Preliminary Neutronic Study of An MIT Reactor Driven Fluoride-salt-cooled Sub-critical System

摘要

The proposed design and neutronic analysis of an MITR driven fluoride-salt-cooled sub-critical system is presented in this paper. The neutronic performance of the proposed system is summarized as follows: 1. k_(src_cold) is generally larger than k_(src_hot) and k_(eff_cold) at the same ~(235)U enrichment level. It should be adopted as a conservative estimate for the licensing limit. 2. If licensing limit of the sub-critical system for k_(src_cold) is 0.9, the system fission power at the hot state (900 K) is expected to be above 500 kW. 3. Taking into account the compact active zone of the sub-critical driven system, 500 kW implies 15 - 20% power density of that of the reference FHR.