사용후핵연료 건식저장시스템 작업절차 및 작업형태 분석
Analysis of Spent Fuel Dry Storage System Work Procedures and Work Patterns
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The Second High Level Radioactive Waste Management Basic Plan for Dry Interim Storage andInterim Storage of Spent Nuclear Fuel has been released. The Dual Purpose Canister (DPC) has emerged as away to avoid repeating the mistakes made by leading countries in spent fuel management by not considering thelinkages between management steps. From the worker’s point of view, the dose is likely to be influenced by theoperating procedures and work patterns of the dry storage facility. It is necessary to conduct a survey on the operatingprocedures and work patterns of each dry storage method before evaluating the exposure dose. The purpose of thisstudy is to investigate and analyze the work procedures and work patterns of commercially available DPC-basedspent fuel dry storage facilities in other countries. For this purpose, the dry storage systems commercialized overseaswere first categorized into 1) concrete overpack, 2) vertical storage module, and 3) metal overpack. The HI-STORM100, NAC-UMS, VSC-24, and Fuel Solutions systems were selected as the subjects of the study for the concreteoverpack method. The HI-STORM UMAX system was selected for the vertical storage module method, and theHI-STAR 100 system was selected for the metal overpack method. To analyze the operating procedures and workpatterns, the loading and unloading procedures described in the Final Safety Analysis Report (FSAR) for each systemwere analyzed, as well as the time and personnel required for each task. The results showed that, on average, theloading procedure requires 13.4 more steps and 644.5 more minute than the unloading procedure, although there aredetailed differences in operating procedures and work patterns among dry storage systems. The results of this studycan be used as a basis for the radiological impact assessment of workers during the operation of spent fuel dry storagefacilities.
Abstract
The Second High Level Radioactive Waste Management Basic Plan for Dry Interim Storage andInterim Storage of Spent Nuclear Fuel has been released. The Dual Purpose Canister (DPC) has emerged as away to avoid repeating the mistakes made by leading countries in spent fuel management by not considering thelinkages between management steps. From the worker’s point of view, the dose is likely to be influenced by theoperating procedures and work patterns of the dry storage facility. It is necessary to conduct a survey on the operatingprocedures and work patterns of each dry storage method before evaluating the exposure dose. The purpose of thisstudy is to investigate and analyze the work procedures and work patterns of commercially available DPC-basedspent fuel dry storage facilities in other countries. For this purpose, the dry storage systems commercialized overseaswere first categorized into 1) concrete overpack, 2) vertical storage module, and 3) metal overpack. The HI-STORM100, NAC-UMS, VSC-24, and Fuel Solutions systems were selected as the subjects of the study for the concreteoverpack method. The HI-STORM UMAX system was selected for the vertical storage module method, and theHI-STAR 100 system was selected for the metal overpack method. To analyze the operating procedures and workpatterns, the loading and unloading procedures described in the Final Safety Analysis Report (FSAR) for each systemwere analyzed, as well as the time and personnel required for each task. The results showed that, on average, theloading procedure requires 13.4 more steps and 644.5 more minute than the unloading procedure, although there aredetailed differences in operating procedures and work patterns among dry storage systems. The results of this studycan be used as a basis for the radiological impact assessment of workers during the operation of spent fuel dry storagefacilities.
참고문헌 (24)
- 2nd High Level Radioactive Waste Management Basic Plan, "MOTIE", ~ (2021)
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- Analysis and design of dry cask storage pads for plant hatch ISFSI, "IAEA", ~ (2001)
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