Inherent Safety Characteristics of Advanced Fast Reactors

International Conference for Young Scientists, Specialists, and Postgraduates on Nuclear Reactor Physics 2016

Bochkarev, A.S.^1,2 ; Korsun, A.S.^1 ; Kharitonov, V.S.^1 ; Alekseev, P.N.^1,2

National Research Nuclear University, MEPhI (Moscow Engineering Physics Institute), Moscow, Russia^1

NRC Kurchatov Institute, Moscow, Russia^2

关键词: Hydraulic resistances;    Natural circulation;    Safety barriers;    Shutdown systems;    Thermal hydraulics;    Transient performance;    Transient process;    Varying parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/781/1/012001/pdf
DOI  :  10.1088/1742-6596/781/1/012001

来源: IOP

【 摘 要 】

The study presents SFR transient performance for ULOF events initiated by pump trip and pump seizure with simultaneous failure of all shutdown systems in both cases. The most severe cases leading to the pin cladding rupture and possible sodium boiling are demonstrated. The impact of various features on SFR inherent safety performance for ULOF events was analysed. The decrease in hydraulic resistance of primary loop and increase in primary pump coast down time were investigated. Performing analysis resulted in a set of recommendations to varying parameters for the purpose of enhancing the inherent safety performance of SFR. In order to prevent the safety barrier rupture for ULOF events the set of thermal hydraulic criteria defining the ULOF transient processes dynamics and requirements to these criteria were recommended based on achieved results: primary sodium flow dip under the natural circulation asymptotic level and natural circulation rise time.