Nuclear fuel material management system and nuclear fuel material management method

Abstract

To enable traceability management obtained by considering a composition change in a nuclear fuel material to be achieved in manufacturing nuclear fuel.SOLUTION: A nuclear fuel management system includes a stock management database 12 for storing management information of nuclear fuel materials obtained by combining identification information of the nuclear fuel materials, a history management database 15 for storing history information of the nuclear fuel materials including management identification information for identifying a combination before and after a composition change in the nuclear fuel materials, and a stock information provision function part 16 and a history information provision function part 17 that retrieve the management information of the nuclear fuel materials from the stock management database 12 on the basis of the identification information and the history information of the nuclear fuel materials from the history management database 15 on the basis of the management identification information and output them to the outside, and is configured to be able to grasp and manage a history before and after the composition change of the nuclear fuel materials.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a nuclear fuel material management system and a nuclear fuel material management method during the production of nuclear fuel. [Background technology]

[0002] In nuclear facilities, the type and amount of radioactive materials handled change as they are operated, due to changes in their form, new generation, or depletion. Under these circumstances, it is important to manage the traceability of radioactive materials in order to strictly control the composition and mass of the radioactive materials handled and to report this to the national and international community.

[0003] At nuclear facilities, processes such as mixing, separation, compression and volume reduction, nuclear generation, and nuclear wastage are repeated throughout the process from the receipt or generation of radioactive materials to final processing. However, traditionally, these processes have been managed individually, making it difficult to achieve traceability of radioactive materials from receipt or generation to final processing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-12103 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-37324 [Patent Document 3] Patent Publication No. 2021-26643 [Patent Document 4] Japanese Patent Application Laid-Open No. 2006-300582 [Patent Document 5] Japanese Patent Publication No. 2022-62474 Summary of the Invention [Problem to be solved by the invention]

[0005] One method for realizing traceability management is a method for managing the process of radioactive waste handled at nuclear facilities from generation to final disposal (for example, Patent Document 1). This radioactive waste traceability management method can realize traceability management of radioactive waste in which processes such as repackaging and volume reduction are repeated in one direction from upstream to downstream processes from generation of radioactive materials to final disposal. However, this radioactive waste traceability management method is limited to the management of radioactive waste at nuclear facilities, and there is still room for improvement in the traceability management of nuclear fuel materials.

[0006] In the past, nuclear fuel materials such as uranium and plutonium within nuclear facilities were mainly managed individually at each stage, including inventory information and processing information, making it difficult to grasp the processing route from receipt of radioactive materials to their release.

[0007] Maintaining a certain level of quality is particularly important in the manufacture of MOX fuel assemblies, making the processing route more complex. The manufacturing process for MOX fuel assemblies at a MOX fuel assembly fabrication plant involves receiving raw material powder (uranium powder and MOX powder) made from nuclear fuel materials such as uranium and plutonium, mixing the powder, producing pellets, manufacturing fuel rods, assembling the fuel assemblies, and shipping. If the quality standards are not met, the process may be repeated upstream.

[0008] In order to more strictly control the quality of MOX fuel assemblies and the composition and mass of the nuclear fuel material that makes up the MOX fuel assemblies, it is necessary to manage manufacturing route information in addition to individual management of inventory information, processing information, etc. within the facility at each stage. Also, while the radioactive waste traceability management method described in the aforementioned publication realizes traceability management at nuclear facilities where waste processing is carried out, in the manufacture of MOX fuel assemblies, it is necessary to consider the flow of nuclear fuel material throughout the entire nuclear fuel cycle.

[0009] The embodiments of the present invention have been made in consideration of the above circumstances, and aim to provide a nuclear fuel material management system and a nuclear fuel material management method that can realize traceability management that takes into account changes in the composition of nuclear fuel material during nuclear fuel production. [Means for solving the problem]

[0010] A nuclear fuel material management system in an embodiment of the present invention comprises a management information database that stores management information of the nuclear fuel material combined with identification information of the nuclear fuel material, a history information database that stores history information of the nuclear fuel material including management identification information that identifies the combination of the nuclear fuel material before and after a composition change, and an information providing means that searches for and externally outputs the management information of the nuclear fuel material from the management information database based on the identification information, and the history information of the nuclear fuel material from the history information database based on the management identification information, and is characterized in that it is configured to be able to grasp and manage the history of the nuclear fuel material before and after a composition change.

[0011] A nuclear fuel material management method in an embodiment of the present invention includes the steps of registering and storing management information including identification information of nuclear fuel material in a management information database by a nuclear material management information registration means, and creating management identification information that identifies the combination of the nuclear fuel material before and after the composition change by a management identification information management means, and registering and storing history information of the nuclear fuel material including this management identification information in a history information database, and is characterized by grasping and managing the history of the nuclear fuel material before and after the composition change. [Effects of the Invention]

[0012] According to an embodiment of the present invention, it is possible to realize traceability management that takes into account changes in the composition of nuclear fuel materials during the production of nuclear fuel. [Brief explanation of the drawings]

[0013] [Figure 1]FIG. 1 is an explanatory diagram showing an example of a manufacturing process of a MOX fuel assembly to which a nuclear fuel material control system according to a first embodiment is applied. [Figure 2] FIG. 1 is a block diagram showing the configuration of a nuclear fuel material management system according to a first embodiment. [Figure 3] 3 is a diagram showing an example of management information of nuclear fuel materials stored in the inventory management database of FIG. 2. [Figure 4] 3 is a diagram showing an example of management information of nuclear fuel materials stored in the inventory management database of FIG. 2. [Figure 5] 10 is a diagram showing an example of management information of nuclear fuel material in which combinations of nuclear fuel material before and after composition changes are associated with each other. [Figure 6] 3 is a diagram showing an example of history information stored in the history management database of FIG. 2, which associates management information before and after a change in the composition of nuclear fuel material. [Figure 7] An explanatory diagram showing the history of the processes that nuclear fuel materials received at a MOX fuel assembly fabrication plant have undergone, using internal identification numbers for history management. [Figure 8] FIG. 10 is a block diagram showing the configuration of a nuclear fuel material management system according to a second embodiment. [Figure 9] FIG. 10 is a block diagram showing the configuration of a nuclear fuel material management system according to a third embodiment. [Figure 10] FIG. 10 is an explanatory diagram showing the overall configuration of a nuclear fuel cycle to which a nuclear fuel material control system according to a fourth embodiment is applied. [Figure 11] FIG. 10 is a block diagram showing the configuration of a nuclear fuel material management system according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [A] First embodiment (Figs. 1 to 7) FIG. 1 is an explanatory diagram showing an example of a MOX fuel assembly manufacturing process to which the nuclear fuel material control system according to the first embodiment is applied. This FIG. 1 specifically illustrates the changes in the morphology and composition of nuclear fuel materials (e.g., MOX powder, uranium powder, etc.) during the MOX (uranium-plutonium mixed oxide) fuel assembly manufacturing process. Specifically, MOX powder shipped from controlled area RA999 outside the MOX fuel assembly manufacturing plant is received in controlled area A100 of the MOX fuel assembly manufacturing plant, and uranium powder shipped from controlled area UA999 outside the MOX fuel assembly manufacturing plant is received in controlled area A150 of the MOX fuel assembly manufacturing plant. Subsequently, the MOX powder, uranium powder, and recovered powder generated during the MOX fuel assembly manufacturing process and stored in controlled area A700 of the MOX fuel assembly manufacturing plant for reuse are primarily mixed in controlled area A200 of the MOX fuel assembly manufacturing plant.

[0015] Furthermore, the primary mixed powder, uranium powder, and recovered powder that were primarily mixed in control area A200 are secondarily mixed in control area A300 of the MOX fuel assembly fabrication plant. The secondary mixed powder that was secondarily mixed in control area A300 is processed into MOX pellets in control area A400 of the MOX fuel assembly fabrication plant. The MOX pellets processed in control area A400 are processed into MOX fuel rods in control area A500 of the MOX fuel assembly fabrication plant.

[0016] The MOX fuel rods processed in control area A500, together with uranium fuel rods shipped from control area FA999 outside the MOX fuel assembly fabrication plant and received in control area A190 at the MOX fuel assembly fabrication plant, are processed into MOX fuel assemblies in control area A600 at the MOX fuel assembly fabrication plant and shipped to the nuclear power plant. Radioactive materials generated during the MOX fuel assembly fabrication process that are not reused are stored as radioactive waste in control area A800 at the MOX fuel assembly fabrication plant. The numbers shown in Figure 1 (I101, I102, etc.) are examples of identification numbers used to uniquely identify information about nuclear fuel material in each state.

[0017] The nuclear fuel material management system 10 shown in Figure 2 grasps and manages the history of nuclear fuel material before and after changes in composition to manufacture nuclear fuel, particularly MOX fuel assemblies, during the manufacture of these MOX fuel assemblies, and is composed of a nuclear material management information registration function unit 11 as a nuclear material management information registration means, an inventory management database 12 as a management information database, a nuclear material management information association function unit 13 as a nuclear material management information association means, a management identification information management function unit 14 as a management identification information management means, a history management database 15 as a history information database, an inventory information provision function unit 16 and a history information provision function unit 17 as information provision means, and an operation terminal 18 as a correction means.

[0018] Here, management information for the nuclear fuel material that constitutes the MOX fuel assembly (e.g., amount of radioactive material, nuclide composition ratio, nationality information, processing history, item identification number, primary container identification number, etc.) is managed individually in electronic data such as nuclear material data 1 and 2, nuclear material history data 3, paper data such as forms 4, 5, and 6, or in a lower-level system 7.

[0019] The nuclear material management information registration function unit 11 inputs management information for nuclear fuel materials, which combines identification numbers of nuclear fuel materials at the MOX fuel assembly manufacturing plant, from the nuclear material data 1, the report 4 or the lower-level system 7, and registers and stores the information in the inventory management database 12.

[0020] The nuclear material management information associating function unit 13 associates and identifies the combination of the nuclear fuel material before and after the composition change based on the management information of the nuclear fuel material.

[0021] In order to enable history management of nuclear fuel material in MOX fuel assemblies, the management identification information management function unit 14 creates management identification information (history management internal identification numbers 151, 152 (FIG. 6) described below) that identifies the combination of nuclear fuel material before and after the composition change that has been associated and identified by the nuclear material management information association function unit 13. Furthermore, the management identification information management function unit 14 registers and stores in the history management database 15 history information that includes the management identification information and associates the management information before and after the composition change of the nuclear fuel material.

[0022] The inventory information provision function unit 16 searches for and extracts the management information of nuclear fuel material stored in the inventory management database 12 based on the identification information of the nuclear fuel material, and outputs it to the nuclear material data 2, the ledger 5, or the lower-level system 7. In addition, the history information provision function unit 17 searches for and extracts the history information of nuclear fuel material stored in the history management database 15 based on the management identification information, and outputs it to the nuclear material history data 3 or the ledger 6.

[0023] The operation terminal 18 is a human-machine interface for inputting and outputting, registering, modifying, deleting, etc., information for the nuclear material management information registration function unit 11, inventory management database 12, nuclear material management information association function unit 13, management identification information management function unit 14, history management database 15, inventory information provision function unit 16, and history information provision function unit 17.

[0024] Figures 3 and 4 show examples of individual management information for nuclear fuel material in each of the management areas A100, A200, etc. in Figure 1, registered by the nuclear material management information registration function unit 11 in Figure 2. Nuclear fuel material in the management area A100 is uniquely identified by a combination of an item identification number 101 for identifying the form and item of the nuclear material, a lot identification number 102 for identifying the nuclide composition ratio and nationality information, a primary container identification number 103 for identifying the primary container in which the nuclear fuel material is directly stored or filled, a secondary container identification number 104 for identifying the secondary container in which one or more primary containers are stored, and a management area identification number 105 for identifying the management area in which the nuclear fuel material is located.

[0025] Subsequent management areas such as management areas A150, A190, A200, A300, A400, A500, A600, A700, A800, RA999, UA999, FA999, etc. are identified in the same manner.

[0026] Here, there are cases where the items themselves, such as fuel rods or fuel assemblies, are handled as primary containers, and in addition, when the same lot or primary and secondary containers are handled across control areas, some of the nuclear fuel material in the primary or secondary containers may be handled in other primary or secondary containers in the next control area. Even for nuclear fuel material in the same control area and the same primary or secondary containers, the amount of radioactive material and nuclide composition ratio change over time due to nuclear wastage, so in addition to various identification numbers, the date and time of the work and inspections described below are also managed.

[0027] The management information for each nuclear fuel material in management area A100 includes, in addition to identification numbers 101 to 105, radioactive material amount 106, nuclide composition ratio 107, nationality information 108, work implementation date 109 and work implementation time 110, which are the date and time when work or processing was performed on the nuclear fuel material or a specific date and time for considering nuclear wastage, work information 111, which is the content of the work and processing at the above date and time, and inspection information 112, which is the inspection results if an inspection was performed on the nuclear fuel material. Note that the same management is performed for subsequent management areas such as management areas A150, A190, A200, A300, A400, A500, 600, A700, A800, RA999, UA999, FA999, etc.

[0028] The management information for nuclear fuel material is mainly managed individually for each management area, such as identification numbers 101 to 105 for uniquely identifying the nuclear fuel material, the amount of radioactive material 106, the nuclide composition ratio 107, and work information 111 between and within the management areas. With this individual management of the management information for nuclear fuel material for each management area, it is difficult to grasp the history of each process from receipt to release of the nuclear fuel material, as the form of the nuclear material changes.

[0029] Figure 5 shows an example of management information for understanding the history of composition changes of nuclear fuel material in each process from receipt to release, which is associated by the nuclear material management information association function unit 13 in Figure 2. This management information shows a combination of before and after composition changes for a specific nuclear fuel material, taking into account the manufacturing process of the MOX fuel assembly shown in Figure 1, in contrast to the management information shown in Figures 3 and 4, in which information on nuclear fuel material is managed individually.

[0030] For nuclear fuel material identified at a certain point in time as control area identification number 105 being A100, item identification number 101 being P101, lot identification number 102 being L101, primary container identification number 103 being I101, and secondary container identification number 104 being O101, it can be seen that before the composition change, which is the state before the work and processing managed by work implementation date 109, work implementation time 110, and work information 111, the nuclear fuel material was identified as control area identification number 131 being RA999, item identification number 132 being RP999, lot identification number 133 being RL997, primary container identification number 134 being RI996, and secondary container identification number 135 being RO997.

[0031] In Figure 5, the nuclear fuel material shown after the nuclear fuel material is managed in the same way. For example, the nuclear fuel material before the composition change of the nuclear fuel material identified by the control area identification number 105 being A700, the item identification number 101 being P701, the lot identification number 102 being L701, the primary container identification number 103 being I701, and the secondary container identification number 104 being O701 is nuclear fuel material identified by the control area identification number 131 being A400, the item identification number 132 being P499, the lot identification number 133 being L499, the primary container identification number 134 being I499, and the secondary container identification number 135 being O499, and is nuclear fuel material that was handled before the fabrication of the MOX fuel assembly shown in Figure 1. The nuclear fuel material with control area identification number 131 A400 before the composition change is nuclear fuel material identified as control area identification number 131 AAA, item identification number 132 PPP, lot identification number 133 LLL, primary container identification number 134 III, and secondary container identification number 135 OOO.

[0032] As shown in Figure 5, by managing the management information of nuclear fuel material at a certain point in time in association with the management information of the nuclear fuel material before the composition change that led to this nuclear fuel material, it becomes possible to understand the history of the nuclear fuel material before and after the composition change.

[0033] Figure 6 shows an example of history information that enables history management of nuclear fuel material from receipt to release, created from management information before and after changes in the composition of nuclear fuel material in each management area shown in Figure 5. This history information is intended to track history, and is created by the management identification information management function unit 14 in Figure 2 and recorded in the history management database 15. Management information such as the amount of radioactive material in each nuclear fuel material, nuclide composition ratio, and work and processing information between and within management areas is handled as individual management information for the nuclear fuel material.

[0034] By linking the management information of nuclear fuel material in a primary container with the management information of nuclear fuel material in other primary containers before the work that led to the state of that primary container was carried out, it becomes possible to perform integrated management that integrates the individual information management and history management of nuclear fuel material.

[0035] 6 are management identification information that identify the combination of nuclear fuel material before and after the composition change. The history management internal identification number 151 focuses on the primary container as the unit of history management, and is assigned across the management areas in ascending order of the work implementation date 109 and the work implementation time 110 to the combination of nuclear fuel material before and after the composition change, that is, the nuclear fuel material in the primary container identified by the primary container identification number 103 in the management area identified by the management area identification number 105, and the nuclear fuel material in the primary container identified by the primary container identification number 134 in the management area identified by the management area identification number 131 before the composition change, as the combination of nuclear fuel material before and after the composition change, with the primary container identification number 103 in the management area identified by the management area identification number 105.

[0036] For example, for nuclear fuel material whose control area identification number 105 is A200 and whose primary container identification number 103 is I201, before the composition change, the combinations were nuclear fuel material whose control area identification number 131 is A100 and whose primary container identification number 134 is I101, nuclear fuel material whose control area identification number 131 is A100 and whose primary container identification number 134 is I102, nuclear fuel material whose control area identification number 131 is A150 and whose primary container identification number 134 is I151, and nuclear fuel material whose control area identification number 131 is A700 and whose primary container identification number 134 is I701, and the history management internal identification number 151, which is management identification information that uniquely defines these combinations, is 9.

[0037] Furthermore, among the nuclear fuel materials before the composition change, for those whose control area identification number 105 is A100 and whose primary container identification number 103 is I101, before the composition change, the nuclear fuel material was identified as having a control area identification number 131 of RA999 and a primary container identification number 134 of RI996, and the history management internal identification number 151, which is management identification information that uniquely defines this combination, is 3.

[0038] Furthermore, if the nuclear fuel material identified by the control area identification number 105 of A200 and the primary container identification number 103 of I201 is taken as the reference, then the nuclear fuel material identified by the control area identification number 105 of A100 and the primary container identification number 103 of I101 is the nuclear fuel material before the composition of the reference nuclear fuel material changed, and the previous history management internal identification number 152 is 3. Note that nuclear fuel material other than the nuclear fuel material mentioned above in Figure 6 is also managed in the same way.

[0039] Here, the management information for nuclear fuel material identified by the management area identification number 105 being RA999 and the primary container identification number 103 being RI996 is managed individually in a management area outside the MOX fuel assembly fabrication plant, and therefore the management identification information management function unit 14 in the nuclear fuel material management system 10 of the MOX fuel assembly fabrication plant sets the history management internal identification number 151 to 0 for the sake of convenience. When management information outside the MOX fuel assembly fabrication plant is input into the nuclear fuel material management system 10 of the MOX fuel assembly fabrication plant by the nuclear material management information registration function unit 11 shown in Figure 2, history management across plants becomes possible.

[0040] Furthermore, the nuclear fuel material identified by the control area identification number 105 as A400 and the primary container identification number 103 as I499, which is before the composition change of the nuclear fuel material, is identified by the control area identification number 131 as AAA and the primary container identification number 134 as III, and is the nuclear fuel material that was handled before the fabrication of the MOX fuel assemblies shown in Figure 1 and was managed by the nuclear fuel material management system 10, and for convenience, the previous internal history management identification number 152 is Z. The history from the receipt of the nuclear fuel material that is the basis of this nuclear fuel material with the internal history management identification number 152 Z to the creation of this nuclear fuel material is also managed in the same way.

[0041] In Figure 6, by managing the identification numbers 105, 103, 131, and 134 that uniquely identify nuclear fuel materials at each stage of MOX fuel assembly manufacturing in association with the date and time of work performed on each nuclear fuel material, it is possible to achieve traceability management that takes into account tracing from downstream to upstream processes, quality control such as yield at each stage, and manufacturing status management, and it is possible to strictly manage the composition, mass, etc. of the nuclear fuel materials handled.

[0042] Figure 7 shows a schematic diagram of an example of traceability management based on the history management internal identification number 151, which shows the results of extracting the history of the process that nuclear fuel material received at a MOX fuel assembly manufacturing plant went through before being released, and is provided by the history information provision function unit 17 in Figure 2.

[0043] The numbers (0, Z, 1, etc.) shown in Figure 7 are the internal history management identification numbers 151 and 152 in Figure 6. Management using the internal history management identification numbers 151 and 152 makes it possible to grasp the history of composition changes from the nuclear fuel material with internal history management identification number 151 of 0, which corresponds to the source of the nuclear fuel material and is the starting point of the history management, to the nuclear fuel material with internal history management identification number 151 of 16, 26, 27, and 28, which are the end points of the manufacturing process of MOX fuel assemblies in the range shown in Figure 1.

[0044] For example, the history information providing function unit 17 can search for history information in the history management database 15 based on the history management internal identification number 151 as management identification information for the nuclear fuel material, and extract the history of the nuclear fuel material before or after a certain point in time. Specifically, the history information providing function unit 17 can extract from the history management database 15 the nuclear fuel material before numbers 9 and 2 and the nuclear fuel material before that of number 12 in Figure 7, as well as the nuclear fuel material after numbers 13, 15, 16 and the nuclear fuel material after that.

[0045] In addition, the nuclear fuel material whose previous history management internal identification number 152 in Figure 6 is set to Z for convenience is nuclear fuel material that was handled before the production of the MOX fuel assembly shown in Figure 1 and was managed by the nuclear fuel material management system 10, and the history from the receipt of the nuclear fuel material that is the source of this nuclear fuel material to its creation is also managed in the same way.

[0046] As shown in Figure 2, in the nuclear fuel material management system 10 configured as described above, the nuclear material management information registration function unit 11 registers and stores the management information of the nuclear fuel material from electronic data (nuclear material data 1), paper data (documents 4), and the lower-level system 7 in the inventory management database 12, the nuclear material management information association function unit 13 associates the management information of the nuclear fuel material before and after the composition change, and the management identification information management function unit 14 registers and stores this associated management information before and after the composition change as history information in the history management database 15, and the above management information is managed so that it can be searched using the inventory information provision function unit 16, and the above history information is managed so that it can be searched using the history information provision function unit 17.

[0047] As configured as above, the first embodiment provides the following effects (1) and (2). (1) The nuclear fuel material management system 10 shown in Fig. 2 enables integrated management of nuclear fuel material by integrating individual management for each management area using management information (Figs. 3 and 4) stored in an inventory management database 12 for nuclear fuel material used to manufacture MOX fuel assemblies with history management using history information (Figs. 5 and 6) stored in a history management database 15, which associates management information on the nuclear fuel material before and after composition changes. Therefore, it is possible to manage the traceability of the composition change process that nuclear fuel material used to manufacture MOX fuel assemblies has undergone from receipt to delivery.

[0048] (2) The operation terminal 18 shown in Fig. 2 is configured to be able to simultaneously modify multiple pieces of management information for nuclear fuel material that are associated with each other before and after a change in the composition of the nuclear fuel material, based on the history management internal identification numbers 151, 152 that serve as management identification information in the history information for the nuclear fuel material stored in the history management database 15. For example, when the operation terminal 18 modifies the management information for the nuclear fuel material identified by number 17 in Fig. 7, it is also possible to simultaneously modify the management information for nuclear fuel material identified by numbers 15, 12, 7, 4, 19, 21, 25, 28, etc. in Fig. 7 that are associated with each other before and after the change in the composition of the nuclear fuel material. As a result, when it is necessary to modify management information such as the nuclide composition ratio, nationality information, and amount of radioactive material of the nuclear fuel material, the operation terminal 18 can be used to simultaneously modify the management information for multiple related nuclear fuel materials, going back to the time of receipt of the nuclear fuel material.

[0049] [B] Second embodiment (Fig. 8) 8 is a block diagram showing the configuration of a nuclear fuel material control system according to the second embodiment. In this second embodiment, the same parts as in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the description thereof will be simplified or omitted.

[0050] The nuclear fuel material management system 20 of this second embodiment differs from the first embodiment in that it is further configured to include a definition information management registration function unit 21 as definition information registration means for registering definition information for relating management information to each other in response to changes or differences in management items, formats, etc. in the management information of nuclear fuel material in the information management database 22, and the information management database 22 for storing the definition information.

[0051] In other words, when the management items and formats of the various electronic data (nuclear material data 1), paper data (documents 4), and management information in the lower-level system 7 input into the nuclear material management information registration function unit 11 of the nuclear fuel material management system 20 are different, the definition information management registration function unit 21 inputs information from the electronic data 8 or paper data 9 to relate the management items and formats of these management information, and registers and stores this information in the information management database 22 as definition information.

[0052] As configured as above, the second embodiment provides the following effect (3) in addition to the effects (1) and (2) of the first embodiment.

[0053] (3) The definition information management registration function unit 21 is configured to register definition information for linking management information with other management information, corresponding to changes or differences in the management items or formats in the management information of nuclear fuel material, in the information management database 22, and operate it. Therefore, even if the management items or formats of the management information of nuclear fuel material in the electronic data (nuclear material data 1), paper data (documents 4), or lower-level system 7 change, the definition information management registration function unit 21 can appropriately respond to the management information having the changed management items, etc.

[0054] [C] Third embodiment (Fig. 9) 9 is a block diagram showing the configuration of a nuclear fuel material control system according to the third embodiment. In this third embodiment, parts that are similar to those in the first and second embodiments are given the same reference numerals as those in the first and second embodiments, and the description thereof will be simplified or omitted.

[0055] The nuclear fuel material management system 30 of this third embodiment differs from the second embodiment in that the nuclear material management information registration function unit 11, inventory information provision function unit 16 and history information provision function unit 17, which serve as input / output means, are configured to exchange management information and history information with the reprocessing plant nuclear fuel material management system 31, which manages nuclear fuel material at the reprocessing plant.

[0056] That is, in the nuclear fuel material control system 30, the nuclear material control information registration function unit 11 registers and stores the nuclear fuel material control information from electronic data (nuclear material data 1), paper data (documents 4), lower-level systems 7, and reprocessing plant nuclear fuel material control system 31 in the inventory control database 12, the nuclear material control information association function unit 13 associates this control information of the nuclear fuel material before and after a change in composition, and the management identification information management function unit 14 registers and stores this associated control information before and after the change in composition as history information in the history control database 15, and the above control information is managed so that it can be searched using the inventory information provision function unit 16, and the history information is managed so that it can be searched using the history information provision function unit 17. Furthermore, the inventory information provision function unit 16 provides the nuclear fuel material control information, and the history information provision function unit 17 provides the nuclear fuel material history information to the reprocessing plant nuclear fuel material control system 31.

[0057] As configured as above, the third embodiment also achieves the same effects as the effects (1) to (3) of the first and second embodiments, and also achieves the following effect (4).

[0058] (4) The nuclear material management information registration function unit 11, inventory information provision function unit 16, and history information provision function unit 17 are configured to exchange management information and history information with the reprocessing plant nuclear fuel material management system 31, which manages nuclear fuel material at the reprocessing plant. Therefore, the nuclear fuel material management system 30 can replace physical exchanges of electronic data (nuclear material data 1) and paper data (documents 4) with data linkage between the reprocessing plant nuclear fuel material management system 31 and the nuclear fuel material management system 30, thereby improving the reliability of information transmission and preventing human error.

[0059] [D] Fourth embodiment (Figs. 10 and 11) Fig. 10 is an explanatory diagram showing the configuration of the entire nuclear fuel cycle to which a nuclear fuel material control system according to the fourth embodiment is applied. Also, Fig. 11 is a block diagram showing the configuration of a nuclear fuel material control system according to the fourth embodiment. In this fourth embodiment, parts that are similar to those in the first to third embodiments are given the same reference numerals as in the first to third embodiments, and the description thereof will be simplified or omitted.

[0060] The nuclear fuel material management system 40 of this fourth embodiment differs from the third embodiment in that it is further configured to have an integrated management information providing function unit 42 as an integrated management information providing means that outputs integrated management information based on the management information and history information of nuclear fuel material stored in the inventory management database 12 and the history management database 15 to a higher-level nuclear fuel material management system 41 in order to perform history management of nuclear fuel material throughout the entire nuclear fuel cycle.

[0061] The entire nuclear fuel cycle is shown in Figure 10. The nuclear fuel material control system 40 at the MOX fuel fabrication operator and the nuclear fuel material control system 51 at the reprocessing operator exchange information about nuclear fuel material with the nuclear fuel material control system 52, which manages the two operators in an integrated manner. This nuclear fuel material control system 52 exchanges information about nuclear fuel material with the nuclear fuel material control system 50 at the national / regulator. The nuclear fuel material control system 53 at the reconversion / fabrication operator, the nuclear fuel material control system 54 at the uranium fuel fabrication operator, the nuclear fuel material control system 55 at nuclear power plant operator k, and the nuclear fuel material control system 56 at another nuclear power plant operator n also exchange information about nuclear fuel material with the nuclear fuel material control system 50 at the national / regulator. The management shown in Figure 10 requires operations between the national / regulator and the operators, and between each operator, and therefore must be equipped with functions to realize management between the national / regulator and each operator.

[0062] For the purpose of history management of nuclear fuel material throughout the entire nuclear fuel cycle, the nuclear fuel material control system 40 has an integrated management information provision function unit 42 that creates integrated management information based on the management information and history information of nuclear fuel material stored in the inventory management database 12 and the history management database 15, and outputs this integrated management information to the host nuclear fuel material control system 41 by transmission. Furthermore, in the nuclear fuel material control system 40, the nuclear material management information registration function unit 11 has a function of inputting management information of nuclear fuel material from the host nuclear fuel material control system 41 by transmission, and the definition information management registration function unit 21 has a function of inputting definition information that relates these pieces of management information from the electronic data 8, paper data 9, and host nuclear fuel material control system 41, and registering it in the information management database 22, when there is a change or difference in the management items or format of the management information of nuclear fuel material between the host nuclear fuel material control system 41 and the host nuclear fuel material control system.

[0063] Therefore, in the above-mentioned nuclear fuel material control system 40, the nuclear material control information registration function unit 11 registers and stores nuclear fuel material control information from electronic data (nuclear material data 1), paper data (documents 4), the lower system 7, the reprocessing plant nuclear fuel material control system 31, and the upper-level nuclear fuel material control system 41 in the inventory control database 12. The nuclear material control information association function unit 13 associates this management information of the nuclear fuel material before and after the composition change, and the management identification information management function unit 14 registers and stores this associated management information before and after the composition change as history information in the history control database 15. The above management information is managed in a searchable manner using the inventory information provision function unit 16, and the history information is managed in a searchable manner using the history information provision function unit 17. Furthermore, the inventory information provision function unit 16 provides the nuclear fuel material control information to the reprocessing plant nuclear fuel material control system 31, and the history information provision function unit 17 provides the nuclear fuel material history information. Furthermore, the integrated management information provision function unit 42 provides the integrated management information to the upper-level nuclear fuel material control system 41.

[0064] As configured as above, the fourth embodiment achieves the effects (1) to (4) of the first to third embodiments, and also achieves the following effect (5).

[0065] (5) The integrated management information providing function unit 42 is configured to create integrated management information based on the management information and history information of nuclear fuel material stored in the inventory management database 12 and the history management database 15, and to output this integrated management information to the upper-level nuclear fuel material control system 41. Therefore, the upper-level nuclear fuel material control system 41, which includes the top-level nuclear fuel material control system 50 (Fig. 10), manages the entire nuclear fuel cycle using the integrated management information input from the nuclear fuel material control system 40, thereby enabling appropriate coordination of information on nuclear fuel material between the nuclear fuel material control systems 50, 51, 52, 53, 54, 55, and 56 of each operator.

[0066] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, changes, and combinations can be made without departing from the spirit of the invention. Furthermore, such substitutions, changes, and combinations are included in the scope and spirit of the invention, and are also included in the inventions and their equivalents as set forth in the claims. [Explanation of symbols]

[0067] 10...Nuclear fuel material management system, 11...Nuclear material management information registration function unit (nuclear material management information registration means), 12...Inventory management database (management information database), 13...Nuclear material management information association function unit (nuclear material management information association means), 14...Management identification information management function unit (management identification information management means), 15...History management database (history information database), 16...Inventory information provision function unit (information provision means), 17...History information provision function unit (information provision means), 18...Operation terminal (modification means), 20...Nuclear fuel material management system, 21...Definition information management registration function unit (definition information registration means), 30...Nuclear fuel material management system, 31...Reprocessing plant nuclear fuel material management system, 40...Nuclear fuel material management system, 41...Higher nuclear fuel material management system, 42...Integrated management information provision function unit (integrated management information provision means), 151...History management internal identification number (management identification information)

Claims

1. a management information database that stores management information for the nuclear fuel material in combination with identification information for the nuclear fuel material; a history information database that stores history information of the nuclear fuel material, including management identification information that identifies the combination of the nuclear fuel material before and after the composition change; and an information providing means for searching the management information of the nuclear fuel material from the management information database based on the identification information and the history information of the nuclear fuel material from the history information database based on the management identification information, and outputting the information to an external device, A nuclear fuel material management system configured to be able to grasp and manage the history of the nuclear fuel material before and after a change in composition.

2. a nuclear material management information registration means for registering and storing management information of nuclear fuel material in the management information database; a nuclear material management information associating means for associating and identifying a combination of the nuclear fuel material before and after a composition change based on the management information of the nuclear fuel material; The nuclear fuel material management system described in claim 1, further comprising a management identification information management means for creating management identification information that identifies the combination of nuclear fuel materials identified by the nuclear material management information association means, and registering and storing historical information of the nuclear fuel materials including this management identification information in a historical information database.

3. 3. A nuclear fuel material management system as described in claim 1 or 2, wherein the information providing means is configured to search for historical information in a historical information database based on management identification information of the nuclear fuel material and to extract the history of the nuclear fuel material before and after a certain point in time.

4. A nuclear fuel material management system as described in claim 1 or 2, further comprising a modification means capable of simultaneously modifying management information for multiple nuclear fuel materials that are associated with each other before and after a change in the composition of the nuclear fuel material based on the management identification information of the nuclear fuel material.

5. A nuclear fuel material management system as described in claim 1 or 2, further comprising: a definition information registration means for registering definition information for relating the management information to each other in response to changes or differences in management items in the management information; and an information management database for storing the definition information.

6. 3. The nuclear fuel material control system according to claim 1, further comprising an input / output means for exchanging control information and history information of the nuclear fuel material with the nuclear fuel material control system.

7. A nuclear fuel material management system as described in claim 1 or 2, further comprising an integrated management information providing means for creating integrated management information based on the management information and the history information and outputting the integrated management information to the higher-level nuclear fuel material management system.

8. a step of registering and storing management information including identification information of the nuclear fuel material in a management information database by a nuclear material management information registration means; a step of creating management identification information for identifying the combination of the nuclear fuel material before and after the composition change by a management identification information management means, and registering and storing history information of the nuclear fuel material including this management identification information in a history information database; A nuclear fuel material management method characterized by grasping and managing the history of the nuclear fuel material before and after a change in composition.

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