A passive decay heat removal system (DHRS) has been installed on Chinese Experimental Fast Reactor (CEFR). To well predict the thermal-hydraulics behavior of DHRS in transient, an integrated model has been developed for CEFR by using OASIS code. The model included the main thermal transfer system and DHRS circuit. The transient analysis of loss of off-site power (LOSP) accident with various initial steady states has been performed. The calculation results show that the initial steady state does not essentially effect on the peak cladding temperature in the core.

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