ML20086D760

Forwards LER Re Torus Water Vol Below Limit.W/O Encl

ML20086D760
Person / Time
Site:	Monticello, 05000000
Issue date:	09/22/1976
From:	Mayer L NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19289B550	List: 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 05000000/LER-1977-020-03, /03L:on 770404,RCS Leakage Determined to Be Greater than 10 Gpm.Caused by Packing Leakage Past Stems on RTD Bypass Throttle Valves 13RC20 & 14RC20.Valves Placed on Backseat & Stem Leakage Decreased 05000000/LER-1977-038-03, /03L:on 770519,RCS Leakage Determined to Be Greater than 10 Gpm from Stem Leakoff on Manual Isolation Valves 1PS24 & 1PS28 for Pressurizer Spray Valves.Caused by Packing Leakage.Valves Will Be Repacked at Next Outage ML20086D481 ML20086D514 ML20086D520 ML20086D537 ML20086D550 ML20086D554 ML20086D557 ML20086D561 ML20086D567 ML20086D606 ML20086D642 ML20086D691 ML20086D703 ML20086D760 ML20086D788 ML20086D818 ML20086D823
References
NUDOCS 8312050091
Download: ML20086D760 (1)

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l MIN N E APOLI S. MI N N E SOTA 55401

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September 22, 1976 j

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Mr J G Keppler, Director, Region III S

Office of Inspection & Enforcement U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Torus Water Volume Below Limit The Licensee Event Report for this occurrence is reproduced on the back of this letter.

Enclosed are 3 copies, Yours very truly, g o.

t L 0 Mayer, PE Manager, Nuclear Support Services LOM MHV/ deb cc: Director,. IE, USNRC (40)

Director, MIPC, USNRC (3)

G Charnoff l.'.

MPCA-7.

Attn:- J W Ferman.

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8312050091 80426

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PDR ADOCK 05000263 S

PDR COPY SENT REGIO,

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