ML20006A712

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Forwards Revised Pages to 1987 Radiological Environ Monitoring Rept
ML20006A712
Person / Time
Site: Clinton Constellation icon.png
Issue date: 01/10/1990
From: Holtzscher D
ILLINOIS POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20006A713 List:
References
U-601581, NUDOCS 9001300082
Download: ML20006A712 (2)


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llLINDIS POWER COMPANY ' iP CLINToN POWER STATION. P.O. BOX 678. CLINTON, ILLINots 61727 j , 1
l. $ ,

s January 10, 1990 l- i I

Docket No. 50-461 Nuclear Regulatory Commission

-Document Control Desk.

Washington, D.C 20555

Subject:

Clinton Power Station Revisions to 1987 Annual Radiological Environmental Monitoring Reoort

Dear Sir:

The 1987 Radiological Enviranmental Monitoring Report,-submitted'-

under Illinois Power Company -(IP) cover. letter '6-60ll77 of April; 29,1 1988, has been found to contain several minor errors.: The corrections-L are provided in Attachment 1 and revised'pages for yourl reports are-b provided in Attachment 2.

Sincerely yours,

%x4%D. L..Holtzscher.

. Acting Manager -

l Licensing and Safety _

SFB/krm

, Attachments - 2 i cc: Regional Administrator, Region III, USNRC NRC Clinton Licensing Project Manager NRC Resident Office 2

Illinois Department of Nuclear Safety.

L 9001300082 900110 '

{DR ADOCK 05000461 i PDC hk

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Attichmsnt l'

- to U-601581 I

Revisions to the 1987 Radiological Environmental Monitorine Report As a result of a recent Quality Assurance audit of the Radiological Environmental Monitoring (REM) Program, several changes need to be made-to the 1987 annual REM report. None of the changes significantly alter the conclusions brought forward in the report. The changes are summarized.below and revised pages with revision bars.are attached.

1. Page 20, Table 3, Cobalt - 60 Liquid Effluents fCi) has been revised  ;

from "9.73E-5" to the correct value of "7.75E 5. This'was a- ,

! tvoorrachical error. The corrected value is lower and, therefore, would '

result in a smaller dose to the general public.

2. Page 32, Table 4, Bottom Sediment, K-40, Location with the Highest-  !

Annual Mean, has been revised from "50 miles 5" to the correct location of "50 miles S". This was a tvoograohical error and has no impact on the results.

3. Page 33, Table 4, Bottom Sediment, Pb-214', Location with the highest ,

Annual Mean, has been revised from."5.0 mile ENE" to "5.0 miles ENE". 'y This was a tvoorrachical error and has no impact on the results.  !

4. Page A-6, Table A-1, CL-50 TLD location, has been revised from "3.2 miles WNN" to the correct location of "3,2 miles WNW". 'This was a tvooerachical error and has no impact on the results.
5. Page E-2, Quality Assurance Program, 1987 EPA crosscheck programiresults'  ;

were interoreted different1v in 1987 than they are currently. In 1987, i EPA crosscheck results were considered acceptable if,the range of the  ;

sample result (sample result plus and minus two standard deviations) overlapped the control limit. The current-methodology for evaluating crosscheck results is to compare only'the sample result (disregard the standard deviation) to the contro1' limit. An example ir given below: ,

l Result Control Limit 10.0i2.0 11.5 - 13.5 In the past, this result was considered to be acceptable (within the control limit). Using the current methodology, this result would have fallen outside the control limit. 1 Upon review of the 1987 crosscheck results using the surrent i methodology, three additional crosscheck results were found to be '

outside of the control limits. This revision discusses the crosscheck results and the reasons they were outside.of the control limits. This revision has negligible impact on the results of the report. j

6. Page G-3 through G-6', Table G-1 Wind speed, revised wind speed sub-header from "24" to ">24". This was a tvoorrachical error and has no-impact on the results. l U