05000206/LER-1981-030, Forwards LER 81-030/04L-0.Detailed Event Analysis Submitted

Forwards LER 81-030/04L-0.Detailed Event Analysis Submitted

ML20039C370
Person / Time
Site:	San Onofre
Issue date:	12/14/1981
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20039C371	List: 05000206/LER-1981-030, Forwards LER 81-030/04L-0.Detailed Event Analysis Submitted 05000206/LER-1981-030-04, /04L-0:on 811115,two Consecutive Weekly Air Samples Were Invalid.Caused by Improper Positioning of Filters.New Personnel Assigned
References
NUDOCS 8112290280
Download: ML20039C370 (2)

LER-1981-030, Forwards LER 81-030/04L-0.Detailed Event Analysis Submitted

Event date:
Report date:
2061981030R00 - NRC Website

text

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Southern California Edison Company WE S AN ONQFRE NUCLE AR GENER A TING S T A TION b

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December 14, 1981 53

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U. S. Nuclear Regulatory Commission 7

Office of Inspection and Enforcement Region V g

1990 North California h ulevard RECEtVED Suite 202, Walnut Creek plaza Walnut Creek, California 94596 S;

DEC2 81981 > :11 u samMW auns wass a hN Attention:

Mr. R. H. Engelken, Director g

f ru Docket No. 50-206 San Onofre Nuclear Generating Station Unit 1

Dear Sir:

This report is submitted in accordance with the requirements of Section 5.6.3b of the San Onofre Nuclear Generating Station provisional Operating License No. DPR-13, Apppendix B, (Environmental Technical Specifications).

The report describes an occurrence involving the Radiological Environmental Monitoring Program.

Two successive weekly air samples were determined to be invalid.

A review of the July 1981, laboratory report on environmental sampling, (received in mid-November 1981), revealed that two consecutive weekly air samples from the Huntington Beach control station were significantly belo',

expected background levels of gross beta activity.

These results were attributed to improper positioning of the filter within the sampic collection device which allowed a fraction of the sample air to bypass the filter. These two samples, collected July 20 and July 27, 1981, are therefore considered to be invalid.

The invalid background samples do not pose significant problem in the assessment of the tyoe and quantity of radionuclides in the environment. Air samples collected from Huntington Beach before and after this incident provide a satisfactory data base for comparison with air samples collected at San Onofre.

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.. The improper positioning of the air filters was due to coor technique on the part of personnel assigned to perform the filter change.

This task was the responsibility of Huntington Beach Generating Station personnel at the time of the incident, however, on August 17, 1981, San Onofre personnel assumed full responsibility for collection of air samples from the Huntington Beach Generating Station.

This was done to assure that proper b chnique and procedures are followed. No further incidents involving invalid air samples have been observed.

Should you require additional information on this matter, olease let me know.

Sincerely, M'5 %/n H. B. RAY STATION MANAGER

Enclosure:

Licensee Event Report 81-030 BG:0008u/ryh cc:

U. S. Nuclear Regulatory Commission Division of Reactor Operations Inspection L. F. Miller - USNRC Resident Inspector U.

S.

Nuclear Regulatory Commission Of.fice of Inspection and Enforcement U.S.

Nuclear Regulatory Commission Office of Management Infornation & Program Control (MIPC)

Institute of Nuclear Power Operations (INPO)