ML20058K954
| ML20058K954 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 12/31/1975 |
| From: | Day B, Mayer L NORTHERN STATES POWER CO. |
| To: | Stello V NRC |
| References | |
| LER-LER-751231, NUDOCS 9105060233 | |
| Download: ML20058K954 (2) | |
Text
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3 LICENSEE EVENT REPORT CCNTPCL SLCCK l l
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(PLEASE PRINT mLL REQUIRED INFORMAT!ON) 1 6
Adf LCEN36 Navets TYp Q lM l N lMlN lP l1l l 0l 0l-l 0 l 0l0 l 0 l 0 l--l 0l0 l l4l1l1ljl1l l0l1l 7 89 14 15 25 26 JJ 31 J2 C ATE ODAV
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$9 60 81 68 69 74 75 60 EVENT DESCAIPTION
@l During normal operation, hydraulic snubber located outside drwell on isolable l
7 89 SE l secticn of core sprav discharge line discovered inocerabic due to looseness and l
e0 7 89 Ql improper orientation of the pipe clamp. No previous similar occurrences.
Pipe l
80 7 89 39 l clamp adjusted and tightened.
(A0 263/75-27) 53 0 7 89 l
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lH l A l Nl GlE l R l l Al l3l2l1l0l lNl ecwcN 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION l The pine clamp for a Bergen-Patterson.Model HSSA-10 hydraulic snubber was loose andl O8 7 89 BE I improperly oriented due to personnel error during plant 80 construction.
Inspection l Y
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@ l of accessible, safety-related snubbers revealed all pipe clamps tight 80 l
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l Non Routine Area inspection l
7 8 10 12 13 44 45 48 60 ACT!vtT V CONT [NY DELE ASED 08 AEiEASE AVOUNT OF ACTMTV IE (2.J LzJ l
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LOCATCN CF PEdast l
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10 11 44 45 PEASONNEL EXPCSUAES 80 NUMBER itpE OESCA#?CN
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7 89 11 12 13 PERSONNEL INJUA:ES e0
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7 89 1? 12 80 CFFS:TE CONSEQUENCES
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LCSS CA DAMAGE TO FAC;UTV 80 Tvet etsCacTON
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PUBUCITY u0 1
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60 ADDITICNAL FACTORS bl 7 89 l
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@ l Cause Pescription (contd.) and properly oriented.
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7 89 80
,i NAME. Byron D Day 612/295-5151 PHONE 9105060233 751231
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NORTHERN STATES POWER COMPANY MIN N E A POLI S. MIN N E S OTA B5401
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Decetabe r 31, 1975 197Y afdlou q\\-
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Mr Victor Stello, Director y,5#
Division of Operating Reactors ro D S Nuclear Reg,ulstory Co::r.ission Washington, DC 20555 el4 Dent Mr Ste)Ic.
FONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Inoperable Hydraulic Snubber The Licc1see Event Report for this occurrence is reproduced on the back of this ietter.
Yourt, very truly,
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L 0 Mayer, PE Manager of Nuclear Support Services
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