05000255/LER-1979-033-03, /03L-0 on 790730:I-beam to Which Snubber Is Anchored Was Twisted Approx 20 Degrees at Spot Where Snubber Bracket Connected.Cause Undetermined.Defective I-beam Segment Replaced & Snubber Fully Compressed

/03L-0 on 790730:I-beam to Which Snubber Is Anchored Was Twisted Approx 20 Degrees at Spot Where Snubber Bracket Connected.Cause Undetermined.Defective I-beam Segment Replaced & Snubber Fully Compressed

ML18043A966
Person / Time
Site:	Palisades
Issue date:	08/16/1979
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18043A965	List: 05000255/LER-1979-033-03, /03L-0 on 790730:I-beam to Which Snubber Is Anchored Was Twisted Approx 20 Degrees at Spot Where Snubber Bracket Connected.Cause Undetermined.Defective I-beam Segment Replaced & Snubber Fully Compressed
References
LER-79-033-03L, LER-79-33-3L, NUDOCS 7908230410
Download: ML18043A966 (2)

LER-1979-033, /03L-0 on 790730:I-beam to Which Snubber Is Anchored Was Twisted Approx 20 Degrees at Spot Where Snubber Bracket Connected.Cause Undetermined.Defective I-beam Segment Replaced & Snubber Fully Compressed

Event date:
Report date:
2551979033R03 - NRC Website

text

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PALISADES NRC FORM 306 (7-77)

U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: '~-'--.1.....--'--"'---'---- CD 1

6 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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7 8 IM I T IP I A I L l 1 10! o I ol - Io Io I o l 01 o I-Io I 9

LICENSEE CO::>E 14

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~5 26 LICENSE TYPE 30 57 CAT SB CON'T [ITIJ 7

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~~~ W©IO I 510 I b I 01 21515 101 o I 71 3 I 011l9l@L.§18 11 16 17 19 10 60 61 DOCKET NUMBER 6S 69 EVENT DATE i4 75 REPORT DATE SO EVENT DESCRiPTION AND PROBABLE CONSEQUENCES@

I Dnri n:: id pin a: walkdow--ns nerformed for IE Bulletin 79-02, a deficiency with

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1snubber No. 33 was found.

The I-beam to which the snubber is anchored was

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I hr; stori app-rox 20 degrees at the spot where the snubber bracket was connec-1

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f ted, resulting in the snubber being misaligned from the pipe center-line.

[QJ]J 1In addition, the snubber was* mounted such that *it would behave as a rigid ITJI] I sunnort when compressed.

This condition represented a degraded mode permi tr [IT[] I ted by TS 3. 20.

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9

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SYSTEM CODE ls !FJ@

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(."::;\\

LER/RO CVENT YEAR

\\.!.:,/ REPORT I 7 I 9J NUMBER 21 22.

Operability was restored in the required time.

CAUSE

CAUSE COMP.

VALVE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE IE I@ L!J@ 1s 1u1 Pl 01R1 TJ@ I x1@. I z1@

11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REPORT NO.

CODE TYPE I 01 3 I ;?_!

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~ l=J 24 26 27 28 29 30 31 REVISION NO.

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32 80 ACTION FUTURE TAKEN ACTION EFFECT ON PLANT SHUTDOWN r::;::;..

ATTACHMENT NPRD-<1 METHOD HOURS ~ SUBMITTED FOAM SUB.

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CAUSE DESCRIPTION AND CORREC"flVE ACTIONS @

43 44 47 I Following replacement of the defective segment of the I-beam, it was [J]J] I found that the snubber nad to be fullY compressed in order to fit between_J

!:III] the pipe a...~d the I-beam.

Adjustments to a turnbuckle between the snubber _J ITm I and. the I-beam corrected this.

Examinations of other snubbers are being [J]3J I nerformed as part of the action required by IE Bulletin 79-02.

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g FACILITY

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• STATUS

% POWER OTHER STATUS '29.i ITTIJ~@IOl918J@IN/A J

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9 10 12 13 44 ACTIVITY CONTENT r:;;;-..

c~:I~f rzY@F jEzE1§ I NI AMOUNT OF ACTIVITY 7

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10 11 PERSONNEL EXPOSURES

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NUMBER

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DESCRIPTION

80 METHOD OF r:;:;-.

DISCOVERY

_J)l6COVERY D.ESCRIPTION '23'

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A a 9 11

~12-;--"-'--"-~~~~~-~~~~--~--~~--~-~~~-~-~---~--~-.lso LOSS OF OR DAMAGE TO FACILITY Q TYPE

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80 NRC USE ONLY 1111111111111 68 69 so

consumers Power company General Offices: 212 West Michigan Avenue,.Jackson, Michigan 49201

• Area Code 517 788-0550 August 16, 1979 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory-Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKl.""T 50-255 - LICENSE DPR PALISADES PLANT - LER 79-033

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\\!;. J 1~J~\\b u On the reverse side is Licensee Event Report 79-033 which is reportable under Technical Specification 6.9.2.b(2).

David P Hoffman (Signed)

David P Hoffman Assistant Nuclear Licensing Administrator CC:

Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement

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