Dynamic model of YGN 3&4 steam generators for natural circulation mode = 영광 3,4호기 증기발생기의 자연순환 해석을 위한 동적 모델

A dynamic model for the secondary side of Yonggwang nuclear power plant units 3 and 4 (YGN 3&4) steam generator model is developed to improve the accuracy of the present performance analysis code. The new model is based on the one-dimensional three region model to predict the local quality and void fraction distribution along the U-tube length. The local quality concept is used instead of the Wilson bubble rise correlation to simulate the steam generators in the natural circulation mode. The new model can be applicable to the plants in the power operation modes such as load maneuvering transients in which the steam generator internal flow is maintained in the natural circulation mode. To validate the new model, the code predictions are compared with the actual plant data measured for the selected load maneuvering tests performed during the YGN units 3 power ascension test period. The results from the improved model show better agreement with the plant data than those from the present code. Especially, the new model``s capability of accurately simulating the steam generator water level behavior during the fast transients such as a large load rejection event is demonstrated.
Advisors
No, Hee-Cheonresearcher노희천researcher
Publisher
한국과학기술원
Issue Date
1995
Identifier
101814/325007 / 000923242
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력공학과, 1995.8, [ x, 67 p. ]

Keywords

Quality; Natural Circulation; Steam Generator; YGN 3&4; Void Fraction; 기공률; 습분률; 자연순환현상; 증기발생기; 영광 3,4호기

URI
http://hdl.handle.net/10203/49337
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=101814&flag=t
Appears in Collection
NE-Theses_Master(석사논문)
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