ML110690997

Summary of Telephone Conference Call Held on 3/8/11 Btw the USNRC and Energy Northwest Concerning the Responses to the RAI Pertaining to the Columbia Generating Station, License Renewal Application (TAC Number ME3058)

ML110690997
Person / Time
Site:	Columbia
Issue date:	03/15/2011
From:	Cunanan A License Renewal Projects Branch 1
To:	Energy Northwest
cunanan, A NRR/DLR 415-3897
References
TAC ME3058
Download: ML110690997 (6)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 15. 2011 LICENSEE: Energy Northwest FACILITY: Columbia Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON MARCH 8. 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST. CONCERNING THE RESPONSES TO THE REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE COLUMBIA GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC NUMBER ME3058)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest (the applicant), held a telephone conference call on March 8, 2011. to discuss and clarify the responses to the NRC's request for additional information (RAI) concerning the Columbia Generating Station, license renewal application. provides a listing of the participants and Enclosure 2 contains a listing of the responses to the RAls discussed with the applicant. including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary.

Arthur D. Cunanan, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-397

Enclosures:

As stated cc w/encls: Listserv

TELEPHONE CONFERENCE CALL COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS MARCH 8, 2011 PARTICIPANTS: AFFILIATIONS:

Arthur Cunanan U.S. Nuclear Regulatory Commission (NRC)

Michelle Kichline NRC William Holston NRC Seung Min NRC Elizabeth Trillo Southwest Research Institute (SwRI)

Abbas Mostala Energy Northwest (EN)

Marsha Eades EN Janet Worthington EN Inderjit Singh EN Michelle Ferebauer EN Douglas Ramey EN Mitch McFarland AREVA David Lee AREVA ENCLOSURE 1

TELEPHONE CONFERENCE CALL COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION MARCH 8, 2011 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest, held telephone conference calls on March 8, 2011, to discuss the following responses to the request for additional information (RAI) concerning the Columbia Generating Station (CGS) license renewal application (LRA).

RAI B.2.5-3 Discussion: The staff discussed RAI related to in-scope buried diesel fuel oil storage tanks.

The applicant understands the RAI and will provide a response.

The staff has issued the RAI.

Response to RAI 3.3.2.3.16-1 Discussion: The staff discussed further evaluating LRA Table 3.3.2-18 and the component pump casing and LRA Tables 3.3.2-42 and 3.4.2-3.

The applicant understands the question and will provide a supplemental response to the question.

Response to RAt 3.1.2.3-01 Discussion 1: The staff discussed the applicant's email, dated February 25, 2011, indicating that in the Inservice Inspection (lSI) Program, surface or volumetric examination is not required for the CASS valve bodies < 4 inches under Row Numbers 182 and 183 in the amended LRA Table 3.1.2-3, which is addressed in the response to RAI 3.1.2.3-01.

The applicant clarified that the lSI Program includes VT-2 examination in the system leakage test and the VT-2 examination is the reason why the lSI Program is credited to manage the aging effects of the small-bore CASS valve bodies.

The staff understands the applicant's response and will not provide additional RAls.

Discussion 2: The staff discussed clarifying what method of the volumetric examination will be used to manage the cracking and reduction of fracture toughness of the CASS valve bodies < 4 inches and what the extent of the inspection is for the CASS valve bodies < 4 inches (For example. xx %) in the Small Bore Piping Program.

The applicant clarified that non-destructive or destructive volumetric examinations will be performed to manage the aging effects. The applicant also stated that volumetric examination ENCLOSURE 2

- 2 will be consistent with Section XI of ASME Code or, alternatively, destructive volumetric examinations will be performed.

The applicant further stated that the Small Bore Piping Program performs volumetric examinations of small-bore piping welds and the extent of the inspection is 10% of the weld population or a maximum of 25 welds. The inspections include volumetric examinations of pipe-to-valve welds and weld-adjacent areas of the CASS valve bodies less than 4 inches. The volumetric examinations are credited to manage the cracking (due to stress corrosion cracking and due to thermal or mechanical loading) of the CASS valve bodies less than 4 inches. The volumetric examinations will also confirm that the reduction of fracture toughness of the CASS valve bodies is adequately managed.

Also, the applicant stated that in addition to the volumetric examinations of the pipe-to-valve welds and weld-adjacent areas, the Small Bore Piping Program includes additional volumetric (destructive or non-destructive) examinations of the valve bodies to further confirm that the reduction of fracture toughness does not adversely affect the integrity of the valve bodies.

Finally, the applicant discussed that 3 CASS valves will be examined and these examinations are also credited to manage the cracking due to stress corrosion cracking and cracking due to thermal or mechanical loading of the valve bodies. Justification for the examination of 3 CASS valves will be docketed in the applicant's supplement response.

The staff understands the applicant's response and will not provide additional RAls.

March 15, 2011 LICENSEE: Energy Northwest FACILITY: Columbia Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON MARCH 8, 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST, CONCERNING THE RESPONSES TO THE REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE COLUMBIA GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC NUMBER ME3058)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest (the applicant), held a telephone conference call on March 8, 2011, to discuss and clarify the responses to the NRC's request for additional information (RAI) concerning the Columbia Generating Station, license renewal application. provides a listing of the participants and Enclosure 2 contains a listing of the responses to the RAls discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary.

IRA!

Arthur D. Cunanan, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-397

Enclosures:

As stated cc w/encls: Listserv DISTRIBUTION:

See next page ADAMS Accession Number" ML110690997 OFFICE PM:RPB1 :DLR LA:DLR PM:RPB1 :DLR PM:RPB1:DLR I INAME ACunanan SFigueroa BPham ACunanan l£ATE 03/14/11 03/11111 03/15/11 03/15/11 OFFICIAL RECORD COPY

Letter to Energy Northwest from Arthur D. Cunanan dated March 15, 2011

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON MARCH 8, 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST, CONCERNING THE RESPONSES TO THE REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE COLUMBIA GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC NUMBER ME3058)

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