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논문 기본 정보

자료유형
학술저널
저자정보
Kano Tatsuya (Graduate School of Advanced Science and Engineering, Waseda University) Ono Rintaro (Graduate School of Advanced Science and Engineering, Waseda University) Furuya Masahiro (Graduate School of Advanced Science and Engineering, Waseda University)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology Vol.56 No.7
발행연도
2024.7
수록면
2,474 - 2,479 (6page)
DOI
10.1016/j.net.2024.02.005

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초록· 키워드

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In-Vessel Retention (IVR) is a key technology to retain the molten core in the reactor vessel during severe accidents of Pressurized-water reactors (PWRs). In order to gain the safety margin of IVR, it is crucial to enhance the critical heat flux (CHF) of the reactor vessel, which is submerged in a water pool. To enhance the CHF, we have designed and additive-manufactured porous grid plates with a 3-D printer for design flexibility. We measured the CHF for the porous grid plate on the boiling heat transfer surface and found that the CHF was enhanced by 50 % more than that of the bare surface. The CHF enhanced more with a narrower grid pitch and a lower grid height. The visual observation study revealed that the vapor film was formed at the bottom of the grid plate.

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