ML073130055

Request for Additional Information (RAI) - Electrical Power Systems Technical Specification (TS) 3.8.1

ML073130055
Person / Time
Site:	Susquehanna
Issue date:	11/14/2007
From:	Richard Guzman NRC/NRR/ADRO/DORL/LPLI-1
To:	Mckinney B Susquehanna
Guzman R, NRR/DORL, 415-1030
References
TAC MD4766
Download: ML073130055 (5)

Text

November 14, 2007 Mr. Britt T. McKinney Sr. Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3 Berwick, PA 18603-0467

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) - SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 (SSES 1 AND 2) - ELECTRICAL POWER SYSTEMS TECHNICAL SPECIFICATION (TS) 3.8.1 (TAC NO.

MD4766)

Dear Mr. McKinney:

In reviewing your letter dated March 2, 2007, concerning your request to add a new ACTIONS Note 3 to Unit 2 TS 3.8.1 to allow a Unit 1 4160 volt subsystem to be de-energized and removed from service to perform bus maintenance, the Nuclear Regulatory Commission staff has determined that additional information contained in the enclosure to this letter is needed to complete its review. These questions were discussed with your staff during a teleconference on November 8, 2007. As agreed to by your staff, we request you respond by December 7, 2007.

If you have any questions, please contact me at 301-415-1030.

Sincerely,

/ra/

Richard V. Guzman, Senior Project Manager Plant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-387 and 50-388

Enclosure:

RAI cc w/encl: See next page

November 14, 2007 Mr. Britt T. McKinney Sr. Vice President and Chief Nuclear Officer PPL Susquehanna, LLC 769 Salem Blvd., NUCSB3 Berwick, PA 18603-0467

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI) - SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 (SSES 1 AND 2) - ELECTRICAL POWER SYSTEMS TECHNICAL SPECIFICATION (TS) 3.8.1 (TAC NO.

MD4766)

Dear Mr. McKinney:

In reviewing your letter dated March 2, 2007, concerning your request to add a new ACTIONS Note 3 to Unit 2 TS 3.8.1 to allow a Unit 1 4160 volt subsystem to be de-energized and removed from service to perform bus maintenance, the Nuclear Regulatory Commission staff has determined that additional information contained in the enclosure to this letter is needed to complete its review. These questions were discussed with your staff during a teleconference on November 8, 2007. As agreed to by your staff, we request you respond by December 7, 2007.

If you have any questions, please contact me at 301-415-1030.

Sincerely,

/ra/

Richard V. Guzman, Senior Project Manager Plant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-387 and 50-388

Enclosure:

RAI cc w/encl: See next page DISTRIBUTION:

Public RidsOgcMailCenter RidsNrrPmRGuzman RidsNrrEeebBC SRay LPLI-1 R/F RidsNrrDorlLpl1-1 RidsAcrsAcnwMailCenter RidsNrrLaSLittle MMcConnell RClark Accession Number: ML073130055

• RAI provided by memo. No substantive changes made.

OFFICE NRR/LPLI-1/PM NRR/LPLI-1/LA NRR/EEEB/BC NRR/LPLI-1/BC NAME RGuzman SLittle GWilson* MKowal DATE 11/14/07 11/14/07 10/11/07 11/14/07 OFFICIAL RECORD COPY

REQUEST FOR ADDITIONAL INFORMATION (RAI)

RELATING TO ELECTRICAL POWER SYSTEMS TECHNICAL SPECIFICATION 3.8.1 SUSQUEHANNA STEAM ELECTRIC STATION, UNITS 1 AND 2 (SSES 1 AND 2)

PPL SUSQUEHANNA, LLC DOCKET NOS. 50-387 AND 50-388 The Nuclear Regulatory Commission (NRC) staff is reviewing the proposed license amendment from PPL Susquehanna, LLC (PPL, the licensee) to Facility Operating License No. NPF-14 and NPF-22 related to Technical Specification (TS) 3.8.1, Electrical Power Systems - AC Sources Operating, for SSES 2. The NRC staff has determined that additional information requested below will be needed to complete its review.

1. PPL proposes to revise a new ACTIONS Note 3 to the SSES 2 TS 3.8.1 to allow a Unit 1 4160 volt (V) subsystem to be de-energized and removed from service to perform bus maintenance. Provide assurance for the following:

a) No maintenance or testing that affects the reliability of the remaining trains will be scheduled during the SSES Unit 1 bus maintenance. If any testing and maintenance activities must be performed during this time, an evaluation will be performed in accordance with Title 10 to the Code of Federal Regulations (10 CFR) Section 50.65(a)(4).

b) The scheduling of SSES Unit 1 4160 V bus preplanned maintenance will be avoided during seasons when the probability of severe weather or grid stress conditions is high or forecasted to be high.

c) The system load dispatcher will be contacted once per day to ensure no significant grid perturbations are expected during the bus maintenance. Also, the system load dispatcher should inform the plant operator if conditions change during the bus maintenance (e.g., unacceptable voltages could result due to a trip of the nuclear unit).

d) Component testing or maintenance of safety systems and important non-safety equipment including offsite power systems (auxiliary and startup transformers) that increase the likelihood of a plant transient or loss of offsite power will be avoided. In addition, no discretionary switchyard maintenance will be allowed.

e) TS requirements of verification that the required systems, subsystems, trains, components, and devices that depend on the remaining 4160 V buses are operable and positive measures will be provided to preclude subsequent testing or maintenance activities on these systems, subsystems, trains, components, and devices (e.g., the Unit 1 4160 V bus breakers will not lockout any of the remaining emergency 4160 V supplies).

Enclosure

f) Safety-related steam driven pumps will be controlled as protected equipment, and will not be taken out of service for planned maintenance while an SSES Unit 1 4160 V bus is out of service for extended maintenance.

g) Any component testing or maintenance that increases the likelihood of a plant transient would be avoided; plant operation should be stable during SSES Unit 1 4160 V maintenance.

Susquehanna Steam Electric Station, Unit Nos. 1 and 2 cc:

Cornelius J. Gannon Bryan A. Snapp, Esq Vice President - Nuclear Operations Assoc. General Counsel PPL Susquehanna, LLC PPL Services Corporation 769 Salem Blvd., NUCSB3 Two North Ninth Street, GENTW3 Berwick, PA 18603-0467 Allentown, PA 18101-1179 Robert M. Paley Supervisor - Document Control Services General Manager - Plant Support PPL Susquehanna, LLC PPL Susquehanna, LLC Two North Ninth Street, GENPL4 769 Salem Blvd., NUCSB2 Allentown, PA 18101-1179 Berwick, PA 18603-0467 Richard W. Osborne Rocco R. Sgarro Allegheny Electric Cooperative, Inc.

Manager - Nuclear Regulatory Affairs 212 Locust Street PPL Susquehanna, LLC P.O. Box 1266 Two North Ninth Street, GENPL4 Harrisburg, PA 17108-1266 Allentown, PA 18101-1179 Director, Bureau of Radiation Protection Supervisor - Pennsylvania Department of Nuclear Regulatory Affairs Environmental Protection PPL Susquehanna, LLC Rachel Carson State Office Building 769 Salem Blvd., NUCSA4 P.O. Box 8469 Berwick, PA 18603-0467 Harrisburg, PA 17105-8469 Michael H. Crowthers Senior Resident Inspector Supervising Engineer U.S. Nuclear Regulatory Commission Nuclear Regulatory Affairs P.O. Box 35, NUCSA4 PPL Susquehanna, LLC Berwick, PA 18603-0035 Two North Ninth Street, GENPL4 Allentown, PA 18101-1179 Regional Administrator, Region 1 U.S. Nuclear Regulatory Commission Ronald E. Smith 475 Allendale Road General Manager - Site Preparedness King of Prussia, PA 19406 and Services PPL Susquehanna, LLC Board of Supervisors 769 Salem Blvd., NUCSA4 Salem Township Berwick, PA 18603-0467 P.O. Box 405 Berwick, PA 18603-0035 Manager - Quality Assurance PPL Susquehanna, LLC Dr. Judith Johnsrud 769 Salem Blvd., NUCSB2 National Energy Committee Berwick, PA 18603-0467 Sierra Club 443 Orlando Avenue Luis A. Ramos State College, PA 16803 Community Relations Manager, Susquehanna PPL Susquehanna, LLC 634 Salem Blvd., SSO Berwick, PA 18603-0467