ML20155G319
| ML20155G319 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/06/1988 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR C311-88-2134, GL-87-02, GL-87-2, NUDOCS 8810140201 | |
| Download: ML20155G319 (2) | |
Text
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.o GPU Nuclear Corpo ation
. N lger One Upper Pond Road swMu Parsippany, New Jersey 07054 201 316-7000 TELEX 136 482 Writer's Direct Dial Nurrbtr:
October 6,1988 C311-88-2134 U.S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, D.C. 20555 Gentlemen:
Three Mile Island Nuclear Generating Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 Response to Generic SER on SQUG Resolution of Unresolved Safety Issue A-46 On July 29, 1988, the NRC Staff issued a Safety Evaluation Report (SER) on Revision 0 of the Generic Implementation Procedure (GIP) for Seismic Verification of Nuclear Plant Equipment developed by the Seismic Qualification Uttitty Group (SQUG).
The letter to SQUG enclosing the SER requests that SQUG member utilities provide to the NRC, within 60 days, a schedule for implementing the GIP.
By letter dated August 19, 1988 to Mr. Shao, SQUG clarified that the sixty days would expire on October 7, 1988, 1.11s letter responds to the NRC request for our plant-specific setsmic verification schedule for THI-1, consistent with the requirements of Generic Letter 87-02, "Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, Unresolved Safety Issue (US!) A-46."
As members of SQUG and the Electric Power Research Institute (EPRI), we have supported the many efforts on which the GIP is based.
The SER endorses the methodology and criteria embodied in Revision 0 of the GIP, subject to satisfactory resolution of a number of open issues and NRC comments. Action by SQUG and its contractors is underway to resolve the identified open issues and comments in accordance with the SQUG schedule presented at the August 10-11, 1988 neeting with the NRC staff and included with the SQUG letter to Mr. L. Shao dated August 19, 1988.
This schedule prujects Completion of Revision 2 of the GIP in Spring, 1989, contingent upon SQUG and NRC agreement on the resolution of the various open issues.
Revision 2 of the GIP is the verston which is scheduled to contain all of the information needed to implement the USI A-46 generic letter at SQUG member plants.
The final NRC SER Supplement on Revision 2 of the GIP is anticipated by mid-1989.
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GPUN plans for implementation of the GIP at THI-l are necessarily preliminary given the current status of and schedule for completion of Revision 2 of the GIP and HRC's SER Supplement on the revision.
However, it is our current plan to resolve USI A-46 for THI-1 by implementation of the generic criteria and methodology included in Revision 0 of the GIP, as clarified by the SQUG responses tn the NRC SER in SQUG letter to Mr. L. Shao dated September 22, 1988.
Assuming no major changes in the workscope currently env151oned, which is described in Revision 0 of the GIP and the criteria to be added for cable raceways, tanks, heat exchangers, and relays, we plan to perform the seismic verification plant walkdown required by the GIP by the conclusion of the second refueling outage after receipt of the final SER Supplement and resolution of all open SER issues.
Provided the final NRC SER Supplement with no open items is issued by the second quarter of 1989, then the plant walkdown at THI-l is expected to be completed during our 9R outage which is projected to be completed in December, 1991.
Upon completion of the plant walkdown, the results of the walkdown and a proposed schedule for complete resolution including corrective modifications or replacements, if required, will be provided in the TMI-l A-46 summary report submittal.
Identification of safe shutdown equipment, gathering of necessary plant-specific data and training of our walkdown team members will be initiated prior to this outage.
Our current implementation schedule, as described above, is based on the "SQUG Commitments" identified in each section of the GIP.
In addition, our implementation ar.a schedule commitment is contingent upon our current understanding of the GlP.
If the scope of the final revision of the GIP or the cost and effort required to implement it at THI-l changes significantly from the current scope and cost estimates, we will reevaluate our commitments.
In view of the uncertainties in the requirements and schedule for resolution of these related issues, we reserve the right to revise the implementation schedule for US! A-46 at THI-1.
This schedular commitment is consistent with our Integrated Schedule and any Changes thereto will be per our Long Range Planning Program.
Sincerely.
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VICe President & Director THI-l HDH/jd cc:
J. Stolz, USNRC R. Hernan, USNRC W. Russell, USNRC, Region !
R. Conte, USNRC, THI-1 N. Smith, SQUG Chairman 7289f/0169f O I r>.
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