ML20040C622

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Ro:On 811217,gamma Analysis of Nov 1981 Milk Samples Revealed Cs-137 Activity at Reportable Level.Elevation in Activity Due to Mineral Recycling Phenomena Indigenous to Area Observed Since 1972
ML20040C622
Person / Time
Site: Brunswick  Duke Energy icon.png
Issue date: 01/13/1982
From: Dietz C
CAROLINA POWER & LIGHT CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8201290092
Download: ML20040C622 (2)


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USNRC-R bCN *? i Carolina Power & Light Company ,., b A NT4

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-Brunswick Steam Electric Plant P. O. Box 10429 Southport, NC 28461-0429 January 13, 1982 e x

FILE: B09-13516.2 #

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SERIAL: BSEP/82 _ IVED 9- -

Mr. James P. O'Reilly, Director  ; # d/lfig 798gg [

U. S. Nuclear Regulatory Commission Region II, Suite 3100- 9 7 101 Marietta St.reet, N.W.

Atlanta, GA 30303 4 to BRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 LICENSE NOS. DPR-71 AND DPR-62 DOCKET NOS. 50-325 AND 50-324 30-DAY NONROUTINE RADIOLOGICAL ENVIRONMENTAL EVENT REPORT 7

Dear Mr. O'Reilly:

Results of gamma an'alysis of monthly composited milk samples, collected during November 1981, as part of Brunswick Steam Electric Plant's Environmental Radiological Monitoring Program, detected Cs-137 at a concentration of 142 5' pC1/1 at milk sampic station No. 35. The analysis was completed on December 17, 1981. Station No. 37 (control station) revealed Cs-137. activity at a concen '

tration of 7.19 i 3.16 pCi/1. The Cs-137 activity found in this sample consti-tutes a 30-day reportable event in accordance with Brunswick Technical Specifi-cations, Appendix B, Section 5.4.2b, pertinent to environmental sampling.

An evaluation of the Brunswick plant release data has indicated that the observed . elevation of Cs-137 activity in the milk is not attributable to Brunswick plant' operations.

The elevated levels of Cs-137 in the milk of this cow have been observed since the pre-operational Radiological Surveillance Program began in 1972. It is believed that these levels of Cs-137 are due to a unique mineral. recycling phenomena that is indigenous to this area. This was reported to the U.S.

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James P. O'Reilly 2 January 13, 1982 l

l Nuclear Regulatory Commission in Followup Report on Nonroutine Environmental Radiological Event, dated July 24, 1981 (Serial BSEP/81-1400), pertaining to elevated 1cvels of Cs-137 in milk at sample station No. 35.

Very truly yours,

'Q C. R. Dietz, Gehdral Manager Brunswick Steam Electric Plant RMP/tt Enclosure cc: Mr. V. Stello, Jr.

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