ML20091M333
| ML20091M333 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 01/24/1992 |
| From: | Broughton T GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| C311-92-2003, NUDOCS 9201290049 | |
| Download: ML20091M333 (2) | |
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OPU Nuclear Corpotetton
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Post Of fice Box 460 Route 441 South Middletown, Pennsylvania 17057 0191 717 944 7621 TELEX 84 2386 Writer's Direct Dial Number:
(717) 948-8005 January 24, 1992 C311-92-2003 o
U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Gentlemen:
Subject:
Three P ie Island Nuclear Station, Unit No. 1 (TMi-1)
Operating License No. DPR-50 Docket No. 50-289 Safety Evaluation for Com)11ance with 10 CFR 50.62 AnticipatedTransientWiticutScram(A1WS)(TACNoM59151)
By letter dated December 7, 1989, the Staff transmitted the subject Safety Evaluation Report (SER) by the Office of Nuclear Reactor Regulation (NRR) to GPU Nuclear (GPUN) Corporation.
This letter serves to revise GPUN's commitment with regard to SER Item No. 5 " Quality Assurance for Test, Maintenance, ard Surveillance" (Page 5), which states:
"The licensee stated that...'a standard note will be added to each applicable drawing identifying specific hardware diversity requirements.'
(in order that) ATWS equipment continue to be in compliance with the ATWS rule...*
GPUN now intends to maintain ATWS/RTS equipment diversity using a different but similar programmatic approach. 1he original commitment to add a note to each applicable drawing would not ensure the desired end result, and would be cumbersome to implement. Whereas, our new approach takes advantage of the company's computer-based programs which are required to be used for component repair, replacement, modification, and/or design changes.
The revised GPUN approach invoh es two steps.
The UFSAR will be updated to include an explanation of tre ATWS/RTS diversity requirements as applicable to any modification or design change which would be implemented in accordance with the provisions of 10 CFR 50.59. The computer-based system used to contrcl repairs / replacements will display the applicable ATWS/RTS component tag numbers identified as requiring ATWS diversity. Additionally, the Quality Control List l
(QCL) of the same computerized database will be cross-referenced to the
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j applicable section of the UfSAR..
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PDR GPU Nuclear Corpo atton is a subsidiary of Generai Putec U ees Cntporation
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Docyment Control Desk C311-92-2003 l
- Page 2 lhe computer-based engineering and design database programs containing the OCL have been updated to reflect the A1WS diversity requirements for the applicable A1WS/RTS component tag numbers and references to the UfSAR. 1ho U.SAR changes will be incorporated into the document at the next annual update of 1Hi-l's UfSAR scheduled to be submitted in July, 1992.
This change was discussed with the NRR Project Manager prior to the implementation of ATWS modifications during the 9R refueling outage.
Sincerely, M
Ilh T. G. B on Vice President and Director, IMl-1 GMG cc:
Region i Administrator THi-1 Senior Project Manager 1H1 Senior Resident Inspector t
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