Countermeasure against Beyond Design Basis Accident of HTTR by using fire engine

Shimazaki, Yosuke ; Jidaisho, Tatsuya; Ishii, Toshiaki ; Inoi, Hiroyuki; Iigaki, Kazuhiko 

HTTR has newly assumed Beyond Design Basis Accident (BDBA) as part of conformity assessment with the new regulatory standards and has established measures to prevent the spread of BDBA. Among these measures, to prevent the spread of BDBA caused by cooling water leaks from spent fuel storage pool, the Oarai Research Institute's fire engine was selected as an equipment to prevent the spread of BDBA, and required performances such as pumping water performance were determined. After all required performances were confirmed by inspections, the fire engine passed the operator's pre-use inspection and contributed to the restart of the HTTR operations.