Abstract
The China initiative Accelerator Driven System (CiADS) is a nuclear energy system that can perform transmutation of long-lived radioactive nuclides in spent fuel. In this article, the CiADS reactor core loaded with nitride fuel was studied by using SAS4A/SASSYS-1 code. The preliminary simulation results of the unprotected transient over power (UTOP) at BOC (beginning of cycle) and EOC (end of cycle) showed that the maximum reactivity insertion to avoid cladding rupture was 500pcm. For unprotected loss of flow (ULOF), the fuel and cladding failures will not happen in all postulated ULOF cases according to our simulations.
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