ML20148D449
| ML20148D449 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/28/1997 |
| From: | Buckley B NRC (Affiliation Not Assigned) |
| To: | Langenbach J GENERAL PUBLIC UTILITIES CORP. |
| References | |
| NUDOCS 9705300208 | |
| Download: ML20148D449 (4) | |
Text
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May 28, 1997 Mr. James W. Langenbach Vice President and Director, TMI GPU Nuclear Corporation P.O. Box 480 Middletown, PA 17057
SUBJECT:
THREE MILE ISLAND (TMI), UNIT 1 - DESIGN INSPECTION During a design inspection at TMI-1 that was performed during the period of November 12, 1996, through January 10, 1997, a concern was raised in regards to the makeup pump MU-P-IC configuration.
In order to continue our evaluation of the performance of makeup pump MU-P-IC following an engineered stfeguards actuation signal, it is requested that you provide the information requested in the enclosure within 30 days of receipt of this letter.
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 Distribution Docket File JLyons
Enclosure:
As stated PUBLIC OGC PDI-3 RF ACRS cc w/ encl: See next page SVarga PEselgroth, RI PMilano BBuckley EDunnington f
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May 28, 1997 Mr. James W. Langenbach Vice President and Director, TMI GPU Nuclear Corporation P.O. Box 480 Middletown, PA 17057
SUBJECT:
THREE MILE ISLAND (TMI), UNIT 1 - DESIGN INSPECTION During a design inspection at TMI-1 that was performed during the period of November 12, 1996, through January 10, 1997, a concern was raised in regards to the makeup pump MU-P-1C configuration.
In order to continue our evaluation of the performance of makeup pump MU-P-1C following an engineered safeguards actuation signal, it is requested that you provide the information requested in the enclosure within 30 days of receipt of this letter.
Sincerely, M
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 l
i l
Three Mile Island Nuclear Station, Unit No.1 cc:
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 Middletown, PA 17057 Rockville, MD 20852 John C. Fornicola William Dornsife, Acting Director Director, Planning and Bureau of Radiation Protection Regulatory Affairs Pennsylvania Department.of GPU Nuclear Corporation Environmental Resources 100 Interpace Parkway P.O. Box 2063 Parsippany, NJ 07054 Harrisburg, PA 17120
)
Jack S. Wetmore Dr. Judith Johnsrud P.anager, TMI Regulatory Affairs National Energy Comittee GPU Nuclear Corporation Sierra Club P.O. Box 480 433 Orlando Avenue Middletown, PA 17057 State College, PA 16803 Ernest L. Blake, Jr., Esquire Shaw, Pittman, Potts & Trowbridge 2300 N Street, NW.
Washington, DC 20037 Chairman Board of County Comissioners of Dauphin County Dauphin County Courthouse Harrisburg, PA 17120 Chairman Board of Supervisors of Londonderry Township R.D. #1, Geyers Church Road Middletown, PA 17057 Michele G. Evans Senior Resident Inspector (TMI-1)
U.S. Nuclear Regulatory Comission P.O. Box 311 Middletown, PA 17057 Regional Administrator, Region I U.S. Nuclear Regulatory Comission 475 Allendale Road King of Prussia, PA 19406
THREE MILE ISLAND UNIT 1 QUESTIONS REGARDING ALIGNMENT OF MAKEUP PUMP MU-P-lC l
1.
Provide the results of all previous tests involving a startup of makeup l
pump MU-P-IC with the delayed opening of its isolation valves in the l
suction and discharge lines.
Is the emergency core cooling system l-(ECCS) system integral test required at TMI-l?
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2.
Provide the results of your evaluation which would support the design adequacy of the above described system operation.
Discuss the actual characteristics of the stakeup pump, isolation valves and pump mini flow (if anyl considered in your evaluation.
l 3.
Section 3.3 of the Technical Specification (TS) for ECCS requires two operable makeup pumps during power operation. Can makeup pump MU-P-IC l
be considered as one of the two operable makeup pumps for the purpose of l
meeting this TS7 l
4.
It is the staff's understanding that the safety analyses'in chapter 14 l
of the FSAR were performed based on the operation of one makeup pump under all design basis events. Therefore, only two makeup pumps are needed for ECCS considering a single failure. Discuss any other plant i
safety assessment (IPE, etc.) in which credits are taken by the third makeup pump at THI-1.
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