Preliminary Level 1 Probabilistic Safety Assessment for China LEAd-based Research Reactor

摘要

China LEAd-based research Reactor (CLEAR-I) is a pool-type advanced fast breeder research reactor, using liquid Lead-Bismuth Eutectic alloy (LBE) as coolant. CLEAR-I has dual-modes operation capabilities to test critical LBE cooled fast reactor and accelerator driven subcritical reactor technology, which cause great challenge for the accident analysis and the development of Probabilistic Safety Assessment (PSA) model. A preliminary level 1 PSA was completed for CLEAR-I, different accident sequences for two operation modes were modeled in event trees, and passive systems reliability were included in PSA model. The risk of normal operation of CLEAR-I was quantified using generic reliability data, and was found to be very low for both critical and subcritical operation modes.