使用済み燃料プールの事故時の安全性向上に関する研究,9; 3次元解析手法によるBWR燃料の定常熱伝達解析手法による温度評価

Study on improvement of safety for accident conditions in spent fuel pool, 9; Temperature evaluations of BWR fuels by three dimensional steady-state heat transfer analyses

後藤 大輔*; 東條 匡志*; 小林 謙祐*; 根本 義之  ; 加治 芳行  

Goto, Daisuke*; Tojo, Masayuki*; Kobayashi, Kensuke*; Nemoto, Yoshiyuki; Kaji, Yoshiyuki

BWR使用済燃料ラック体系の定常熱伝達解析手法を用いて、シビアアクシデント解析手法MAAPとの比較、及び使用済燃料の配置に依存した燃料被覆管温度評価を行い、使用済燃料プール(SFP)水位低下時の燃料温度抑制に有効な配置の考え方を検討した。

Steady-state heat transfer analysis method for the BWR spent fuel rack system was adopted to evaluate the cladding temperature in spent fuel pool accident condition. The cladding temperature seems to depend on spent fuel distribution, and the evaluation results were compared with the results obtained by using the MAAP. Ideas for the deployment of the fuels to prevent temperature elevation during the spent fuel pool water level decrease will be discussed.