Fundamental research on fission product chemistry, 5; On the release and transportation behavior of strontium under an LWR severe accident

Miwa, Shuhei  ; Miyahara, Naoya; Suzuki, Eriko   ; Nakajima, Kunihisa  ; Osaka, Masahiko  

The effects of atmosphere on the release and transport behavior of strontium (Sr) in the light water reactor severe accident (SA) was discussed based on the results calculated by release model which can evaluate the influence of atmosphere and the chemical equilibrium calculation. Under the steam starvation atmosphere condition, there is possibility that non-volatile Sr in the steam atmosphere is significantly released from fuel, while the amount of transport into the primary containment vessel is suppressed.