ML061090106

Request for Additional Information, Review of Nine Mile Point Nuclear Station, Units 1 and 2, License Renewal Application (TAC Nos. MC3272 and MC3273)

ML061090106
Person / Time
Site:	Nine Mile Point
Issue date:	04/19/2006
From:	Le N NRC/NRR/ADRO/DLR/RLRB
To:	O'Connor T Nine Mile Point
Le, Ngoc, NRR/DLR/RLRA, 415-1458
References
TAC MC3272, TAC MC3273
Download: ML061090106 (5)

Text

April 19, 2006Mr. Timothy J. O'ConnorVice President Nine Mile Point Nuclear Station, LLC

P.O. Box 63 Lycoming, NY 13093

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF NINEMILE POINT NUCLEAR STATION, UNITS 1 AND 2, AMENDED LICENSE RENEWAL APPLICATION (TAC NOS. MC3272 AND MC3273)

Dear Mr. O'Connor:

On December 20, 2005, Constellation Energy Group, Inc. (CEG), submitted its annual updatefor the amended license renewal application (ALRA) for Nine Mile Point Nuclear Station, Unit 1 (NMP1). The annual update is required by 10 CFR 54.21(b). The NRC staff is reviewingthe information contained in the annual update, and has identified, in the enclosure, area whereadditional information is needed to complete the review.The staff requests that you provide your response within 30 days from the date of this letter. Ifyou have any questions regarding this letter or if circumstances result in your need to revise the response date, please contact me by telephone at 301-415-1458 or via e-mail at nbl@nrc.gov

.Sincerely, /RA/N. B. (Tommy) Le, Senior Project ManagerLicense Renewal Branch B Division of License Renewal Office of Nuclear Reactor RegulationDocket Nos. 50-220 and 50-410

Enclosure:

As statedcc w/encl: See next page

ML061090106 DISTRIBUTION

See next pageDocument Name: E:\Filenet\ML061090106.wpdOFFICERLRB:PMDLR:LARLRB:BCNAMEN. LeY.EdmondsJ. Zimmerman DATE04/ 18 /0604/ 18 /0604/ 09 /06 Letter to Timothy J. O'Connor from Ngoc Le dated _April 19, 2006

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF NINEMILE POINT NUCLEAR STATION, UNITS 1 AND 2, AMENDED LICENSE RENEWAL APPLICATION (TAC NOS. MC3272 AND MC3273)DISTRIBUTION

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OPA 1CEG has identified that AMP B2.1.6, "BWR Stress Corrosion Cracking Program," is an AMPthat is consistent with the program attributes in AMP XI.M7, "BWR Stress Corrosion Cracking," with anexception. ENCLOSURENINE MILE POINT NUCLEAR STATION, UNITS 1 AND 2 (NMP1 AND NMP2)AMENDED LICENSE RENEWAL APPLICATION (ALRA)REQUEST FOR ADDITIONAL INFORMATION (RAI) - BATCH 7TIME-LIMITED AGING ANALYSIS 4.7.5: RWCU WELD OVERLAY FATIGUE FLAW GROWTH EVALUATIONS (NMP1 ONLY)RAI 4.7.5A-1 On January 23, 2006, the staff held a conference call (ADAMS Accession No. ML060890579)with Constellation Energy Group (CEG, the applicant) to discuss the basis for approving Time-Limited Aging Analysis (TLAA) 4.7.5, "Reactor Water Cleanup Weld Overlay Fatigue Flaw Growth Evaluations (NMP 1 Only)." Consistent with the discussion, the staff has stated that themost appropriate basis for approving TLAA 4.7.5 would be to credit an acceptable inspection based aging management program (AMP) for the management of intergranular stress corrosion cracking (IGSCC) in the reactor water cleanup (RWCU) system welds 33-FW-22 and 33-FW-23A and their repair overlays. This is permissible under the acceptance criteria of 10 CFR 54.21(c)(1)(iii). The applicant stated that it will consider revising the information to itsletter dated December 20, 2005, and will amend the letter, per information provided by the staffduring the January 23, 2006, phone call, to credit inspections as an AMP for accepting TLAA 4.7.5 under 10 CFR 54.21(c)(1)(iii).This RAI requests that CEG address the following staff concerns in its upcoming amendedletter, if ultrasonic testing (UT) is credited as an AMP for accepting TLAA 4.7.5 under 10 CFR 54.21(c)(1)(iii):A. Clarify that, pursuant to 10 CFR 54.21(c)(1)(iii), CEG is crediting AMP B2.1.6, "BWR StressCorrosion Cracking Program" and the augmented UT examination program, as specified in Topical Report BWRVIP-75-A, "Technical Basis for Revisions to Generic Letter 88-01 Inspection Schedules [April 2002]," for Category E austenitic stainless steel piping welds as the basis for managing IGSCC in RWCU welds 33-FW-22 and 33-FW-23A and their corresponding overlay repairs. Note that those austenitic steel pipe welds have been repaired with austenitic stainless steel weld overlays. B.Revise the NMP1 specific version of AMP B2.1.6, "BWR Stress Corrosion CrackingProgram," to include the following enhancements to program attributes:

1(1)[Scope of Program]: Enhancement to include the overlay repairs on RWCU welds33-FW-22 and 33-FW-23A within the scope of the AMP. (2)[Detection of Aging Effects]: Enhancement to specify that site-qualified UT techniqueswill be used to monitor RWCU welds 33-FW-22 and 33-FW-23A for further evidence ofcracking and for flaw growth into weld metal deposits for the overlays. The staff recommends that enhancement of the program attribute be consistent with CEG'scommitments that were made in response to GL 88-01, "NRC Position on IGSCC inBWR Austenitic Piping [January 15, 1988]," and commitments made to implement the recommended guidelines of Topical Report BWRVIP-75-A. (3)[Monitoring and Trending]: Enhancement to establish a conservative applicant basedre-inspection frequency for performing the UT examinations of the overlays in RWCU welds 33-FW-22 and 33-FW-23A. The staff recommends that enhancement of the program attribute be consistent with CEG's commitments that were made in response to GL 88-01 and commitments made to implement the recommended guidelines of Topical Report BWRVIP-75-A. (4)[Operating Experience]: Enhancement of the program attribute to specify that CEGperformed the most recent UT examinations of the RWCU welds 33-FW-22 and 33-FW-23A in 2003 and to summarize the results of the 2003 UT inspections.