Closeout of IE Bulletin 83-08: Electrical circuit breakers with an undervoltage trip feature in use in safety-related applications other than the reactor trip system

Technical Report · Fri Apr 01 04:00:00 EST 1988

OSTI ID:5150616

Foley, W J; Dean, R S; Hennick, A

The NRC/IE issued Bulletin 83-08 December 28, 1983 because of concern about circuit breaker deficiencies reported per previous bulletins 83-01 and 83-04. The object of IEB 83-08 was to assure proper operation of circuit breakers with undervoltage trip attachments (UVTAs) in all safety-related applications other than use as reactor trip breakers (RTBs). The bulletin was issued for action to all licensees and holders of construction permits of power reactors. Evaluation of utility responses and NRC/Region inspection reports shows that the bulletin can be closed out per specific criteria for 123 (99/percent/) of the 124 facilities to which it was issued. A follow-up item is proposed for use by the NRC to assure completion of required actions at the remaining facility. Circuit breakers with UVTAs were used in safety-related applications other than the reactor trip system in six (6) facilities. Malfunctions of the UVTAs were reported only for the facility for which followup is proposed.

• Research Organization: Parameter, Inc., Elm Grove, WI (USA)
• OSTI ID: 5150616
• Report Number(s): NUREG/CR-4665; ON: TI88009207
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220400 -- Nuclear Reactor Technology-- Control Systems
220900* -- Nuclear Reactor Technology-- Reactor Safety
42 ENGINEERING
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
CIRCUIT BREAKERS
DESIGN
ELECTRICAL EQUIPMENT
ENGINEERED SAFETY SYSTEMS
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
REACTOR PROTECTION SYSTEMS
THERMAL POWER PLANTS