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학술저널
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한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제50권 제5호
발행연도
2018.1
수록면
738 - 744 (7page)

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Fuel failure due to debris is a major cause of failure in pressurized water reactors. Fuel vendors havedeveloped various filtering devices to reduce debris-induced failure and have evaluated filtering performancewith their own test facilities and methods. Because of the different test facilities and methods,it is difficult to compare filtering performances objectively. This study presents an improved filtering testand an efficiency calculation method to fairly compare fuel-filtering efficiency regardless of the vendor'sfiltering features. To enhance the reliability of our evaluation, we established requirements for the testmethod and had a facility constructed according to the requirements. This article describes the debrisspecimens, the amount of debris, and the replicates for the proposed test method. A calculation methodof comprehensive debris-filtering efficiency using a weighted mean is proposed. The test method wasverified by repeated tests, and the tests were carried out using the PLUS7 and 17ACE7 test fuels tocalculate the comprehensive debris-filtering efficiencies. The evaluation results revealed that the filteringperformance of PLUS7 is better than that of 17ACE7. The proposed method can be used on any kind ofdebris-filtering devices and is appropriate for use as a standard

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