ML11238A158

8/25/11 - Summary of Telephone Conference Call Between NRC and Energy Northwest Concerning Drais Pertaining to the SAMA Review of the Columbia Generating Station License Renewal Application

ML11238A158
Person / Time
Site:	Columbia
Issue date:	09/14/2011
From:	Doyle D I License Renewal Projects Branch 2
To:
Doyle D I, 415-3748
References
Download: ML11238A158 (7)

Text

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!! WASHINGTON, D.C. 20555-0001

<C 0 September 14,2011 1--? ****....

Energy Northwest Columbia Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 25, 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW OF THE COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest (the applicant) held a telephone conference call on August 25, 2011, to discuss draft requests for additional information concerning the Severe Accident Mitigation Alternatives review of the Columbia Generating Station license renewal application.

Enclosure 1 provides a list of the participants and Enclosure 2 contains a list of the draft requests for additional information including a brief description of the status of the items. The applicant had an opportunity to comment on this summary. Daniel I. Doyle, roject Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-397

Enclosures:

1. List of Participants

2. List of Draft Requests for Additional Information cc w/encls: Listserv LIST OF COLUMBIA GENERATING LICENSE RENEWAL SEVERE ACCIDENT MITIGATION ALTERNATIVES PARTICIPANTS Daniel Doyle Arthur Cunanan Ray Gallucci William Holston Maxwell Smith David Wrona Abbas A. Mostala Albert T. Chiang Marsha Eades Jerral E. "Dusty" Rhoads Blake Smith Jim Tansy John Twomey TELEPHONE CONFERENCE CALL AUGUST 25, 2011 AFFILIATIONS U.S. Nuclear Regulatory Commission (NRC) NRC NRC NRC NRC NRC Energy Northwest (EN) EN EN EN EN EN EN ENCLOSURE REQUESTS FOR ADDITIONAL COLUMBIA GENERATING LICENSE RENEWAL SEVERE ACCIDENT MITIGATION ALTERNATIVES AUGUST 25, The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of the applicant, Energy Northwest (EN), held a telephone conference call on August 25,2011, to discuss and clarify the following draft requests for additional information (RAls) concerning the Severe Accident Mitigation Alternatives (SAMA) review of the Columbia Generating Station (CGS) license renewal application.

Background:

In its letter dated January 28, 2011 (ADAMS Accession Number ML 110330395), Energy Northwest identified SAMA candidate FL-06R as potentially cost-beneficial.

In the January 28 letter, there were several different descriptions of SAMA FL-06R: ';Add additional NDE and inspections to increase probability of detecting degraded lines in raw water systems in the Control Building:' (page 6 of 173) '1mprove control building flooding scenarios:' (page 19 of 173) 'Perform additional NDE and inspections to the three lines identified in SAMA candidate FL-04R to verify that degradation is not occurring in these lines. The specific locations of the NDE would be selected from potentially susceptible areas using similar methods as used in the risk-informed in-service inspection program to detect wall thinning:' (pages 119 and 120 of 173) 'Perform additional NDE and inspections of the SW, TSW, and FP lines in the Control Building area of the Radwaste Building:' (page 167 of 173) Issue: Based on the descriptions of SAMA FL-06R, it appears to relate to managing the effects of aging. Potentially cost-beneficial SAMAs that relate to adequately managing the effects of aging may be mandated by the NRC as part of license renewal pursuant to 10 CFR Part 54. ENCLOSURE

-2 Draft Requests for Additional Information:

Draft RAI1: Provide a determination as to whether the affected structures, systems, or components (SSCs) identified in the SAMA candidate are within the scope of the license renewal safety review under 10 CFR Part 54. If they are within the scope of license renewal, explain how the f\lDE and inspections proposed in SAMA FL-06R differ from the aging management programs proposed for the same SSCs in the safety portion of the license renewal application (e.g., SW and FP systems).

Draft RAI 2: The SAMAs listed below were identified as potentially cost-beneficial in the January 28 letter. Energy Northwest stated that all these SAMA candidates will be considered for implementation through the normal processes for evaluating possible plant changes at Columbia Generating Station as described in response to RAI 6.j-1 iv. Provide a determination and rationale as to whether each potentially cost-beneficial SAMA relates to managing the effects of aging. SAM A ID SAMA Description AC/DC-28 Reduce common cause failures between EDG-3 and EDG-1/2 CC-03b Raise reactor core isolation cooling system backpressure trip setpoints FR-07a Improve the fire resistance of critical cables for containment venting FR-07b Improve the fire resistance of critical cables for transformer E-TR-6 FR-08 Improve the fire resistance of cables to residual heat removal and standby SW HV-02 Provide a redundant train or means of ventilation SR-05R Improve seismic ruggedness of MCC-7F and MCC-8F FL-05R Clamp on flow instruments to certain drain lines in the control building of the radwaste building and alarm in the control room FL-04R Add one isolation valve in the SW, turbine SW, and fire protection lines in the control building area of the radwaste building FL-06R Additional non-destructive evaluation and inspections to increase probability of detecting degraded lines in raw water systems in the Control Building CC-24R Backfeed the HPCS system with emergency bus SM-8 to provide a third power source for HPCS CC-25R Enhance alternate injection reliability by including residual heat removal service water and fire water crosstie in maintenance program OT-07R Increase operator training on systems and operator actions determined to be important from the PSA FW-05R Examine the potential for operators to control reactor feedwater and avoid a reactor trip OT-09R For the non-LOCA initiating events, credit the Z (power conversion system recovery) function FR-11 R Install early fire detection in the following analysis units: RC-02, RC-03, RC-04, RC-05, RC-07, RC-08, RC-11, RC-13, RC-14, and RC-1A

-Discussion:

The applicant stated that it understood the draft RAls. The applicant continued with a general discussion of the aging management review that covered the piping sections identified in SAM A candidate FL-06R and the relationship between the SAMA and the aging management program. The applicant also discussed the corrective action program and subsequent actions taken to address increased contribution to flooding from these lines. The NRC stated that it would issue the RAI letter for formal response.

September 14, 2011 Energy Northwest Columbia Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 25,2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW OF THE COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Energy Northwest (the applicant) held a telephone conference call on August 25, 2011, to discuss draft requests for additional information concerning the Severe Accident Mitigation Alternatives review of the Columbia Generating Station license renewal application.

Enclosure 1 provides a list of the participants and Enclosure 2 contains a list of the draft requests for additional information including a brief description of the status of the items. The applicant had an opportunity to comment on this summary. IRA! Daniell. Doyle, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket No. 50-397

Enclosures:

1. List of Participants

2. List of Draft Requests for Additional Information cc w/encls: Listserv DISTRIBUTION:

See next page ADAMS Accession No'.. ML 11238A 158 *concurred via email OFFICE LARPB2:DLR*

PM:RPB2:DLR BC:RPB2:DLR PM:RPB2:DLR NAME IKing DDoyle DWrona DDoyle DATE f9t1I11 9/13/11 9/14/11 9/14/11 OFFICIAL RECORD COpy Memorandum to Energy Northwest from D. Doyle dated September 14,2011

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON AUGUST 25,2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ENERGY NORTHWEST CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE SEVERE ACCIDENT MITIGATION ALTERNATIVES REVIEW OF THE COLUMBIA GENERATING STATION LICENSE RENEWAL APPLICATION DISTRIBUTION:

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