ML20066A051

Forwards LERs 82-010/01T-0,82-011/01T-0,82-012/01T-0 & 82-014/01T-0

ML20066A051
Person / Time
Site:	Monticello
Issue date:	10/29/1982
From:	Musolf D NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20066A054	List: 05000263/LER-1982-010-01, /01T-0:on 820902,8-inch,150-lb RCIC Turbine Exhaust Check Valve 9 Found Leaking in Excess of Tech Specs. Caused by Leaking Valve Seat Due to Poor Svc Conditions. Disk & Seat Ring Replaced 05000263/LER-1982-011-01, /01T-0:on 820903,3-inch Outboard Main Steam Drain Isolation Valve MO-2374 Found Leaking in Excess of Tech Specs.Caused by Steam Eroding Valve Disc Due to Misalignment of Disc to Seat Ring.Seats Ground 05000263/LER-1982-012-01, /01T-0:on 820909,18 & 20-inch,150-lb T-seated Primary Containment Purge & Vent Valves Found Leaking in Excess of Tech Specs.Caused by Valves Improperly Closing & Seating Probably Due to T-ring Interference 05000263/LER-1982-014-01, /01T-0:on 821012,drywell Atmospheric Control Sys 2-inch,600-lb Inboard Isolation Bypass Valve CV-2385 Found Leaking in Excess of Tech Specs.Caused by Worn Groove in Disk Face.Disk Machined,Lapped & Reinstalled ML20066A051
References
NUDOCS 8211050009
Download: ML20066A051 (1)

Text

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Northern States Power Company 414 Nicollet Mall Minneapoks. Minnesota 55401 Telephone (612) 330 5500 October 29, 1982 Regional Administrator Region III U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 Licease No. DPR-22 Type B Containment Leakage Test Failures RO-82-10, 11, 12, and 14 The License Event Reports for these occurrences are attached.

These events are reported in compliance with Technical Specification 6.7.B.l.c since they represent degradation of containment isolation valves.

5,! p'

- #5 David Musolf Manager - Nuclear Support Services DMM/SAF/bd cc: NRC Document Control Desk (1)

NRC Resident Inspector MPCA Attn: J W Ferman 8211050009 821029 NOV 11g y g,,g A

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