ML14153A020

Review of Steam Generator Tube Inspection Report for 16th Refueling Outage

ML14153A020
Person / Time
Site:	Comanche Peak
Issue date:	06/09/2014
From:	Balwant Singal Plant Licensing Branch IV
To:	Flores R Luminant Generation Co
Singal B
References
TAC MF2902
Download: ML14153A020 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 9, 2014 Mr. Rafael Flores Senior Vice President and Chief Nuclear Officer Attention: Regulatory Affairs Luminant Generation Company LLC P.O. Box 1002 Glen Rose, TX 76043

SUBJECT:

COMANCHE PEAK NUCLEAR POWER PLANT, UNIT 1 -REVIEW OF THE 2013 STEAM GENERATOR INSPECTIONS DURING REFUELING OUTAGE 16 (TAC NO. MF2902)

Dear Mr. Flores:

By letter dated October 15, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13304A711), Luminant Generation Company, LLC (the licensee),

submitted information summarizing the results of the 2013 steam generator inspections performed at the Comanche Peak Nuclear Power Plant (CPNPP), Unit 1, during refueling outage 16.

The U.S. Nuclear Regulatory Commission (NRC) staff has completed its review of the submittal and concludes that the licensee provided the information required by the CPNPP, Unit 1, technical specifications. No additional follow-up is required at this time. The results of the NRC staff's review and observations are enclosed.

If you have any questions, please contact me at (301) 415-3016 or via e-mail at balwant.singal@nrc.gov.

Sincerely, Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-445

Enclosure:

As stated cc w/encl: Distribution via Listserv

REVIEW OF THE 2013 STEAM GENERATOR INSPECTIONS LUMINANT GENERATION COMPANY LLC COMANCHE PEAK NUCLEAR POWER PLANT, UNIT 1 DOCKET NO. 50-445 By letter dated October 15, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13304A711), Luminant Generation Company, LLC (the licensee),

submitted information summarizing the results of the 2013 steam generator (SG) inspections performed at the Comanche Peak Nuclear Power Plant (CPNPP), Unit 1, during refueling outage 16.

CPNPP, Unit 1 has four Westinghouse Model Delta 76 SGs. Each steam generator contains 5,532 thermally treated Alloy 690 tubes. Each tube has a nominal outside diameter of

0. 750 inches and a nominal wall thickness of 0.043 inches; except for the row 1 and 2 tubes, which have a nominal wall thickness of 0.044 inches. The tubes were hydraulically expanded at both ends for the full depth of the tubesheet. The tubes are supported by four sets of stainless steel anti-vibration bars (AVBs) and 10 stainless steel tube support plates (TSPs ). Both the AVBs and TSPs are made of Type 405 stainless steel.

The licensee provided the scope, extent, methods, and results of its SG tube inspections in the document referenced above. In addition, the licensee described corrective actions, such as tube plugging, taken in response to the inspection findings.

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 its technical specifications. In addition, the staff concludes 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 the inspection results appear to be consistent with industry operating experience at similarly designed and operated units.

Enclosure

June 9, 2014 Mr. Rafael Flores Senior Vice President and Chief Nuclear Officer Attention: Regulatory Affairs Luminant Generation Company LLC P.O. Box 1002 Glen Rose, TX 76043

SUBJECT:

COMANCHE PEAK NUCLEAR POWER PLANT, UNIT 1 -REVIEW OF THE 2013 STEAM GENERATOR INSPECTIONS DURING REFUELING OUTAGE 16 (TAC NO. MF2902)

Dear Mr. Flores:

By letter dated October 15, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13304A711), Luminant Generation Company, LLC (the licensee),

submitted information summarizing the results of the 2013 steam generator inspections performed at the Comanche Peak Nuclear Power Plant (CPNPP), Unit 1, during refueling outage 16.

The U.S. Nuclear Regulatory Commission (NRC) staff has completed its review of the submittal and concludes that the licensee provided the information required by the CPNPP, Unit 1, technical specifications. No additional follow-up is required at this time. The results of the NRC staffs review and observations are enclosed.

If you have any questions, please contact me at (301) 415-3016 or via e-mail at balwant. singal@nrc.gov.

Sincerely, IRA by PBamford for/

Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-445

Enclosure:

As stated cc w/encl: Distribution via Listserv DISTRIBUTION:

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OFFICE NRRIDORULPL4-1/PM NRRIDORULPL4-1/PM NRRIDORULPL4-1/LA NAME SGoetz BSingal (PBamford for) JBurkhardt DATE 6/5/14 6/9/14 6/2/14 OFFICE NRR/DE/ESGB/BC* NRRIDORULPL4-1/BC NRRIDORULPL4-1/PM NAME GKulesa MMarkley (PBamford for) BSingal (PBamford for)

DATE 5/21/14 6/9/14 6/9/14 OFFICIAL AGENCY RECORD