ML19249A530

LER 79-029/04T-0 on 790710:Camp Canoy 790613 Samples Showed Higher than Normal Ag-110 Levels.Caused by Introduction of More Sensitive Sampling Technique

ML19249A530
Person / Time
Site:	Calvert Cliffs
Issue date:	07/23/1979
From:	Eherts R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19249A523	List: ML19249A522 ML19249A530
References
LER-79-029-04T, LER-79-29-4T, NUDOCS 7908230530
Download: ML19249A530 (2)

Text

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60 68 DOCK ET NUMB ER 68 69 EVENT DATE 74 75 REPORT D ATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES O'o 1012] 1 0yster samples collected on 6/13/79 from the Camp Canoy location and analyzed I o 3 as required by Section 3.2, Appendix B, Environmental Technical Specification, l l o i,i l showed Ag-110m at 172 + 5% pCi/kg (wet). Background location showed Ag-110m I

o 3  ; at less than or equal to 5 pCi/kg (wet). Based on the observed levels, a,verage l 0 e individual doses to the GI Tract and Whole Body are very small fractions of I o ,  ; the allowable doses to members of the general public (40CFR Part 190) and l g g  ; are of no consequence to the health and safety of the public. l

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32 TAK N A T CN CN PL NT M T HOURS 22 S8 IT FOR 8. SLPPLIE MANUFACTLRER l3Jg g [34G J g l5z lg 3 [36zl@ 37 l0 l0 l0 lU l 4 40 lY@ l Nlg l z @ lz l9 l9 l9 lg 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS g[T] lThe introduction of a more sensitive technique has reduced the MDL value for I t i i, j Ag-110m at less than or eaual to 5 pCi/kg. This is a continuation of the i

, , igeneral trend of decreasing Ag-110m MDL for background sanoles. Althouah radio- l 3 3 active releases for the reporting period have been well within NRC reauirements, l

, 4  ; the June Camo Canoy samples excreded the new backgrcund value by over a factor (CONT); -

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R. F. Eherts (301) 234-7941  ;

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. n LER 79-29/4T DOCKET No. 50/317;50/313 EVENT DATE 7-10-79 REPnRT DATE 7-23-79 ATTA 'HMENT CAUSE DESCRIPTION AND CORRECTIVE ACTION: (CONT) of 10. It is anticipated that actual releases of Ag-110m will fluctuate as a function of plant operational history. However, in an intensive effort to minimize the release of Ag-110m to as low as reasonably achievable, procedure modifications and personnel reinstruction regarding the operation of the radio-active waste collecting system has been initiated.

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