ML20138L094

Provides Updated Status of Special Radiological Environ Monitoring Program Around Dresden Site.All Tritium Sampling Program Results from Second Quarter of 1996 Consistent W/ Reported Levels from First Quarter of 1996 & 1995

ML20138L094
Person / Time
Site:	Dresden
Issue date:	02/13/1997
From:	Jamila Perry COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
JSPLTR-97-0014, JSPLTR-97-14, NUDOCS 9702210049
Download: ML20138L094 (3)

Text

Commonweahh liliv>n Comp 2ny

- , Drculen Generating Station

• 65tX) North Drexlen Road a Morris, IL MISO Tel H15-942-2920 February 13,1997 JSPLTR: 97-0014 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn: Document Control Desk

Subject:

Dresden Nuclear Power Station Units 1,2, and 3 '

Updated Radiological Environmental Evaluation of Dresden Site NRC Docket Numbers50-010. 237. and 249 The purpose of this letter is to provide an updated status of the Special Radiological Environmental Monitoring Program around the Dresden site. No sample in the special environmental sampling program has yielded positive  :

results for gamma-emitting isotopes. Well DSP-149 showed an increase in i tritium concentration in August,1996. A further discussion on DSP-149 is l given in the Attachment.

All other tritium sampling program results from the third quarter of 1996 are consistent with previously reported levels for tritium from 1995 and the first and second quarters of 1996.

i If there are any questions concerning the Special Radiological Environmental Sampling Program, please contact Cliff Howland, Radiation Protection Manager, Dresden Station at (815) 942-2920, Ext. 3841.

Sincerely, j i

D t J Stephen Pe(r Site Vice President Dresden Station JSP/ lad l t

Attachment gg g))i I 9702210049 970213 PDR ADOCK 05000010 R PDR e A I!nicom Compan)

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t Attachment 1 >

s Well DSP-149 is located north of the protected area, but within the owner  :

controlled area. The well has a quarterly collection schedule. On August 1, t 1996 the well was sampled for the 3rd quarter. The sample results showed a j concentration of 8,079 247;1,126 pCi/L. This is approximately double the -  ;

normal concentration. As a result of the increased reading, the sample  ;

collection frequency was increased to once every two weeks. Once the  !

concentration returned to historically average levels, the sampling frequency  ;

was changed to monthly starting in October l i

At the present time the cause of the increase in tritium concentration is j unknown. The sample collection was performed roughly one week following  ;

a very heavy rainfall. DSP-149 will continually be sampled monthly until such  !

a time as it consistently follows the historical average, at which time it will go ,

back to a quarterly collection. l l

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8000 _ . _ _ - - - -- ._ _ _ . . . . .

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2000' __ . . . _ . ._

m z u.,a su.m s,w s .w .o. s em 4+= u,= auge u4.,a m4 .

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cc: A. Bill Beach, Regional Administrator - Rlli B. Grimes, Director of Operating Reactor Support - NRR R. Capra, Project Director lll NRR J. Stang, Project Manager - NRR S. Weiss, Director of Non-Power and Decommissioning Project Directorate - NRR S. Bajwa, Section Chief, Decommissioning Section, NRR M. Webb, Project Manager - NRR C. Vanderniet, Senior Resident inspector - Dresden R. Allen, Manager, Office of Environmental Safety - IDNS C. Settles, Dresden Resident inspector - lDNS

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