ML20206B403

Forwards Safety Evaluation Supporting Util 850416 Request for Deletion of Constraint of 20-ft Square of Modified Penetrations Between Reactor & Auxiliary/Fuel Handling Bldgs.Expanding of Limit to 40-ft Square Acceptable

ML20206B403
Person / Time
Site:	Three Mile Island
Issue date:	04/03/1987
From:	Travers W Office of Nuclear Reactor Regulation
To:	Standerfer F GENERAL PUBLIC UTILITIES CORP.
Shared Package
ML20206B407	List: ML20206B403 ML20206B413
References
CON-NRC-TMI-87-012, CON-NRC-TMI-87-12 NUDOCS 8704090139
Download: ML20206B403 (1)

Text

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."4 DISTRIBUTION:

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? DCS FMiraglia W*I NRC/TMI 87-012 WDTravers April 3, 1987 w MTMasnik M~ Docket No. ,0-32 LChandler JAThomas

'l LHThonus Mr. F. R. Standerfer CCowgill 4 . -Vice President / Director, THI-2 TMoslak

. GPU Kuclear Corporation I&E lb 'P. O. Box 480 ACRS 1 Middistown,PA 17057 M-Town Office 4 "

Subject:

Seismic Design Criteria for Modified Containment Penetrations Y

The NRC staff has reviewed your request (reference 1) for deletion of the i

constraint of 20 ft.2 of modified penetrations between the reactor building and auxiliary / fuel handling buildings given in our November 5,1984 letter M (reference 4). In our previous analyses the penetrations to the auxiliary and

,3 fuel handling buildings were not the limiting case. As discussed in the E

,' enclosure, if a total of 40 ft.2 of these penetrations were modified the offsite dose consequences of the modeled accident would remain a small portion of the limits in 10 CFR 100. Thus the staff concurs with expanding the limit to 40 ft.a, -

+

Any additional modifications for which the potential offsite dose consequences could be estimated to exceed a small portion of the 10 CFR 100 limits 3 (references 5 and 6), however, will be evaluated on a case by case basis (reference 2). -The staff will consider the nature of the modification, the

,o duration of the modification, and any restriction of activities while the-modificaticn is in place in addition to the potential offsite dose s

consequences.

Sincerely, once4AL spS E 7 venom o. Travas William D. Travers, Director TMI-2 Cleanup Project Directorate

Enclosure:

As stated cc: T. F. Deceitt e7o4o90139 8704o3 R. E. Rogan PDR ADOCK 05000320 S. Levin P PDR

1. J. E. Frew J. J. Byrne A. W. Miller Service Distribution List (seeattached)

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NXC FORM 318 (10 80) NRCM 0240 OFFICIAL RECORD COPY