最適な原子炉保全のための燃料リークに起因するリスク評価


英字タイトル:
Risk assessment of reactor shut-down due to fuel failure for sufficient management of nuclear reactors
著者:
山本 泰功 Yasunori YAMAMOTO 中筋 俊樹 Toshiki NAKASUJI 森下 和功 Kazunori MORISHITA
発刊日:
公開日:
カテゴリ: 第10回
キーワードタグ:

概要

Continuous efforts should be made to keep the safety of light-water reactors, not only at the design and construction phases but also at the operation phase. Fuel cladding is a key barrier in containing fission product. However, fuel failures yet occur in operating nuclear power plants, often leading to reactor shutdown based on the conservative, sometimes too conservative, judgment. Therefore, an appropriate judgment of how to treat the fuel failure is required to achieve reasonable management of reactors. In the present study, the methodology to evaluate the risk of reactor shut-down due to fuel failures has been developed by using computational simulation. Our calculation results have indicated that the risk curve has a peak which depends on reactor managements. The risk assessment will contribute to realize more effective management of fuel failure for further plant safety.


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