Dynamic Probabilistic Risk Assessment Based Response Surface Approach for FLEX and Accident Tolerant Fuels for Medium Break LOCA Spectrum

Energies

Robby Christian¹  Jinkyun Park²  Jaewhan Kim²  AsadUllah Amin Shah³  HyunGook Kang³  Junyung Kim³ 

[1] Idaho National Laboratory, Idaho Falls, ID 83415, USA;Korea Atomic Energy Research Institute, Daedeok-daero 989 Beon-gil, Yuseong-gu, Daejoen 34057, Korea;Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA;

关键词: accident tolerant fuel;    response surface;    dynamic risk assessment;    multilayered silicon carbide;    iron-chromium-aluminum;    chromium-coated zirconium;   

DOI  :  10.3390/en14092490

来源: DOAJ

【 摘 要 】

After the Fukushima Daiichi Accident, the safety features such as accident tolerant fuel (ATF) and diverse and flexible coping strategies (FLEX) for existing nuclear fleets are being investigated by the US Department of Energy under the Light Water Reactor Sustainability Program. This research is being conducted to quantify the risk-benefit of these safety features. Dynamic probabilistic risk assessment (DPRA)-based response-surface approach has been presented to quantify the FLEX and ATF benefits by estimating the risk associated with each option. ATFs with multilayered silicon carbide (SiC), iron-chromium-aluminum, and chromium-coated zirconium cladding were considered in this study. While these ATF candidates perform better than the current zirconium cladding (Zr), they may introduce additional failure modes in some operating conditions. The fuel failure analysis modules (FAMs) were developed to investigate ATF performance. The dynamic risk assessments were performed using RAVEN, a DPRA tool, coupled with RELAP5 and FAMs. A cumulative distribution function-based index provided a mean of comparing the benefits of safety enhancements. For medium break loss of coolant accidents, FLEX operational timing window for each fuel type was estimated. Among these ATF candidates, SiC-type ATF was the most beneficial candidate for an increased safety margin than Zr-based fuel and was found to complement FLEX strategies in terms of risk and coping time.

【 授权许可】

Unknown