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KMID : 0371819970290040336
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Nuclear Engineering and Technology
1997 Volume.29 No. 4 p.336 ~ p.347
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An Experimental Study on the Transient Interaction Between High Temperature Thermite Melt and Concrete
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Nho, Ki-Man
Kim, Jong-Hwan/Kim, Sang Baik/Shin, Ki-Yeol/Chung, Mo
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Abstract
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During postulated severe accidents in light Water Reactors, molten corium, which was ejected from the reactor vessel bottom, may erode the concrete basemat of the containment and there by threaten the containment integrity. This study experimentally examines the molten core-concrete interaction (MCCI) using 20kg of themzite melt We+ A600 and the concrete, used in Yonggwang Nuclear Power Plant Units 3 and 4 (YGN 3 & 4) in Korea The measured data are the downward heat fluxes, concrete erosion rate, gases and particle generation rates during MCCI. Transient results were compared with those of TURCIT experiment conducted by SNL in USA The peak downward heat flux to the concrete was measured to be about 21MW/m2. The initial concrete erosion rate was 175cm per hour, decreasing to 30cm per hour. It was shown from the post-test that the erosion was progressed downward up to 18mm in the concrete slug.
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KEYWORD
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