CP-200800901, Supplement to Response to NRC Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors

Supplement to Response to NRC Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors

ML082520253
Person / Time
Site:	Comanche Peak
Issue date:	08/28/2008
From:	Blevins M Luminant Generation Co, Luminant Power
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CP-200800901, GL-04-002, TXX-08095
Download: ML082520253 (3)

Text

Mike Blevins Luminant Power Executive Vice President P 0 Box 1002 M

& Chief Nuclear Officer 6322 North FM 56 11 Mike.Blevins@Luminant.com Glen Rose, TX 76043 1!1'ý'_111 F-M-1 H'ý T 254 897 5209 C 817 559 9085 F 254 897 6652 CP-200800901 Ref. # GL 2004-02 Log # TXX-08095 August 28, 2008 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC .20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION DOCKET NOS. 50-445 AND 50-446 SUPPLEMENT TO RESPONSE TO NRC GENERIC LETTER (GL) 2004-02, "POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY RECIRCULATION DURING DESIGN BASIS ACCIDENTS AT PRESSURIZED-WATER REACTORS"

REFERENCE:

1. Letter Logged TXX-05047 from M. Blevins to the NRC dated March 7,2005, providing a 90-day response to NRC Generic Letter 2004-02. (ML050740365)

2. Letter Logged TXX-05162 from M. Blevins to the NRC dated September 1, 2005, providing a response to requested information part 2 of NRC Generic Letter 2004-02.

(ML052550052)

3. Letter dated November 8, 2007, from William H. Ruland, Director, Division of Safety Systems, Office of Nuclear Reactor Regulation to Mr. Anthony R. Pietrangelo, Nuclear Energy Institute (NEI) regarding, Plant-Specific requests for extension of time to complete one or more corrective actions for Generic Letter (GL) 2004-02.

(ML073060581)

4. Letter Logged TXX-03130 from C. L. Terry to the NRC dated August 8, 2003, providing a response to NRC BULLETIN 2003-01. (ML032270437)

5. Letter Logged TXX-07164 from M. Blevins to the NRC dated December 3; 2007, providing a supplemental response to NRC Generic Letter (GL) 2004-02.

(ML073450888)

6. Letter Logged TXX-08033 from M. Blevins to the NRC dated February 29, 2008, providing a supplemental response to NRC Generic Letter (GL) 2004-02.

(ML080660596)

Dear Sir or Madam:

Luminant Generation Company LLC (Luminant Power) has completed all required corrective actions in support of resolution of Nuclear Regulatory Commission (NRC) Generic Letter (GL) 2004-02.

All required design modifications and testing have been completed.

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

• Comanche Peak

• Diablo Canyon

• Palo Verde

• San Onofre

• South Texas Project - Wolf Creek A-ny

U. S. Nuclear Regulatory Commission TXX-08095 Page 2 August 28, 2008 Lurmiant Power has also completed the analysis of the susceptibility of the Emergency Core Cooling System (ECCS) and Containment Spray System (CSS) recirculation functions for Comanche Peak Units 1 and 2. The methodology used conforms to the intent of NEI 04-07, "Pressurized Water Reactor Sump Performance Evaluation Methodology." The ECCS and CSS recirculation functions under debris loading conditions have been demonstrated by a combination of analysis and testing which provide the basis to show compliance with the applicable regulatory requirements including 10 CFR 50.46 and 10 CFR 50 Appendix A, General Design Criteria 35 and 38.

This letter documents completion of the two remaining licensing commitments regarding GL 2004-02 for Comanche Peak Units 1 and 2.

Description of Commitment 27330 In response to the request for information in Part 1 of Generic Letter (completed) 2004-02, CPNPP has substantially completed an analysis of the susceptibility of the ECCS and CSS recirculation functions for CPNPP Units 1 and 2., The methodology used will conform to the intent of NEI 04-07, "Pressurized Water Reactor Sump Performance Evaluation Methodology." The analyses when fully completed will provide the basis to show compliance with the applicable regulatory requirements including 10 CFR 50.46 and 10 CFR 50 Appendix A, General Design Criteria 35 and 38. The final analysis is scheduled to be completed by August 31, 2008.

27369 The Emergency Core Cooling System (ECCS) and Containment Spray System (completed) (CSS) recirculation functions under debris loading conditions at Comanche Peak Nuclear Power Plant (CPNPP) Units 1 and 2 will be in compliance with the regulatory requirements listed in the Applicable Regulatory Requirements section of Generic Letter 2004-02 by August 31, 2008.

Luminant Power will update engineering report ER-ESP-001, "Generic Letter 2004-02 Supplemental Response (Luminant Power's Update to the Modifications and Maintenance Actions for Resolution of GL 2004-02)" provided in reference 6 by November 26, 2008.

This letter contains the following new licensing commitments regarding Comanche Peak Units 1 and 2.

3582478 Luminant Power will update engineering report ER-ESP-001, "Generic Letter 2004-02 Supplemental Response (Luminant Power's Update to the Modifications and Maintenance Actions for Resolution of GL 2004-02)"

provided in reference 6 by November 26, 2008.

U. S. Nuclear Regulatory Commission TXX-08095 Page 3 August 28, 2008 Should you have any questions, please contact Mr. J. D. Seawright at (254) 897-0140.

I state under penalty of perjury that the foregoing is true and correct.

Executedon August 28, 2008..

Sincerely, Luminant Generation Company LLC Mike Blevins By: 27724

'red W. Madden

/ Director, Oversight & Regulatory Affairs c- E. E. Collins, Region IV B. K. Singal, NRR Resident Inspectors, Comanche Peak