BSEP-84-0027, RO 2-SR-83-36:bottom Sediment Sample Gamma Analysis Collected on 831201 Detected Abnormal Co-60 Concentration. Sampling Frequency Increased to Monthly to Closely Monitor Co-60 Activity

RO 2-SR-83-36:bottom Sediment Sample Gamma Analysis Collected on 831201 Detected Abnormal Co-60 Concentration. Sampling Frequency Increased to Monthly to Closely Monitor Co-60 Activity

ML20079H794
Person / Time
Site:	Brunswick
Issue date:	01/12/1984
From:	Dietz C CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
BSEP-84-0027, BSEP-84-27, RO-2-SR-83-36, NUDOCS 8401240003
Download: ML20079H794 (2)

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Brunswick Steam Electric Plant P. O. Box 10429 Southport, NC 28461-0429 January 12, 1984 FILE: B09-13510C SERIAL: BSEP/84-0027 Mr. James P. O'Reilly, Administrator r U. S. Nuclear Regulatory Commission Region II, Suite 3100 101 Marietta Street N.W.

Atlanta, GA 30303 BRUNSWICK 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-83-36)

Dear Mr. O'Reilly:

Results of gamma analysis of a bottom sediment sample collected December 1, 1983, as part of Brunswick Steam Electric Plant's Environmental Radiological Monitoring Program, detected Co-60 at a concentration of 1.25 0.04 pCi/g at sample station 33. The analysis of this sample was completed on December 20, 1983. The MDA value for this sample is 0.05 pCi/g. The Co-60 activity found in this sample constitutes a 30-day reportable event in accordance with

. Technical Specifications Appendix B, Section 5.4.2b, pertinent to environmental sampling.

This bottom sediment sample was collected as part of an expanded surveillance program on bottom sediment in the discharge canal. The current sample results indicate decreasing activity at this sample station. It is not known at this time if this is an actual decrease in activity or simply due to sampling variables.

The Co-60 activity found in this sample 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 from the intake and discharge canals or from the ocean during December 1983.

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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 Co-60 activity and to determine if trends in the activity levels can be predicted.

Very truly yours,

, i C. R. Dietz, General Manager Brunswick Steam Electric Plant AHC/cjj/LETCG2 cc: Mr. R. C. DeYoung NRC Document Control Desk 4

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