Workshop on gate valve pressure locking and thermal binding

Technical Report · Sat Jul 01 04:00:00 EDT 1995

DOI:https://doi.org/10.2172/95199· OSTI ID:95199

Brown, E J

The purpose of the Workshop on Gate Valve Pressure Locking and Thermal Binding was to discuss pressure locking and thermal binding issues that could lead to inoperable gate valves in both boiling water and pressurized water reactors. The goal was to foster exchange of information to develop the technical bases to understand the phenomena, identify the components that are susceptible, discuss actual events, discuss the safety significance, and illustrate known corrective actions that can prevent or limit the occurrence of pressure locking or thermal binding. The presentations were structured to cover U.S. Nuclear Regulatory Commission staff evaluation of operating experience and planned regulatory activity; industry discussions of specific events, including foreign experience, and efforts to determine causes and alleviate the affects; and valve vendor experience and recommended corrective action. The discussions indicated that identifying valves susceptible to pressure locking and thermal binding was a complex process involving knowledge of components, systems, and plant operations. The corrective action options are varied and straightforward.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Reactor Regulation
• Sponsoring Organization: Nuclear Regulatory Commission, Washington, DC (United States)
• OSTI ID: 95199
• Report Number(s): NUREG/CP--0146; CONF-9402154--; ON: TI95016110
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
BWR TYPE REACTORS
DIAGRAMS
EXPERIMENTAL DATA
FAILURES
PRESSURE GRADIENTS
PWR TYPE REACTORS
TEMPERATURE GRADIENTS
TESTING
VALVES