Nuclear plant-aging research on reactor protection systems

Technical Report · Fri Jan 01 00:00:00 EST 1988

DOI:https://doi.org/10.2172/5122402· OSTI ID:5122402

Meyer, L C

This report presents the rsults of a review of the Reactor Trip System (RTS) and the Engineered Safety Feature Actuating System (ESFAS) operating experiences reported in Licensee Event Reports (LER)s, the Nuclear Power Experience data base, Nuclear Plant Reliability Data System, and plant maintenance records. Our purpose is to evaluate the potential significance of aging, including cycling, trips, and testing as contributors to degradation of the RTS and ESFAS. Tables are presented that show the percentage of events for RTS and ESFAS classified by cause, components, and subcomponents for each of the Nuclear Steam Supply System vendors. A representative Babcock and Wilcox plant was selected for detailed study. The US Nuclear Regulatory Commission's Nuclear Plant Aging Research guidelines were followed in performing the detailed study that identified materials susceptible to aging, stressors, environmental factors, and failure modes for the RTS and ESFAS as generic instrumentation and control systems. Functional indicators of degradation are listed, testing requirements evaluated, and regulatory issues discussed.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States)
• Sponsoring Organization: Nuclear Regulatory Commission, Washington, DC (United States)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5122402
• Report Number(s): NUREG/CR-4740; EGG-2467; ON: TI88007920
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BWR TYPE REACTORS
ENGINEERED SAFETY SYSTEMS
REACTOR PROTECTION SYSTEMS
PWR TYPE REACTORS
AGING
DATA BASE MANAGEMENT
FAILURES
MAINTENANCE
NUCLEAR POWER PLANTS
REACTOR OPERATION
REACTOR SAFETY
REGULATIONS
RELIABILITY
REPORTING REQUIREMENTS
SERVICE LIFE
MANAGEMENT
NUCLEAR FACILITIES
OPERATION
POWER PLANTS
REACTORS
SAFETY
THERMAL POWER PLANTS
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled