한국해양대학교

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증기 폭발에 의한 원자로 하부 헤드의 건정성에 관한 연구

Title
증기 폭발에 의한 원자로 하부 헤드의 건정성에 관한 연구
Alternative Title
Structural Analysis for the Lower Head of Nuclear Reactor under In-Vessel Vapor Explosion Loads
Author(s)
석상군(XiShangjun)
Publication Year
2011
Publisher
한국해양대학교 대학원
URI
http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002175901
http://repository.kmou.ac.kr/handle/2014.oak/10227
Abstract
The objective of this paper is to assess the lower head of nuclear reactor under the in-vessel vapor explosion load. Firstly, the calculated explosion pressure loads are applied on the lower head inner wall for 2-D model and 3-D model, respectively, to calculate the equivalent strain and membrane stress intensity
secondly, both calculated explosion pressure loads and thermal loads are imposed on the 2-D model of the lower head to calculate the equivalent stain, membrane stress intensity, and total mechanical and thermal strain. Then, the calculated strain and stress results are compared with the reference standard values of failure criteria to determine the failure probability of the lower head. All the stain and stress calculations are performed by ANSYS 11.0 Program.

The structure analysis results show that the lower head failure does not exist under the pressure value up to 118.5 MPa in vessel explosion.

The thermo-mechanical results show that the lower head failure under the pressure value up to 118.5 MPa and temperature value up to 700℃ in-vessel explosion also does

not exist. During this analysis process, the nucleate boiling crisis will not occur when the



outside wall of lower head is cooled by the saturation water at 100℃ and 0.1 MPa.
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기계공학과 > Thesis
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000002175901.pdf Download

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