ML20202H404
| ML20202H404 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/05/1997 |
| From: | Medling E SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9712100272 | |
| Download: ML20202H404 (2) | |
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December 5, 1997 U. S Nuclear Regulatory Commission Attention: Document Contrul Desk Washington, D.C.
20555 Gentlemen:
Sub,iect:
Docket No. 50-206 Special 30-Day Report P.adiological Environmental Opeiating Report San Onofre Nuclear Generating Station, Unit 1 Offsite Dose Calculation Manual (ODCM), Section 5.2.1, Action B.1 for San Onofre Unit 1 Facility Operating (Possession Only) License No. DPR-13 requires a 30-day written report'when the land use census identifies a location which yields a calculated dose greater than the values currently calculated.
The analysis of land use census data performed on November 18, 1997 indicated a dose greater than the dcse currently calculated. Tho newly identtfied location, where outage support workers resided in campers, is Parking Lot 4A in Sector Q at 0.5 miles from the Unit I release point. The calculated annual radiation dose was 1.2 x 10 mrem due to Unit 1 airborne effluents.
This was an increase of 22% over the value currently calculated for the receptor at San I
Onofre Mobile Home Park (9.87 x 105 mrem), at 1.2 miles in the same Sector, Q.
The increased dose resulted from the combination of the occupancy for Parking Lot 4A-(due to the long duration of the Unit 2 and Unit 3 Cycle 9 jU refueling outages) and the close proximity of the Parking Let to Unit 1.
The I
calculated dose at Parking tot 4A duo to Units 2/3 airborne releases did not exceed the currently calculated dose at Saa Onofre Mobile Home Park.
Detailed' dose calculations indicated there is no need to add any sampling locationsaccordingto00CMrequirementsforUnit1orUnits2/3.
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If you require any-additional infortnation, please advise.
Sincerely, jf v Y cc:
E. W. Merschoff, Regional Administrator.NRC Region IV K. E. Perkins, Jr., Director, Walnut Creek Field Office, NRC Region IV M. K. Webb, NRC Project Manager, San Onofre Unit 1 H. B. Fields, NRC Project Manager, San Onofre Units 2 and 3 L. C. Carson, Regional Project Inspector, San Onofre Unit 1 J. A. Sloan, NRC Senior Resident Inspector, San Onofre Units t & 3 S. S. Bajwa, Section Chief, Deconnissioning Section L. Brown, California Department of Health Services
.