ML13301A645

Redacted, Request for Additional Information, Amendment Request to Revise TS 3.7.16, Fuel Storage Pool Boron Concentration, TS 3.7.17, Spent Fuel Assembly Storage, and TS 5.5, Programs and Manuals

ML13301A645
Person / Time
Site:	Comanche Peak
Issue date:	11/05/2013
From:	Balwant Singal Plant Licensing Branch IV
To:	Flores R Luminant Generation Co
Singal B
References
TAC MF1365, TAC MF1366
Download: ML13301A645 (6)

Text

OffiCIAL USI! ONLY PROPRIETARY INFORMATION UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555.()001 November S, 2013 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 -REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION TO TECHNICAL SPECIFICATIONS 3.7.16, "FUEL STORAGE POOL BORON CONCENTRATION," 3.7.17, "SPENT FUEL ASSEMBLY STORAGE," 4.3, "FUEL STORAGE," AND "5.5, "PROGRAMS AND MANUALS" (TAC NOS.

MF1365 AND MF1366)

Dear Mr. Flores:

By letter dated March 28, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML130950023), as supplemented by letter dated July 16, 2013 (ADAMS Accession No. ML13205A056), Luminant Generation Company LLC (the licensee) submitted a license amendment request for revision to the Facility Operating License Nos. NPF-87 and NPF-89 for Comanche Peak Nuclear Power Plant (CPNPP), Units 1 and 2, respectively. The amendment also seeks revision of the CPNPP, Units 1 and 2, Technical Specifications based on an updated criticality analysis methodology for the spent fuel pool.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the information provided in your application and determined that additional information is required in order to complete its review. A draft copy of the enclosed request for additional information (RAI) was provided to Mr. Jimmy Seawright of your staff via e-mail on October 9, 2013. He informed the NRC on October 22, 2013, that a conference call to discuss the RAis is not needed and agreed to provide the RAI responses within 30 days from the date of this letter. Enclosure 1 to this letter is the proprietary version of the RAis and Enclosure 2 is a non-proprietary version of the RAis.

Please note that the NRC staff is developing an additional set of RAis which will be provided in separate letter. transmitted herewith contains Proprietary information. When separated from , this document is decontrolled.

OFFICIAL USE ONLY PROPRIETARY INFORMATION

OFFICIAL USE ONLY PROPRIETARY INFORMATION R. Flores If you have any questions, please contact me at 301-415-3016 or balwant.singal@nrc.gov.

Sincerely,

~--t~~~

Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446

Enclosures:

1. RAI (proprietary)

2. RAI (non-proprietary) cc w/Encl 2: Distribution via Listserv OFFICIAL USE ONLY PROPRIETARY INfORMATION

ENCLOSURE 2 (NON-PROPRIETARY)

REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION TO TECHNICAL SPECIFICATIONS 3.7.16, "FUEL STORAGE POOL BORON CONCENTRATION." 3.7.17, "SPENT FUEL ASSEMBLY STORAGE," 4.3. "FUEL STORAGE."

AND "5.5. "PROGRAMS AND MANUALS" LUMINANT GENERATION COMPANY LLC COMANCHE PEAK NUCLEAR POWER PLANT. UNITS 1 AND 2 DOCKET NOS. 50-445 AND 50-446

O~FICIAI.. USE ONlY PROPRIETARY INFORMATION REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION TO TECHNICAL SPECIFICATION$ 3.7. 16. YFUEL $TO~GE POOL BORON CONCENTAATION." 3.7.17, ~SPENT FUEL ASSEMBLY STORAGE." 4.3. MFUEL STORAGE."

AND "5.5. "PROGRAMS AND MANUALS" LUMINANT GENERATION COMPANY LLC COMANCHE PEAK NUCLEAR POWER PLANT. UNIT$ 1 AND 2 DOCKET NOS. 50-445 AND 50-446 By letter dated March 28, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML130950023), as supplemented by letter dated July 16, 2013 (ADAMS Accession No. Ml13205A056), Luminant Generation Company LLC (the licensee) submitted a Hcense amendment request for revision to the FaciHty Operating License Nos. NPF-87 and NPF-89 for Comanche Peak Nuclear Power Plant (CPNPP), Units 1 and 2, respectively (CPNPP). The amendment also seeks revision of the CPNPP, Units 1 and 2, Technical Specifications based on an updated criticality analysis methodology for the spent fuel pool.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the Information provided in your application and determined that the following additional information is required in order to complete its review.

1. In Enclosure 1 to TXX-13045, Section 4, it states that UCPNPP will establish a Boral coupon surveillance program." The NRC staff would like clarifiCation of this statement including:

a. Please discuss when the program will be established and Implemented.

b. Please discuss whether there are any other previous surveillance results and, if so, provide a summary of them.

2. As part of the criticality analysis, WCAP-17728-P, blisters were evaluated. The WCAP states that at a ([ ]) the racks would maintain their functionality. The NRC staff has also reviewed the Boral coupon surveillance program and the monitoring program for the blisters is not apparent. Please discuss whether the program will monitor blisters and trend any blister formation or increase in blister size.

Also, if they are being monitored, please discuss the acceptance aiteria for the height of the blisters.

3. In proposed TS 5.5.22 (in Attachment 2 to TXX-13045 on page 18/18 and Attachment 4 to TXX-13045 on page 17/18), the thickness criteria for the Boral coupons is: "An increase in thickness at any point is greater than 25% of the initial thickness at that point.* The NRC staff would like clarification of this statement including:

OFFICIAl. YSE ONlY PROPRIETARY INFORMATION

OFFICIAl USE OHlY PROPRIETARY INFORMATION

a. Please discuss whether the initial coupon thicknesses are at least 25 percent less than the thickness listed in the criticality analysis.

b. Please define what is meant by thickness. Does this Include the thickness/height of the blister?

c. Please justify why the 25 percent increase in thickness is acceptable.

4. In Enclosure 1 to TXX-13045, Section 4, there is discussion about having enough coupons to cover the current operating license and license renewal. The spent fuel pool, however, will be inservice beyond the operating license and be used when the reactor is defueled. In this case, the spent fuel pool, and thereby the Bora!, will still be inservice past the operating and license renewal period. Please discuss whether there will be enough coupons to monitor the Boral until the end of the spent fuel pool life (when the spent fuel pool is permanently defueled).

5. Please discuss whether the racks and coupons are vented. If so, discuss whether the coupon wnts are representative of the rack vents.

6. In Attachment 3 to TXX-13045 on page 9118, the proposed TS bases, B 3.7.16, Background, states "The neutron absorber material Boral is credited for the storage of spent fuel assemblies within Region 1 racks to maintain K..r less than or equal to 1.0 at 0 ppm [parts per million) soluble boron concentration." The NRC staff needs clarification on this statement including:

a. Please discuss whether or not the Boral material is credited in the borated case.

This information is not mentioned in the background.

b. Please clarify why it is necessary to *maintain 1<.1 less than or equal to 1.0" when the regulations state that K..r in the non-borated case should be less than 1.0.

There is no provision for Ken to be equal to 1.0.

1. Please confirm that in Attachment 6 to TXX-13045 on page 8/8 in Table 9.1-4 that the second and third column title should be U1 Discharged and U2 Discharged, respectively.

8. Please confirm that on [(

n.

9. Please confirm that [( ]) is the nominal areal density and that

(( JJ is the minimum certified areal density.

OFF&CIAl USE ONLY PROPRtETARY INFORMATION

OFFICIAL USE ONLY PROPRIETARY INFORMATION A. Flores If you have any questions, please contact me at 301-415-3016 or balwant.singal@nrc.gov.

Sincerely, IRA/

Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446

Enclosures:

1. RAJ (proprietary)

2. RAJ (non-proprietary) cc w/Encl2: Distribution via Listserv DISTRIBUTION:

PUBLIC RidsNrrPMComanchePeak Resource LPLIV r/f RidsNrrLAJBurkhardt Resource RidsAcrsAcnw_MaiiCTR Resource RidsRgn4MaiiCenter Resource RidsNrrDorllpl4 Resource EWong, NRR/DEIESGB RidsNrrDeEsgb Resource OFFICE ADAMS A ccess1on Nos.: p ropnetary ML13297A162 Non- Propne . tary Ml13301A645 NRR/DORULPL4/PM NRRIDORULPL4/PM NRR/DORULPL4/LA NAME MBartlett BSingal JBurkhardt DATE 10/30/13 10/31/13 10/29/13 OFFICE NRR/DEIESGB/BC NRRIDORULPL4/BC NRRIDORULPL4/PM NAME GKulesa* MMarkley BSingal DATE 10/9/13 11/5/13 11/5/13 OFFICIAL RECORD COPY OFFICIAL USE ONLY PROPRIETARY INFORMATION