Assumption of Severe Accident Management for Chinese Third Generation Nuclear Power Units

After the accident in Fukushima nuclear power plant, it is more often to adopt a combination of active and passive accident mitigation systems in Chinese 3 rd generation nuclear power units, compared with the 2 nd generation plus nuclear power unit（M310）. Chinese 3 rd generation nuclear power units adopt a number of optimization design and improvement are adopted.The core damage frequency（CDF） and large-scale radioactivity release frequency（LRF） of the Chinese 3 rd generation nuclear power unit is lower than that of the M310. What’s more, the accident mitigation capacity of Chinese 3 rd generation unit is greater in dealing with severe accidents. For the architecture of severe accident management guideline（SAMG） in the 3 rd generation units, we can learn from the WOG（Westinghouse Owner Group）’s SAMG systems, which are used in 2nd-plus improved units（M310）. After SAMG’s structures have been optimized, the severe accident management of the 3 rd generation units will be improved greatly both in hardware and software.