05000293/LER-1981-010-04, /04T-0:on 810407,rept Received Indicating Excessive Co-60 Concentration in Mussel Sample Taken from Discharge Canal.Cause Not Stated.Dose Insignificant When Compared to Natural Background Dose

/04T-0:on 810407,rept Received Indicating Excessive Co-60 Concentration in Mussel Sample Taken from Discharge Canal.Cause Not Stated.Dose Insignificant When Compared to Natural Background Dose

ML20003G475
Person / Time
Site:	Pilgrim
Issue date:	04/21/1981
From:	Whitney G BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003G474	List: 05000293/LER-1981-010, Forwards LER 81-010/04T-0 05000293/LER-1981-010-04, /04T-0:on 810407,rept Received Indicating Excessive Co-60 Concentration in Mussel Sample Taken from Discharge Canal.Cause Not Stated.Dose Insignificant When Compared to Natural Background Dose
References
LER-81-010-04T, LER-81-10-4T, NUDOCS 8104290581
Download: ML20003G475 (2)

LER-1981-010, /04T-0:on 810407,rept Received Indicating Excessive Co-60 Concentration in Mussel Sample Taken from Discharge Canal.Cause Not Stated.Dose Insignificant When Compared to Natural Background Dose

Event date:
Report date:
2931981010R04 - NRC Website

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b EVENT DESCRIPTION Af.O PRCH1.BLE CONSEOUENCES h report f rom Yankee Atomic Laboratory j

lo!?) lOn April 7, 1981, Boston Edison received a inindica ting a concentration of Co-60 (53.2 16 pCi/kg) in a mussel sample taken f rom ;

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(4. 8 pCi/kg). The raxinum dose to an individual for a full year would j lo is] I l0 }6 j l be only 1.07 x 10 ~ mrem to the most res t ric tive or gan (adult).

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PILGP.~M NUCLEAR PO'iEF. STATION DOCKET NO. 50-293 At tac'. : ent to LEE SI-010/04 T-0 l

On April 7,1981, Bosten Edison -received an analyses report from the Onkee Atomic Electric Laboratory which indicated that a reportable concentration of Co-60 (53.2 16 pCi/kg) existed in a russel sample taken f rom the Pilgrim Station Discharge Canal'on Parch 12, 1981.

This concentration is in ncess of 10 times the Lower Linit of Detection at the Control Station in Parshfield (LLD for Co-60 was 4.8 pCi/kg).

l The raximum dose to an individual consuming seafood with this concentration for a full year would be only 1.4 x 10-3 nrem to the total body (child), and 1.07 x 10-2 nrem to the rest restrictive organ (adult GI-LLI).

Clearly, this dose is not sig-nificant when corpared to the natural background dose rate of 80 to 100 nrem/ year.

Therefore, it is concluded that there is no risk to the health and safety of the public.

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