Review of the Regulation Status of Source Term for Sodium-Cooled Fast Reactor in US

Nearly all the currently operating light water reactors in KOREA have been designed and licensed using the so-called 'TID-14844 Source Term'. Unfortunately this TID-14844 source term is unsuitable for SFRs, as the phenomena associated with the base accidents are not comparable to SFR accidents. In this study, we expect that the same source term that was used in PRISM would be applied into the source term analysis for the PGSFR. However, currently nothing is determined for the source term analysis in the PGSFR. In the early 1990s, the NRC began formally addressing the use of MSTs in advanced reactor licensing with the issuance of SECY-93-092 following a request from the Commission for a review of the state-of-the-art of source term analyses. And this regulatory source terms has been revised via progress in the state of the art. The US NRC stated an expectation for advanced reactor vendors to present MST in their license applications.