ML20085E549

LER ER-76-012:on 760430,equipment Review Revealed Valves CV-2113 & CV-2115 Possibly Did Not Meet Original Design Specs Re Allowable Stresses at Valve body-to-bonnet Flange. Caused by Use of Different Calculations

ML20085E549
Person / Time
Site:	Palisades
Issue date:	05/14/1976
From:	Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20085E546	List: ML20085E543 ML20085E549 ML20085E556
References
LER-ER-76-012, LER-ER-76-12, NUDOCS 8308150205
Download: ML20085E549 (2)

Text

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UCENSEE EVENT REPORT ~ -

CONTROL 8 LOCK:l l l l l l l (ptgASE PRMIT ALL RESUNIED INFOAMATION) 1 8 LCENSE NUM8ER TYPE

• TYPE O l Il Ml Pl A l L l 1l l ol0 l-l ol ol0 l o l o l-l ol0 l l h l 1 l 1l 1l 1l lol1l 7 89 14 in 25 28 30 31 32 E source coCKET NUMOER EVENT DATE REPO,37 QATE O cowr l l 1 trJ LL_] lo I S I 01-l ol 2l5 i s l I olu 13 l0171 si lo i s 111 ulr ls I 7 8 57 58 59 80 81 88 89 74 75 80 EVENT OESCRIlmON D6 l During a review of equi; ment associated with long-term cooling qualification, we l 7 89 80 Q l have determined that two valves (CV-2113 and CV-2115 associated with charging l 7 89 80 UE l system) may not meet code require =ents (original design steeifications) as they l 7 89 80 UE l relate to allevable stresses at the valve body to bonnet flange. (ER-76-12) l 7 8 80

@9 7 89 l

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Y:EE $o*E CoMooNENT CoOE E O VOLATION E I als I ls_]

7 89 10 11 Iv I A l LI VI El X I 12 17

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43 l1 l2 lo l 8l [NJ 44 47 48 CAUSE DESCRIPTION gg l When these valves were de' signed, standard methods of calculating these. stresses did l 7 89 80 HE I not exist. Calculations using current 1*r accetted methods show the stresses to l

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( ' @8 9l be below yield but above code allevable. The valve is a 2" globe, air overated, l

'sE s power oTe status "osCNEN ceCovERY oEscapTON i

7 8 (AJ 9

loIoI ol I 10 NA l [C_) l NA l l 12 13 44 45 48 80

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RiLND C RE["ESE AMOUNT CF ACTNTY LOCATON CF RELEASE E L:J lzJ l NA l l NA l 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCAPTCN h 3 I of o I ol11 Lz_]

7 89 12 I

13 NA l b 80 PERSONNEL INJUAIES NUM8ER CESCRIPTON i4 l 0101 ol I NA l l 7 89 11 12 80 t

l PROBABLE CONSEQUENCES  !

3G l None, valve stresses are conservatively calculated to be belov vield. l  !

7 89 80 [

LOSS OR CAMAGE TO FACruTY TYPE DESCAPTCN p 8 LzJ 7 89 l

10 nA l 80 PUBUCITY hl 7 89 NA l 80 ADDITIONAL FACTORS

] l (Cause Description Contd) 'A351 CF8M SS, 1500 lb class. Valve bonnet replacement l 7 89 80 Q l vill resolve problem and vill be completed during or before next refueling outage l (summer of 1977). 8308150205 760525 * '

PDR ADOCK 05000255 S

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Mr James G. Keppler 5' D' Office of Inspection Enforcement ,-,

Region III

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US Nuclear ReFJLlStory Cc::::21ssion 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR l PALISADE PLANT, ER-76-12 CHARGING SYSTEM VALVES 1

Attached is a reportable occurrence which relates to the Palisades Plant.

( This occurrence has been classified as a prcmpt reportable occurrence. It should be further noted that the event date (April 30,1976) is the date when it was determined that this occurrence was reportable.

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'l , - ~w ,l, ,a David A. Bixel Assistant Nuclear Licensing Administrator GUM SENT REGION .

l MAY I. ' . '

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