Study on the Influence of MSLB Accident on Main Control Room Dose
Abstract: In this paper, main steam line break (MSLB) accident dose assessment method on AP1000 is ela-borated, and three types of radiation source term analysis models are expounded, involving the primary coolant initial activity release, secondary coolant initial activity release and iodine spike release. Based on the AP1000 coastal site, the main control room (MCR) personal doses are eva-luated, during operation of emergency habitability system (VES) mode and nuclear island nonra-dioactive ventilation system (VBS) supplemental air filtration mode, respectively. All the above results can meet the requirement of HAD 002/01-2010, and the main control room has good habi-tability. Meanwhile, detailed parameter sensitivity analysis is performed for MCR dose based on VES mode. Research results have shown that the initial secondary iodine and alkali metals release makes the largest contribution to MCR dose, and the MCR dose mainly results from the VBS normal operation mode activity introduction during the period of 0.052~4 h. The blowdown period of SG, beginning time of VES mode, and recirculation flow are the sensitive parameters to MCR dose, but the in-leakage rate and auxiliary fan flow are insensitive parameters. These research conclusions could provide necessary theory reference to MCR design optimization.
文章引用: 孙大威 , 潘楠 , 张姗姗 (2015) MSLB事故对主控制室剂量影响研究。 核科学与技术， 3， 126-134. doi: 10.12677/NST.2015.34018
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