• 제목/요약/키워드: NSSS

검색결과 83건 처리시간 0.028초

The Performance Evaluation of NSSS Control Systems for UCN 4

  • Sohn, Suk-Whun;Song, In-Ho;Sohn, Jong-Joo;Park, Jong-Ho;Seo, Jong-Tae
    • Nuclear Engineering and Technology
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    • 제33권3호
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    • pp.339-348
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    • 2001

  • NSSS Control Systems automatically mitigate transient conditions and leads to a stable plant condition without operator actions when a transient occurs during normal power operation. In this paper, the function and performance of NSSS control systems were examined and evaluated by comparing the predicted results with the measured data for the selected events. Loss of a Main Feedwater Pump and Load Rejection to House Load Operation events were selected for the evaluation among the transient tests peformed during the Power Ascension Test (PAT) of UCN unit 4. The overall schematic control actions of NSSS control systems can be evaluated easily through the observation of these two typical events. The selected events were analyzed by the KISPAC computer code[l] which had been used in developing the control logic and determining the control setpoints during the plant design. Additionally, the performance of FWCS during low power operation was evaluated. The result of evaluation showed that the NSSS control systems were designed properly and the performance of the NSSS control systems was excellent and also the computer code had a good prediction capability.

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울진 3호기 잠복방출시험을 이용한 몰비 조절방안 (Molar Ratio Control Scheme Based on Hideout Return Test for Ulchin Nuclear Power Plant Unit 3)

  • Kim, Y. H.;Y. N. Suh;Lee, S. S.;Kim, E. K.;Y. J. Pi
    • 한국에너지공학회:학술대회논문집
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    • 한국에너지공학회 1999년도 추계 학술발표회 논문집
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    • pp.125-130
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    • 1999

  • Corrosion of steam generator tubes is the major issue affecting selection of secondary water chemistry parameters. The objective of secondary side water chemistry control is to minimize corrosion damage and to thereby maximize the reliability and economic performance of the secondary system. To achieve this objective, the water chemistry has to be compatible with all parts of the system including steam generators.(Omitted)

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