ML20011A485

LER 81-046/04T-0:on 810922,review of 810813 & 14 ETS Semiannual Samples of Cladophora Showed Co-60 & Nb-95 at Level of 10 Times Control Value.Probably Caused by Liquid Effluent Discharge & Oct 1980 Chinese Weapons Test

ML20011A485
Person / Time
Site:	Nine Mile Point
Issue date:	09/30/1981
From:	Mclaughlin K NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20011A481	List: ML20011A480 ML20011A485
References
LER-81-046-04T, LER-81-46-4T, NUDOCS 8110130472
Download: ML20011A485 (1)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 1 Io l2l l On Aucust 13 and 14. Envi ronmenta1 Technical Specificatior semi-annual samples of I l 0 l 3 ! l Cladophora, an algae were collected on the north shore of the James A. Fit: Patrick l lojal l site. The samples were found to contain Co-60 and Nb-95 in concentrations that were I

oisl l slightly higher than the Environmental Tech. Spec. reporting level of 10 times the ]

, 1O is l l contr31 value. Sampics collected at the Nine 51ile Point site showed Nb-95 detected I l o [ 7 ] [ nt exactly 10 times the control value. The samples were recounted and the same resultsl I l 0 ls l l were found. Safety consequences were minimal . I 7 8 9 8 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE . COMPONENT CODE SUBCODE SUBCODE Ioisl 8

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41 l42N ]@ lZ l@ l: l 9l 9l 9l 40 43 44 di CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i l o l l The most probabic source of Co-60 is the liquid effluent discharne from both th;. I l i l ij l Nine blile Point Unit #1 and the Fi.: Patrick plants. All discharnes have been well I g ; within the allowable Technical Specification limits. The most _ probable source of the l

[,,3l l Nb-95 is the Chinese Weapons Test of October,1980. No specific corrective action is (

g3 j4i ; contemplated by N51D-1 because liquid discharges have aircady been minimized. l 7 8 9 G3 STNuS  % POWER OTHER ST ATUS ISCO RY DISCOVERY DESCRIPTION

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LOSS OF OR DAMAGE TO FACILITY TYFE DESCRIPTION 7

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' 8110130472 810930 '8 68 80 DRADOCK05000agngg p Kev p htetaunhlin PHONE; 34 3-2110, Ext. 1206