminated crop disposal cost after risk reduction measures,
L _S is the planned number of evacuees before risk reduction measures,
L _A is, deliberate evacuation The number of risk-reduction measures,
Q is the cost of mental damage per planned evacuee,
t _f is the number of years left until the end of the life of the facility,
t _i is the number of years before the facility starts operation,
r is the discount rate,
N is the number of facilities affected by risk reduction measures,
It is. The input data is
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
Collective dose coefficient before risk reduction measures,
Collective dose coefficient after risk reduction measures,
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
Including
The first evaluation unit calculates a discounted monetary value of a risk that is avoided in public health at the time of an accident of a nuclear power plant as the output data, using the following formula: A cost benefit evaluation system for risk reduction measures as described in any one of the items.

here,
V _PHA is the discounted monetary value of the avoided risk of public health in the event of a nuclear plant accident,
F _S, the accident frequency of occurrence of the previous risk reduction measures,
F _A, the accident frequency of risk-reduction measures,
P _S is, the collective dose coefficients before risk reduction measures,
P _A is, the collective dose coefficient of risk-reduction measures,
R is the monetary value per unit dose,
t _f is the number of years left until the end of the life of the facility,
t _i is the number of years before the facility starts operation,
r is the discount rate,
N is the number of facilities affected by risk reduction measures,
It is. The input data is
Reduction of the collective dose during normal times at the time of introduction of risk reduction measures at each facility,
Annual reduction of collective dose during normal operation after the introduction of risk reduction measures,
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
Including
The second evaluation unit calculates a discounted monetary value of a risk that is avoided in the normal public health of the nuclear power plant as the output data using the following formula: A cost benefit evaluation system for risk reduction measures as described in any one of the items.

here,
V _PHR is the discounted monetary value of the avoided risk of normal public health of the nuclear plant,
D _PRI is the reduction of normal collective dose at each facility when risk reduction measures are introduced.
D _PRO is the annual collective dose reduction for each facility during operation after introduction of risk reduction measures,
R is the monetary value per unit dose,
t _f is the number of years left until the end of the life of the facility,
t _i is the number of years before the facility starts operation,
r is the discount rate,
N is the number of facilities affected by risk reduction measures,
It is. The input data is
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
Exposure dose at the early stage of the accident before risk reduction measures,
Exposure dose at the early stage of the accident after risk reduction measures,
Exposure dose in the long-term stage of the accident before risk reduction measures,
Exposure dose in the long-term stage of the accident after risk reduction measures,
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
The period of long-term exposure before risk reduction measures;
The period of long-term exposure after risk reduction measures;
Discount rate,
The number of facilities affected by risk reduction measures,
Including
The third evaluation unit calculates a discounted monetary value of the risk of the occupational health being avoided at the time of the nuclear plant accident as the output data using the following formula: The cost benefit evaluation system for risk reduction measures according to any one of the above.

here,
V _OHA is the discounted monetary value of the avoided risk of occupational health in the event of a nuclear plant accident,
F _S, the accident frequency of occurrence of the previous risk reduction measures,
F _A, the accident frequency of risk-reduction measures,
D _IOS is the exposure dose at the early stage of the accident before risk reduction measures,
_DIOA is the exposure dose at the early stage of the accident after risk reduction measures,
D _LTOS is the long-term exposure dose at the time of an accident before risk reduction measures.
_DLTOA is the exposure dose in the long-term stage of the accident after risk reduction measures,
R is the monetary value per unit dose,
t _f is the number of years left until the end of the life of the facility,
t _i is the number of years before the facility starts operation,
m _s is the long-term exposure period before risk reduction measures,
m _A is the period of long-term exposure after risk reduction measures,
r is the discount rate,
N is the number of facilities affected by risk reduction measures,
It is. The input data is
Exposure dose per unit time in the radiation field before risk reduction measures;
Exposure dose per unit time in the radiation field after risk reduction measures;
The workforce required for work when introducing risk reduction measures,
Labor force required for work during operation before risk reduction measures,
Labor force required for work during operation after risk reduction measures,
The number of operations per year during operation prior to risk reduction measures;
The number of operations per year during operation after risk reduction measures;
The monetary value per unit dose,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
The number of facilities affected by risk reduction measures,
Including
The fourth evaluation unit calculates the discounted monetary value of the risk of the occupational health of the nuclear power plant in the normal state as the output data using the following mathematical formula. The cost benefit evaluation system for risk reduction measures according to any one of the above.

here,
V _OHR is the discounted monetary value of the avoided risk of normal occupational health of a nuclear plant,
_FRS is the exposure dose per unit time in the radiation field before risk reduction measures,
_FRA is the exposure dose per unit time in the radiation field after risk reduction measures,
W _I is, the labor force required to work at the time of the introduction of risk reduction measures,
W _OS is the labor force necessary for work during operation before risk reduction measures.
_WOA is the labor force necessary for work during operation after risk reduction measures,
A _FS is the number of operations per year during operation before risk reduction measures,
A _FA is the number of operations per year during operation after risk reduction measures,
R is the monetary value per unit dose,
t _f is the number of years left until the end of the life of the facility,
t _i is the number of years before the facility starts operation,
r is the discount rate,
N is the number of facilities affected by risk reduction measures,
It is. The input data is
Accident frequency before risk reduction measures,
Accident frequency after risk reduction measures,
The total cost of decontamination before discount in a single accident before risk reduction measures,
Total cost of decontamination before discount in one accident after risk reduction measures,
The number of years required to return the site before risk reduction measures to the state before the accident,
How many years it takes to return the site after the risk reduction measures to the state before the accident,
Discount rate,
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Alternative power generation costs,
Alternative energy per year from a single accident,
The number of facilities affected by risk reduction measures,
Including
The risk according to any one of claims 1 to 8, wherein the sixth evaluation unit calculates the monetary value of the avoided damage of the on-site property as the output data using the following formula. Cost benefit evaluation system for reduction measures.

here,
V _OP is the monetary value of the avoided damage of on-site property,
F _S, the accident frequency of occurrence of the previous risk reduction measures,
F _A, the accident frequency of risk-reduction measures,
_CCDS is the total cost of decontamination before discount in one accident before risk reduction measures,
C _CDA is the total cost of decontamination before discount in one accident after risk reduction measures,
m _S is the number of years required to return the site before risk reduction measures to the state before the accident,
m _A is the number of years required to return the site after risk reduction measures to the state before the accident,
r is the discount rate,
t _f is the number of years left until the end of the life of the facility,
t _i is the number of years before the facility starts operation,
_CG is the power generation cost of alternative power,
P _G is an alternative amount of power per year by accident once,
N is the number of facilities affected by risk reduction measures,
It is. The input data is
Equipment costs and
Labor costs for construction,
Others,
Including
The risk reduction according to any one of claims 1 to 9, wherein the seventh evaluation unit calculates a burden on the operator at the time of introducing a risk reduction measure as the output data by using the following formula. Cost benefit evaluation system for countermeasures.

here,
V _II is the burden on the operator when introducing risk reduction measures,
K _IIE is the cost of equipment,
K _IIC is the construction labor cost,
K _IIO is other,
It is. The input data is
The undiscounted value of additional costs per year imposed on operators during operation after the introduction of risk reduction measures;
The number of years left until the end of the life of the facility,
The number of years before the facility began operation;
Discount rate,
Including
The said 8th evaluation part calculates the present value of the burden of an operator at the time of the driving | operation after the introduction of the risk reduction measure as said output data using the following numerical formula. Cost benefit evaluation system for risk reduction measures described in the section.

here,
_VIO is the present value of the operator's burden during operation after the introduction of risk reduction measures,
_KIO is the pre-discount value of additional costs per year imposed on operators during operation after introduction of risk reduction measures,
t _f is the number of years left until the end of the life of the facility,
t _i is the number of years before the facility starts operation,
r is the discount rate,
It is. A total calculation unit for calculating a total value of the evaluations of the first to eighth evaluation units,
The cost benefit evaluation system for risk reduction measures according to any one of claims 1 to 11, wherein the data output unit outputs the total value together with the output data. The input data includes a discount rate,
A discount rate determination unit for determining whether the value of the discount rate is 0;
The evaluation unit performs an evaluation using the first type of mathematical expression when the discount rate value determined by the discount rate determination unit is not 0, and the second type when the discount rate value is 0. The cost benefit evaluation system for risk reduction measures according to any one of claims 1 to 12, wherein the evaluation is performed using the mathematical formula. A data receiving step for receiving input data used for evaluating the cost benefit of risk reduction measures for nuclear plant accidents;
A first evaluation step for evaluating a public health cost benefit at the time of the nuclear plant accident based on the input data;
A second evaluation step for evaluating a cost benefit of normal public health of the nuclear power plant based on the input data;
A third evaluation step for evaluating the cost benefit of occupational health at the time of the nuclear plant accident based on the input data;
A fourth evaluation step for evaluating a cost benefit of health of a normal occupational worker of the nuclear power plant based on the input data;
A fifth evaluation step for evaluating cost benefits of off-site property damage based on the input data;
A sixth evaluation step for evaluating a cost benefit of on-site property damage based on the input data;
A seventh evaluation step for evaluating the cost benefit of the burden on the operator at the time of introducing the countermeasure based on the input data;
An eighth evaluation step of evaluating the cost benefit of the burden on the operator at the time of driving after the introduction of measures based on the input data;
A data output step of outputting at least one of the evaluations of the first to eighth evaluation steps as output data;
A cost benefit evaluation method for risk reduction measures characterized by including On the computer,
A data receiving step for receiving input data used for evaluating the cost benefit of risk reduction measures for nuclear plant accidents;
A first evaluation step for evaluating a public health cost benefit at the time of the nuclear plant accident based on the input data;
A second evaluation step for evaluating a cost benefit of normal public health of the nuclear power plant based on the input data;
A third evaluation step for evaluating the cost benefit of occupational health at the time of the nuclear plant accident based on the input data;
A fourth evaluation step for evaluating a cost benefit of health of a normal occupational worker of the nuclear power plant based on the input data;
A fifth evaluation step for evaluating cost benefits of off-site property damage based on the input data;
A sixth evaluation step for evaluating a cost benefit of on-site property damage based on the input data;
A seventh evaluation step for evaluating the cost benefit of the burden on the operator at the time of introducing the countermeasure based on the input data;
An eighth evaluation step of evaluating the cost benefit of the burden on the operator at the time of driving after the introduction of measures based on the input data;
A data output step of outputting at least one of the evaluations of the first to eighth evaluation steps as output data;
A cost benefit evaluation program for risk reduction measures characterized by

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