ML20082J045

RO 2-SR-83-29:on 831012,results of Gamma Analysis of Bottom Sediment Samples Detected Co-60.Sampling Frequency Increased from Semiannually to Monthly to Determine If Trends in Activity Level Can Be Predicted

ML20082J045
Person / Time
Site:	Brunswick
Issue date:	11/21/1983
From:	Dietz C CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RO-2-SR-83-29, NUDOCS 8312010360
Download: ML20082J045 (2)

Text

9 4-Cp&L Carolina Power & Light Company Brunswick Steam Electric Plant P. O. Box 10429

• 82 Southport, NC 28461-0429 November 21, 1983 FILE: B09-13510C SERIAL: BSEP/83-3637 Mr. James P. O'Reilly, Administrator U. S. Nuclear Regulatory Commission Region II, Suite 3100 101 Marietta Street N.W.

Atlanta, GA 30303 BRUN.; WICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-325 AND 50-324 LICENSE NOS. DPR-71 AND DPR-62 30-DAY NONROUTINE RADIOLOGICAL ENVIRONMENTAL EVENT REPORT (2-SR-83-29)

Dear Mr. O'Reilly:

Results of gamma analysis of two bottom sediment samples collected October 12, 1983, as part of Brunswick Steam Electric Plant's Environmental Radiological Monitoring Program, detected Co-60 at concentrations of 5.46 i 0.20 pCi/g at sample station No. 33 and 0.55 0.02 pC1/g at sample station No. 34. The analysis of these samples was completed on October 26, 1983. The MDA values for these stations are 0.18 pCi/g at sample station No. 33 and 0.02 pCi/g at sample station No. 34. The Co-60 activity found in these samples constitutes a 30-day reportable event in accordance with Technical Specifications Appendix B, Section 5.4.2b, pertinent to environmental sampling.

The Co-60 retivity found in these samples is reportable due to a factor of 10 increase above the MDA. There is no radiation hazard or exposure to the public due to this activity. There was no Co-60 found in surface water samples taken in the intake and discharge canals or in the ocean during October 1983.

These bottom sediment sampics were collected as part of an expanded surveillance program on bottom sediment in the discharge canal. The current sample results indicate an increase in activity at sample station Nos. 33 and 34 above the activity found in September 1983. It is not known if there is an actual increase in activity or if the higher activity levels found are due to sampling variables.

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, t' Mr. J. P. O'Reilly The sampling frequency for bottom sediment samples has been increased from semiannually to monthly in order to more closely monitor the activity levels

in the canal and to determine if trends in the activity levels can be predicted.

Very truly yours, c3. op C. R. Dietz, General Manager Brunswick Steam Electric Plant AHC/c1h/ LETCH 2 Enclosure cc: Mr. R. C. DeYoung NRC Document Control Desk l