ML20010D805
| ML20010D805 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 08/24/1981 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Mayer L NORTHERN STATES POWER CO. |
| References | |
| NUDOCS 8108310545 | |
| Download: ML20010D805 (4) | |
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AUG 2 4 1981 ~
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ket File D PMKreutzer-3 Docket No. 50-306 NHL FUK RAClark L PDR DDilanni NSIC Gray File Mr. L. O. Mayer, Manager TERA WHazelton Nuclear Support Services Northern States Power Company en 414 Nicollet Mall - 8th Floor OELE Minneapolis, Minnesota 55401 I&E-3
Dear Mr. Mayer:
'fH t es
SUBJECT:
REQUEST FOR MEETING TO DISCUSS REACTOR COOLANT PUMP (RCP)
FAILURE AT PRAIRIE ISLAND UNIT NO. 2 AND PROPOSED AGENDA In regard to your LicensecEvent Report submitted by letter dated July 17, 1981 regarding the Prairie Island Nuclear Generating Plant Unit 2 RCP failure, we request that you and the representatives of your con-tractor performing the metallurigical examination meet with us to discus!, the details of the June 11, 1981 failure of RCP No. 21.
In order for the meeting to be as informative and productive as pos-sible, we suggest that it be scheduled after we have reviewed your follow up report and after Westinghouse has completed their examination of the shift failure. While a specific date for the meeting cannot be set at this time, we suggest that mid-September 1981 be considered as a reasonable target date. A proposed agenda for the meeting is enclosed.
Agenda topics are based on the information currently available to us.
Please contact D. Dilanni, Prairie Island Project Manager, to establish a firm date for the meeting and for any additional information you may require.
Sincerely.
Originsi signed by:
ELC Robert. Clark, Chief Operating Reactors Branch #3 Division of Licensing Enclousre: As stated e
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AUG 24 my Docket No. 50-306 Mr. L. O. Mayer, Manager Nuclear Support Services Northern States Power Company 414 Nicollet Mall - 8th Floor Minneapolis, Minnesota 55401
Dear Mr. Mayer:
SUBJECT:
RE00EST FOR MEETING TO DISCUSS REACTOR COOLANT PUMP (RCP)
FAILURE AT PRAIRIE ISLAND UNIT NO. 2 AND PROPOSED AGENDA In regard to yourLicensee Event Report submitted by letter dated July 17, 1981 regarding the Prairie Island Nuclear Generating Plant Unit 2 RCP failure, we request that you and the representatives of your con-tractor performing the metallurigical examination meet with us to discuss the details of the June 11, 1981 failure of RCP No. 21.
In order for the meeting to be as informative ard productive as pos-sible, we suggest that f t be scheduled ai?r we have reviewed your follow up report and after Westinghouse has completed their examination of the shift failure. While a specific date for the meeting cannot be set at this time, we suggest that mid-September 1981 be considered as a reasonable timet date. A proposed agenda for the meeting is enclosed.
Agenda topics are based on the information currently available to us.
Please contact D. Dilanni, Prairie Island Project Manager, to establish a firm date for the meeting and for any additional information you may require.
Sincerely, a
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Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing Enclousre: As stated cc: See next page
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Northern States Power Company j
cc:
Gerald Charnoff, Esquire Bernard M. Cranum Shaw, Pittman, Potts and Trowbridge Bureau of Indian Affairs, DOI 1800 M Street, N.W.
15 South 5th Street Washington, D. C.
20036 Minneapolis, Minnesota 55402 Mr. Louis J. Breimburst Mr. John C. Davidson, Chairman Executive Director Goodhue County Board of Commissioners Minnesota Pollution Control Agency 321 West Third Street 1935 W. County Road B2 Red Wing, Minnesota 55066 Roseville, Minnesota 55113 U. S. Environmental Protection Agency The Environmental Conservation Library Federal Activities Branch Minneapolis Public Library Region V Office 300 Nicollet Mall ATTN:
EIS COORD* ATOR Minneapolis, Minnesota 55401 230 South Dear 5;rn Street Chicago, Illinois 60604 Mr. F. P. Tierney, Plant Manager Prairie Island Nuclear Generating Plant Northern States Power Company Route 2 Welch, Minnesota 55089 Chairman, Public Service Commistion Joclyn F. Olson, Esquire of Wisconsin Special Assistant Attorney General Hill Farms State Office Building Minnesota Pollution Control Agency Madison Wisconsin 53702 1935 W. County Road B2 Roseville, Minheosta 55113 Robert L. Nybo, Jr., Chairman Minnesota-Hisconsin Boundary Area Commission 619 Second Street
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Hudson, Wisconsin 54016 U.S. Nuclear Regulatory Commission
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Resident Inspectors Office l
Route #2, Box 500A Welch, Minnesota 55089 i
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Proposed Agenda RCP No. 21 Failure of the Pump Shaft Prairie Island Nuclear Generating Plant, Unit No. 2 Docket No. 50-306 1.
Operating experience leading to the discovery of the pump failure at P. I. Unit No. 2.
2.
Operating experience of other pumps of similar design including operating history as of September 1,1981.
3.
Details of the failure mode of the P. I. Unit No. 2 pump including a detailed design description of the pump shaft.
4.
Overview of the safety significance of the pump shaft failure at P. I.
5.
Discussion of the pump failure at P. I. as compared to other past pump failures (i.e. such as Surry).
6.
Monitoring methods and criteria for measuring pumps vibrations including the bases for unacceptable levels of vibration.
The presentation should also include monitoring methods such as axial and radial measurements, local vs. control room readouts, etc. Also, give a description of. the presently in' talled field measuring devices.
7.
Pump shaft material selection, manufacturing history and mechanical loading.
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