Closeout of IE Bulletin 80-20: failures of Westinghouse Type W-2 spring return to neutral control switches

Technical Report · Sun Jun 01 04:00:00 EDT 1986

OSTI ID:5638549

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

On June 18, 1980, Commonwealth Edison Company submitted Licensee Event Report (LER) 50-295/80-24 to the NRC, describing a malfunction of a Westinghouse Type W-2 control switch important to safety at Zion Unit 1. On the same date, Westinghouse submitted a preliminary issue of Technical Bulletin NSD-TB-80-9 to the NRC on the subject switches. On July 31, 1980, IE Bulletin 80-20 was issued to all power plant licensees and permit holders, requiring them to take specific actions and report results. Evaluation of utility responses and NRC/IE inspection reports shows that the bulletin can be closed out per specific criteria for 122 (98%) of the 124 current facilities to which it was issued. A followup item for the remaining two facilities is proposed for use by NRC/IE, to ensure satisfactory completion of corrective action.

• Research Organization: Parameter, Inc., Elm Grove, WI (USA)
• OSTI ID: 5638549
• Report Number(s): NUREG/CR-3962; ON: TI86901488
• Country of Publication: United States
• Language: English

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