ML20028H045
| ML20028H045 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 09/27/1990 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| C311-90-2119, NUDOCS 9010050284 | |
| Download: ML20028H045 (2) | |
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- GPU Nuclear Corporation
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gu One Upper Pond Road.
i Parsippany, New Jersey 07054 201 316-7000-l TELEX 136-482.
Writer's Direct Dial Number.
Septerther 27, 1990 C311-90-2119 U. S. Nuclear Regulatory Commission Attn Document Control Desk
-Washington,-DC-20555 Gentlemen:
i Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 Individual Plant Examination (IPE) Schedule This letter is a follow-up to our telephone conversation of August 21, 1990-providing additional information to support a schedule change for.the TMI-1
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IPE.
GPUN letter dated October 31, 1989 provided the plan and schedule for completing the.THI-1 IPE.
It was recognized that the original schedule o
commitment of September 1, 1992 contained little or no margin for delays, but I
that'this schedule would be maintained consistent with our Long Range Plan Integrated Schedule.
Subsequently, GPUN letter dated May 4, 1990, which revised the THI-l Integrated Schedule Listing, identified that completion of the IPE was being deferred nine
-(9) months to June 1, 1993. This deferral was based on internal budget and resource constraints and the recognition that priority should'be given to the Oyster Creek IPE which is more likely to produce new information useful for p
_possible risk-reduction than revisions to the existing THI-1 PRA.-
It is less
(~i likely that significant new vulnerabilities will be identified from the ThI-1 q
PRA update.
r Additionally, it uhould be noted that the existing TMI-1 PRA is being. expanded to a Level II PRA-as part.of the IPE effort, and the Oyster Creek IPE will also consist'of'a Level II PRA.
A Level II PRA is currently beyond NRC requirements l
l-l for the IPE process. CPUN is working with the B&W owner's Group to develop a I
generic containment response assessment, previously encouraged by NRC.
f However, significant interface is required to coordinate Level I Plant Damage State definitions and assignments with the generic containment assessment.
The same'PRA contractor (Pickard Lowe & Garrick) is being utilized for,the l
Oyster Creek PRA and TMI-1 Level I PRA update.
In accordance with NRC IPE l
guidance, GPUN is attempting to maximize the participation of in-house i
l 9010'05d284 900927 L
PDR ADOCK 05000289 l'
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GPU Nuclear Corporation is a subsidiary of General Public Utilities Corporation
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a personnel for the IPE effort.
As a result, the IPE workload is currently split approximately 50/50 between ia-house persent.el and centractor personnel. The resource requirements for the TMI-l PRA. update are extencive, as the PRA must reflect.the current plant design and operation. The existing PF\\ reflects the plant design as of lata 1985/early 1986. GPUN also intends to address the fit.al positions and recommendations of NRC's review of the existing THI-1 PRA, if they are issued by the etaff in a timely mannor.
Resources have beon reallocated to support completion and submittal of the-THI-l IPE by June 1, 1993, and we are proceeding based on this schedule.
Sincerely, H
D.
u ill Vice President and Director, TMI-1 HDH/DJD/ pip cc R. Hernan - USNRC T. Martin - USNRC, Region I J. Stolz - USNRC F. Young - USNRC, THI-l i
1 l
C3112119
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