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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.3
- 수록면
- 781 - 789 (9page)
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초록· 키워드
오류제보하기
KHNP had licensed Dynamic Control rod Reactivity Measurement (DCRM) method using detector currentsignals of PWRs in 2006. The method has been applied to all PWRs in Korea for about 15 years successfully.
However, the original method was inapplicable to PWRs using low-sensitivity integral fissionchamber as ex-core detectors because of their pulse pile-up and the nonlinearity of the mean-squarevoltage at low power region. Therefore, to overcome this disadvantage, a modified method, DCRM-EK,was developed using kinetics behavior after equilibrium condition where the pulse counts maintainthe maximum value before pulse pile-up. Overall measurement, analysis procedure, and related computercodes were changed slightly to reflect the site test condition. The new method was applied to atotal of 15 control rods of 1000 MWe and 1400 MWe PWRs in Korea with worths in the range of 200 pcme1200 pcm. The results show the average difference of -0.4% and the maximum difference of 7.1%compared to the design values. Therefore, the new DCRM-EK will be applied to PWRs using low sensitivityintegral fission chambers, and also can replace the original DCRM when the evaluation fails by bignoises present in current or voltage signals of uncompensated/compensated ion chambers.
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