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Further response to FOIA request for seven categories of documents re failure in electrical relays.Forwards App A documents.App A & B documents available in PDR.Search continuing for documents re Items 2,3,4 & 5 of request.

Accession Number: ML20100N222

Date Released: Saturday, November 7, 2020

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• ML20100N220 - Further response to FOIA request for seven categories of documents re failure in electrical relays.Forwards App A documents.App A & B documents available in PDR.Search continuing for documents re Items 2,3,4 & 5 of request. (3 page(s), 6/14/1984)
• ML20105C373 - Requests info on licensee response to IE Info Notice 82-13, "Failures of GE Type HFA Relays." Info should be provided by 830916. (6 page(s), 9/15/1983)
• ML20100N251 - Advises of 830913 failure of relay for recirculation pump trip on lo-lo water level.Insulation completely destroyed. Time relay removed from svc.Relay replaced w/GE recommended improved design relay. (1 page(s), 9/19/1983)
• ML20100N226 - Responds to W Laudan request for info & recommendations re considerations for review of HFA relay failure resolution. Listed considerations should be addressed by util. (2 page(s), 10/12/1983)
• ML20105C408 - Forwards Instrumentation & Control Sys Branch input to Suppl 5 of SER.Input includes one confirmatory item re instrument setpoint methodology & one open item re Agastat type relays in reactor protection sys. (7 page(s), 10/28/1983)
• ML20100N234 - Ack receipt of 830916 ltr informing NRC of operating failures of GE HFA relays & corrective actions implemented to resolve problems.Actions & commitments adequately address concerns. (1 page(s), 9/21/1983)
• ML20100N243 - Submits daily highlights.On 830906,GE,Type HFA relay on APRM channel failed in energized position.Caused by overheating resulting in varnish coating on relay coils melting & adhering to relay plunger. (1 page(s), 9/14/1983)
• ML20105C303 - Forwards request for addl info to be sent to licensee re Agastat-type relay failures.More frequent testing of relays recommended.More frequent testing may be needed to operate plant consistent w/single failure assumptions. (4 page(s), 9/29/1983)
• ML20105C300 - Summary of 830923 meeting w/util & GE re Agastat relay failures.List of participants encl. (6 page(s), 9/30/1983)
• ML20105C369 - Requests Regions I,II,IV & V followup info requested in encl Region III 830915 memo re early vintage HFA relays in operating plants (IE Info Notice 82-13) & forward findings by 830923. (2 page(s), 9/19/1983)