A101 Development of Multi-Physics Numerical Simulation System for Sodium-water Reaction Phenomena in Steam Generator of Sodium-cooled Commercial Fast Reactors : R&D Plan

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  • A101 高速実用炉蒸気発生器における伝熱管破損事象評価手法の開発 : 研究全体計画(OS8 高速増殖炉の蒸気発生器(Na-水反応))

Description

When a heat transfer tube is failed in a steam generator (SG) of a sodium-cooled fast reactor (SFR), pressurized water and/or water vapor leaks into liquid sodium surrounding the tube and forms a reacting jet with high temperature. This reacting jet might cause the secondary failure of adjacent heat transfer tubes due to wastage or over-heating tube rapture resulting in undesirable development of the accident. Therefore, the sodium-water reaction phenomenon (SWR) is one of most important issues for the design and safety assessment of SFRs. This paper describes the R&D plan of a new multi-physics numerical simulation system which is based on mechanistic and theoretical modeling of the SWR rather than empirical modeling and can contribute to detailed and quantitative evaluations of the SWR in any types of SGs including commercial SFRs.

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