Validation of CONTAIN Coade for Sodium Aerosol Behavior

Seino, Hiroshi ; Miyake, Osamu; Morikawa, Satoshi; Himeno, Yoshiaki

Evaluation of the aerosol behavior is esential in the safety analyses of the LMFBRs. This is because, in the case of a sodium leak accident, radioactive materialscould be released to the containment atmosphere, and they would behave together with the sodium aerosols during the accidents. From 1988 to 1989, PNC participatedin the Second International Sodium Aerosol Code Benchmark Study performed underthe auspices of the Commission of EC inan attempt to validate the aerosol behavior module of the CONTAIN code. The other organizations participating in the study are CEA-France, KfK-W. Germany and UKAEA-U.K. This paper describes an outline ofthe comparison between the test resultsand the calculational results made by PNC, whereas the international comparison is presented separately(Ref.1). Results revealed that the suspended aerosol mass concentration and the aerodynamic mass median diameter obtained from both the pre - and post - test calculations agreed fairly well with the test results.