05000000/LER-1977-012, :on 770620,during Investigation of Cycle 5 Max Critical Power Ratio Limits,Ge Found That Pump Trip Delay Time Assumed in Original Cycle 5 Transient Analysis Not Appropriate.Amend Request Will Be Submitted
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@ LDURING AN INVESTIGATION OF CYCLE 5 FCPR LIMITS GLNE 89 l
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@l IOR *DE 'IKO PUMP TRIP FOLIBilNG A 7URBINE TRIP. TIE ORIG HC B 1 ASSlBED A 0.1 SECOND DELAY TOR PlNP ELELTRIC 00 B9$l ON EVALl!ATION OF STAR 1UP TEST DATA, A DEIAV 0F 2.0 SECONPS IS APPR 80 U9 I
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l LOSS Ort OAMAGE TO FACILHY ivn Discnir ton 8312020179 700426 UD [2]
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M I N N E A PO Ll e, M I N N E S OT A 58401 June 27, 1977 Mr J G Keppler, Director, Region III Office of Inspection 6 Enforcement U S Nuclear Regulatory Cornission 799 RooseveIt Road Glen Ellyn, IL 60137
Dear Mr Keppler:
MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 i:%.! '.t-MCPR Non-Conservatism l
The Licensee Event Report for this occurrence is reproduced on the back of this letter.
Enclosed are three copies.
Yours very truly,
'Tnkt)at/b L 0 Mayer, PE Manager of Nuclear Support Services LOM/MHV/deh cc:
Director, MIPC (3)
G Charnof f MPCA Attn:
J W Fe man M