Availability evaluation of passive reactor shut-down system in partial load operating conditions of the next generation sodium-cooled fast reactor

Saito, Hiroyuki*; Yamada, Yumi*; Oyama, Kazuhiro*; Matsunaga, Shoko*; Kubo, Shigenobu; Yamano, Hidemasa

no journal, , 

The effectiveness of self-actuated shutdown structure (SASS) for representative LOF-type ATWS event in a low-power operation was confirmed after the definition of a response time by three-dimensional thermal hydraulics analysis for its modified structure in order to improve the response characteristics of SASS.