| NUCLEAR AND NEW ENERGY TECHNOLOGY |
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Safety performance of HTR-PM600 fresh fuel storage canister under drop impact |
| HAO Yuchen, WANG Jinhua, WANG Haitao, LIU Bing, LI Yue |
| Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China |
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Abstract Fresh fuel storage container is key equipment in the fuel storage system in nuclear power plants.During hoisting,it may fall directly to the ground,thus damaging the canister and leaking the fuel element due to mechanical failure.Therefore,the safety performance of a fresh fuel storage container must be verified under the drop impact.In this paper,the HTR-PM600 fresh fuel storage canister is selected as the objective,and the FEM-DEM coupling method is used to simulate the movement law of the pebble bed.Subsequently,the maximum damage to the fuel storage canister under an accidental drop impact is calculated.The result shows that the containment boundary of the new fuel storage canister will not be destroyed under the 15-m drop condition,and the floor will not be penetrated;thus,the structural design meets the safety requirements.Under impact loading,the side plate of the thin-wall canister has a 35.26-mm expansion in the radial direction due to the interface force from the pebble bed.The maximum interaction force between the fuel element and the containment boundary is 6.295 kN,far less than the crush strength of the HTR-PM fuel element.
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| Keywords
HTR-PM600
fresh fuel storage canister
pebble bed
free drop
safety analysis
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Issue Date: 03 September 2022
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2022,
Vol. 62
