(An) investigation for design and operational procedures to avoid waterhammer in NPP piping systems = 원자력발전소 배관 계통의 수격작용 방지를 위한 설계 및 운전 절차에 관한 연구

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To predict waterhammer initiation due to water slug formation in the horizontal section of piping system and to calculate its impact pressure by using the results of waterhammer initiation model, waterhammer initiation model and impact pressure calculation model have been developed. In the impact pressure calculation model, the effects of water layer depth at which water slug formation and water temperature variation with time and space have been included to calculate a more realistic impact pressure. Prediction of waterhammer initiation is compared with experimental data for the various ``L`` shaped pipes. The results show that the present waterhammer initiation model well predicts the waterhammer initiation boundary for inverted vertical ``L`` shaped pipe filled through the horizontal pipe. Impact pressure calculated by present model also gives good agreement with the range of impact pressure of steam bubble collapse experiment. Impact pressure is calculated at the waterhammer initiation boundary by using the conditions obtained from waterhammer initiation model. From this result, it is seen that low inlet subcooling results in not only low frequency of waterhammer but also minor impact pressure if it does occur.
Advisors
Chun, Moon-Hyun전문헌
Description
한국과학기술원 : 원자력공학과,
Publisher
한국과학기술원
Issue Date
1993
Identifier
68446/325007 / 000911156
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력공학과, 1993.2, [ xi, 63 p. ]

URI
http://hdl.handle.net/10203/49278
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=68446&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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