HTTR(高温工学試験研究炉)の新規制基準に係る適合性審査について,2; HTTRの安全上の特徴を踏まえた耐震重要度分類の見直し

Effort to pass review for checking conformity to new regulatory requirements for high temperature engineering test reactor, 2; Review of seismic design classification based on safety features of HTTR

小野 正人 ; 島崎 洋祐 ; 石塚 悦男   ; 飯垣 和彦 

Ono, Masato; Shimazaki, Yosuke; Ishitsuka, Etsuo; Iigaki, Kazuhiko

適合性審査の項目のひとつである耐震重要度分類について、設計当初に保守的に設定していた耐震重要度分類に対して、運転実績により得られた技術的知見を踏まえた安全上の特徴に着目して耐震重要度分類を見直した結果を報告する。

The seismic design classification of HTTR was conservatively classified when HTTR was constructed, however the seismic design classification was reviewed with focus on the safety features based on the technical knowledge obtained from operations and calculations. The seismic design classification is one of the issues of checking conformity reviewed by the Nuclear Regulatory Agency.