05000293/LER-1980-014-04, /04T-0:on 800418,Yankee Atomic Environ Lab Notified Util That Milk Sample Contained High Concentration of Cs-137.Cause Unknown,Probably Not Result of Plant Effluent

/04T-0:on 800418,Yankee Atomic Environ Lab Notified Util That Milk Sample Contained High Concentration of Cs-137.Cause Unknown,Probably Not Result of Plant Effluent

ML19312D905
Person / Time
Site:	Pilgrim
Issue date:	04/28/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19312D902	List: 05000293/LER-1980-014, Forwards LER 80-014/04T-0 05000293/LER-1980-014-04, /04T-0:on 800418,Yankee Atomic Environ Lab Notified Util That Milk Sample Contained High Concentration of Cs-137.Cause Unknown,Probably Not Result of Plant Effluent
References
LER-80-014-04T, LER-80-14-4T, NUDOCS 8005050340
Download: ML19312D905 (2)

LER-1980-014, /04T-0:on 800418,Yankee Atomic Environ Lab Notified Util That Milk Sample Contained High Concentration of Cs-137.Cause Unknown,Probably Not Result of Plant Effluent

Event date:
Report date:
2931980014R04 - NRC Website

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WRC F ORM 366 U.S. NUCLE AR REGUL ATORY COMMIS$10N j

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h i

10l2l l On April 18, 1980, Boston Edison Company received information from the Yankee l

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i n lT] l an indicator station (Plimouth Plantation - 2.2 miles west of the plant) contained l h

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a concentration of Cs-137 of 24.7 pCi/ kilogram. This concentration was ten (10) l 1

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O BOSTON EDISON COMPANY PILGRIM NUCLEAR POWER STATION DOCKET NO. 50-293 Attachment to LER 80-014/04T-0 On April 18, 1980, Boston Edison Company received information from Yankee Atomic Environmental Laboratory that indicated that a sample of milk collected from an indicator station contained a concentration which was ten (10) times the measured control station concentration. It is very unlikely that this measurement is the result of plant ef fluents since the measured releases for the prior six months would have resulted in a calculated concentration of Cs-137 in milk that would be 5 orders of magnitude lower than the measured concentration (using the nodels presented in Regulatory Guide 1.109). The calculated dose due to consumption of milk containing the measured concentra-tion for a full year would be 5.0 millirem to the most restrictive organ, (infant-liver) and 0.55 millirem to the total body (adult).

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