Loss of flow accident and its mitigation measures for nuclear systems with SCWR-M |
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| Authors: | Zhihong Xu Dong Hou Shengwei Fu Yanhua Yang Xu Cheng |
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| Affiliation: | 1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Navy University of Engineering, Hubei Wuhan 430000, China;3. Institute of Fusion and Nuclear Technology, Karlsruhe Institute of Technology, Vincenz Priessnitz Str. 3, 76131 Karlsruhe, Germany |
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| Abstract: | Based on a revised version of RELAP5, which can be used for super-critical pressure calculation, a model of mixed spectrum SCWR (SCWR-M) system is established. To analyze the transient behavior of SCWR-M and develop mitigation measures during loss of flow accident (LOFA), some important parameters, e.g. reactor coolant pump (RCP) coast-down time, Reactor Pressure Vessel (RPV) upper water volume and safety injection flow, etc., are chosen for the parametric analysis. The results achieved so far indicate that the SCWR-M system design is feasible and promising. Three important mitigation measures for LOFA of SCWR-M are derived from the results: RCP coast-down time of more than 15 s, RPV upper water volume of more than 27 m3, and safety injection of more than 5% of the system design flow. |
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| Keywords: | Mixed spectrum supercritical water cooled reactor (SCWR-M) Loss of flow accident Mitigation measures |
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