ML20035C247
| ML20035C247 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/31/1993 |
| From: | Hernan R Office of Nuclear Reactor Regulation |
| To: | Broughton T GENERAL PUBLIC UTILITIES CORP. |
| Shared Package | |
| ML20035C249 | List: |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 GL-82-33, TAC-M51361, NUDOCS 9304060387 | |
| Download: ML20035C247 (2) | |
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March 31, 1993 i
Docket No. 50-289 DISTRIBUTION:
- Docket File NRC & Local PDRs
' AHa'nsen JHannon Mr. T. Gary Broughton, Vice President PD I-4 Plant SVarga and Director - THI-I JCalvo SNorris i
GPU Nuclear Corporation RHernan 0GC Post Office Box 480 ACRS(10)
IAhmed i
Middletown, Pennsylvania 17057 JFRogge, RI j
Dear Mr. Broughton:
SUBJECT:
THREE MILE ISLAND UNIT 1 - INSTRUMENTATION TO FOLLOW THE COURSE OF AN ACCIDENT REQUIRED BY REGULATORY GUIDE 1.97 (TAC NO. M51361) r Section 6.2 of Generic Letter 82-33 requested licensees to provide a report on their implementation of Regulatory Guide 1.97,. Revision 2, including methods i
for complying with the Commission's regulations and supporting technical justification for any proposed alternatives or deviations. A large number of 3
exception requests were received from PWR licensees asking that the environmental qualification requirement for accumulator level and pressure i
monitoring instrumentation be relaxed from Category 2 to Category 3, which would allow commercial grade instruments it be used. Prior to 1987 these requests were denied by the staff. Since then, these exceptions have been considered as an open item until a generic resolution was found.
The staff has now reviewed the bases for these exceptions and has concluded that no operator action is based on this post-accident instrumentation and that it does not perform a safety function.
Since this instrumentation does not perform any post-accident safety function, its qualification requirements can be reduced to Category 3.
Therefore, in terms of Regulatory Guide 1.97 compliance, environmental qualification of these instruments is no longer -
considered to be an open item at Three Mile Island, Unit 1.
A copy of the Safety Evaluation is enclosed.
Should you have any questions, pler.se call me at (301) 504-2010.
l Sincerely, Original signed by Ronald W. Hernan, Sr. Project Manager l
Project Directorate 1-4 Division of Reactor Projects - I/II
Enclosure:
Office of Nuclear Reactor Regulation Safety Evaluation cc w/ enclosure:
See next page i
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Mr. T. Gary Broughton Three Mile Island Nuclear Station, GPU Nuclear Corporation Unit No. I t
cc:
t Michael Ross Francis I. Young 0&M Director, TMI-l Senior Resident Inspector (TMI-1)
GPU Nuclear Corporation U.S. Nuclear Regulatory Commission j
Post Office Box 4B0 Post Office Box 311 Middletown, Pennsylvania 17057 Middletown, Pennsylvania 17057 Michael Laggart Regional Administrator, Region I Manager, Licensing.
U.S. Nuclear Regulatory Commission GPU Nuclear Corporation 475 Allendale Road 100 Interpace Parkway King of Prussia, Pennsylvania 19406 Parsippany, New Jersey 07054 Robert B. Borsum Robert E. Rogan B&W Nuclear Techrologies THI Licensing Director Suite 525 GPU Nuclear Corporation 1700 Rockville Pike Post Office Box 480 Rockville, Maryland 20852 Middletown, Pennsylvania 17057 Ernest L. Blake, Jr., Esquire William Dornsife, Acting Diractor Shaw, Pittman, Potts & Trowbridge Bureau of Radiation Protection 2300 N Street, NW.
Pennsylvania Department of Washington, DC 20037 Environmental Resources Post Office Box 2063 Chairman Harrisburg, Pennsylvania 17120 Board of County Commissioners of Dauphin County i
Dauphin County Courthouse Harrisburg, Pennsylvania 17120 Chairman Board of Supervisors of Londonderry Township R.D. #1, Geyers Church Road Middletown, Pennsylvania 17057 t
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