ML20083F515

Nonroutine Rept:One Aug 1983 Cladophora (Algae) Sample Showed Co-60 Concentration Slightly Greater than 10 Times Control Result.Caused by Liquid Effluents at Site.No Corrective Actions Required

ML20083F515
Person / Time
Site:	Nine Mile Point
Issue date:	12/07/1983
From:	Lempges T NIAGARA MOHAWK POWER CORP.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NMP-7552, NUDOCS 8401030121
Download: ML20083F515 (2)

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. . , ,m NMP- 7552 NIAGARA MOHAWK POWER CORPORATION NI AGAR A MOHAWK 300 E FtlE BOULEV A RD. WEST SYRACUSE,N Y.13202 December 7, 1983 Dr. Tliomas E. Murtey Reyionat Administrator UnLted States Nuctcar Regulatory Commission Regioot I 631 Park Avenue King of Prussla, Pennsylvania 19406 Re: Docket No. 50-220

Dear Dr. Murtcy,

In accordance teltli Nine t. lite Po. int Nucicar Station Urtit 1 Teclinical Specificationss, tee licreby submit tite folloteing 30 day Nosttoutine Radio-Logical Envitonmental Operating Report. TItis report is subm<.tted in accordance seitli tite required content of section 4.6.2 of tiie Appendix B Teclutical Specifications.

Vety L1uty yours, W% ,yo y Tliomas E. Lempges Vice President Nuclear Generation TEL/HJF/jm cc: Director, Office of NRR (1 copy)

Enclosure 8401030121 831207 PDR ADOCK 03000220 PDR S

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g* NONROUTINE REPORT Nine Mile Point Nuclear Station Unit #1 Docket No. 50-220 December 7, 1983 INTRODUCTION:

This Nonroutine Radiological Environmental Operating Report is submitted in accordance with section 4.6.2.b of the Nine Mile Point Nuclear Station Unit 1 Technical Specifications, Appendix B (Environ-mental Technical Specification). Section 4.6.2.b indicates that "if a confirmed measured level of radioactivity in any environmental medium exceeds ten times the control value, a written report shall be submitted".

DESCRIPTION:

Samples of Cladophora (algae) were collected and analyzed in accordance with Appendix B specification 3.2.n and Tabic 3.2-1. One of the August 1983 samples showed Co-60 at a concentration of slightly greater than ten times the control result.

CAUSE:

Co-60 in Cladophora is a result of liquid effluents at the site.

All liquid effluent discharges at the site were well within Technical Specification limits during 1983 and previous to 1983.

The reason that Co-60 was detected in Cladophora during August is that fresh water algae has a great bioaccumulation factor.

CORRECTIVE ACTION (S):

No corrective action is anticipated for the following reasons:

1. Site liquid effluents are well within Technical Specification limits.

2. Samples of Cladophora, as an environmental indicator medium, are significant only in a qualitative sense because it is not consumed by humans.

3. There are no dose consequences to members of the public since Cladophora is not an edible food product. A hypothetical calculated dose, assuming Cladophora is an edible food product and using Regulatory Guide 1.109 methodology for maximum exposed individual, shows that the associated annual dose would be 0.03 mrem per year whole body and G.29 mrem per year maximum exposed organ. This dose is minimal when compared to NUREG-0472, Rev. 3 exposure guidelines of 3 mrem per year to the total body j and 10 mrem per year to any organ.

A summary of this reportable occurrence will also be included in the 1983 Annual Environmental Operating Report.

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