ML19338E069

LER 80-066/01T-0:on 800912,determined That a Steam Generator Steam Outlet Pipe Hangers Will Be Subj to Overstress During Seismic Event.Caused by Dead Weight & DBE Loading Factors.Hanger Mods Completed

ML19338E069
Person / Time
Site:	Beaver Valley
Issue date:	09/17/1980
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19338E067	List: ML19338E066 ML19338E068 ML19338E069 ML19338E070
References
LER-80-066-01T, LER-80-66-1T, NUDOCS 8009240458
Download: ML19338E069 (2)

Text

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f %.NRC FORM 384 U. S. NUCLEAR RECULATCRY COMMtSSION

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D ' LICENSEE EVENT REPORT CONTROL BLOCet: l i

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lh (PLEASE PRINT OR TYPE alt. REQUtHED INFORMATION1-i o

d 9 l P'l A l 3 l V i S l 1 J@l 0 l 0 l- l uCENstNLMuEM LICENSEE CCOE 'd 15 0 l0 l 0 l 0 l 0 l- l0 'l450 l@l4 26 l1 l1 l1 l1 l@l57 garl bdl@

uCENSE TYPE JG CcN'T loIil '"[,,,$

3 l L @l 0 l 5 l 0 l 0 l 0 t 3 l 3 l 4 @l 0l 9[ 1l 2l 81 0@[0 l 9 l 117 l 8 l 080l@ ;b i 4 . tso 63 OOCK ET NU?AU ER +2d 69 6 VENT CATE 24 HEPORT Q ATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h FJTTl i It has been determined that an overstress condition exists on the "A" Steam- l l o ,3 l l Generator steam outlet pipin;: hangers. During a b.ainn basis earthquake coincident l

[o la l Iwith a turbine trip, failure of these hanners would lead to a steam line rupture and I

. e t o ! s t l loss of (one) heat sink. I lo is 1 l 1 lo !7I l I lois ! I I 7 as 80 E CDE SUSC E COMPCNENT CCOE SUSC C'E SU E 10691 8

I cl cl@ l nl@ l A lh l S I U l P I O l R l Tlh I A lh [Z_j h 9 10 7 11 12 13 18 la 20 SEQUENTIAL CCCURRENCE REPORT REVISICN gg pf go EVENT vE AR R EPCR T NO. CCCE TYPE NO.

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4J 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h tijollThe cc:nbined cause for this condition is due to dead-weight plus a desien basis i l' LL! I earthquake and a turbine trip. Modification of the hangers to alleviate this i (1 T 1 l condition has been completed. l li i11 l l It tali l a 9 so STA NPCWER CTHER STAT 1JS is Y 08SCOVERY CESCRIPTION I1 i5 ilHlh l0l0l0l@l DesiCn l l C l@l Special inspection l~

ACT1vtiv CO TENT u attEast AucuNT or Activity (h) LcCATION OF RELEME @

li 91 l : I @a :r aELEAsEL;j@l N/A I I N/A I i d 3- la tv 44 46 80 PERSCN%EL f uPCSLRES NuveER Tv s O E SCRIPTION 4

.iti: l 0lOl0l@l'.l@l . N/A l PERSCNNEL NJL ES NuvsER cES: RifficNh li l -I5 .) Ol0lOl@l 7 tt 12 N/A I 80 LCSS C8 CR cav4CE TO FactLify TYPE DEStasatioN I $ 1 + 1 (,,1]@l N/A l 8 * * - ic - so

<SS$$$EScR,.TtCN h NRC USE ONLY R lNiCl 7_ 4.J. so N/A l lIlIlIIIIIIIl}

64 69 sa. ;

NAk'E OF PREPARER

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- Attachment To I.ER 80-66/0iT'-

Beaver Valley Power: Station Duquesne Light Company Docket- No. 50-334 i -

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