ML103490417

12/1/10 Summary of Telephone Conference Call Held Btw the USNRC and Pacific Gas and Electric Company Concerning Draft Request for Additional Information Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA

ML103490417
Person / Time
Site:	Diablo Canyon
Issue date:	01/10/2011
From:	Ferrer N License Renewal Projects Branch 2
To:
Ferrer, N B, NRR/DLR, 415-1045
References
TAC ME2896, TAC ME2897
Download: ML103490417 (5)

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UNITED STATES

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NUCLEAR REGULATORY COMMISSION

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January 10, 2011

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• • • • i' LICENSEE:

Pacific Gas and Electric Company FACILITY:

Diablo Canyon Nuclear Power Plant, Units 1 and 2 SUB~IECT:

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON DECEMBER 1, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E or the applicant) held a telephone conference call on December 1, 2010, to obtain clarification on the staffs draft request for additional information (D RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application.

By email dated September 30, 2010, the staff sent the applicant a D-RAI regarding aging management programs. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staffs D-RAI. Enclosure 1 provides a listing of the participants. Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification.

The applicant had an opportunity to comment on this summary.

Nathaniel Ferrer, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323

Enclosures:

As stated cc w/encls: Distribution via Listserv

TELEPHONE CONFERENCE CALL DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS DECEMBER 1, 2010 PARTICIPANTS AFFILIATIONS Nate Ferrer U.S. Nuclear Regulatory Commission (NRC)

Michelle Kichline NRC Terry Grebel Pacific Gas and Electric Company (PG&E)

Kevin Braico PG&E Chris Beard PG&E ENCLOSURE 1

Diablo Canyon Nuclear Power Plant, Units 1 and 2 License Renewal Application Request for Additional Information Aging Management Programs D-RAI82.1.17-2

Background:

Generic Aging Lessons Learned aging management program XI.M33, "Selective Leaching of Materials," states, in the "scope of program" program element, that the program includes a one-time visual inspection and hardness measurement of a selected set of sample components to determine whether loss of material due to selective leaching is not occurring for the period of extended, operation.

License renewal application Section B2.1.17, Selective Leaching of Materials, states that the program includes a one-time visual inspection and hardness measurement or other industry-accepted mechanical inspection techniques (where feasible based on form and configuration) of selected components that may be susceptible to selective leaching to determine whether loss of material due to selective leaching is occurring.

Issue:

Due to the uncertainty in determining the most susceptible locations and the potential for aging to occur in other locations, the staff noted that large sample sizes (at least 20%) may be required in order to adequately confirm an aging effect is not occurring. The applicant's Selective Leaching Prograni does not include specific information regarding how the selected set of components will be chosen or how the sample size will be determined.

Request:

Provide specific information regarding how the selected set of components to be sampled will be determined and the size of the sample of components that will be inspected.

Discussion The U.S. Nuclear Regulatory Commission staff further explained its concerns as described in D-RAI B2.1.17 -2. The applicant was clear about the staff's concerns and agreed to provide a formal response to address this D-RAI. Pending response by the applicant, the staff does not plan to issue a formal RAI.

ENCLOSURE 2

• January 10, 20100 LICENSEE:

Pacific Gas and Electric Company FACILITY:

Diablo Canyon Nuclear Power Plant, Units 1 and 2

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON DECEMBER 1,2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E or the applicant) held a telephone conference call on December 1, 2010, to obtain clarification on the staffs draft request for additional information (D RAI) regarding the Diablo Canyon Nuclear Power Plant license renewal application.

By email dated September 30,2010, the staff sent the applicant a D-RAI regarding aging management programs. PG&E reviewed the information contained therein, and requested a telephone conference call. The telephone conference call was useful in clarifying the intent of the staffs D-RAI. Enclosure 1 provides a listing of the participants. Enclosure 2 provides discussions on D-RAls for which the applicant requested clarification.

The applicant had an opportunity to comment on this summary.

IRA!

Nathaniel Ferrer, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323

Enclosures:

As stated cc w/encls: Distribution via Listserv DISTRIBUTION:

See next page ADAMS Accession No.: ML103490417

• concurrence via e-mail I P'VI'RPB2:DLR LA:DLR*

SFigueroa 12/15/10 BC:RPB2:DLR PM:RPB2:DLR DWrona NFerrer 01/10/10 OFFICIAL RECORD COpy

Memorandum to Pacific Gas and Electric Company from N. Ferrer dated January 10, 2010

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON DECEMBER 1,2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897)

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