Safety analysis of nitride fuel core toward self-consistent nuclear energy system

A concept of nitride FBR core and recycling system toward Self-Consistent Nuclear Energy System (SCNES) bas been investigated about the core characteristics and the incineration of the long lived fission products (FPs), the problem of ¹⁴C. In this study, we look for 'self-controllability' under intact core geometry and specifications of core toward SCNES. Self-controllability is the passive shutdown capability induced by the inherent negative feedbacks at the unscrammed events such as the Anticipated Transients without Scram (ATWS). The characteristics of renewed core is recalculated and by transient analysis several specifications are compared in the point of the maximum temperature at ULOF (Unprotected Loss of Flow) and UTOP (Unprotected Transients Over Power)