ML20141C556

Forwards Maine Yankee Atomic Power Co Annual Radiological Environ Monitoring Rept Jan-Dec 1985. Program Sampling Results Discussed

ML20141C556
Person / Time
Site:	Maine Yankee
Issue date:	04/01/1986
From:	Whittier G Maine Yankee
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20141C559	List: ML20141C556 ML20141C566
References
7385L-SDE, GDW-86-85, MN-86-50, NUDOCS 8604070266
Download: ML20141C556 (2)

Text

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April 1, 1986 MN-86-50 GDH-86-85 Region I United States Nuclear Regulatory Commission Office of Inspection and Enforcement .

631 Park Avenue King of Prussia, Pennsylvania 19406 Attention: Dr. Thomas E. Murley, Regional Administrator [

Reference:

(a) License No. OPR-36 (Docket No. 50-309)

Subject:

Annual Radiological Environmental Surveillance Report Gentlemen:

Enclosed is the Annual Radiological Environmental Surveillance Report for the Maine Yankee Atomic Power Station. This report contains a summary and analysis of the radiological environmental data collected for calendar year 1985.

Several samples collected as part of the radiological environmental monitoring program indicated detectable levels of man-made radionuclides in cow milk, sediment, estuary water, and marine algae. In no case were the levels of radionuclides possibly related to plant emissions high enough to l result in public intake in excess of one percent of those that would result from continuous exposure to concentration values listed in Table II of Appendix B to 10 CFR 20.

The Cs-137 and Cs-134 levels detected in sediment were determined to be the result of a combination of nuclear weapons testing fallout and early plant l operation (prior to the installation of a diffuser for liquid effluents), and j have been discussed in previous reports. Tritium was detected in two estuary l water samples at the plant discharge outfall and was related to plant operations. Marine algae samples collected during June and July from the l

control location showed detectable levels of I-131. An investigation showed l

that the I-131 entered the area from the sewage treatment plant outfall in Boothbay Harbor, and was not related to plant operations. g I 7385L-SDE [i, B604070266 860401 /

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1 M AINE Y ANKEE ATOdlC POWER COMPANY United States Nuclear Regulatory Commission Page Two Attention: Dr. Thomas E Murley, Regional Administrator MN-86-50 Strontium-90 and Cs-137 were detected in all milk samples. These levels were similar to those found in the past and have previously been shown to originate from nuclear weapons testing fallout and to vary from farm to farm primarily as a result of diffeYences in the animals' diets.

Direct gamma radiation exposure using thermuluminescent dosimeters showed no significant increase in exposure rates at the inner ring of stations, the outer ring of stations, or at the control stations.

Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY

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G. D. Whittier, Manager Nuclear Engineering and Licensing - -

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Enclosure:

Subject Report cc: Mr. Ashok C. Thadani Mr. Pat Sears Mr. Cornelius F. Holden Mr. Donald Hoxie, Director, Department of Health Engineering Maine Department of Human Services American Nuclear Insurers Document Control Desk (18 copies) 7385L-SDE 1

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