ML082530348
| ML082530348 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 09/15/2008 |
| From: | Vaaler M Plant Licensing Branch II |
| To: | Burton C Carolina Power & Light Co |
| Vaaler, Marlayna, NRO/DNRL 415-3178 | |
| References | |
| TAC MD8676 | |
| Download: ML082530348 (5) | |
Text
September 15, 2008 Chris L. Burton, Vice President Shearon HNP Nuclear Power Plant Carolina Power & Light Company Post Office Box 165, Mail Zone 1 New Hill, North Carolina 27562-0165
SUBJECT:
SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION REGARDING AMENDMENT TO LOWER THE MINIMUM ALLOWED LEVEL OF THE ULTIMATE HEAT SINK MAIN RESERVOIR (TAC NO. MD8676)
Dear Mr. Burton:
By letter dated April 30, 2008, Carolina Power and Light Company, now doing business as Progress Energy Carolinas, Inc., submitted a proposed amendment for the Shearon Harris Nuclear Power Plant, Unit 1 (HNP).
The proposed amendment would revise Technical Specification (TS) Section 3.7.5a to restore the Ultimate Heat Sink Main Reservoir minimum level to the value allowed by the initial operating license as a result of improvements made to the Emergency Service Water system.
The change will allow continued plant operation to a Main Reservoir minimum level of 206 feet (ft) Mean Sea Level (MSL) in Modes 1-4, versus the current minimum allowed level of 215 ft MSL.
The U.S. Nuclear Regulatory Commission staff has determined that it needs additional information in order to complete its review. Please respond to the enclosed questions by December 12, 2008, in order to facilitate a timely completion of the staff review. Please contact me at 301-415-3178 if you have any questions on this issue, would like to participate in a conference call, or if you require additional time to submit your responses.
Sincerely,
/RA/
Marlayna Vaaler, Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-400
Enclosure:
As stated cc w/enclosure: See next page
Chris L. Burton, Vice President September 15, 2008 Shearon HNP Nuclear Power Plant Carolina Power & Light Company Post Office Box 165, Mail Zone 1 New Hill, North Carolina 27562-0165
SUBJECT:
SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION REGARDING AMENDMENT TO LOWER THE MINIMUM ALLOWED LEVEL OF THE ULTIMATE HEAT SINK MAIN RESERVOIR (TAC NO. MD8676)
Dear Mr. Burton:
By letter dated April 30, 2008, Carolina Power and Light Company, now doing business as Progress Energy Carolinas, Inc., submitted a proposed amendment for the Shearon Harris Nuclear Power Plant, Unit 1 (HNP).
The proposed amendment would revise Technical Specification (TS) Section 3.7.5a to restore the Ultimate Heat Sink Main Reservoir minimum level to the value allowed by the initial operating license as a result of improvements made to the Emergency Service Water system.
The change will allow continued plant operation to a Main Reservoir minimum level of 206 feet (ft) Mean Sea Level (MSL) in Modes 1-4, versus the current minimum allowed level of 215 ft MSL.
The U.S. Nuclear Regulatory Commission staff has determined that it needs additional information in order to complete its review. Please respond to the enclosed questions by December 12, 2008, in order to facilitate a timely completion of the staff review. Please contact me at 301-415-3178 if you have any questions on this issue, would like to participate in a conference call, or if you require additional time to submit your responses.
Sincerely,
/RA/
Marlayna Vaaler, Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-400
Enclosure:
As stated cc w/enclosure: See next page DISTRIBUTION:
PUBLIC RidsNrrPMMVaaler RidsNrrDssSbpb LPL2-2 R/F RidsNrrLACSola RidsRgn2MailCenter RidsNrrDorlLpl2-2 RidsOgcRp RidsAcrsAcnw&mMailCenter ADAMS Accession Number: ML082530348 NRR-088 OFFICE LPL2-2/PM LPL2-2/LA SBPB/BC LPL2-2/BC NAME MVaaler CSola DHarrison*
TBoyce (BMozafari for)
DATE 9/15/08 9/12/08 8/12/2008 9/15/08
- by memo dated OFFICIAL RECORD COPY
Mr. Chris L. Burton Shearon Harris Nuclear Power Plant, Unit No. 1 cc:
Mr. Kelvin Henderson Plant General Manager Shearon Harris Nuclear Power Plant Progress Energy Carolinas, Inc.
Post Office Box 165, Mail Zone 3 New Hill, North Carolina 27562-0165 Director of Site Operations Shearon Harris Nuclear Power Plant Progress Energy Carolinas, Inc.
Post Office Box 165, Mail Zone 1 New Hill, North Carolina 27562-0165 Mr. David H. Corlett, Supervisor Licensing/Regulatory Programs Shearon Harris Nuclear Power Plant Progress Energy Carolinas, Inc.
Post Office Box 165, Mail Zone 1 New Hill, North Carolina 27562-0165 Ms. Kimberly A. Harshaw, Manager Support Services Shearon Harris Nuclear Power Plant Progress Energy Carolinas, Inc.
Post Office Box 165, Mail Zone 1 New Hill, North Carolina 27562-0165 Resident Inspector / Harris NPS c/o U. S. Nuclear Regulatory Commission 5421 Shearon Harris Road New Hill, North Carolina 27562-9998 Mr. J. Paul Fulford Manager, Performance Evaluation and Regulatory Affairs PEB 5 Progress Energy Carolinas, Inc.
Post Office Box 1551 Raleigh, North Carolina 27602-1551 Mr. David T. Conley Associate General Counsel II -
Legal Department Progress Energy Service Company, LLC Post Office Box 1551 Raleigh, North Carolina 27602-1551 Ms. Beverly Hall, Section Chief Division of Radiation Protection N.C. Department of Environment and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721 Public Service Commission State of South Carolina Post Office Drawer 11649 Columbia, South Carolina 29211 Mr. Robert P. Gruber Executive Director Public Staff NCUC 4326 Mail Service Center Raleigh, North Carolina 27699-4326 Ms. Margaret A. Force Assistant Attorney General State of North Carolina Post Office Box 629 Raleigh, North Carolina 27602 Mr. Tony Gurley, Chair Board of County Commissioners of Wake County Post Office Box 550 Raleigh, North Carolina 27602 Mr. Carl Thompson, Chair Board of County Commissioners of Chatham County Post Office Box 87 Pittsboro, North Carolina 27312 Mr. John H. ONeill, Jr.
Pillsbury Winthrop Shaw Pittman, LLP 2300 N Street NW.
Washington, DC 20037-1128 Mr. John D. Runkle Attorney at Law Post Office Box 3793 Chapel Hill, North Carolina 27515-3793 Mr. Jim Warren NC Waste Awareness & Reduction Network Post Office Box 61051 Durham, North Carolina 27715-1051 Chairman of the North Carolina Utilities Commission Post Office Box 29510 Raleigh, North Carolina 27626-0510 Robert J. Duncan II Vice President, Nuclear Operations Progress Energy Post Office Box 1551 Raleigh, North Carolina 27602-1551 Brian C. McCabe Manager, Nuclear Regulatory Affairs Progress Energy Post Office Box 1551 Raleigh, North Carolina 27602-1551
Enclosure REQUEST FOR ADDITIONAL INFORMATION SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 AMENDMENT TO LOWER THE MINIMUM ALLOWED LEVEL OF THE ULTIMATE HEAT SINK MAIN RESERVOIR DOCKET NO. 50-400 The NRC staff has determined that it needs responses to the following questions in order to continue its review of the subject document. Please note that if any portion of the response to this request is sensitive or security-related, it must be marked as such in the response.
- 1.
Please expand the background section discussion on page three to include the historical events (i.e., past amendments and recommendations) leading to this amendment request. Please include details on the fan coolers and the impact they have had on the Emergency Service Water (ESW) system. In addition, please discuss any historical events related to the Ultimate Heat Sink (UHS) from flood to drought and any constraints associated with subsequent modifications.
- 2.
Please expand the discussion of modifications and improvements (single versus two stage pumps) on page 5, paragraph 3. Provide a discussion of the uncertainty in the calculations that support the flow balance and available margin to operate at the original UHS level. In addition, please discuss the potential impacts on pump submergence, vortex, and cavitations at the lower UHS water level.
- 3.
In Table EPT-250 (A) there is a 4 percent margin for the ESW system reported. It is also stated that calculation SW-0800 uses a 4 percent margin of error. Please clarify and address the difference between the reported margin and the calculated uncertainty.
- 4.
In Table EPT-250 (A) and (B), no data on CSIP C pump and gear were reported. Please provide applicable data if CSIP C is credited for flow balance and discuss its function.
- 5.
On page 8, paragraph 1, it is stated that throttling of the system provides extra conservatism in the calculation. Please clarify this statement and provide a discussion to support this assertion.
- 6.
On page 8, section 4.2, paragraph 1, it is stated that the ESW system prevents unmonitored outleakage via the ESW piping at the maximum expected post-accident containment pressure. Please clarify this statement and provide a discussion to support this assertion.
- 7.
On page 8, section 4.2, paragraph 3, it is stated that the results also show that ESW pressure, not flow, currently defines the available ESW system margin. Please clarify this statement and provide the results and available margin obtained using calculation HNP-M/MECH-1011, and discuss these results in further detail.
- 8.
On page 9, paragraph 2, the application states that there is a 3 psi pressure drop from the 220 ft to the 206 ft elevation inside containment. Please expand the discussion with regard to remaining pressure specific drops and available margin.
- 9.
On page 12, section 4.3, it is stated that the ESW supply temperature must remain below 95°F. However, in the revised technical specification 3.7.5 (b), it states that water temperature at the respective intake structure is less than 94°F. Please explain the temperature discrepancy.
- 10.
Please discuss the potential impacts of a lower minimum UHS level available for cooling of ESW and other plant components that may be relied upon to satisfy the mitigation strategies required by Section B.5.b of Commission order EA-02-026.