ML102660130

September 22, 2010, Summary of Teleconference Held Between U.S. NRC and Arizona Public Service Company, Concerning Buried Piping Aging Management for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3, LRA

ML102660130
Person / Time
Site:	Palo Verde
Issue date:	10/05/2010
From:	Lisa Regner License Renewal Projects Branch 2
To:
Regner L M, NRR/DLR, 415-1906
References
Download: ML102660130 (6)

Text

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

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON SEPTEMBER 22, 2010, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND ARIZONA PUBLIC SERVICE COMPANY, CONCERN ING BURIED PIPING AGING MANAGEMENT FOR 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 September 22, 2010, to discuss and clarify the staff's 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 staff's draft RAI.

Enclosure 1 provides a listing of the participants and Enclosure 2 contains a listing of the draft questions discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this Lisa M. Regner, Sr. Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regu lati on Docket Nos. 50-528, 50-529, and 50-530

Enclosures:

As stated cc w/encls: Distribution via Listserv

TELEPHONE CONFERENCE CALL PALO VERDE NUCLEAR GENERATING STATION , UNITS 1, 2, AND 3 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS SEPTEMBER 22, 2010 PARTICIPANT AFFILIATION Lisa Regner U.S. Nuclear Regulatory Commission (NRC)

William Holston NRC Angela Krainik Arizona Public Service Company (APS)

Glenn Michael APS Shabbir Pittalwala APS Dan Wittas APS Eric Blocher Strategic Teaming and Resource Sharing Alliance ENCLOSURE 1

DRAFT REQUESTS FOR ADDITIONAL INFORMATION PALO VERDE NUCLEAR GENERATING STATION, UNITS 1, 2, AND 3 LICENSE RENEWAL APPLICATION SEPTEMBER 22, 2010 The U.S. Nuclear Regulatory Commission (the staff) and representatives of Arizona Public Service Company (the applicant) held a telephone conference call on September 22, 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 Follow-up RAI B2.1.18-1

Background:

In supplemental responses to RAI B2.1 .18-1 dated June 21,2010, and July 21 , 2010, the applicant stated that, in addition to risk ranking of piping required by their commitment to the Nuclear Energy Institute (NEI) initiative on buried piping , they will excavate and visually inspect at least 10 feet of piping at the following locations: a) two inspections of stainless steel piping per unit, b) two inspections of cathodically protected steel piping per unit, and c) three inspections of fire protection piping with potentially degraded cathodic bonding straps during the period prior to extended operation and again during each 10 year period in the period of extended operation.

Issue:

The staff notes that buried steel piping is present in the essential spray pond , diesel fuel oil, domestic water, and fire protection systems. The staff also notes that buried fue l oil piping contains hazardous materials whereas the other systems typically contain non hazardous water.

The quality of backfill is a significant contributor to the avoidance of damage to coatings and piping without coatings. The staff also notes that the applicant found coating damage on the external surfaces of underground fire protection piping caused by abrasion from the bedding rock material, which exposed the piping to corrosive attack. The staff further notes that there is no docketed information on the quality of the backfill used during installation of the buried essential spray pond, diesel fuel oil, domestic water, and fire protection systems piping.

Request:

1. State whether the essential spray pond, domestic water or fire protection systems contain hazardous material (i.e., material that if released could be detrimental to the environment, including concentration of radioisotopes within the piping during normal operation which exceeds the Environmental Protection Agency drinking water standard).

2. State whether at least one inspection of in-scope buried piping containing diesel fuel oil will be conducted within the six inspections of carbon stee l piping being conducted onsite, and one inspection of piping in the essential spray pond, domestic water or fire protection systems if they contain hazardous material as defined in the above request, or justify why it is acceptable to not inspect in-scope buried pipe containing hazardous materials.

ENCLOSURE 2

2

3. Justify why backfill quality is considered adequate such that coatings and piping (without coatings) will not be damaged for the following systems: essential spray pond, diesel fuel oil and fire protection .

Discussion : Following discussion with the applicant, the staff has revised the request as follows. The applicant stated that it understands the question and will respond .

Request:

1. State whether the essential spray pond contains hazardous material.

2. State whether inspections of in-scope buried piping containing diesel fuel oil will be conducted within the six inspections of carbon steel piping being conducted onsite.

Also , if the essential spray pond contains hazardous material , state whether inspections of piping will be conducted .

3. Justify why backfill quality is adequate such that piping and piping coatings will not be damaged for the following systems: essential spray pond , diesel fuel oil and fire protection.

..* ML102660130 OFFICE LARPOB:DLR PM :RPB2:DLR BC:RPB2:DLR PM:RPB2:DLR NAME IKing LRegner DWrona LRegner (Signature) 09/24/10 09/27/10 09/28/10 10105/10 DATE Memorandum to Arizona Public Service Company from Lisa M. Regner dated October 5, 2010

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON SEPTEMBER 22 , 2010, BETWEEN THE U.S. NUCLEAR REGU LATORY COMMISSION AND ARIZONA PUBLIC SERVICE COMPANY, CONCERNING BURIED PIPING AGING MANAGEMENT FOR THE PALO VERDE NUCLEAR GENERATING STATION , UNITS 1,2, AND 3, LICENSE RENEWAL APPLICATION DISTRIBUTION:

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