NUREG/CR-5055, Informs of 970422 Telcon Re Plant,Unit 1 & 2 Applicability of NUREG/CR-5055, Atmospheric Diffusion for Control Room Habitability Assessments. Ltrs from Pnl & 0823 Encl

Informs of 970422 Telcon Re Plant,Unit 1 & 2 Applicability of NUREG/CR-5055, Atmospheric Diffusion for Control Room Habitability Assessments. Ltrs from Pnl & 0823 Encl

ML20141L919
Person / Time
Site:	Point Beach
Issue date:	05/30/1997
From:	Gundrum L NRC (Affiliation Not Assigned)
To:	Grigg R WISCONSIN ELECTRIC POWER CO.
Shared Package
ML20141D306	List: ML20141D301 ML20141D314 ML20141D327 NUREG/CR-5055, Informs of 970422 Telcon Re Plant,Unit 1 & 2 Applicability of NUREG/CR-5055, Atmospheric Diffusion for Control Room Habitability Assessments. Ltrs from Pnl & 0823 Encl
References
RTR-NUREG-CR-5055 NUDOCS 9706030170
Download: ML20141L919 (4)

Text

. _ _ _ _ _ . _ _____ _ _ _._ . . . . . - . - _ . . ~ . . . . _ . _. - . _ - . _ . - ,

p uer.,

yy o,4 UNITED STATES flk j

NUCLEAR REGULATORY COMMISSION g

, WASNINGTON, D.C. enmaa mant g.g'/'

v k May 30, 1997 Mr. Richard R. Grigg Chief Nuclear Officer Wisconsin Electric Power Company l 231 West Michigan Street, Room P379

! Milwaukee, WI 53201 f .

SUBJECT:

POINT BEACH NUCLEAR PLANT, UNIT NOS.1 AND 2 -

APPLICABILITY OF NUREG/CR-5055, " ATMOSPHERIC DIFFUSION FOR CONTROL ROOM HABITABILITY ASSESSMENTS" l

Dear Mr. Grigg:

On April 22, .1997, the NRC staff conducted a teleconference with Wisconsin Electric Power Company (WEPCO) to discuss the meteorological data and atmospheric dispersion assumptions under consideration for control room habitability assessments at the Point Beach plant. Current regulatory guidance for i performing control room habitability assessments is outlined in Standard Review i Plan 6.4 of NUREG-0800. WEPCO was aware of work performed for the NRC by l Pacific Northwest National Laboratory entitled, " Atmospheric Diffusion for Control l

l Room Habitability Assessment," NUREG/CR-5055 (1988). During the i i teleconference, the staff committed to publicly release the results of more recent activities that supported the staff determination that the methods proposed in NUREG/CR-5055 should not be used for current licensing applications. I 1

The staff undertook the work effort that resulted in NUREG/CR-5055 to determine whether improvements could be made to the longstanding reference methods, referred to as the Murphy-Campe procedure (published in the 13th Air Cleaning  !

Conference in 1974), of the SRP. The staff has taken no action to date to generically endorse any alternative methods from the procedures outlined in the SRP. Additional work on the new methods led to a peer review of the work outlined in NUREG/CR-5055, and in a subsequent iteration of the model published in Atmospheric Envirenment (Ramsdell,1990), which led to a critique and author's response (1992).'The two enclosures (letters dated May 20 and August 23,1994) j provide the results of the peer review and a discussion of the disposition of the i

review and proposed changes to the new methods. Comments are being incorporated into another document, NUREG/CR-6331, Revision 1, " Atmospheric

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l 9706030170 970530

~ MC N.E CENTER COPY9 ptA i j PDR ADOCK 05000266 1 P PDR

. .- . _ = -. .. -- -.- - . - _ . . . . . . - . - - _ . _ . . . . - _ -

I l

Mr. Grigg ' Belative Concentrations in Building Wakes" (ARCON), that is planned for publication in the near future.

Sincerely, ORIGINAL SIGNED BY l

l Linda L. Gundrum, Project Manager l Project Directorate 111-1 1 l Division of Reactor Projects - Ill/lV .

Office of Nuclear Reactor Regulation l Docket Nos. 50-266 '

and 50-301

Enclosures:

1. Letter from PNL to NRC, dated May 20,1994 1 2. Letter from PNL to NRC, dated August 23,1994 cc w/encls: See next page. l DISTRIBUTION:

Docket File PUBLIC PDill-1 Reading J. Roe M. Slosson OGC C. L. Miller R. Emch  !

L. Brown ACRS J. McCormick-Barger, Rill DOCUMENT NAME: G:\WPDOCS\PTBEACH\PTB5055.LTR Ta ,1ceive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure *E* = Copy with attachment / enclosure *N" = No copy 0FFICE PM:PD31 E LA:PD31 ,E BC:PERB 6 OGC C D:PD31 g/7 NAME LGundrum:dhV W f CJamerson Of CLMiller ( 6 MP T/et/ AU JHannorifff"

DATE 5/Aq/97 5/49 /97 4 5/9 9 /97 5/y)/97 5/w /97 j OFF"CIAL RECORD COPY t

l l

~ s Mr. Richard R. Grigg Point Beach Nuclear Plant Wisconsin Electric Power Company Unit Nos. I and 2 cc:

Ernest L. Blake, Jr.

Shaw, Pittman, Potts & Trowbridge 2300 N Street, N.W.

Washington, DC 20037 Mr. Scott A. Patulski Vice President Point Beach Nuclear Plant

• Wisconsin Electric Power Company 6610 Nuclear Road Two Rivers, Wisconsin 54241 Mr. Ken Duveneck Town Chairman Town of Two Creeks 13017 State Highway 42 Mishicot, Wisconsin 54228 Chairman Public Service Commission of Wisconsin P.O. Box 7854 Madison, Wisconsin 53707-7854 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Resident Inspector's Office U.S. Nuclear Regulatory Commission 6612 Nuclear Road Two Rivers, Wisconsin 54241 Ms. Sarah Jenkins Electric Division Public Service Commission of Wisconsin P.O. Box 7854 Madison, Wisconsin 53707-7854 MedlM7 1

i

.\ .

QBattelle Pacific Northwest Laboratories j Bartelle Bowlevard P.O.8c 999 kiehland, Washinston 99M2 Telephone (509J 376-8626 August 23, 1994 l

A. H. Huber '

USEPA/ AREAL MD-56 Research Trian le , ark, NC 27711

DearEl uber:

Attached is the draft letter report to Jay Lee that describes the revisions to my 1990 building wake diffusion model in response to the peer review panel recommendations.

low and high wind speed conditions.The revisions explicitly treat increased diffusi In addition to covering the revisions to the model, the letter report covers the peer review panel concerns related to the use of a Gaussian-based diffusion model for estimating concentrations at receptors on and adjacent to building surfaces. ,

The Nuclear Regulatory Commission staff would like to use the letter report to support a change in its regulatory' position related to control room habitability October. for submission to the Advisory Committee on Reactor Safeguards in Please review the_ letter report to ensure that it adequately dispositions all of your concerns and provide written confirmation that your concerns have been addressed. In order to eake any final revisions to the model that are necessary prior to the meeting, I need to have the confirmations and any comments by September 12, 1994.

Sinc rely, James V. Ramsdell Senior Research Scientist Multimedia Exposure Assessment Group EARTH AND ENVIRONME<TAL SCIENCES CENTER JVR/1g -

Attachment cc: J. Fairebent F.A. Gifford

. J.Y. Lee D.J. Wilson Peer Group i

!