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KMID : 0896219950150010889
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Journal of Daegu Health College
1995 Volume.15 No. 1 p.889 ~ p.904
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A Study on the Soundness Evaluation of Boraflex within Hihg-Density Spent Fuel Storage Racks in Nuclear Powerplant(PWR)
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Jeon Heung-Kyun
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Abstract
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The 1st test of Boraflex coupon surveillance program was performed to confirm the soundness of Boraflex in spent fuel pit of Ulchin Powerplant unit 2. It showed that-the contraction in dimensions(length, width, and thickness) of Boraflex coupon was slightly small and the change of its weight was especiallly samll and the specific gravity was increased about 4% after radiation for about 9 months(’93.11.23∼’94.8.27). As these changes of Boraflex coupon were .within the reference values which could lead to the damage of Boraflex for-.each individual value to exceed, Boraflex in spent fuel pit could be thought to be sound. Accordingly, this could be sumarrized as follows: · The received dose of Boraflex coupon was much more small than the possible receiving dose during the life period of powerplant. · The degree of changes of Boraflex coupons may be different according to the burnup of spent fuel positioned around tree. · It has noted that the bubbles produced in spent fuel pit means that the degree of crosslinking of Boraflex is the saturation state.
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