ML20140F611

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Requests Addl Info Re Licensee 970207 Request for Amend to License to Decrease Time Interval Between Occurrence of LOCA & Starting of Hydrogen Recombiner from 9.8 Days to 9.0 Days
ML20140F611
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 06/11/1997
From: Buckley B
NRC (Affiliation Not Assigned)
To: Langenbach J
GENERAL PUBLIC UTILITIES CORP.
References
TAC-M98522, NUDOCS 9706130162
Download: ML20140F611 (3)


Text

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June 11, 1997 Mr. James W. Langenbach

! Vice President and Director, TMI t

GPU Nuclear Corporation P.O. Box 480 Middletown, PA 17057 l

SUBJECT:

THREE MILE ISLAND NUCLEAR GENERATING STATION, UNIT 1 - REQUEST FOR i ADDITIONAL INFORMATION (TAC NO. M98522) 1 By letter dated February 7, 1997, you requested a license amendment to decrease the time interval between the occurrence of a loss-of-coolant l accident and the starting of a hydrogen recombiner from 9.8 days to 9.0 days.

Based on our review of your submittal, we find that additional information, as delineated in the enclosure, is required in order to continue our evaluation.

Sincerely, Original signed by Bart C. Buckley, Senior Project Manager Project Directorate I-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket No. 50-289

Enclosure:

As stated cc w/ enc 1: See next page Distribution Docket File ACRS PUBLIC PEselgroth, RI i "S?!;'a"'

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OFFICE PM: POI-3 9A E LA:PDil-1 l6 (A)D:PQL-3 EMCB 9'_/ l l NAME BBuckley AD EDunnington Afb PMilanb ' " JStro' snider DATE- 06/ IN97 06/4/97 06/!l/97 06/ q /97 0FFICIAL RECORD COPY

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l l Three Mile Island Nuclear Station, Unit No.1 l

cc:

l Michael Ross Robert B. Borsum

Director, O&M, TMI B&W Nuclear Technologies GPU Nuclear Corporation Suite 525 P.O. Box 480 1700 Rockville Pike l Middletown, PA 17057 Rockville, MD 20852 1

John C. Fornicola William Dornsife, Acting Director -

Director, Planning and Bureau of Radiation Protection 1 Regulatory Affairs Pennsylvania Department of GPU Nuclear Corporation Environmental Resources 100 Interpace Parkway P.O. Box 2063 Parsippany, NJ 07054 Harrisburg, PA 17120 l

Jack S. Wetmore Dr. Judith Johnsrud Manager, TMI Regulatory Affairs National Energy Committee GPU Nuclear Corporation Sierra Club P.O. Box 480 433 Orlando Avenue l Middletown, PA 17057 State College, PA 16803 Ernest L. Blake, Jr., Esquire Shaw, Pittman, Potts & Trowbridge l 2300 N Street, NW.

! Washington, DC 20037 l Chairman Board of County Commissioners l of Dauphin County

, Dauphin County Courthouse Harrisburg, PA 17120 Chairman Board of Supervisors l of Londonderry Township l R.D. #1, Geyers Church Road l Middletown, PA 17057 l

1 Michele G. Evans Senior Resident Inspector (TMI-1)

U.S. Nuclear Regulatory Commission P.O. Box 311 Middletown, PA 17057 Regional Administrator, Region I

U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 t

e Reouest for Additional Informatisn l

In your submittal dated February 7,1997, one of the requested chsnges to the Technical Specifications for the TMI-1 plant addresses a proposed decrease of the allowable time interval between a loss-of-coolant accident and operation of a hydrogen recombiner from 9.8 days to 9.0 days. The reason given for this change is that the additional hydrogen generated after an accident from corrosion of zine on the galvanized scaffolding stored in the containment will cause higher hydrogen buildup rates. Please provide your calculation showing that this additional source of hydrogen will be accomodated by changing the recombiner starting time from 9.8 to 9.0 days.

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ENCLOSURE i