Development of evaluation methods for decay heat removal by natural circulation under transient conditions, 11; Sodium test for decay heat removal by natural circulation, 1

Kamide, Hideki ; Kimura, Nobuyuki; Hayashi, Kenji; Miyakoshi, Hiroyuki; Watanabe, Osamu*

Sodium experiments were carried out for the natural circulation decay heat removal in a large scale sodium cooled fast reactor (JSFR) developed by FaCT project. The purposes of the sodium experiments are to grasp the transient characteristics of soium flow rate and component temperatures at the start-up of natural circulation decay heat removal system. The experimental results showed that natural circulation developed smoothly and the decay heat in the core was removed steadily.