05000334/LER-1981-014-01, /01T-0:on 810221,while Preparing for Plant Startup,Weld Leak Occurred in Rcs.Cause of Weld Failure Is Unknown.New Procedure Was Implemented & Instrument Line Relocated.Followup Rept Will Be Provided

/01T-0:on 810221,while Preparing for Plant Startup,Weld Leak Occurred in Rcs.Cause of Weld Failure Is Unknown.New Procedure Was Implemented & Instrument Line Relocated.Followup Rept Will Be Provided

ML19347D440
Person / Time
Site:	Beaver Valley
Issue date:	03/09/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19347D437	List: 05000334/LER-1981-014, Forwards LER 81-014/01T-0 05000334/LER-1981-014-01, /01T-0:on 810221,while Preparing for Plant Startup,Weld Leak Occurred in Rcs.Cause of Weld Failure Is Unknown.New Procedure Was Implemented & Instrument Line Relocated.Followup Rept Will Be Provided
References
LER-81-014-01T, LER-81-14-1T, NUDOCS 8103170609
Download: ML19347D440 (2)

LER-1981-014, /01T-0:on 810221,while Preparing for Plant Startup,Weld Leak Occurred in Rcs.Cause of Weld Failure Is Unknown.New Procedure Was Implemented & Instrument Line Relocated.Followup Rept Will Be Provided

Event date:
Report date:
3341981014R01 - NRC Website

text

.-

, f7 77)

U.S. NUCLEAR RECULATO3Y COMMISSION esRC FOAme3es LICENSEE EVENT REPORT CONTMOt. SLOCaC: l l

l I

I

! lh (ptgAsf pelNr CR TYPE ALL REQUIREO INFORMAff 0N) f7Til i P l A l 3 l V l S l 1 l@l 0 l 0 l-l 0 10 l 010 l 0 l-l0 l 0 l@p l1 l1 l1 l1 l@l l

l@

P 8 9 LACENs4E CaoE 14 IS uCENSE NwuSER aS

.4 uCENSE TYPE 40

$1 4A T So CCN'T lolil Q [L@l 015 l 0 l 010131314 @l 01212 l 1181 1 @l 01 11 Of of Al ll@

F S

60 et ooCKET % MSER ed 60 EVENT CATE 14 IS REPoRTcATE 80 EVENT OfSCRIPTION ANO PM08A8LE CCNSECUENCES h lAt 1130 hours0.0131 days <br />0.314 hours <br />0.00187 weeks <br />4.29965e-4 months <br /> on 2/21/81 while preparing for plant startup, a Reactor Coolant System l a 2 g l(RCS) leak initially calculated at 0.5 GPM was discovered. After a subsequent RCS l

[ inventory yielded a leak rate of 2.7 GPM, a plant cooldown was comnenced at 0100 l

o A [TTip lhou'rs on 2/22/81. At 1100 hours0.0127 days <br />0.306 hours <br />0.00182 weeks <br />4.1855e-4 months <br />, the leak was identified at the weld where the l

FITe1 I[RC-Ill valve nipple penetrates the RCS boundarv. The public health and safety was l lo i r l l not affected since the leak develooed with the olant shutdown and was contained I

g I within the containment buildinct.

I 7

8 9 80 SYSTEM

CAusE

CAusE COMP.

VALVE CoOE CooE SuscooE COMPONENT CooE susCooE sueCoot ITTTl IC la l@ l xl@ Iz l@ l zl zl zi zl zl zl@ l zi@ l zl@

F S

9 10 11 12 13 18 19 IG SEQUENTIAL OCCURRENCE REPORT REVf$loN LE R EVENr vEAR REPCRT No.

COoE TYPE N o.

O",a g/Ro 18111 1-1 l 01 11 41

.l /l I of 11 i Tl l.]

lol g

_;l 22 23 24 26 27

.S 29 Jo 31 J2 E

o P

r M

HOUR $

sa soR 8.

suppLIE MANypA RER l xJ@LzJ@

lcl@

I zl@

lofofolof lY l@

l N l@

lzl@

l z l 9 l 9 l 9 l@

3J 34 25 26 37 40 41 42 43 44 47 CAUSE OESCRIPTION AND CCRRECTIVE ACTIONS h li6o1IThe cause of the veld failure is unknown. To effect repair, a procedure was devised; ii,ig lwhere the RC-ll instrument line was cut off at the nipple between the RCS boundary l

land the veld crack, a plug was fitted, and then welded into place. The instrument I

g l line was relocated at valve RC-28 of f of the B Loop hot leg.

Work was completed on l I 3/7/81. A follow-up report will be sent as additional information becomes available.l i A 7

a 9 80 orwER status @

5:'sEo,EN

's'i AE

- s nowta ciscovtRv oEsCRirTroM l

1i 15 l l_CJ@ l 0 l 0 l 0 l@l N/A l

l A l@l Maintenance personnel observation l

l

4 g

i2 n

4.

4s so AMoVNTo, AeTiviTv @ I LOCATION o, RELEASE @

Ld5J llJ (E. NELE4st) I zl@l

,EtEAsto N/A I

N/A I

?

S 9 13 In 44 45 33 PER$oNNEn. E xPCsyR($

NUMBER TYPE oEsCRIPT1oM d

I i

Ld.2J l 0 I o I o l@l z l@l N/A I

' ' E so~NE'L%UAEs etscR PrioNh w vena t i l 101 o I o !@l N/A l

5 7

4 J tt 12 60 LCss OF on cauaGE TO FACILITY Q j

T PE OEsCRsPino%

v l_'z_j@l N/A

[

I i 9 I

d i 1J SO E sCRiFTION l

tsstJEf81 L1!.

N/A I

IIIiiitiiiiili l

2 '

3 3 A

3 63 69

80. ;

b*

3 U NAME O. PREPARER P'4CtJ E; 8103170(,07

Attachment To LER 81-14/OlT Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 The cause for the veld failure and the extent of this problem are not known at this time. A follow-up report will be sent addressing these questions as more information becomes available.

Y 4