Comprehensive aging assessment of circuit breakers and relays

Technical Report · Sun Mar 01 04:00:00 EST 1992

OSTI ID:5780810

Gleason, J F ^[1]

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1. Wyle Labs., Huntsville, AL (United States)

As part of the NRC Nuclear Plant Aging Research (NPAR) Program a comprehensive aging assessment was made of relays and circuit breakers. Relays and circuit breakers are important nuclear power plant equipment which are susceptible to degradation with time. This is a Phase II NPAR report which follows the NPAR strategy. Tests on naturally aged and degraded relays and circuit breakers were performed, in-situ measurements made and current, and improved methods for inspection, surveillance and monitoring (ISM) evaluated. Significant results described in this report were the identification of inspection, surveillance and monitoring methods which provide a higher level of assurance that aging will be detected and mitigated. The potential exists that implementation of the improved methods in nuclear plants would minimize and impact of aging and result in more cost effective maintenance on relays and circuit breakers.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Wyle Labs., Huntsville, AL (United States)
• Sponsoring Organization: NRC; Nuclear Regulatory Commission, Washington, DC (United States)
• OSTI ID: 5780810
• Report Number(s): NUREG/CR-5762; WYLE--60101; ON: TI92010326
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
220900 -- Nuclear Reactor Technology-- Reactor Safety
AGING
CIRCUIT BREAKERS
ELECTRICAL EQUIPMENT
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
INSPECTION
MAINTENANCE
MONITORING
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
REACTOR SAFETY
RELAYS
SAFETY
SURVEILLANCE
THERMAL POWER PLANTS