ML021050164

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Response to NRC Bulletin 2001-01, Circumferential Cracking of Reactor Pressure Vessel Head Penetration Nozzles
ML021050164
Person / Time
Site: Prairie Island Xcel Energy icon.png
Issue date: 03/29/2002
From: Nazar M
Nuclear Management Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
IEB-01-001, TAC MB2653
Download: ML021050164 (3)


Text

NMC P Committed to Nuclear Excellence F

Nuclear Management Company, LLC Prairie Island Nuclear Generating Plant 1717 Wakonade Dr. East

NRC Bulletin 2001-01 requested Prairie Island specific information regarding the potential for cracking of its reactor pressure vessel head penetration (VHP) nozzles, inspections performed and planned, and details of previously identified cracking. In addition, the Bulletin requested the inspection results following the next refueling outage: "... a description of the extent of VHP nozzle leakage and cracking detected at your plant, including the number, location, size, and nature of each crack detected..."

Prairie Island Unit 2 was shutdown for refueling in February 2002 and the vessel head was inspected per the commitment made in the original response to Bulletin 2001-01.

Prior to the inspection, the inspector reviewed EPRI document 1006296, "Visual Examination for Leakage of PWR Reactor Head Penetrations." There were no indications of leakage or wastage noted by the inspector.

In this letter we have made no new Nuclear Regulatory Commission commitments.

Please contact Jack Leveille (651-388-1121, Ext. 4142) if you have any questions related to this letter.

Mano K. Nazar Site Vice Presid t

Prairie Island N lear Generating Plant c: (see next page)

C6 I

USNRC March 29, 2002 Page 2 NUCLEAR MANAGEMENT COMPANY, LLC c: Regional Administrator - Region III, NRC Senior Resident Inspector, NRC NRR Project Manager, NRC

Attachment:

Affidavit 2nd Response to NRC Bulletin 2001-01.DOC

UNITED STATES NUCLEAR REGULATORY COMMISSION NUCLEAR MANAGEMENT COMPANY, LLC PRAIRIE ISLAND NUCLEAR GENERATING PLANT DOCKET NO. 50-306 RESPONSE TO NRC BULLETIN 2001-01:

"CIRCUMFERENTIAL CRACKING OF REACTOR PRESSURE VESSEL HEAD PENETRATION NOZZLES" Nuclear Management Company, LLC, a Wisconsin corporation, with this letter is submitting information requested by NRC Bulletin 2001-01.

This letter contains no restricted or other defense information.

NUCLEAR MANAGEMENT COMPANY, LLC Mano K. Nazair

/t Site Vice Presd t

Prairie Island N lear Generating Plant On this c-9 day of

&/;j ý.

before me a notary public in and for said County, personally appeared Mano K. Nazar, Site Vice President, Prairie Island Nuclear Generating Plant, and being first duly sworn acknowledged that he is authorized to execute this document on behalf of Nuclear Management Company, LLC, that he knows the contents thereof, and that to the best of his knowledge, information, and belief the statements made in it are true and that it is not interposed for delay.

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