ML010950534

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Notice of Meeting with the Electric Power Research Institute'S Materials Reliability Program to Discuss the Generic Implications and Proposed Industry Actions of the Circumferential Cracking Found at Oconee Unit 3
ML010950534
Person / Time
Site: Nuclear Energy Institute
Issue date: 04/05/2001
From: Sheron B
NRC/NRR/ADPT
To: Marion A
Nuclear Energy Institute
Carpenter C, NRR/DRIP/RGEB, 4415-1282
References
Download: ML010950534 (4)


Text

April 05, 2001 Mr. Alex Marion, Director Engineering Nuclear Energy Institute 1776 I Street, N.W., Suite 400 Washington, D.C. 20006-3708

SUBJECT:

MRP MEETING ON CRDM CRACKING DISCUSSION TOPICS

Dear Mr. Marion:

The staff will be meeting with the Electric Power Research Institutes Materials Reliability Program (MRP) on Thursday, April 12, 2001, to discuss the generic implications and proposed industry actions of the circumferential cracking found on pressurized water reactor (PWR) control rod drive mechanism (CRDM) upper head penetrations at Oconee Unit 3.

In addition to a discussion of the Oconee circumferential CRDM cracking, the NRC staff requests that the MRPs presentation on their proposed actions to address the generic aspects of the CRDM cracking issue include, but not be limited to, the following items:

" A discussion of how the results of the CRDM cracking found at Oconee is being utilized by the MRP to address this issue on a generic basis. In order to provide sufficient background, the staff requests that an overview of the Oconee CRDM cracking be given, and include, as a minimum, the results of non-destructive examinations (NDE) and any destructive examinations performed to date, a discussion of the repairs performed or planned, the licensees plans for resolving this issue, the implications of this experience on the reliability of ongoing inspections, and the potential for circumferential failure of a PWR CRDM penetration.

" Discussion of the inspection plans, schedule, scope and method to be utilized in performing NDE of the CRDMs. This discussion is requested to include a listing of all PWRs that are either in, or will be coming down for, an outage during the current outage season, any inspections that have been or will be performed by these licensees, and whether licensees will expand the scope of inspections beyond that presently required by Generic Letter (GL) 88-05, "Boric Acid Corrosion of Carbon Steel Reactor Pressure Boundary Components in PWR Plants, dated March 17, 1988 (e.g., removal of insulation, etc.).

" The schedule for and scope of a generic safety assessment of PWR CRDMs, supported by deterministic and/or risk-informed assessments, that establishes a technical justification for continued operation with potentially degraded penetrations until such time as comprehensive inspections can be performed of the PWR CRDMs.

Mr. Alex Marion " A discussion of the implications of this recent service experience on the commitments made in response to GL 97-01, "Degradation of Control Rod Drive Mechanism Nozzle And Other Vessel Closure Head Penetrations," dated April 1, 1997.

If you have any question regarding this request, please contact Jack Strosnider of my staff at (301) 415-3298.

Sincerely,

/RA/Signed by B. Sheron Brian Sheron, Associate Director Project Licensing & Technical Analysis Office of Nuclear Reactor Regulation Project No. 689 cc: See next page

Mr. Alex Marion " A discussion of the implications of this recent service experience on the commitments made in response to GL 97-01, "Degradation of Control Rod Drive Mechanism Nozzle And Other Vessel Closure Head Penetrations," dated April 1, 1997.

If you have any question regarding this request, please contact Jack Strosnider of my staff at (301) 415-3298.

Sincerely,

/RA/Signed by B. Sheron Brian Sheron, Associate Director Project Licensing & Technical Analysis Office of Nuclear Reactor Regulation Project No. 689 cc: See next page DISTRIBUTION:

EMCB R/F DMatthews/CACarpenter AHiser WLanning, R1 SCollins/JJohnson WBeckner WKoo CCasto, R2 WBorchardt SWest JMedoff JGrobe. R3 MEMayfield DAJackson AHowell, R4 NChokshi DOCUMENT NAME: C:\FileNet\ML010950534.wpd To receive copy, indicate: C = Copy w/o attachment/enclosure; A = Copy with attachment/enclosure; N = None OFC EMCB C RGEB C SC:EMCB C C:EMCB C D:DE C ADPT:NRR NAME CECarpenter PWen KWichman WBateman JRStrosnider BWSheron DATE 04/03/2001 04/04/2001 04/04/2001 04/04/2001 04/04 /2001 04/05/2001 OFFICIAL RECORD COPY

Nuclear Energy Institute Project No. 689 cc:

Mr. Ralph Beedle Ms. Lynnette Hendricks, Director Senior Vice President Plant Support and Chief Nuclear Officer Nuclear Energy Institute Nuclear Energy Institute Suite 400 Suite 400 1776 I Street, NW 1776 I Street, NW Washington, DC 20006-3708 Washington, DC 20006-3708 Mr. Jim Davis, Director Mr. Charles B. Brinkman, Director Operations Washington Operations Nuclear Energy Institute ABB-Combustion Engineering, Inc.

Suite 400 12300 Twinbrook Parkway, Suite 330 1776 I Street, NW Rockville, Maryland 20852 Washington, DC 20006-3708 Mr. David Modeen, Director Mr. H. A. Sepp, Manager Engineering Regulatory and Licensing Engineering Nuclear Energy Institute Westinghouse Electric Company Suite 400 P.O. Box 355 1776 I Street, NW Pittsburgh, Pennsylvania 15230-0355 Washington, DC 20006-3708 Mr. Anthony Pietrangelo, Director Larry Mathews, MRP Risk & Performance Based Regulation Southern Nuclear Operating Company Nuclear Energy Institute Manager, Inspection and Testing Services Suite 400 P. O. Box 1295 1776 I Street, NW Birmingham, AL 35201 Washington, DC 20006-3708 Vaughn Wagoner, Technical Chair Avtar Singh, EPRI MRP Manager Assessment Committee Electric Power Research Institute Carolina Power & Light Company P. O. Box 10412 One Hannover Square 9C1 3412 Hillview Ave.

P.O. Box 1551 Palo Alto, CA 94303 Raleigh, NC 27612 C. Thomas Alley, Jr., Technical Chair Mr. Allan McIlree, EPRI Inspection Task Assessment Manager Duke Power Company Electric Power Research Institute Nuclear General Office P. O. Box 10412 526 South Church Street 3412 Hillview Ave Mail Code EC09O Palo Alto, CA 94304 PO Box 1006 Charlotte NC 28201 Gary D. Moffatt, Technical Chair Frank Ammirato, EPRI Repair/Mitigation Task Inspection Manager V. C. Summer Nuclear Station EPRI NDE Center P. O. Box 88 P. O. Box 217097 Jenkinsville, SC 29065 1300 W. T. Harris Blvd.

Charlotte, NC 28221