05000373/LER-1982-083, Forwards LER 82-083/01T-0

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Forwards LER 82-083/01T-0
ML20063A117
Person / Time
Site: LaSalle Constellation icon.png
Issue date: 08/17/1982
From: Holyoak R
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20063A120 List:
References
NUDOCS 8208240200
Download: ML20063A117 (1)
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LER-2082-083, Forwards LER 82-083/01T-0
Event date:
Report date:
3732082083R00 - NRC Website
v • d • e

text

s C!mm:nw;;lth Edison c LaSa!!e County Nuclear Station Rural Route #1. Box 220 L/ Marseilles, Illinois 61341 Telephone 815/357-6761 August 17, 1982 James G. Keppler Regional Administrator Directorate of Regulatory Operations Region 111 U.S. Nuclear Regulatory Commission - r]

'4' D V-799 Roosevelt Road '

Glen Ellyn, 11 60137

Dear Sir:

Reportable Occurrence Report #82-083/01-T-0 Docket #050-373 is being submitted to your of fice in accordance with LaSalle County Nuclear Power Station Technical Specification 6.6.b.l. (1), performance of structures, systems, or components that requires remedial action or corrective measures to prevent operation in a manner less conservative than assumed in the accident analyses in the SAR or Technical Specifications bases, or discovery during plant life of condi tions not specifically considered in the SAR or Technical Specifications that require remedial action or corrective measures to prevent the existence or development of an unsafe condi tion.

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. a upe ri n e Lada e County ation RHH/GW/J fe Enclosure cc: Director of Inspection & Enforcement Di rector of Management Information & Program Control U.S. NRC Document Management Branch inpo-Records Center File /NRC 820 8 z4 0 2.00 3 nuc19 M

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.) ; t'-aa Vx duct work were found to have visually unaccentable weide. -

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.1 ,.;. g.rel,ating 10 welder qualifications and shno travalore . cern n r, of Zack Quality related records, and the welds involved. Visuallv unacceotable welds t were found. 1800 ho'urs on Aug'ust 4,1982 work becan to renei r the vi <:ual Iv onaccenta5Ye

_L i: t l At 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> on August 7,1982, the Vx sys tem was declared onorable. As a i

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l. LER NU!GER: 82-063/OlT-0 g

l i .' LASALLE , COUNTY STATION: UNIT i 111. DOCKET nut'S,ER: - r 5 0- 17.1 r. -

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IV. EVENT DESCRIPTION,'. ,' r After an ins;;ec' tic'n .of. c.sr ta in portions of Unic 2 duct work, three sections of the Vx duct work.'were found to have visually unacceptable welds. These

- ducts, iri the' event of 4 seismic occurrence, nay have not remained intact, therefnre on Augus t 4,r1982 conservative measures wqre taken and'the Unit 2

. Vx sys tem was dec la re d i r= ope rat ive. <

V. PROBABLE CONSEQUENCES JF tie OCCURRENCE:

At the time of the occbrrence. LaSalle Statica Unit l'was in the startup rnode (mode 2) undergoing initial heatyp phase testing'. Temperature limi ts ,

is speci fied by T.S. 3. 7. 7 Table 1, were not exceeded in the Uni' 2 Division 2 Swi tchgear rcom during the time period the Vx system was i noperable. No equipment was degraded. Safe ope ~ ration of the facility was maintained'at all times. -

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VI. CAUSE: ,

As.Ja result of $be%Zack Company 's notificaticn of a 10CFR21 concerning discrepancies

, re la t i n g t o we l de r q'ua l i f-! ca t i on s an d s hop travelers , CECO Q. A. initiated a y review of Zack' Quality related records, and the welds involved. As a result of the inspection, three sections of the Vx duct work were found to have visually unacceptable Ocids due to porosity and weld profile.

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Vll. CORRECTIVE ACTION: --

At 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> on August 4, 1982, work began to repair the <sisually una/ceptable weids. The work was completed by 1930 hours0.0223 days <br />0.536 hours <br />0.00319 weeks <br />7.34365e-4 months <br /> on August 6,1982 and the Vx

, system was declared coerable at 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> on August 7, 1982.

As a~condi. tion of exceed 50i' howa r, Commonweal th. Edison wi ll p rovide the

'results fro.n an ;ndependent stddy concerning the HVAC.

f Prepared by: J. Conarde i /

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