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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.9
- 수록면
- 2,878 - 2,887 (10page)
- DOI
- https://doi.org/10.1016/j.net.2021.03.020
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초록· 키워드
오류제보하기
As the amount of fission product released from ISLOCA was overestimated because of conservative assumptionsin the past, several studies have been recently conducted to evaluate the actual releaseamount. Among several pathways for the ISLOCA, most studies were focused on the pathway with thehighest possibility. However, different ISLOCA pathways may have different fission product releasecharacteristics. In this study, fission product behavior was analyzed for various pathways at the Westinghousetwo-loop plant using MELCOR. Four pathways are considered: the pipes from a cold leg, from adowncomer, from a hot leg to the outlet of RHR heat exchanger, and the pipe from the hot leg to the inletof RHR pump (Pathway 1e4). According to the analysis results, cladding fails at around 2.5 h in Pathways1 and 2, and on the other hand, about 3.3 h in Pathways 3 and 4 because the ISLOCA pathways affect thesafety injection flow path. While the release amount of cesium and iodine ranges between 20 and 26% inPathways 1 to 3, Pathway 4 allows only 5% to the environment because the break location is submerged.
Also, as more than 90% of cesium released to the environment passes through the personnel door,reinforcing the pressure capacity of the doors would be a significant factor in the accident managementof the ISLOCA.
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