ML073190286

Request for Additional Information Re LAR 07-006 to Revise Technical Specifications to Reflect Cycle-Specific Safety Analysis Assumptions Regarding Adoption of W* Methodologies

ML073190286
Person / Time
Site:	Comanche Peak
Issue date:	11/19/2007
From:	Balwant Singal NRC/NRR/ADRO/DORL/LPLIV
To:	Blevins M Luminant Generation Co
Singal, Balwant, 415-3016, NRR/DORL/LPL4
References
TAC MD6561, TAC MD6562
Download: ML073190286 (6)

Text

November 19, 2007 Mr. M. R. Blevins Executive Vice President

& Chief Nuclear Officer Luminant Generation Company LLC ATTN: Regulatory Affairs P. O. Box 1002 6322 North FM 56 Glen Rose, TX 76043

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION RE LICENSE AMENDMENT REQUEST (LAR)07-006 TO REVISE TECHNICAL SPECIFICATIONS TO REFLECT CYCLE-SPECIFIC SAFETY ANALYSIS ASSUMPTIONS RE ADOPTION OF W*

METHODOLOGIES (TAC NOS. MD6561 AND MD6562)

Dear Mr. Blevins:

By letter to the U.S. Nuclear Regulatory Commission (NRC) dated August 16, 2007, TXU Generation Company LP (subsequently renamed Luminant Generation Company LLC) submitted Technical Specification (TS) changes to reflect the results of the cycle-specific safety analysis for Comanche Peak Steam Electric Station, Units 1 and 2 for NRC review in accordance with Title 10 of the Code of Federal Regulations (10 CFR) Section 50.90.

The NRC Instrumentation and Controls Branch has completed its review of your application and has determined that additional information is required to complete the review. The specific information requested is addressed in the enclosure to this letter. You are requested to respond to the request for additional information (RAI) within 30 days from the issuance of this letter.

Please note that the NRC Reactor Systems Branch is also reviewing your application and may request additional information at a later date.

The NRC staff considers that timely responses to RAIs help ensure sufficient time is available for NRC staff to complete its review and contribute toward the NRCs goal of efficient and effective use of staff resources.

M. R. Blevins If you have any questions, please contact me at (301) 415-3016.

Sincerely,

/RA/

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

Enclosure:

Request for Additional Information cc w/encl: See next page

M. R. Blevins If you have any questions, please contact me at (301) 415-3016.

Sincerely,

/RA/

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

Enclosure:

Request for Additional Information cc w/encl: See next page DISTRIBUTION:

PUBLIC RidsNrrDorlLpl4 RidsRgn4MailCenter LPL4 R/F RidsNrrLAJBurkhardt KScales, NRR RidsAcrsAcnwMailCenter RidsNrrPMBSingal BMarcus, NRR RidsNrrDeEicb RidsNrrDorlDpr RidsNrrDssSrsb RidsOgcRp ADAMS Accession Number: ML073190286 *email dated OFFICE LPL4/PM LPL4/LA EICB/BC LPL4/BC NAME BSingal JBurkhardt WKemper* THiltz, JND for DATE 11/19/07 11/19/07 11/8/07 11/19/07 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION RELATED TO REVIEW ASSOCIATED WITH TECHNICAL SPECIFICATION CHANGES TO REFLECT THE RESULTS OF THE CYCLE-SPECIFIC SAFETY ANALYSIS LUMINANT GENERATION COMPANY LLC COMANCHE PEAK STEAM ELECTRIC STATION, UNITS 1 AND 2 DOCKET NOS. 50-445 AND 50-446 The License Amendment Request 07-006 proposes Technical Specification (TS) changes associated with Reactor Trip System Instrumentation (Table 3.3.1-1) and Engineered Safety Feature Actuation System Instrumentation (Table 3.3.2-1) Allowable Values for Comanche Peak Steam Electric Station, Units 1 and 2. To support the U.S. Nuclear Regulatory Commission's assessment of the acceptability of these changes, you are requested to provide the following additional information:

1. For the changes to the Allowable Values in TS Tables 3.3.1-1 and 3.3.2-1, provide the following information:

Setpoint Calculation Methodology: Provide documentation (including sample calculations) of the methodology used for establishing the limiting setpoint (or NSP) and the limiting acceptable values for the As-Found and As-Left setpoints as measured in periodic surveillance testing as described below. Indicate the related Analytical Limits and other limiting design values (and the sources of these values) for each setpoint.

2. For the Functional Unit 14, Steam Generator Water Level Low-Low, Table 3.3.1-1, Reactor Trip System Instrumentation, the Narrow Range Instrument Span (Unit 2) was revised to 34.9 percent. Explain why notes (q) and (r) are not applicable.

3. For the Functional Unit 5b, Steam Generator Water Level-High High (P14),

Table 3.3.2-1, Engineered Safety Features Actuation System Instrumentation, the Narrow Range Span (Unit 2) was revised to 82.0 percent. Explain why notes (q) and (r) are not applicable.

4. For the Functional Unit 6c, Steam Generator Water Level Low-Low, Table 3.3.2-1, Engineered Safety Features Actuation System Instrumentation, the Narrow Range Span (Unit 2) was revised to 34.9 percent. Explain why notes (q) and (r) are not applicable.

Comanche Peak Steam Electric Station cc:

Senior Resident Inspector Mr. Richard A. Ratliff, Chief U.S. Nuclear Regulatory Commission Bureau of Radiation Control P.O. Box 2159 Texas Department of Health Glen Rose, TX 76403-2159 1100 West 49th Street Austin, TX 78756-3189 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Mr. Brian Almon 611 Ryan Plaza Drive, Suite 400 Public Utility Commission Arlington, TX 76011 William B. Travis Building P.O. Box 13326 Mr. Fred W. Madden, Director 1701 North Congress Avenue Regulatory Affairs Austin, TX 78701-3326 Luminant Generation Company LLC P.O. Box 1002 Ms. Susan M. Jablonski Glen Rose, TX 76043 Office of Permitting, Remediation and Registration Timothy P. Matthews, Esq. Texas Commission on Environmental Morgan Lewis Quality 1111 Pennsylvania Avenue, NW MC-122 Washington, DC 20004 P.O. Box 13087 Austin, TX 78711-3087 County Judge P.O. Box 851 Mr. Anthony P. Jones Glen Rose, TX 76043 Chief Boiler Inspector Texas Department of Licensing Environmental and Natural and Regulation Resources Policy Director Boiler Division Office of the Governor E.O. Thompson State Office Building P.O. Box 12428 P.O. Box 12157 Austin, TX 78711-3189 Austin, TX 78711 October 2007