부산대학교 도서관

Nuclear data plays a vital role in the design of nuclear power reactors, especially for new conceptual ones where adequate validation base does not exist. For the continuity of ssion nuclear power beyond the present day power reactors operated in an open cycle mode, it is necessary to explore the possibility of reactor designs with higher conversion, rather higher breeding potential. In this context two reactor designs in the thermal and fast spectrum have been conceived having the above desired characteristics. The thermal version called `A Thorium Breeder Reactor' (ATBR) has conversion ratio higher by about 55% compared to an LWR [1]. The fast version called the `Fast Thorium Breeder Reactor' (FTBR) considers internal blanket or fissile breeding zones and hence has a reasonably high breeding ratio of at least 1.25 [2]. In this paper we present the variations in the salient physical core characteristics of the thermal version for three different sets of nuclear data libraries based on ENDFB/VI.8, ENDFB/VII and JEFF3.1 datasets [3].