JAFP-84-0877, Environ Radiological Monitoring Program Anomalous Measurement Rept for 840101-0621

Environ Radiological Monitoring Program Anomalous Measurement Rept for 840101-0621

ML20098E863
Person / Time
Site:	FitzPatrick
Issue date:	06/21/1984
From:	Corbin McNeil POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
JAFP-84-0877, JAFP-84-877, NUDOCS 8410020041
Download: ML20098E863 (3)

Text

y I NEW YORK POWER AUTHORITY JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET No. 50-333 Attachment to JAFP-84-0877 Page 1 of 2 The following environmental radiological monitoring sample is an anomalous measurement based on the criteria outlined in Section 5.6.2.B of the James A. FitzPatrick Environmental Technical Spec-ifications (ETS):

MOLLUSK SAMPLES Sample Location

• Date Mn-54 pCi/g (wet) Recount i

1. Offsite 06/18/84 <0.009 (LLD) <0.036 (LLD)

(Control)

2. Onsite 06/21/84 0.11 + 0.01 0.13 + 0.04 NMPP Sample Location

• Date Co-60 pCi/g (wet) Recount

1. Offsite 06/18/84 <0.008 (LLD) <0.029 (LLD)

(Control)

2. Onsite 06/21/84 0.11 + 0.01 0.15 + 0.04 NMPP

• See Technical Specification, Appendix B, for location details.

The detected levels of En-54 and Co-60 in the NMPP (onsite) mol-lusk sample was greater than 10 times the control location (off-site) results for the same sample period. The control station 10 times value is based on 10 times an LLD value (4.66 sigma).

The total release of Mn-54 and Co-60, via liquid effluent (the source of this 10 times concentration) from the James A. Fitz-Patrick Nuclear Power Plant for the period of January 1, 1984 through June 21, 1984 was 9.2E-3 and 6.5E-4 curies, respectively.

This represents 0.098 percent (Mn-54 and Co-60 combined) of the Technical Specification quarterly limit of 10 curies.

The release of liquid effluent during this period was well within the objectives outlined in the James A. FitzPatrick Nuclear Power Plant ETS Appendix B Section 2.3.A.

A possible explanation for the detection of 10 times concentra-tions of Mn-54 and Co-60 in the mollusk samples collected is the very high bioaccumulation factor (concentration factor). Due to the fact that stable manganese and cobalt are essential trace elements important to fresh water mollusk, a bioaccumulation fac-tor of up to 1,600,000 (mean value = 300,000) can exist for manganese, and a bioaccumulation factor of up to 85,000 (mean 8410020041 840621 PDR ADOCK 05000333 a eos } b q,

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m NEW YORK POWER AUTHORITY

, JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 Attachment to JAFP-84-0877 Page 2 of 2 value - 32,408) can exist for cobalt. The bioaccumulation factor will vary with the concentrations of manganese and cobalt in the lake. Because of these high concentration factors, trace quanti-ties of Mn-54 and Co-60 will be accumulated in the mollusk which are indigenous to the site.

The fresh water mollusks found in the vicinity of Nine Mile Point are not consumed by humans and are considered to be in the aqua-tic food chain to only a limited degree. Because fresh water mollusks are not considered edible, no accurate estimate of the possible dose contribution to man from their use as a food can be made. A dose estimate can be made using inflated parameters for the purpose of evaluation of possible dose contribution from the use of fresh water mollusks. Using the average individual con-sumption of seafood of 1.0 kg/yr for an adult, the dose due to ingestion would be 0.0006 mrem /yr whole body and 0.0059 mrem /yr to the gastrointestinal tract from Mn-54 and Co-60 concentrations combined. A review of Mn-54 data from 1974 through 1984 shows that a definite trend exists for the reduction of Mn-54 concen-trations in mollusk samples since 1974. The reportable concentra-tion of 0.11 pCi/g (wet) shows a decrease in Mn-54 concentration in mollusk sample results from 1983. A review of Co-60 data from 1974 through 1984 shows that a trend exists for the reduction of Co-60 concentrations in mollusk samples, with a slight increase in 1984.

It should be noted that recent NRC reporting requirements which were included in the proposed Radiological Effluent Technical Specifications, list the reporting levels of Mn-54 and Co-60 as 30 pCi/g (wet) and 10 pCi/g (wet) for fresh water fish samples, respectively. These new reporting levels are nearly two orders of magnitude higher than the level being reported here.

j James A. FitzPatrick

'Tuclear Power Plant

. PO. Box 41 Lycoming, New York 13093 315 342.3840 Corbin A. McNeill, Jr.

A NewYorkPower nestoemi u eeeeer 4# Authority September 14, 1984 JAFP-84-0877 United States Nuclear Regulatory Commission Regi7n I 631 Park Avenue King Of Prussia, PA 19406 Attention: Thomas E. Murley Regional Administrator

SUBJECT:

DOCKET NO. 50-333 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANOMALOUS MEASUREMENT REPORT Gentlemen:

We have attached an Environmental Radiological Monitoring Program Anomalous Measurement Report in accordance with Section 5.6.2(b) of the James A. FitzPatrick Environmental Technical Specifications.

If there are any questions concerning this report, please contact Mr. John A. Solini at (315) 342-3840, extension 248.

Very truly yours, by r al;ue- -

CORBIN A. McNEILL, JR.

CAM:JAS:jaa RESIDENT MANAGER Attachment (2 pp)

CC: Director, Nuclear Reactor Regulation J. P. Bayne (NYPA/WPO)

J. Blake (NYPA/WPO)

R. A. Burns (NYPA/WPO)

J. A. Gray (NYPA/WPO)

G. M. Wilverding (NYPA/WPO)

NRC Resident Inspector E. Mulcahey J. A. Solini LER/OR File (PORC Secretary)

Correspondence File Document Control Center CERTIFIED MAIL - RETURN RECEIPT REQUESTED [

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