05000293/LER-1980-031-04, /04T-0:on 800721,mussel Sample Concentration of Co-60 Exceeded 10 Times Lower Limit of Detection.Caused by Pilgrim Station Operation.Annual Dose to Humans Is Not Significant Per Reg Guide 1.109

/04T-0:on 800721,mussel Sample Concentration of Co-60 Exceeded 10 Times Lower Limit of Detection.Caused by Pilgrim Station Operation.Annual Dose to Humans Is Not Significant Per Reg Guide 1.109

ML19330B639
Person / Time
Site:	Pilgrim
Issue date:	07/30/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19330B636	List: 05000293/LER-1980-031, Forwards LER 80-031/04T-0 05000293/LER-1980-031-04, /04T-0:on 800721,mussel Sample Concentration of Co-60 Exceeded 10 Times Lower Limit of Detection.Caused by Pilgrim Station Operation.Annual Dose to Humans Is Not Significant Per Reg Guide 1.109
References
LER-80-031-04T, LER-80-31-4T, NUDOCS 8008050301
Download: ML19330B639 (1)

LER-1980-031, /04T-0:on 800721,mussel Sample Concentration of Co-60 Exceeded 10 Times Lower Limit of Detection.Caused by Pilgrim Station Operation.Annual Dose to Humans Is Not Significant Per Reg Guide 1.109

Event date:
Report date:
2931980031R04 - NRC Website

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LICENSEE EVENT REPORT b'" CONdt!L BLOCK:

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60 61 DOCK ET NUMSER SB 69 EVENT DATE 14 75 REPORT OATE 80 EVENT OESCRIPTION AND PROBA8LE CONSEQUENCES h iol2l l On July 21, 1980 Boston Edison received an analyses report from the Yankee Atomic l

io i3i l Electric Laboratory which indicated that a reportable concentration of Co-60 l

io i4 i l (48.3 + 1.4 pC1/kg) existed in a mussel sample taken from the Pilgrim Station l

loi3; l discharge canal outfall area on 4/8/80. This concentration is in excess of 10 times l o s l

the lower limit of detection at the control station in Marshfield (4.7 pCi/kg).

l [TTT] l This insignificant concentration represents no risk to the public health and l

l o Ie i i safety.

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JJ 34 JS 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li j ol l The presence of Co-60 in this discharge sample is due to operation of the Pilgrim l

gl Station. However, even if a person ware Po directiv consume mussels at the rate I

i,i2l l given in Regulatory Guide 1.109, the annual dose to that person would oniv be I

i 3 l about 1.3 x 10-3 mrem to the total body and 9.7 x 10-3 mrem to the maximum exposed l 3 4 l

organ (CE-LLI).

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