ML20058L553
| ML20058L553 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 11/29/1977 |
| From: | Hill W, Mayer L NORTHERN STATES POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| LER-LER-771129, NUDOCS 9105230323 | |
| Download: ML20058L553 (2) | |
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November 29, 1977
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3 ag, Mr J G Keppler, Director, Region III Office of Inspection & Enforcement
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U S Nuclear Regulatory Cotraission t,%
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Glen Ellyn, IL 60137 i>
Dear Mr Keppler:
MONTICELLO NUCLEAR GENERATING PIANT Docket No. 50-263 License No. DPR-22 i
Main Steam Line Low Pressure Switch Setpoint Drift The Licensee Event Report for this occurrence is reproduced on the back of this letter.
Enclosed are three copies.
Yours very truly, N
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-1 L 0 Mayer, PE Manager of Nuclear Support Services LOM/MHV/deh cc: Director, IE, USNRC (30)
Director, MIPC, USNRC (3)
G Charnoff MPCA Attn: J W Ferman e
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LICENSEE EVENT REPORT CONTaDt B;DCol i
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NA E LCENSE NUMBER 8 l MI NI d N l P l 1l l 0l 0l-l0 l 0 l 0l 0l 0l-l0 l0 l l3 l1 l3 l3 l3 l l0l3l vi 1 PL 7 89 14 15 25 2b 3D 31 32
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CATE00Av D00nri NUMBEA
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$7 55 59 60 61 68 69 74 7D bJ EVENT DESCR;PTION 8 Irvrrvvc nyr m StravrILL;NE TEST.' MAIN SEAM LINE LOW PRESSURE ISOLATIO 7 e9
@ lToTvpFD AT S12 PSIC: THE tem SPEC REOUIRES E011;L "ID OR GPIAER TriAN 825 PSIG WITri A J
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@ l10 PSIG ALLOKABLE DETIATION. REDUNDANT DRESSURE SKITW WAS OPERABLE.
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@9lDecrT. OYr PRrrIOUS OCCURRENE.
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SvETtu CAg!E uO ODupONENT CDupONFN' CCLE 000E COMPONENT COOE SJ+" AR MANJ' ACTW 8 VOJf0N 07 IS I Dl lc l lI IN ISl Tl R! Ul l Nl l El 0 l 7l 0l
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7 89 10 11 12 17 43 44 47 46 CAUSE DESCRIPilDN l SrTPOINT DRIFT. SWITCH WAS PFtFT. SUBSEQUENT SATISFACIORY j
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@][DURDON 11-16-77. PRESSURE SWITCH IS A HARESDALE FDDEL B2T-A12SS.
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FA04ny METHOD OF 60 ST ATkiS
% POWEA OTHEA STATES Ds0Gwipv D$00VEnv DELOA.PTON 8
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7 8 9
10 12 13 44 45 46 60 ACTwn y CONTENT MLEAIE0 DF AEL E ASE AMOUNT OF ACTwn y 8
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t00ATON OF AltEAtt I
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10 11 44 45 FERSONNE. EXPOSURES 60 NUMBEA T vpf des 0ASTON 8 1 ni ntnl LiJ l NA 1
7 89 11 12 13 PERSONNEL INJUR ES bD NUMBER DESCAPTON 810!0 lnl I n j
7 89 11 Sp 60 OFFSITE CONSEGUENCE3
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LOSS DR DAMAGE TD FACIUTY gg Tv pt ogsemp7eN
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PUBLCITY 60 81m 7 89 I
60 ADD TIONAL FACTDRS is ! NA 7 89 l
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W. Hill BD
%Dra 622-295-5152