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| ~ B ALTIMORE GAS AND ELECTRIC CHARLES CENTER . P.O. BOX 1475 BALTIMORE, MARYLAND 21203 CLECTRIC ENGINEERING DEMRWENT October 11, 1982 Mr. Ronald C. Haynes Office of Inspection and Enforcement Region I. U.S. NRC 631 Park Avenue King of Prussia, PA 19406
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| ==Dear Mr. Haynes:==
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| ==Subject:==
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| Calvert Cliffs Nuclear Power Plant Units Nos. 1 and 2 License Nos. DPR-53 and 69 Nonroutine Radiological Environmental Operating Report This report is submitted to comply with the requirements of Appendix B Environmental Technical Specification Section 5.6.2.b.
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| Oyster samples were collected on August 27, 1982 from tb Camp Conoy sampling location and analyzed for gamma-emitting radionuclides as required.- The results of the analyses shoved the presence of Ag-110m
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| - at 496!9 pCi/Kg(vet). The oyster samples collected on the same date from the Kenwood Beach sampling location (the background location) showed Ag-110m at 12 3 PCi/Kg(vet).
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| Detectable concentrations of Ag-110m were also observed in the crab samples collected during August, 1982 from Kenwood Beach, Rocky Point and Plant Site. The activity levels ranged f)om 17 3 pCi/Kg(vet) at Kenwood Beach to 57*8 pCi/Kg(vet) at Plant Site.
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| Radioactive releases in the first half of 1982 for all isotopes have been within the allowable limits specified in the Environmental Tech-nical Specifications. The. natural tendency of oysters to highly concentrate environmental silver is the cause of this event as was the cause of other similar events that were observed and reported during 1977-1980.
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| m C210190730 821011 PDR ADOCK 05000317 PDR
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| Mr. Ronald C. Haynes October 11, 1982 If the activity level of Ag-110m observed in shellfish samples
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| . during this sampling period were to last during the balance of 1982 (ignor-ing any decrease in-activity due to natural radioactive decay and depuration) then the doses to the GI-Tract and the Whole Body of a maximum exposed indi-
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| . vidual .(vith the consumption rate of 5 Kilogram / year and the dose conversion factors as recommended in Reg. Guide 1.109 are estimated at less than 0.1 m rem /yr and less than 0.1 x 10-3 m rem)/yr, respectively during 1982.
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| These doses are small fractions of the allowable limit of 25 m rem / year to members of the general public as set forth in 140 CFR Part 190 " Environmental Radiation Protection Standards for Nuclear Power Operations," and are there-fore considered to be of insignificant consequence to the health and safety of the public. .
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| Beginning with October and lasting through December 1982 ve plan to take monthly samples of oysters from the sampling locations at Kenwood Beach and Camp Conoy. The samples vill be analyzed for complete gamma spectrum to maintain a close watch on environmental radioactivity levels in the shellfish.
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| Very truly yours,
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| Gary R. Fuhrman, Director Environmental Studies & Monitoring GRF:eml ec: Director Office of Nuclear Reactor Regulation Washington, DC 205$9 (17 copies)
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| Dr. Steven M. Long State of Maryland Mr. R. E. Architzel NRC Resident Inspector Calvert Cliffs 1
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