05000373/LER-1982-026, Forwards LER 82-026/03L-0.Detailed Event Analysis Encl

Forwards LER 82-026/03L-0.Detailed Event Analysis Encl

ML20054J762
Person / Time
Site:	LaSalle
Issue date:	06/24/1982
From:	Holyoak R COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20054J763	List: 05000373/LER-1982-026, Forwards LER 82-026/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8206290534
Download: ML20054J762 (2)

LER-1982-026, Forwards LER 82-026/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3731982026R00 - NRC Website

text

-. -.

l N

Commonwrith Edison c

LaSalle County Nuclear Station Rural Route #1, Box 220 Marseilles, Illinois 61341 Telephone 815/357-6761 June 24, 1982 James G. Keppler

'l Regional Administrator Directorate of Regulatory Operations, Region 111 U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Sir:

Reportabic Occurrence Report #82-026/03L-0 Docket #050-373 is being submitted to your office in accordance with LaSalle County Nuclear Power Station Technical Specification 6.6.B.2.d, abnormal degradation of systems other than those specified in item B.I.c above designed to contain radioactive material resulting from the fission process.

k R. H.

'k Super den LaSalle County tation RHH/GW/djp Enclosure cc:

Director of Inspection & Enforcement Director of Management Information & Program Control U. S. NRC Document Management Branch inpo-Records Center File /NRC 8206290534 820624 dN N

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PDR ADOCK 05000373 O

PDR 7cjL

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l.

LER NUMBER:

82-026/03L-0 ll.

LASALLE COUNTY STATION: Unit 1 til. DOCKET NUMBER:

05000373 IV.

EVENT DESCRIPT10N' On May 26, 1982, 6 floor drain and equipment drain sumps were inspected.

The inspection consisted of determining if the subfloor drain' piping had

~

a closure seal at the point it penetrated the sump liner.

No sealing welds were found on the lines that penetrated the sump liners.

V.

PROBABLE CONSEQUENCES OF THE OCCURRENCE Af ter a long period of time there is a low probability that radioactive effluents could have been released to the environment through the process

, of leaching through the concrete if the seals were not in place.

Since the required seals were completed before initial criticality and no-contamination has ever been present in the sunps, no radioactive material has been or will be released via this path.

VI.

CAUSE

Drawings A-529 and A-598 Indicated that the liners should have been sealed at the penetration but no record of installing the seals could be located.

..e Vll. CORRECTIVE ACTION CECO construction department has sealed the required sumps as listed below:

1.

1RE03 24.

OTF06 2.

1RE04 25 ODA01 3

1RE07 26.

OTF16ASB 4.

1RE08 27 2TF09 5

1RE075 28.

1TF09PA&B 6.

1RF02 29 1DR01 sump 7

IRF03 30.

1DROI solids. separator 8.

1RF04 31.

2DR01 sump 9

ODR01 32.

2DROI solids separator 10.

ITF03PASB 33 OTF07PASB 11.

OTE02PASB 34.

OTF12PA&B 12.

1TE02PA&B 35 ODLO1PA&B 13 OTF08PA&B 36.

ODT03P 14.

1TF10PA&B 37 1DT01 15 OTF09PA&B 38.

1DT02 16.

OTF17 39 1DT03 17 OTF13 40.

ODM04 18.

2TF10 41.

ODM03 19 1TF08 42.

1DT04PA,BSC 20.

2TF03 43 1DT04 21.

OTF04PA&B 44.

00D01PA&B 22.

ITF02PASB 45 10001PA&B 23 OTF14 46.

10D02PA&B Present Administrative and Quality Control Procedures are adequate and it is believed that this was an isolated incident.

Preocred by:

K. Vittenbure