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{{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 4, 2015 Mr. Randall K. Edington Executive Vice President Nuclear/ | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 4, 2015 Mr. Randall K. Edington Executive Vice President Nuclear/ | ||
Chief Nuclear Officer Mail Station 7602 Arizona Public Service Company P.O. Box 52034 Phoenix, AZ 85072-2034 | Chief Nuclear Officer Mail Station 7602 Arizona Public Service Company P.O. Box 52034 Phoenix, AZ 85072-2034 | ||
==SUBJECT:== | ==SUBJECT:== | ||
PALO VERDE NUCLEAR GENERATING STATION, UNIT 3 - REVIEW OF THE STEAM GENERATOR TUBE INSPECTION REPORT FOR THE SPRING 2015 REFUELING OUTAGE (CAC NO. MF6761) | PALO VERDE NUCLEAR GENERATING STATION, UNIT 3 - REVIEW OF THE STEAM GENERATOR TUBE INSPECTION REPORT FOR THE SPRING 2015 REFUELING OUTAGE (CAC NO. MF6761) | ||
==Dear Mr. Edington:== | ==Dear Mr. Edington:== | ||
By {{letter dated|date=September 23, 2015|text=letter dated September 23, 2015}} (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15267A269), Arizona Public Service Company (the licensee) submitted information summarizing the results of the spring 2015 steam generator (SG) tube inspections at the Palo Verde Nuclear Generating Station (PVNGS), Unit 3. These inspections were performed during the 1 ath refueling outage of Unit 3. | |||
By letter dated September 23, 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15267A269), Arizona Public Service Company (the licensee) submitted information summarizing the results of the spring 2015 steam generator (SG) tube inspections at the Palo Verde Nuclear Generating Station (PVNGS), Unit 3. These inspections were performed during the | |||
The U.S. Nuclear Regulatory Commission (NRC) staff has completed its review of the information and concludes that the licensee has provided the information required by the PVNGS, Unit 3 Technical Specifications. No additional follow-up is necessary at this time. The NRC staff's review ofthe SG tube inspection report is enclosed. | The U.S. Nuclear Regulatory Commission (NRC) staff has completed its review of the information and concludes that the licensee has provided the information required by the PVNGS, Unit 3 Technical Specifications. No additional follow-up is necessary at this time. The NRC staff's review ofthe SG tube inspection report is enclosed. | ||
If you have any questions, please contact me at (301) 415-1233 or via e-mail at Margaret.Watford@nrc.gov. | If you have any questions, please contact me at (301) 415-1233 or via e-mail at Margaret.Watford@nrc.gov. | ||
Docket No. STN 50-530 | |||
==Enclosure:== | ==Enclosure:== | ||
Review of the Results of the Spring 2015 Steam Generator Tube Inspections cc w/encl: Distribution via Listserv Sincerely, rnw~ | |||
Margaret M. Watford, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation | |||
REVIEW OF RESULTS OF THE SPRING 2015 STEAM GENERATOR TUBE INSPECTIONS ARIZONA PUBLIC SERVICE COMPANY PALO VERDE NUCLEAR GENERATING STATION, UNIT 3 DOCKET NO. STN 50-530 By {{letter dated|date=September 23, 2015|text=letter dated September 23, 2015}} (Agencywide Documents Access and Management System Accession No. ML15267A269), Arizona Public Service Company (the licensee) submitted information summarizing the results of the spring 2015 steam generator (SG) tube inspections at the Palo Verde Nuclear Generating Station (PVNGS), Unit 3. These inspections were performed during the 181h refueling outage of Unit 3. | |||
REVIEW OF RESULTS OF THE SPRING 2015 STEAM GENERATOR TUBE INSPECTIONS ARIZONA PUBLIC SERVICE COMPANY PALO VERDE NUCLEAR GENERATING STATION, UNIT 3 DOCKET NO. STN 50-530 By letter dated September 23, 2015 (Agencywide Documents Access and Management System Accession No. ML15267A269), Arizona Public Service Company (the licensee) submitted information summarizing the results of the spring 2015 steam generator (SG) tube inspections at the Palo Verde Nuclear Generating Station (PVNGS), Unit 3. These inspections were performed during the 181h refueling outage of Unit 3. | |||
PVNGS, Unit 3, has two replacement SGs manufactured by Ansaldo. Each SG has 12,580 thermally treated Alloy 690 tubes with an outside diameter of 0.750 inches and a wall thickness of 0.042 inches. Ferritic stainless steel eggcrate tube supports, diagonal bars, and vertical straps support the tubes at various locations. | PVNGS, Unit 3, has two replacement SGs manufactured by Ansaldo. Each SG has 12,580 thermally treated Alloy 690 tubes with an outside diameter of 0.750 inches and a wall thickness of 0.042 inches. Ferritic stainless steel eggcrate tube supports, diagonal bars, and vertical straps support the tubes at various locations. | ||
The licensee provided the scope, extent, methods, and results of its SG tube inspections in the document referenced above. In addition, the licensee described the corrective actions (i.e., | The licensee provided the scope, extent, methods, and results of its SG tube inspections in the document referenced above. In addition, the licensee described the corrective actions (i.e., | ||
tube plugging) taken in response to the inspection findings. | tube plugging) taken in response to the inspection findings. | ||
The following observations are noted in regard to the licensee's 2015 inspections: | The following observations are noted in regard to the licensee's 2015 inspections: | ||
Two steam separators were slightly tilted and in contact with adjacent drain lines. | |||
The tilted separators' Marmon clamps were inspected and found to be secure with acceptable bolted connections. Furthermore, both of the tilted steam separators were secure and not loosened. The tilted steam separators are not considered a tube integrity concern and will be evaluated under PVNGS's Engineering Work Request process. | The tilted separators' Marmon clamps were inspected and found to be secure with acceptable bolted connections. Furthermore, both of the tilted steam separators were secure and not loosened. The tilted steam separators are not considered a tube integrity concern and will be evaluated under PVNGS's Engineering Work Request process. | ||
Based on a review of the information provided, the U.S. Nuclear Regulatory Commission (NRC) staff concludes that the licensee provided the information required by the PVNGS, Unit 3, technical specifications. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action at this time since the inspections appear to be consistent with the objective of detecting potential tube degradation, and inspection results appear to be consistent with industry operating experience at similarly designed and operated units. | Based on a review of the information provided, the U.S. Nuclear Regulatory Commission (NRC) staff concludes that the licensee provided the information required by the PVNGS, Unit 3, technical specifications. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action at this time since the inspections appear to be consistent with the objective of detecting potential tube degradation, and inspection results appear to be consistent with industry operating experience at similarly designed and operated units. | ||
Enclosure | Enclosure | ||
ML15281A202 | ML15281A202 OFFICE NRR/DORULPL4-1 /PM NRR/DORULPL4-1 /LA NRR/DE/ESGB/BC NAME MWatford JBurkhardt GKulesa* | ||
DATE 11/2/15 11/2/15 10/8/15}} | |||
Latest revision as of 06:46, 10 January 2025
| ML15306A259 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 11/04/2015 |
| From: | Watford M Plant Licensing Branch IV |
| To: | Edington R Arizona Public Service Co |
| Watford M | |
| References | |
| CAC MF6761 | |
| Download: ML15306A259 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 4, 2015 Mr. Randall K. Edington Executive Vice President Nuclear/
Chief Nuclear Officer Mail Station 7602 Arizona Public Service Company P.O. Box 52034 Phoenix, AZ 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNIT 3 - REVIEW OF THE STEAM GENERATOR TUBE INSPECTION REPORT FOR THE SPRING 2015 REFUELING OUTAGE (CAC NO. MF6761)
Dear Mr. Edington:
By letter dated September 23, 2015 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML15267A269), Arizona Public Service Company (the licensee) submitted information summarizing the results of the spring 2015 steam generator (SG) tube inspections at the Palo Verde Nuclear Generating Station (PVNGS), Unit 3. These inspections were performed during the 1 ath refueling outage of Unit 3.
The U.S. Nuclear Regulatory Commission (NRC) staff has completed its review of the information and concludes that the licensee has provided the information required by the PVNGS, Unit 3 Technical Specifications. No additional follow-up is necessary at this time. The NRC staff's review ofthe SG tube inspection report is enclosed.
If you have any questions, please contact me at (301) 415-1233 or via e-mail at Margaret.Watford@nrc.gov.
Docket No. STN 50-530
Enclosure:
Review of the Results of the Spring 2015 Steam Generator Tube Inspections cc w/encl: Distribution via Listserv Sincerely, rnw~
Margaret M. Watford, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
REVIEW OF RESULTS OF THE SPRING 2015 STEAM GENERATOR TUBE INSPECTIONS ARIZONA PUBLIC SERVICE COMPANY PALO VERDE NUCLEAR GENERATING STATION, UNIT 3 DOCKET NO. STN 50-530 By letter dated September 23, 2015 (Agencywide Documents Access and Management System Accession No. ML15267A269), Arizona Public Service Company (the licensee) submitted information summarizing the results of the spring 2015 steam generator (SG) tube inspections at the Palo Verde Nuclear Generating Station (PVNGS), Unit 3. These inspections were performed during the 181h refueling outage of Unit 3.
PVNGS, Unit 3, has two replacement SGs manufactured by Ansaldo. Each SG has 12,580 thermally treated Alloy 690 tubes with an outside diameter of 0.750 inches and a wall thickness of 0.042 inches. Ferritic stainless steel eggcrate tube supports, diagonal bars, and vertical straps support the tubes at various locations.
The licensee provided the scope, extent, methods, and results of its SG tube inspections in the document referenced above. In addition, the licensee described the corrective actions (i.e.,
tube plugging) taken in response to the inspection findings.
The following observations are noted in regard to the licensee's 2015 inspections:
Two steam separators were slightly tilted and in contact with adjacent drain lines.
The tilted separators' Marmon clamps were inspected and found to be secure with acceptable bolted connections. Furthermore, both of the tilted steam separators were secure and not loosened. The tilted steam separators are not considered a tube integrity concern and will be evaluated under PVNGS's Engineering Work Request process.
Based on a review of the information provided, the U.S. Nuclear Regulatory Commission (NRC) staff concludes that the licensee provided the information required by the PVNGS, Unit 3, technical specifications. In addition, the NRC staff concludes that there are no technical issues that warrant follow-up action at this time since the inspections appear to be consistent with the objective of detecting potential tube degradation, and inspection results appear to be consistent with industry operating experience at similarly designed and operated units.
Enclosure
ML15281A202 OFFICE NRR/DORULPL4-1 /PM NRR/DORULPL4-1 /LA NRR/DE/ESGB/BC NAME MWatford JBurkhardt GKulesa*
DATE 11/2/15 11/2/15 10/8/15