ML20003D780

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Forwards Response to NRC 810109 Ltr Re Asymmetric LOCA Loads.Technical Review Meeting Requested for 810402-03 to Resolve Approx 60 Questions by Cross Referencing Docketed Info
ML20003D780
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 03/26/1981
From: Hukill H
METROPOLITAN EDISON CO.
To: Reid R
Office of Nuclear Reactor Regulation
Shared Package
ML20003D781 List:
References
L1L-078, L1L-78, NUDOCS 8103310601
Download: ML20003D780 (2)


Text

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s Metropolitan Edison Company Post Office Box 480 0- -- Middletown, Pennsylvania 17057 Writer's Direct Dial Number March 26,1981 LlL 078

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Office of Nuclear Reactor Regulation Attn: R. W. Reid, Chief Operating Reactors Branch No. 4 2- di

[3 g Division of Licensing U. S. Nuclear Regulatory Commission

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Dear Sir:

s'e' m ee Mile Island Nuclear Station, Unit 1 (TMI-1)

Operating License No. DPR-50 Docket No. 50-289 Asymmetric LOCA Loads Enclosed please find our response to your letter of January 9,1981 to all Babcock and Wilcox Licensees to your request for additional information relating to our submittal on Asymmetric LOCA Loads (ALL). CPU, in conjunction with the other members of the B&W Owners Group and with B&W, has formulated a plan for responding to your request in the most expeditious manner possible.

We request a technical review meeting with your Staff on April 2 and 3 in your Bethesda offices. At this meeting we would hope to resolve approxi-mately 60 questions by cross referencing docketed information. We antici-pate that the meeting minutes will show that these questions are resolved.

We also intend to describe our proposed responses to the remaining questions and to clarify any ambiguities that might exist while providing the Staff with sufficient information to develop a draft Safety Evaluation Report. The final half-day of meetings will be with the entire ALL Owners Group Subcommittee, at which time we will summarize the results of the technical meeting.

Due to the large effort involved in answering the questions we will not be able to provide written responses until late June, 1981. Our intent is to provide these draft responses to the Staff and meet with you the week of July 6. Following this meeting we will make a formal submittal incorporating any comments that develop from these discussions.

I would also like to inform you that GPU is initiating a program to evaluate the conservatisms remaining within the analyses of asymmetric LOCA loads.

Our intent is to determine if het leg restraints will indeed be required to demonstrate acceptability. As such we are modifying our commitment to you in our letter of September 11, 1980. At thet time we committed to install the restraints at the first refueling outage following restart of the unit.

We are instead committing to either install those restraints or to provide the Staff with justification for the adequacy of the existing plant design by the first refueling outage following restart. I would like to stress that the reason for the change in commitments is the evaluation work that

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R. W. Reid LlL 078 could not be undertaken prior to completion of BAW 1621. The effort involved in preparing that submittal literally left no one available to do the additional evaluation work. In the intervening time we have been able to expend sone effort to find conservatisms which, if removed, might demonstrate the accept-ability of the existing plant design.

Sincerely,

. . ' f uYll Directcr, TMI-l HDII: LWII:1ma cc: B. H. Crier D. Dilanni H. Silver L. Barrett

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