ML20040A577

LER 81-039/03L-0:on 811218,found Leaking Weld on Discharge Side of 1C Charging Pump Relief Valve CVC-101C.Caused by Weld Fatigue Attributed to Vibrations & Pulsations in Associated Piping.Pipe Replaced.Design Change in Progress

ML20040A577
Person / Time
Site:	Kewaunee
Issue date:	01/15/1982
From:	Sauer D, Smoker C WISCONSIN PUBLIC SERVICE CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040A575	List: ML20040A574 ML20040A577
References
LER-81-039-03L, LER-81-39-3L, NUDOCS 8201210260
Download: ML20040A577 (1)

Text

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I2lh 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h Io l2l l During normal op'eration, a leakinz weld (cracked weld) on the discharge side of l g,g l 1C charging pump relief valve (CVC-101C) was discovered during routine inspection. l The crack was on the downstream side of the relief valve on the line connecting the l

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[n Isl l relief dischirge to the Volume Control Tank (VCT). The integrity of the Chemical andi I o 16 l l Volume Control System was maintained in that the relief valve did not lift and a l 1017 ] l check valve is provided on the VCT side. This is reportab1e as an abnormal l l 0 l81 1 degradation of a system designed to contain a radioactive material (T.S. 6.9.2.b.(4). [

i a9 There was no effect on public safety or plant operation. 80 SYST E *.1 CAUSE CAUSE CO* tP. VALVE CODE CODE SUDCODE COMPONENT COOE SUBCODE SUSCODE Etuu8 I p l c l@ LeJ@ tsJ@ l e i t I P It lx lx l@ l A l@ 12.J @

9 to 7 11 12 13 18 19 20

_ SEQUENTI AL OCCURRENCE REPORT REVISION LER/Ro EVENT YEAR REPOHT NO. CODE TYPE N O.

@,ajr,L1 18lli 21 22 1-1 2J Io'3191 24 L<]

27 10131 28 It l 30 1-1 toJ 2G 29 31 32 T KEf A TC O PLANT iT HOUnS SB IT D FO 1 US. 5 PLIE MAN FACTURER L^J@l 3J J4 r l@ Iz I@

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42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lt loll The weld faticue. and subsecuent crackinc has been attributed to vibrations and -

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[_i p_j l pulsations in the associated piping. The pipe section was replaced. The new welds I y,,7; j and piping were hydro-tested satis factory. A design change is in progress to add l

[g l suction stabilizers to the charging pump suction headers. The design change is il l

I i 14 I I scheduled for completion during the 1983 refueling ou ta ge . l 7 8 9 80 ST S  % POWER OTHER STATUS 15 RY -

OtSCOVERY DESCRIPTION l t l 5 l [E_j@ l 1 l 0 l 0 ihl NA l l A l@l Operator observation l i 8 ' "

A$TIVITY CO Gi RCLEASED OF HELE ASE '

AVOUNT OF ACTIVITY LOCATION OF RELEASE i o l I n^ l i 8 9 LzJ @ L2J@l to is n^ 44 45 80 PERSONNEL EXPOSURES NUVBER TYPE DESCntPTION '

Ii I 7 I I o I o I o l@lzj@l NA I PEnSONw't imu','iES "

NoveER DESCRIPTION @

[Maj l o l o lo l@l NA I F 0 9 11 12 80 LOSS OF OR DAMAGE To FACILtTY TYPE DE SCHIP TION i o I zi@!10 n^ l 1 0 9 80 5%$UE DESCRIPTION ,, .

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• 414 - 388-2560

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