Thermal stratification of surge line in PWR nuclear power plant

Book · Wed Nov 01 04:00:00 EST 1995

OSTI ID:122596

Yu, Y J; Lee, T H; Sohn, Y S; Park, S H ^[1]; Bak, W J ^[2]

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1. Korea Atomic Energy Research Institute, Daejon (Korea, Republic of)
2. ABB-Combustion Engineering Co., Windsor, CT (United States)

Recent observations at operating plants and subsequent US NRC requirements have identified flow stratification in surge lines as a phenomenon that must be considered in the design basis of surge lines. During YGN (Younggwang Nuclear) Unit 3 pre-core hot functional testing, surge line pipe wall temperatures and pipe displacements were measured to determine the degree of surge line flow stratification. Test data from YGN Unit 3 indicate that stratified flow exists in the surge during heatup and cooldown. This paper presents the circumferential and axial temperature distributions and the pipe movements measured from surge line stratification testing performed during the YGN Unit 3 pre-core hot functional test.

• OSTI ID: 122596
• Report Number(s): CONF-950740--; ISBN 0-7918-1335-5
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
DESIGN
EXPERIMENTAL DATA
FLUID FLOW
PERFORMANCE TESTING
PIPES
PRESSURIZERS
PRIMARY COOLANT CIRCUITS
PWR TYPE REACTORS
STRATIFICATION
TEMPERATURE GRADIENTS