ML18219C143

Supplement to LER 1974-009Y-00, Abnormal Occurrence During Performance of Protection System Time Response Testing, the Reactor Trip Breakers Were Closed

ML18219C143
Person / Time
Site:	Cook
Issue date:	12/30/1974
From:	Jurgensen R Indiana Michigan Power Co, (Formerly Indiana & Michigan Power Co)
To:	James Keppler US Atomic Energy Commission (AEC)
References
LER 1974-009Y-00
Download: ML18219C143 (7)

Text

I e AEC DIST'TIG" FOR PART 50 DQCI'ET ME AXIAL (TEi'PORARY FORi'il)CONTROL NO: FILE: 210 F RO;l Indiana It: Michigan Power Bridgman, Mich.49106 R.W.Jur enson oDATE OF DOC DATE REC'D 12-0-4 TV,'X RPT OTHER TO: Mr.J.G.Keppler ORIG 1 signed CC OTHER SENT AEC PDR SENT LOCAL PDR CLASS UNCLA XX PROPIixIFO INPUT NO CYS REC'D 1 DOC,iET NO: 50-315 DESCRIPTION:

Ltr furnishing suppl to A'bnorma Occurrence AO-50-315/74-09 involving the brea'being closed w1.thout having intermediate range channels in service on 12-18-74....

ENCLOSURES:

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=-<<I'P I INDIANA D NIIDNIIDAN PDINER DDNIPANYi DONALD C COOK NUCLEAR PLANT>ig g P.O.Box 458, Bridgman, Michigan 49106-'+ill)December 30,-1974 5o-3)5 U.S.Atomic Energy Commission Directorate of Regulatory Operations Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Attention:

Mr.J.G.Keppler;Regional Director Gentlemen:

The following is a supplement to Abnormal Occurrence Number AO-050-315/74-09v Prior to commencing the Rod Drop Time Preoperational Test on December 18, 1974, the Intermediate Range Nuclear Instrumentation was placed in service as required by Technical Specifications Table 3.3-1 Number 5.AA review of previous testing which involved closing reactor trip breakers showed that on December 9, 1974, during Protection System Time Response Testing, the breakers were closed without having Intermediate Range Channels in service.CORRECTIVE ACTIONS TAKEN (1)The Intermediate Range Channels were placed in service on 2345 December 18, 1974.(2)It was determined that the health and safety of the public was not jeopardized since the CRDM Motor Generators were not energized while the Reactor Trip Breakers were closed, thus movement of the Control Rods was impossible.

CORRECTIVE STEPS TAKEN TO AVOID RE-OCCURRENCE (1)A change to Surveillance Test Procedure THP 4030 STP.100 was issued which requires Intermediate RangeeChannels to be in operation prior to commencing this test.JAM 2l975 0~~K l U.S.Ato Energy Commission December 30, 1974 Page 2 DATE FULL COMPLIANCE WILL BE ACHIEVED (1)Full compliance has now been achieved (effective 12-18-74).

Respectfully, baf cc: J.E.Dol an R.S.Hunter R.M.Kopper G.E.LeMasters G.E.Lien PNSRC R.J.Vollen BPI K.R.-Baker, Resident Inspector.W.Jurg en Plant Man ger LlCENSEE EVENT REPORT I XII six 7 89 CONTROL OLOCK: 1 (P SE PRINT ALL REQUIRED INFORMlLTION) l R=3O-7g LCENSE EVENT TYPE TYPE LICENSEE NAME LICENSE NUMBER 30 31 32 25 26 14 15 yogCg OO-OoOOO-oo A i i i i~pi REPORT.REPORT[OD1]t'ONT

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