JP5289235B2 - Operation method of brought-in combustible material management system for nuclear power plant and brought-in combustible material management system - Google Patents

Description

The present invention makes it possible to evaluate fire effects including not only combustible materials installed in nuclear power plants, but also brought-in combustible materials used in equipment remodeling work and equipment maintenance work after the start of plant operation. The present invention relates to an operation method of a brought-in combustible material management system for a nuclear power plant and a brought-in combustible material management system.

  At nuclear power plants, a fire impact assessment is conducted based on the examination guidelines for fire protection of light water reactor facilities for power generation, and fire safety mitigation measures are taken as necessary. Is designed to be maintained.

  Similarly, reprocessing facilities also conduct fire impact assessments and fire impact mitigation measures as necessary to prevent criticality of nuclear materials.

  FIG. 6 is a flowchart showing a conventional fire impact assessment method in these nuclear power plants.

  First, based on the type and amount of combustible material installed in the plant, the amount of heat generated when a fire breaks out in the combustible material installation area is calculated, and the formula (1) is calculated from the heat generation amount and the floor area of the combustible material installation region. , (2), the equivalent fire time T5 is obtained (S51).

Fire load (MJ / m ² ) = Generated heat (MJ) / Area floor area (m ² ) (1)
Equivalent fire time (h) = Fire load (MJ / m ² ) / 909 (MJ / m ² · h) (2)
Next, it compares with the fireproof performance time T6 which the boundary frame structure of a combustible installation area and a fire protection equipment have (S52). The fireproof performance time T6 is a time determined from the type and thickness of the boundary housing material in the combustible installation area (see Non-Patent Document 1, page 25, FIG. 4-4).

  As a result of comparing the equivalent fire time T5 and the fireproof performance time T6, if the equivalent fire time T5 is equal to or shorter than the fireproof performance time T6, it is evaluated that the fire influence remains in the combustible installation area. On the other hand, if the equivalent fire time T5 exceeds the fire resistance performance time T6, the calorific value is reduced by reducing combustibles, or a fire protection facility is added to take measures to reduce the fire impact (non- Patent Document 1).

JEAG 4607-1999 "Fire Protection Guidelines for Nuclear Power Stations", Electricity Engineering Guidelines, Nuclear Energy, pages 24-25

  In a nuclear power plant, equipment remodeling work and equipment maintenance work are carried out during plant operation, and therefore combustibles may be brought in during plant operation.

  However, in the conventional fire impact assessment, as described above, the calorific value is calculated based on the type and amount of combustibles installed in the plant, and equipment remodeling work and equipment maintenance work after the start of plant operation, etc. The amount of heat generated based on the type and amount of combustible materials used in is not added.

  Therefore, if the equivalent fire time is calculated by adding the calorific value based on the type and amount of combustible materials brought in, the fire resistance performance time of the boundary frame structure etc. of the combustible material installation area will be exceeded. Sometimes it was necessary. However, there is no evaluation method for managing the type and amount of these combustible materials, and the necessary fire impact mitigation measures have not been implemented so far.

  In addition, the type and amount of combustible materials installed in the plant are stored as master data files by plant manufacturers.

  For this reason, for work combustibles that are frequently brought into nuclear power plants, provide information on the type and amount of combustibles that are brought into the plant manufacturer at each work, and the results of the fire impact assessment conducted by the plant manufacturer. If it is confirmed and permission to bring combustibles for work into the nuclear power plant is required, it will take time to exchange information, and it will take a long time to permit work, making it difficult to respond quickly.

  Furthermore, even if combustible materials are consumed by work in a nuclear power plant, or if combustible materials are removed after work, information on the type and amount of combustible materials that remain in the master data file stored by the plant manufacturer remains. There was a thing.

  For this reason, there was a risk of performing an incorrect fire impact assessment based on information on the type and amount of non-existent combustible materials.

  On the other hand, when a fire impact assessment is not performed by the plant manufacturer and the fire management assessment is performed based on the type and quantity of combustible materials brought in by the nuclear power plant work management organization, a data file is sent from the plant manufacturer to the work management organization. A copy will be provided.

  In this case, when conducting a fire impact assessment in the work management organization, there was a possibility that the type and amount of combustible material to be installed would be changed unintentionally. For this reason, there was a risk of performing an incorrect fire impact assessment.

  Therefore, the present invention has been made to solve the above-described problems, and enables fire impact assessment for managing the type and amount of brought-in combustible materials in a short time, and information on actual brought-in combustible materials. The purpose is to prevent erroneous fire impact assessments based on unintentionally modified master data files.

In order to achieve the above-mentioned object, an operation method of a combustible material management system for a nuclear power plant according to the present invention includes a server and a combustible material for a nuclear power plant including a plant local area LAN formed in the nuclear power plant. An operation method of a management system, wherein the server includes a master data file for fire impact assessment that records the type and amount of combustible material installed for each area in the plant, and a server terminal. The local area LAN includes an application terminal for inputting data relating to the type and amount of combustible materials brought in, and an impact assessment determination terminal, and the server terminal uses the fire impact assessment master data file to From the calorific value based on the type and amount of the combustible material installed every time and the floor area of the area where the combustible material is installed, the following formula (1), ( ) By calculating the equivalent fire time T1,
Fire load = generated heat / area floor area (1)
Equivalent fire time = Fire load / Equivalent fire time conversion factor (2)
The step of calculating the margin time T3 by taking the difference between the fire resistance performance time T2 determined in advance from the type and thickness of the boundary housing material in the area where the combustible material is installed, and the combustible management that records at least the margin time T3 Transmitting the data file to the plant premises LAN, and the impact assessment determination terminal receives the received combustible material management data file and the type and amount of the combustible material brought in from the application terminal. based on the calorific value based on the floor area of the area bringing combustible materials, the above formula (1), to calculate the equivalence fire time T4 by the (2), the allowance and the equivalence fire time T4 comparing the time T3, when the equivalent fire time T4 of the carry-combustibles of the margin time T3 following permits carry-over of the combustible materials, hand, before Symbol equivalent fire time T4 is the margin time T3 Up If that is disallowed carry-over of the combustible materials, the step of approval or denial of the carry-combustibles data, and executes.

In order to achieve the above-described object, the nuclear combustible plant brought-in combustible material management system according to the present invention includes a server and a plant-related local area LAN formed in the nuclear power related plant site. The system, wherein the server uses a fire impact assessment master data file that records the type and amount of combustibles permanently installed for each area in the plant, and the fire impact assessment master data file, From the calorific value based on the type and amount of combustibles installed for each area in the plant and the floor area of the area where combustibles are installed, the equivalent fire time T1 is calculated by the following formulas (1) and (2). Calculate
Fire load = generated heat / area floor area (1)
Equivalent fire time = Fire load / Equivalent fire time conversion factor (2)
A server terminal that calculates a margin time T3 by taking a difference between a fireproof performance time T2 that is determined in advance from the type and thickness of the boundary housing material in the combustible material installation area, and records at least the margin time T3 to the plant premises LAN. A combustible material management data file to be sent, and the plant local area LAN inputs an application terminal for inputting data on the type and amount of combustible combustible material, the received combustible material management data file, and the application terminal. Based on the calorific value based on the type and amount of the combustible material input and the floor area of the area where the combustible material was brought in, the equivalent fire time T4 is calculated by the above formulas (1) and (2), The equivalent fire time T4 and the allowance time T3 are compared. If the equivalent fire time T4 is less than or equal to the allowance time T3, the introduction of the combustible material is permitted. When the equivalent fire time T4 exceeds the allowance time T3, a fire influence evaluation judgment terminal that approves or denies the brought-in combustible material data is disapproved, and between these terminals, An electronic network is constructed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to perform fire influence evaluation which manages the kind and quantity of a combustible material to bring in in a short time. In addition, it is possible to prevent an erroneous fire impact assessment from being performed based on information relating to non-existent combustible materials or a master data file that has been changed unintentionally.

The flowchart which shows the brought-in combustibles management method which concerns on the 1st Embodiment of this invention. The flowchart which shows the brought-in combustibles management method which concerns on the 2nd Embodiment of this invention. Schematic which shows the brought-in combustibles management system which concerns on the 3rd Embodiment of this invention. Schematic which shows the brought-in combustibles management system which concerns on the 4th Embodiment of this invention. The data figure which shows an example of the data file for carrying in combustibles management. The flowchart which shows the fire influence evaluation method of the nuclear power related plant of a prior art example.

  Hereinafter, embodiments of a brought-in combustible material management method and a brought-in combustible material management system for a nuclear power plant according to the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a flowchart showing a method for managing combustible commodities according to the first embodiment of the present invention.

  In this combustible material management method, the master data file for fire impact assessment carried out at the nuclear power plant is used. First, the calorific value based on the type and amount of combustible material installed for each area in the plant. From the floor area of the combustible material installation area, the equivalent fire time T1 is calculated using equations (1) and (2) (S1).

  Next, the margin time T3 is calculated by taking the difference (T2-T1) between the fire resistance performance time T2 determined in advance from the type and thickness of the boundary housing material in the combustible material installation area (S2), and this margin time T3 is brought in. Used as combustible material management data.

  Next, when using combustible materials brought in due to equipment remodeling work and equipment maintenance work, etc., from the calorific value based on the type and amount of combustible materials brought in and the floor area of the area where combustible materials are brought in, Equation (1), Using (2), an equivalent fire time T4 for the combustible material brought in is calculated (S3).

  Further, the equivalent fire time T4 of the brought-in combustible material is compared with the margin time T3 which is the combustible material management data (S4).

  As a result of the comparison, when the equivalent fire time T4 of the brought-in combustible is equal to or less than the surplus time T3, the bringing-in of the combustible is permitted. On the other hand, if the equivalent fire time T4 of the brought-in combustible material exceeds the margin time T3, the bringing-in of combustible material is not permitted.

  In addition, when using each combustible material in multiple facilities remodeling work and equipment maintenance work in the same area, the calorific value based on the type and amount of each combustible material shall be added.

  According to the brought-in combustible material management method of the present embodiment, since the surplus time T3 is used as brought-in combustible material management data, it is not necessary to change the master data file for fire impact assessment held by the plant manufacturer. Combustible material management by work management organizations of other nuclear power plants becomes possible. Therefore, the time period required for sending and receiving information is reduced, and quick fire impact assessment becomes possible in a short time.

  In addition, it is possible to limit the bringing in of the combustible material exceeding the fireproof performance time of the area where the combustible material is brought in, and even when a fire occurs, it is possible to keep the fire effect in the area. Therefore, it is possible to prevent adverse effects on the facilities having the safety function of the nuclear power plant.

  Furthermore, since there is no information on the type and amount of combustible materials brought in in the master data file for fire impact assessment, it is possible to prevent an erroneous fire impact assessment based on information on the type and amount of non-existent combustible materials.

(Second Embodiment)
FIG. 2 is a flowchart showing a method for managing combustible combustibles according to the second embodiment of the present invention. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In this method of managing combustible materials, if combustible materials are consumed in equipment remodeling work and equipment maintenance work, etc., or taken out after completion of equipment remodeling work and equipment maintenance work, etc. The equivalent fire time T5 of the brought-in combustible material is calculated using the formulas (1) and (2) in the same manner as in the first embodiment, reflecting the amount of decrease (S5).

  Next, the equivalent fire time T5 and the allowance time T3 are compared (S6).

  As a result of comparison, when the equivalent fire time T5 is equal to or less than the surplus time T3, the addition of brought-in combustibles is permitted. On the other hand, when the equivalent fire time T5 for the combustible combustible exceeds the surplus time T3, the addition of the combustible combustible is not permitted.

  According to the present embodiment, in the first embodiment, the equivalent fire time T4 of the brought-in combustible material exceeds the allowance time T3, and the combustible material brought in first is brought about the combustible material which is not allowed to be brought in. Depending on the degree of decrease, it becomes possible to bring in additional combustible materials that have a calorific value corresponding to the difference between the equivalent fire time T5 and the surplus time T3 of the remaining combustible materials. Therefore, continuous equipment remodeling work and equipment maintenance work can be performed.

(Third embodiment)
FIG. 3 is a schematic diagram showing a brought-in combustible material management system according to the third embodiment of the present invention.

  The brought-in combustible material management system includes a plant manufacturer's server 10 and a plant premises LAN 20 formed on the nuclear power plant premises.

  In the plant premises LAN 20, an electronic network is constructed by the PC 21 for determining the impact of fire that approves or denies the data of combustible commodities, and the PCs 22 and 23 of the on-premises companies that create applications and work schedules for the data of combustible commodities. Yes.

  In addition, the plant manufacturer server 10 includes a plant manufacturer PC 11 that reflects the plant improvement work in the fire impact assessment, and a fire impact assessment in which the type and amount of combustible material installed for each area in the plant are recorded. A master data file 12 and a brought-in combustible material management data file 13 which is created from the fire impact assessment master data file 12 and is wirelessly transmitted to the fire impact assessment judgment PC 21 of the plant premises LAN 20 are provided.

  In this brought-in combustible material management system, first, a brought-in combustible material management data file 13 is created from the fire impact assessment master data file 12 in the plant manufacturer PC 11 of the server 10 of the plant manufacturer. This brought-in combustible material management data file 13 is transmitted to the fire impact assessment judgment PC 21 by radio.

  Next, brought-in combustible material data planned to be used by the person in charge of equipment remodeling work and equipment maintenance work is input from the on-premises companies PCs 22 and 23 and applied to the fire impact assessment judgment PC 21 as electronic information.

  The fire impact assessment judgment PC 21 adds the brought-in combustible material data when there is an application for brought-in combustible material to the same area based on the received brought-in combustible management data file 13, and the first embodiment The equivalent fire time T4 of the brought-in combustible material is calculated by the method described in.

  As a result, if the area where the combustibles are brought in is less than the time T3, the combustibles are allowed to be brought in. If the equivalent fire time T4 of the combustibles exceeds the time T3, the combustibles are not allowed. And automatically notifies the application results to the on-premises company PCs 22 and 23 of the plant-premises LAN 20.

  According to the present embodiment, it becomes possible to automatically carry out the determination of the combustible material bringing-in condition on the electronic information by comparing the equivalent fire time T4 and the allowance time T3 of the brought-in combustible material, from the application to the determination. Time saving and labor saving.

(Fourth embodiment)
FIG. 4 is a schematic diagram showing a brought-in combustible material management system according to the fourth embodiment of the present invention.

  As in the third embodiment, this brought-in combustible management system includes a plant manufacturer's server 10 and a plant premises LAN 20 formed on the nuclear power plant premises.

  In the plant premise LAN 20, as in the third embodiment, an electronic network is constructed by the fire impact assessment PC 21 and the premise enterprise PCs 22 and 23.

  Similarly to the third embodiment, the server 10 of the plant manufacturer includes a plant manufacturer PC 11, a fire impact assessment master data file 12, and a brought-in combustible material management data file 13.

  However, in this brought-in combustible material management system, the nuclear power plant entrance / exit 30 further includes data input PCs 31 and 32. The data input PCs 31 and 32 may be provided not in the nuclear power related plant entrance 30 but in the combustible material bring-in area.

  The data input PCs 31 and 32 are terminal devices for inputting and outputting data for management of combustible materials, and confirm the consistency between the combustible material data submitted in advance by the local companies PCs 22 and 23 and the combustible material actually brought in. In addition, when there is inconsistency, it is for inputting actual brought-in combustible material data.

  In this brought-in combustible material management system, as in the third embodiment, the brought-in combustible material management data file 13 created in the plant maker PC 11 is wirelessly transmitted to the PC 21 for fire impact assessment judgment, and the equipment is remodeled. Combustible material data to be used by the person in charge of equipment maintenance work and the like is input from the on-premises companies PCs 22 and 23, and is preliminarily applied as electronic information to the fire impact assessment judgment PC 21.

  Next, the data input PCs 31 and 32 installed at the entrance / exit 30 of the nuclear power plant are used to confirm the consistency between the previously applied combustible material data and the actually brought combustible material. And when there is inconsistency, actual brought-in combustible material data is input.

  As with the third embodiment, the fire impact evaluation judgment PC 21 calculates the equivalent fire time T4 based on the received brought-in combustible material management data file 13 and the brought-in combustible material data.

  As a result, if the area where the combustible material is brought in is less than the allowance time T3, the admission of combustible material is permitted, and if the equivalent fire time T4 for the combustible material exceeds the allowance time T3, the combustible material is not allowed to be brought in. Permission.

  In addition, the amount of combustibles consumed in equipment remodeling work and equipment maintenance work, and the decrease in combustibles due to removal after the completion of the electronic data input / output for the combustibles management system brought in at the entrance / exit 30 of the nuclear power plant or in the combustibles bring-in area Input at the terminal devices 31 and 32.

  In addition, at the site 40, the worker may input the amount of combustible material brought in using the PDF terminal 41 on the spot.

  The fire impact assessment PC 21 calculates the equivalent fire time T5 of the brought-in combustible material by reflecting the reduction amount of the brought-in combustible material from the brought-in area by the method described in the second embodiment. Then, the equivalent fire time T5 is compared with the allowance time T3. When the equivalent fire time T5 is equal to or less than the allowance time T3, the addition of brought-in combustible materials is permitted. On the other hand, when the equivalent fire time T5 for the combustible combustible exceeds the surplus time T3, the addition of the combustible combustible is not permitted.

  According to the present embodiment, it is possible to grasp the actual state of the state of bringing in combustible materials on the site, and it is possible to determine whether or not the on-site combustibility data can be determined even when there is a change in the previously applied combustible material data. . Furthermore, as shown in the second embodiment, the equivalent fire time T4 of the brought-in combustible material exceeds the margin time T3, and as shown in the second embodiment, the amount of the combustible material brought in earlier is reduced. Accordingly, it becomes possible to additionally bring in combustibles having a calorific value corresponding to the difference between the equivalent fire time T5 and the surplus time T3 of the remaining brought-in combustibles, and continuous equipment remodeling work and equipment maintenance work can be performed.

(Example)
Using the data file for managing combustible materials shown in FIG. 5, the fire impact assessment of combustible materials was conducted.

First, using the fire impact assessment master data file 12 implemented in the nuclear power plant, the plant manufacturer PC11 calculates the total calorific value of the entire combustible materials 1 to 85, which is 17247MJ. The value of was obtained. Next, since the floor area of the area in the nuclear power plant is 1025 m ² , the equivalent fire time T1 was calculated from the formulas (1) and (2), resulting in 0.019 hours.

  Since the fireproof performance time T2 in the combustible material installation area is 2 hours, the allowance time T3 is 1.981 hours from T2-T1.

  Based on these data, the plant manufacturer PC11 created a data file for bringing in combustibles as shown in FIG. In this brought-in combustible material management data file, the data about the combustible material and the data about T1 to T3 are set to default values set in advance so that they cannot be changed by the PC 21 for determining the fire impact assessment. ing.

  Next, the brought-in combustible material management data file 13 was wirelessly transmitted to the fire impact assessment judgment PC 21, and the fire impact assessment of the brought-in combustible material was performed in the fire impact assessment judgment PC 21.

  That is, when an additional application is made for 96500 kg of copy paper as a brought-in combustible material from the on-premises company PCs 22 and 23, etc., the calorific value of the copy paper is calculated in the fire impact assessment judgment PC 21, and based on the calorific value 1833500MJ, the formula (1), As a result of obtaining the equivalent fire time T4 from (2), it was 1.968 hours.

  As a result of comparing the equivalent fire time T4 and the allowance time T3 by the PC 21 for fire impact assessment and judgment, the equivalent fire time T4 is smaller than the allowance time T3. , 23 etc. were automatically notified.

  10: Server, 11: Plant manufacturer PC (server terminal), 12: Fire impact assessment master data file, 13: Bringable combustibles management data file, 20: Plant premises LAN, 21: Fire impact assessment judgment PC, 22 , 23: On-site company PC (application terminal), 30: Nuclear power plant entry / exit, 31, 32: Data input PC (data input terminal), 40: On-site, 41: PDF

Claims (4)

A method for operating a brought-in combustible material management system for a nuclear-related plant comprising a server and a plant-premises LAN formed on the site of the nuclear-related plant,
The server
A fire impact assessment master data file that records the type and amount of combustibles installed for each area in the plant, and a server terminal,
The plant campus LAN is
It has an application terminal that inputs data on the type and amount of combustibles brought in, and an impact assessment terminal,
The server terminal is
Using the master data file for fire impact assessment, from the calorific value based on the type and amount of combustible material installed for each area in the plant, and the floor area of the area where combustible material is installed, the following formula ( 1) Calculate the equivalent fire time T1 by (2),
Fire load = generated heat / area floor area (1)
Equivalent fire time = Fire load / Equivalent fire time conversion factor (2)
Calculating the margin time T3 by taking the difference between the fireproof performance time T2 determined in advance from the type and thickness of the boundary housing material in the combustible material area ;
Transmitting at least the combustible management data file recording the margin time T3 to the plant campus LAN;
The impact assessment determination terminal, and data files for the combustible material management received, the heat generating amount based on the type and amount of carry-combustibles input from application terminal, based on the floor area of the area bringing the combustibles , the equation (1), (2) to calculate the equivalence fire time T4 by a comparison between said equivalent fire time T4 the margin time T3, the carry-equivalent fire time T4 combustibles said If the margin time T3 following allow carry-over of the combustible materials, hand, in the case of prior SL equivalent fire time T4 exceeds the allowance time T3 to not permit the carry-over of the combustible material, bringing combustible The step of approving or denying property data
A method of operating a brought-in combustible material management system for a nuclear power plant, characterized in that it is executed . The terminal for impact assessment determination is
When the brought-in combustibles are reduced due to consumption or take-out of brought-in combustibles, the equivalent fire time T5 of the brought-in combustibles reflecting the reduced amount is calculated and compared with the margin time T3, and the equivalent fire time T5 is calculated. When the margin time T3 or less, the addition of combustible materials is permitted. On the other hand, when the equivalent fire time T5 exceeds the margin time T3, the addition of combustible materials is not permitted. The operation method of the combustible material management system for a nuclear power plant according to claim 1. A nuclear-related plant brought-in combustible management system comprising a server and a plant-premises LAN formed on the site of the nuclear-related plant,
The server
A master data file for fire impact assessment that records the type and amount of combustibles installed for each area in the plant;
Using the master data file for fire impact assessment, from the calorific value based on the type and amount of combustible material installed for each area in the plant, and the floor area of the area where combustible material is installed, the following formula ( 1) Calculate the equivalent fire time T1 by (2),
Fire load = generated heat / area floor area (1)
Equivalent fire time = Fire load / Equivalent fire time conversion factor (2)
A server terminal that calculates a margin time T3 by taking a difference between a fireproof performance time T2 determined in advance from the type and thickness of the boundary housing material in the combustible material installation area;
At least the allowance time T3 is recorded, and the data file for bringing in combustibles managed to be sent to the plant premise LAN,
The plant campus LAN is
An application terminal for entering data on the type and amount of combustibles,
Based on the received combustible material management data file, the calorific value based on the type and amount of the combustible material brought in from the application terminal, and the floor area of the area where the combustible material was brought in, the above formula (1) (2), the equivalent fire time T4 is calculated, the equivalent fire time T4 is compared with the margin time T3, and if the equivalent fire time T4 is equal to or less than the margin time T3, the combustible material is brought in. On the other hand, when the equivalent fire time T4 exceeds the allowance time T3, a fire impact assessment judgment terminal is provided for disallowing the introduction of the combustible material and for approving or denying the data of the combustible material. A combustible material management system for nuclear-related plants, characterized in that an electronic network is constructed between these terminals.   A terminal for inputting combustible material management data for inputting confirmation of and change of brought-in combustible materials, and consumption and carry-out amount is further installed at the entrance of the nuclear-related plant or in the nuclear power plant. 4. A brought-in combustible material management system for a nuclear power plant according to claim 3.

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