ML14248A572

Correction to Figures Provided in Response to Request for Additional Information for License Amendment Nos. 160 and 160 Regarding Two 14-Day, One-Time Completion Times for Offsite Circuits

ML14248A572
Person / Time
Site:	Comanche Peak
Issue date:	09/15/2014
From:	Balwant Singal Plant Licensing Branch IV
To:	Flores R Luminant Generation Co
Singal B
References
TAC MF3480, TAC MF3481
Download: ML14248A572 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 September 15, 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, UNITS 1 AND 2-CORRECTION TO FIGURES PROVIDED IN RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION FOR LICENSE AMENDMENT REQUEST 12-007 REGARDING TWO, 14-DAY, ONE-TIME COMPLETION TIMES FOR OFFSITE CIRCUITS (TAC NOS. MF3480 AND MF3481)

Dear Mr. Flores:

By letter dated December 19, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13023A237), as supplemented by letter dated May 16, 2013 (ADAMS Accession No. ML13149A257), Luminant Generation Company LLC (Luminant, the licensee) submitted license amendment request (LAR)12-007 to revise Technical Specification (TS) 3.8.1, "AC [Alternating Current] Sources- Operating," to extend, on a one-time basis, an allowable completion time (CT) associated with restoration of an inoperable offsite circuit, from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 14 days (to be used twice) to install an additional startup transformer (XST) 1A. The U.S. Nuclear Regulatory Commission (NRC) staff issued Amendment No. 160 to Facility Operating License No. NPF-87 and Amendment No. 160 to Facility Operating License No. NPF-89 for Comanche Peak Nuclear Power Plant, Units 1 and 2, respectively, by letter dated September 18, 2013 (ADAMS Accession No. ML13232A143).

By letter dated February 13, 2014 (ADAMS Accession No. ML14057A804), the licensee informed the NRC staff that Figures 8.211, 8.2-11A, 8.3-1, 8.3-6, and Unit 2 Generator Layout one line diagram provided as part of the response to request for additional information by letter dated May 16, 2013, had minor inconsistencies. The nature of the inconsistencies are as described below:

Figure 8.2-11:

Figure 8.2-11 incorrectly shows transfer boxes CPX-EPTSST-04Y and CPX-EPTSST-05Y interfacing with XST2-X winding buses from Tap box 7 to Unit 2 switchgears 2EA1 and 2EA2, respectively. Figure 8.3-1 correctly shows transfer boxes CPX-EPTSST-04Y and CPX-EPTSST-05Y interfacing with Tap box 6 for XST1-Y winding buses to Unit 2 switchgears 2EA1 and 2EA2. In addition, Tap box 6 for XST1-Y winding was incorrectly shown in Unit 2 normal switchgear room on Figure 8.2-11 and this error could also have been identified if Figure 8.2-11, was reviewed against Figure 8.3-1.

R. Flores Figure 8.2-11A:

Corrected the cable bus location in relation to transfer box CPX-EPTSST-05Y.

Figure 8.3-1:

The dashed lines around the Eaton bus bars on Figure 8.3-1 denote the equipment is 1E but it is not.

Figures 8.3-6 for Units 1 and 2:

The dashed lines around the Alternate Power Diesel Generators (APDGs) on both Figures of 8.3-6 denote the equipment is 1E but it is not.

Unit 2 Generator Layout:

The Unit 2 Generator Layout one line diagram was missing an arrow pointing at the cables between the APDG set and the transformer with the words stating "5-1/C-#4/0 AWG CU CABLES PER PHASE" and the arrow pointing to the 5-inch conduit should have shown the words "1-1 /C-500 MCM" instead of the words "5-1/C-#4/0 AWG."

The licensee stated that inconsistencies did not have any impact on the no significant hazards consideration provided by letter dated December 19, 2012, and does not change the conclusions of the NRC's safety evaluation dated September 18, 2013.

The NRC staff evaluated the inconsistencies and the corrected figures provided by letter dated February 13, 2014, and determined that the corrections to the figures are related to incorrect identification of specific auxiliary component items of the switchyard system and do not affect the electrical system configuration and its performance. Hence, the NRC concludes that corrections to Figures 8.2-11, 8.2-11A, 8.3-1, 8.3-6, and Unit 2 Generator Layout one line diagram do not impact the conclusions of the NRC staff's safety evaluation transmitted by letter dated September 18, 2013, and those conclusions remain valid.

R. Flores If you have any questions, please call me at 301-415-3016 or via e-mail at Balwant. Sinqal@nrc.gov.

Sincerely, 5~~ c~,h:cY--

Balwant K. Singal, Senior Projeel Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446 cc: Distribution via Listserv

R. Flores If you have any questions, please call me at 301-415-3016 or via e-mail at Balwant.Singal@nrc.gov.

Sincerely, IRA/

Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446 cc: Distribution via Listserv DISTRIBUTION:

PUBLIC LPL4-1 Reading RidsAcrsAcnw MaiiCTR Resource RidsNrrDoriDpr Resource RidsNrrDorllpl4-1 Resource RidsNrrDeEeeb Resource RidsNrrLAJBurkhardt Resource RidsNrrPMComanchePeak Resource RidsRgn4MaiiCenter Resource SBasturescu, NRRIDE/EEEB ADAMS Accession No.: ML14248A572 OFFICE NRR/DORL/LPL4-1/PM NRRIDORL/LPL4-1/LA NRR/DORLILPL4-1/BC(A) NRRIDORLILPL4-1/PM NAME BSingal JBurkhardt EOesterle BSingal DATE 9/12/14 9/11/14 9/15/14 9/15/14 OFFICIAL AGENCY RECORD