ML20010G331

LER 81-064/04T-0:on 810824,following Environ Radiological Sampling,Anomalous Results in Gammarus & Periphyton Samples Exceeded Ets.Investigation of Liquid Effluents Released Underway.Findings Will Be Included in 1981 Rept

ML20010G331
Person / Time
Site:	FitzPatrick
Issue date:	09/04/1981
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20010G325	List: ML20010G324 ML20010G331
References
LER-81-064-04T, LER-81-64-4T, NUDOCS 8109150594
Download: ML20010G331 (3)

Text

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EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h 101211 Environmental Radioloalcal samolino resulted in anomalous results in nammarne l lo l3 { l and periphyton samples requiring a report to satisfy environmental technical 1 lotall specification 5.6.7.b. No significant hazard existed. I t 10151 1 See attachment for details. I lo lo l l I jol7)i  !

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POWER AllTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 81 - 064/04T-0 Page 1 of 2 The following Environmental Radlological Monitoring samples are-anamalous measurements based on criteria outlined in the James A. FitzPatrick Nuclear Power Plant Technical Specifications, Appendix B, Paragraph 5.6.2.b:

PERIPHYTON SAMPLES pCi/g (wet)

ISOTOPE 'ONTROL *(Off-Site) NMPP *(On-Site)

SAMPLE SAMPLE RECOUNT (7/ 8/81) (7/ 6/81)

Ce-141 0.61 1 0.15 0.75 1 0.15 0.80 1 0.19 Zr-95 0.54 1 0.05 0.88 1 0.09 0.84 1 0.086 Nd-95 1.6 1 0.16 1.8 1 0.18 2.2 1 0.22 Cs-134 < 0.043 0.54 1 0.05 0.51 1 0.051 Mn-54 < 0.033 0.16 1 0.03 0.16 1 0.034 co-60 < 0.037 0.19 1 0.02 0.19 1 0.019 Cs-137 0.14 1 0.03 4.0 1 0.4 4.1 1 0.41

• SEE TECHNICAL SPECIFICATIONS, APPENDIX B, FOR SAMPLE LOCATIONS.

The activity level of Cs-134 and Cs-137 in the NMPP sample was greater than ten times the control station value for the same sample period. As noted above, the on-site (NMPP) sample was recounted to verify the measured levels of Cs-134 and Cs-137 Also detected in the NMPP sample were lesser amounts of Ce-141, Zr-95, Nd-95, Mn-54, and Cs-60. The Ce-141, Zr-95 and Nd-95 are the result of global fallout from recent atmospheric nuclear tests conducted by the People's Republic of China. Each of these fallout nuclides was also detected in the control station sample. The detected concentrations of Cs-134 and Cs-137 are related to recent liquid effluents discharged from the Nine Mile Point Site. An investigation of liquid effluents released from the site is underway and the findings of the study will be reported in the 1981 Radiological Environmental Surveillance Report.

There is no expected dose to man as a result of the radioactivity detected in the periphyton samples as periphyton is not directly in the human food chain. A more direct calculatior, of dose to man can be made based on possible levels of Cs-134 and Cs-137 found in fish samples collected if such activity is present. Such calculations will be included in the 1981 Radiological Environmental Survel11ance Report, as fish sampling is not yet completed for the 1981 sampling season.

A second series of Periphyton Samples was collected during the week of 8/ 9/81.

POWER AUTH0hlTY OF THE STATE OF NEW YOT.K JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 81-064/04T-0 Page 2 of 2 The second Environmental sample media, with radiological analytical results containing anomalous measurements, wss Gammarus:

GAMMARUS SAh/LES pCi/g (wet)

SAMPLE LOCATION

• SAMPLE DATE DETECTED ACTIVITY Cs-137 Cs-134 Co-60

1) Control Oswego Harbor 7/ 9/81 < 0.14 < 0.11 < 0.16

2) On-site 7/ 9/81 1.4 1 0.3 0.22 1 0.1 0.40 1 0.3 RECOUNT 1.5 1 0.3 0.14 1 0.1 0.59 1 0.2

3) On-site JAF 7/ 9/81 8.0 1 0.8 1.3 1 0.3 2.4 1 0.5 RECOUNT 9.2 1 0.9 1.1 1 0.3 2.8 1 0.5

• SEE TECHNICAL SPECIFICATIONS, APPENDIX B, FOR SAMPLE LOCATIONS.

The activity level os Cs-137 in the NMPP on-site Gammarus sample and the activity level of Cs-137, Cs-134 and Co-60 in the JAF on-site Gammarus sample were greater than ten times the control station value for the same sample period.

As noted above the on-site samples were recounted to verify the measured levels of Cs-137, Cs-134 and Co-60.

The detected levels of Cs-137, Cs-134 and co-60 are related to recent liquid effluents discharged from the Nine Mile Point Site. An investigation of liquid effluent discharges from the site is underway and the findings of the study will be reported in the 1981 Radiological Environmental Surveillance Report.

. There is no expected dose to man as a re sult of radioactivity dete.ted in the Gammarus samples, as Gammarus is not directly in the human food chain. A more di rect dose to man can be made based on possible levels of Cs-137, Cs-134 and Co-60 found in fish samples collected if such activity is present. Such

calculations will be included in the 1981 Radiological Environmental Surveillance Report, as fish sampling is not yet completed for the 1981 sampling season.

A second series of Gammarus samples was collected during the week of 8/16/81.

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