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2019 ⦽ǎႊᔍᖒ⠱ʑྜྷ⦺⫭ ⇹ĥ⦺ᚁݡ⫭ םྙ᧞ḲDevelopment of Spent Fuel Nuclear Characteristic Evaluation System
Jae-Han Kim1, Hyung-Moon Kwon1,*, Young-Suk Jung2, Young-Il Oh2, and Eun-Kyung Lee21
Korea Atomic Energy Research Institute, 111, Daedeok-daero 989beon-gil, Yuseong-gu, Daejeon, Republic of Korea
2
ACT Co., Ltd. 1434, Yuseong-daero, Yuseong-gu, Daejeon, Republic of Korea
*
1. Introduction
A research project aimed at safely transporting spent fuel (SF) stored at a post irradiation examination facility (PIEF) at KAERI to nuclear power plants (NPPs) has been performed. To achieve the safe transportation of SF from KAERI to NPPs, it is required to evaluate the accurate nuclear characteristics of SF. In this paper, we introduce a nuclear characteristic evaluation and inventory management system for SF stored at a PIEF. KAERI and Atomic Creative Technology (ACT) have developed an automated evaluation system for the nuclear characteristics of SF, which is to surpass the manual evaluation of nuclear characteristics using a code, ORNL SCALE: ORIGEN-S [1]. The system will lead to an increase in work efficiency and a reduction in human error regarding evaluations of nuclear characteristics.
2. SF Database Construction
An SF information database containing fuel design and operation histories has been created. It holds the following types of information:
plant information and SF operation cycles; fuel type and model;
fuel specification, including total uranium weight per assembly and rod, U-235 enrichment, zirconium alloy of cladding, and total weight of zirconium alloy per assembly and rod;
nuclear core design information for each plant and cycle;
fuel operation information including power history, cooling period and discharged data for each loading cycle.
3. SF Nuclear Characteristic Evaluation
System
The developed SF nuclear characteristic evaluation system is designed to:
manage SF information (C/R/U/D), evaluate nuclear characteristics of SF
evaluate nuclear characteristics of SF container in transportation cask,
generate an evaluation report, and manage system information.
3.1 Design of SF Nuclear Characteristic Evaluation System
The functional structure of the SF nuclear characteristic evaluation system is shown in Fig. 1. The system is configured to enable multiple users (clients) to share a DB server on a local network. Each user can perform information management, evaluation code execution, and result view.
Fig. 1. Functional structure of SF nuclear characteristic evaluation system.
3.2 Implementation of SF Nuclear Characteristic Evaluation System
A menu structure for the implemented functions of the SF nuclear characteristic evaluation system is shown Fig. 2. The system provides the following functions:
7UGTğU2% KAERI SNF DB Server
KSF DB UI
DBMS SNF Info. Management
SNF Design, Power History Data Management Evaluation Inventory by Transfer Container Generation Evaluation Report
SCALE/ORIGEN KSFDB
SNF Info., Plant/Cycle Info. SNF Design, Power History Evaluation Result Data
Nuclear Characteristics Evaluation of SNF Inventory Calculation of SNF
2019 ⦽ǎႊᔍᖒ⠱ʑྜྷ⦺⫭ ⇹ĥ⦺ᚁݡ⫭ םྙ᧞Ḳ
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SF Information Management
o SF assembly and rod information
o Loading plant and cycle NDR information o SF core power history
o Nuclear core design information for each plant and cycle
SF Characteristics Evaluation
o Characteristic evaluation code operation o Result view (Table/Graph)
o Evaluation report generation for SF rod Sf Transfer Package Evaluation
o SF selection for transfer package (with same evaluation reference date)
o SF package characteristics calculation o result view (Table/Graph)
o Evaluation report for SF package
)LJ VKRZV DQ H[DPSOH RI WKH V\VWHP¶V user interface for nuclear characteristic evaluation of SF rods. Fig. 4 shows a graph of radioactivity (linear scale) for a given SF nuclear characteristic evaluation UHVXOW)LJVKRZVDQH[DPSOHRIWKHV\VWHP¶V user interface for the construction of a transfer package by means of a combination of evaluated SF rods and a radioactivity (log scale) graph of SF nuclear characteristic evaluation results.
Fig. 2. Menu structure of SF nuclear characteristic evaluation system.
Fig. 3. Example of nuclear characteristic evaluation of SF
rods.
Fig. 4. Example SF nuclear characteristic evaluation results.
Fig. 5. Example of SF transportation package evaluation results.
4. Conclusion
KAERI and ACT have developed a network-based SF nuclear characteristic evaluation system. The system is convenient to use and is designed to increase the work efficiency of its users. In addition, it provides accurate SF nuclear characteristic evaluations. It will be used to evaluate the nuclear characteristics of SF stored at KAERI for the safe transportation of SF.
REFERENCES
>@ , & *DXOG ³25,*(1-S: Depletion Module to Calculate Neutron Activation, Actinide Transmutation, Fussion Product Generation, and 5DGLDWLRQ 6RXUFH 7HUPV´ 251/70-2005/39 Version 6.1 Sect. F7, (2011).
File (F)
Add Data (A)
Save Data (V) Delete Data (D) Exit Program (X) Close Window (C) SNF Info. Management Assy./Rod Info.
Nuclear Design Info. Fuel Design Info.
Power History Common Info. Management Plant/Cycle Info. User Info. Evaluation Setting SNF Basic Info. Transfer Container Info. Package Evaluation Report Package Evaluation Transfer Object Management Package Characteristics View SNF Evaluation Nuclear Character Evaluation Evaluation Result View Rod Evaluation Report
