05000333/LER-1980-076-04, /04T-0:on 801002,environ Radiological Monitoring Revealed Activity in Periphyton Organisms Near Site to Be Greater than Ten Times Control Sample for Co-60.Evaluation Does Not Indicate Significant Environ Impact

/04T-0:on 801002,environ Radiological Monitoring Revealed Activity in Periphyton Organisms Near Site to Be Greater than Ten Times Control Sample for Co-60.Evaluation Does Not Indicate Significant Environ Impact

ML19340B226
Person / Time
Site:	FitzPatrick
Issue date:	10/15/1980
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
ML19340B219	List: 05000333/LER-1980-076, Forwards LER 80-076/04T-0 05000333/LER-1980-076-04, /04T-0:on 801002,environ Radiological Monitoring Revealed Activity in Periphyton Organisms Near Site to Be Greater than Ten Times Control Sample for Co-60.Evaluation Does Not Indicate Significant Environ Impact
References
LER-80-076-04T, LER-80-76-4T, NUDOCS 8010210677
Download: ML19340B226 (3)

LER-1980-076, /04T-0:on 801002,environ Radiological Monitoring Revealed Activity in Periphyton Organisms Near Site to Be Greater than Ten Times Control Sample for Co-60.Evaluation Does Not Indicate Significant Environ Impact

Event date:
Report date:
3331980076R04 - NRC Website

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- POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 80- 076/04TO Page 1 of 2

The following Environmental Radiological Monitoring sample -is an anomalous measurement based on criteria outlined in the James A. FitzPatrick Nuclear Power Plant Technical Specifications, Eppendix B,. Paragraph 5.6.2.b:

Periphyton Samples pCi/gm (Wet)

Sample Location

• Sample Date' Co-60 Activity

~ 1.

Control Oswego Harbor 8/ 4/80

<0.0078 Recount (9/24/80) 8/ 4/80

<0.0095 2.- On-Site NMPP 8/ 4/80 0.038+0.0084

- 3.

On-Site JAF 8/ 4/80 0.1310.013 Recount (9/24/80) 8/ 4/80 0.15 0.015-

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• See Technical-Specifications, Appendix B for location details.

The activity level of Co-60 in the JAF on-site sample is greater than 10 times the control ~ station value-for the same sample period based on sample reanalysis.'

The JAF. samples were collected off-shore from the power plant in approximately one to three feet of water. The sample location was 1,000 feet south (in. shore) of the discharge structure and.was located outside the near field dilution area (5 dilutions).

The total liquid release of Co-60 for the period of January 1, 1980 to August 4,'1980 was 0.63'C1..An' integrated release of this quantity of Co-60 should not' produce a significant environmental impact.

The

- release of Co-60 during this' period was well within the dischargerlimits required by the plant's Technical Specifications,-Appendix B.

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.o POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 80- 076/04T-0 Page 2 of 2 A dose calculation from activity found in JAF periphyton sample is difficult as these organisms are not in the human food chain.

For the purpose of illustration a dose calculation (based on the U.S. Nuclear Regulatory Commission Regulatory Guide 1.109, Revision 1, dated October 19, 1979) cza be made using unrealistic assumptions.

If an adult were to consume 04 kg/yr of periphyton (an amount equal to the maximum annual adult consumption of leafy vegetables) the dose from the Co-60 concentration of 0.15 pCi/g (wet) would be equal to 0.045 mrem to the whole body and 0.39 mrem to the GI tract (critical organ).

The signi-ficance of these greatly over estimated doses to man are very low with respect to natural background radiation.

Because periphyton samples are near the base of some aquatic food chains, a review of the analytical results for other aquatic samples taken.in the vicinity of the site during this same time period can be made. Mollusk samples collected on June 12, 1980 showed no detectable Co-60 activity.

In addition, no detectable levels of Co-60 were found in fieh samples collected during May, 1980 which would indicate that the activity found in the JAF periphyton sample is not being transferred and reconcentrated in the upper levels of the aquatic food chain.

An examination and~ analysis of similar sample data (December, 1974 to present) shows a decreasing trend of sample activity in the periphyton samples taken in the vicinity of Nine Mile Point.

NOTE:

LER 78-068,78-072, 78-077,78-086, 79-114 and 80-064 are related events.

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