ML19345A977

LER 80-077/01T-0:on 801114,overstress Condition Determined to Exist on Main Steam Line Branch Line Support.Caused by Thermal Movement of Main Steam Line Affecting Branch Line Support.Pipe Support Rod Completed

ML19345A977
Person / Time
Site:	Beaver Valley
Issue date:	11/17/1980
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345A976	List: ML19345A975 ML19345A977
References
LER-80-077-01T, LER-80-77-1T, NUDOCS 8011250520
Download: ML19345A977 (2)

Text

_ . . 4 _ . -

4 U. S.NUCLtAR REGULATORY COMMISSION NRC Ma4 3SS (1- '

LICENSEE EVENT REPORT l (PtEASE PRINT OR TYPE ALL REQUIREO INFORMATIONI CONTMOL SLOCK: l i

l l l l lh 6

l [

lo til IF l A l B IV lS l 1 l@l 0 l0 l- 101010 useNse Nuveen l010 l- (0 l 0al@p .=

!1ucEut l1 11Tvet l1 al@l CAT 33 se @

i e s uCENsee Coot i. ts CONT l

lolil $ouay 1@l 0 l 5 l 01010 l 3 l 3 l 4 @l 1 ! 1 i 1 14 I8l0'@l 11 il il 71 al ol@

EVENT DESCR TION A OPRO8A CO SE ENCt3 j

[ o 101 l lt han been determined that an overstress condition exists on a main steam line ia;3; l branch line support. This branch line is to the main steam lines drains and steam l 1014j i trans. Loss of this line would have been an unisolable steam line rupture. A l

]

t o ! s 1 I break of this type is included in the plant safety analysis.

I

, lo !s t !

l lotilI t o ie ! I do 7 8 9 COMP. VALVE

$YSTEM CAUSE CAUSE SUSCCCE COMPONENT COCE SUSCCDE SusCODE CCDE COCE lojal 7 6 9 Ic Ic l@ l nl@ l Al@ l!3si ul Pi o! nl TI@ in l@ lM zi@

'O 11 12 4 13 A EVISION S EQU ENTI A L CCCUR AENCE REPORT CCCE Tvet NO.

ggg EVtNT VEAR REPORT *80.

@ asac:pn a7 lalol l-l l 01 71 71 1/1 to it l l Tl I-I 31 101 3

_ 21 a J3 ;4 26 '27 :3  ;) ., Q AT*ACHv E N T Nea04 PRIVf COvP. COMPONENT ACT!ON tuTun E EFFECT SHOTCCWN SUd ut T* E D SCRM dUS. $UpeU ER VANUFACTUALA TAAEN ACTION ON PLANr VETNGO NOUR$ 4 Ir'@lzi@ l zig I zl@ lo lo 10 t o I 2, .o ly l@

I n l@

2 lAl@ lo z l 91919 f(M 2

4 4

u . a  :.

CAUSE CESCRIPTION ANO CORRECTIVE ACTIONS h

[

IifoliThe cause of the overstress is due to the bal movement of the main steam line The pipe support modification has been completed]

] Iaffecting the branch line support.

I I ml I

t Lu_1.1 I I

L y,,4_J l so 3 4 9 AY DISCOVERY DESCR'PTION SN %PCwfR OTH ER STATUS D85 lti5llul@ lnl0lol@l nesien l lC l@lSnecialinspection $0 l

as 11 DOtt111CaC103 44 45 46 7 4 4 '9 Active TV CONTENT outdCc LOCATTON OP RELEASE og(gA$go CF aELEASE AMOUNT OF ACTtytTY N/A N/^ l L' La.) I : I @ L;J@l 44 I I e6 30 7 4 3 to 11

1. ERS

• set. E XPOSLRES wu g tv PE Ca sCRteTION -

lilrl10lol0i@lzl@l t 4 1 **  : 13 N/A so l PtatCNNEL tNJu stES

• .Lueta 3ESCRnPTION

N/A l li t il $101

? 3 o t o l@l 11 '2 83

'.:S:as 04g g;Claio Cavact TIC N 70 FactuTv%/Q Set

'A I Ii ! 2id iI : f(s 4

?

40

.1*VE t CAiPt:ON

-N/A 30112 5 09D I i i itil!Iii1: I.

I:iilNIdl 0 64 61 !Q . "

l 4 3

~

• 8* C#Y PHONE.  !.s -

i NAME CF #9EPARER

Attachment To LER 80-77/01T Beaver Valley Power Station Duquesne Lip,ht Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement.

l

,