ML101330252

4-13-2010, Telecon Summary Re Draft Request for Additional Information Pertaining to the License Renewal Application

ML101330252
Person / Time
Site:	Palo Verde
Issue date:	06/02/2010
From:	Lisa Regner License Renewal Projects Branch 2
To:	Office of Nuclear Reactor Regulation
Nate Ferrer, DLR/RPB2 415-1045
References
Download: ML101330252 (8)

Text

June 2, 2010 LICENSEE: Arizona Public Service Company FACILITY: Palo Verde Nuclear Generating Station, Units 1, 2, and 3

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON APRIL 13, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ARIZONA PUBLIC SERVICE COMPANY, CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION PERTAINING TO THE PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3, LICENSE RENEWAL APPLICATION The U.S. Nuclear Regulatory Commission (the staff) and representatives of Arizona Public Service Company (the applicant) held a telephone conference call on April 13, 2010, to discuss and clarify the staffs draft request for additional information (RAI) concerning the Palo Verde Nuclear Generating Station, Units 1, 2, and 3, license renewal application. The telephone conference call was useful in clarifying the intent of the staffs draft RAI. provides a listing of the participants and Enclosure 2 contains a listing of the draft RAI discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary.

/RA/

Lisa M. Regner, Sr. Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-528, 50-529, and 50-530

Enclosures:

As stated cc w/encls: See next page

ML101330252 OFFICE LA:RPOB:DLR PM:RPB2:DLR BC:RPB2:DLR PM:RPB2:DLR NAME IKing LRegner DWrona LRegner 05/14/10 05/24/10 05/26/10 06/02/10 DATE

Memorandum to Arizona Public Service Company from Lisa M. Regner dated June 02, 2010

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON APRIL 13, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ARIZONA PUBLIC SERVICE COMPANY, CONCERNING DRAFT REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3, LICENSE RENEWAL APPLICATION DISTRIBUTION:

HARD COPY:

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L. Regner D. Drucker R. Hall B. Mizuno, OGC R. Treadway, RIV G. Pick, RIV

TELEPHONE CONFERENCE CALL PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS APRIL 13, 2010 PARTICIPANTS AFFILIATIONS Lisa Regner U.S. Nuclear Regulatory Commission (NRC)

Robert Sun NRC Angela Krainik Arizona Public Service Company (APS)

Glenn Michael APS Eric Blocher Strategic Teaming and Resource Sharing (STARS) Alliance ENCLOSURE 1

DRAFT REQUESTS FOR ADDITIONAL INFORMATION PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 LICENSE RENEWAL APPLICATION APRIL 13, 2010 The U.S. Nuclear Regulatory Commission (the staff) and representatives of Arizona Public Service Company (the applicant) held a telephone conference call on April 13, 2010, to discuss and clarify the following draft request for additional information (RAI) concerning the Palo Verde Nuclear Generating Station, Units 1, 2, and 3, license renewal application (LRA).

DRAFT RAI 3.3.2-2 In LRA Table 3.3.2-20 (Diesel Generator Fuel Oil and Storage System) there is an AMR result line crediting the Bolting Integrity Program for managing loss of preload for closure bolting in an environment of fuel oil.

In LRA Table 3.3.2-7 (Essential Spray Pond System) there is an AMR result line crediting the Bolting Integrity Program for managing loss of preload for closure bolting in an environment of raw water.

In LRA Table 3.3.2-2 (Spent Fuel Pool Cooling and Cleanup System) there is an AMR result line crediting the Bolting Integrity Program for managing loss of preload for closure bolting in an environment of treated borated water.

One acceptable method of inspecting closure bolting for loss of preload is to inspect the piping joint that the bolting holds together. If leakage or seepage is observed, then it is presumed that reduction of preload has occurred and the bolts should be tightened to avoid unacceptable leakage. When the closure bolting is in a normally dry environment (e.g., air, atmosphere/weather), it is plausible that leakage would be observed before failure of the bolted joint. However, in a wet environment (e.g., raw water, fuel oil, treated borated water) leakage or seepage could be readily detected by observation.

Request:

In the environments listed above, or similar wet environments, how does the Bolting Integrity Program inspect for reduction of preload?

ENCLOSURE 2

Discussion: Based on the discussion with the applicant, the staff will revise the question as follows. The revised question will be sent as a formal RAI.

Background

In the LRA, Tables 3.3.2.2 Spent Fuel Pool Cooling and Cleanup System, 3.3.2.7 Essential Spray Pond System, and 3.3.2.20 Diesel Fuel Oil Storage and Transfer System, there are aging management review (AMR) result lines for stainless steel or carbon steel closure bolting in environments of treated borated water, raw water, and fuel oil, respectively. The AMR results credit the Bolting Integrity Aging Management Program (AMP) with managing the aging effect-loss of preload for bolts in these wet environments.

Issue The LRA does not provide sufficient information for the staff to understand how the Bolting Integrity AMP can effectively manage loss of preload for bolts in wet environments where simple visual techniques during normal system walk downs could detect signs of closure bolting loosening, such as indications of leakage around a flange or gasket which would otherwise be noticed in a dry environment.

Request a) Explain what features or activities of the Bolting Integrity AMP will manage the aging effect of loss of preload for closure bolting that is in a wet environment and why the credited features or activities are adequate to ensure that loss of the subject bolts intended function(s) does not occur during the period of extended operation.

b) Clarify whether there are any indirect indicators that might be indicative of loss of bolting preload for closure bolting in each of these wet environments and their associated systems.

Palo Verde Nuclear Generating Station, Units 1, 2, and 3 cc:

Mr. Steve Olea Mr. John C. Taylor, Director, Nuclear Arizona Corporation Commission Generation 1200 W. Washington Street El Paso Electric Company Phoenix, AZ 85007 340 E. Palm Lane, Suite 310 Phoenix, AZ 85004 Mr. Douglas Kent Porter, Senior Counsel Southern California Edison Company Mr. James Ray Law Department, Generation Resources Public Service Company of New Mexico P.O. Box 800 2401 Aztec NE, MS Z110 Rosemead, CA 91770 Albuquerque, NM 87107-4224 Senior Resident Inspector Mr. Geoffrey M. Cook U.S. Nuclear Regulatory Commission Southern California Edison Company P.O. Box 40 5000 Pacific Coast Highway, Bldg. D21 Buckeye, AZ 85326 San Clemente, CA 92672 Regional Administrator, Region IV Mr. Robert Henry U.S. Nuclear Regulatory Commission Salt River Project 612 E. Lamar Blvd., Suite 400 6504 E. Thomas Road Arlington, TX 76011-4125 Scottsdale, AZ 85251 Chairman Mr. Jeffrey T. Weikert Maricopa County Board of Supervisors Assistant General Counsel 301 W. Jefferson, 10th Floor El Paso Electric Company Phoenix, AZ 85003 Mail Location 167 123 W. Mills Mr. Aubrey V. Godwin, Director El Paso, TX 79901 Arizona Radiation Regulatory Agency 4814 S. 40th Street Mr. Eric Tharp Phoenix, AZ 85040 Los Angeles Department of Water & Power Southern California Public Power Authority Mr. Scott Bauer, Director P.O. Box 51111, Room 1255-C Regulatory Affairs Los Angeles, CA 90051-0100 Palo Verde Nuclear Generating Station Mail Station 7636 Mr. Brian Almon P.O. Box 52034 Public Utility Commission Phoenix, AZ 85072-2034 William B. Travis Building P.O. Box 13326 Mr. Dwight C. Mims, Vice President 1701 N. Congress Avenue Regulatory Affairs and Plant Improvement Austin, TX 78701-3326 Palo Verde Nuclear Generating Station Mail Station 7605 P.O. Box 52034 Phoenix, AZ 85072-2034

Palo Verde Nuclear Generating Station, Units 1, 2, and 3 cc:

Mr. Randall K. Edington Executive Vice President Nuclear/CNO Arizona Public Service Company P.O. Box 52034, Mail Station 7602 Phoenix, AZ 85072-2034