ML15141A147
| ML15141A147 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/21/2015 |
| From: | Hall J Plant Licensing Branch II |
| To: | Batson S Duke Energy Carolinas |
| Cotton K NRR/DORL/LPL2-1, 415-1438 | |
| References | |
| TAC MF4668, TAC MF4669, TAC MF4670 | |
| Download: ML15141A147 (4) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Scott Batson Site Vice President Oconee Nuclear Station Duke Energy Carolinas, LLC 7800 Rochester Highway Seneca, SC 29672-0752 May 21, 2015
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 - REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO REDUCE ALLOWED MAXIMUM RA TED THERMAL POWER WHEN HIGH PRESSURE INJECTION EQUIPMENT IS INOPERABLE (TAC NOS. MF4668, MF4669, AND MF4670)
Dear Mr. Batson:
By letter dated June 30, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14184B384), Duke Energy (the licensee) submitted a license amendment request (LAR) for Oconee Nuclear Station (ONS), Unit Nos. 1, 2, and 3. The proposed amendment would revise Technical Specification 3.5.2 by reducing the allowed maximum Rated Thermal Power at which each unit can operate when select High Pressure Injection system equipment is inoperable.
The U.S. Nuclear Regulatory Commission staff has reviewed the information submitted by the licensee, and has determined that additional information is needed to complete its review. The specific questions are found in the enclosed request for additional information (RAI). Please provide a response to these RAls by May 29, 2015.
If you have any questions, please call me at 301-415-4032 or Karen Cotton at 301-415-1438.
Docket Nos. 50-269, 50-270, and 50-287
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv Sincerely,,f
1£4' R. !-LlX J/m~s R. Hall, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST TO REDUCE ALLOWED MAXIMUM RATED THERMAL POWER WHEN HIGH PRESSURE INJECTION EQUIPMENT IS INOPERABLE DUKE ENERGY CAROLINAS, LLC OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 DOCKET NOS. 50-269, 50-270 AND 50-287 By letter dated June 30, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14184B384), Duke Energy Carolinas, LLC (the licensee) submitted a license amendment request (LAR) for the Oconee Nuclear Station, Units 1, 2, and 3. The proposed amendment would revise Technical Specification 3.5.2 by reducing the allowed maximum Rated Thermal Power at which the unit can operate when select High Pressure Injection system equipment is inoperable. The U.S. Nuclear Regulatory Commission staff has reviewed the information submitted by the licensee, and has determined that additional information is needed to complete its review, as follows.
RAl-1:
On November 26, 2014, AREVA, Inc. filed a report in accordance with Title 10 of the Code of Federal Regulations (10 CFR), Part 21 "Reporting of Defects and Noncompliance," addressing a defect in the LOCA analysis for B&W plants (ADAMS Accession No. ML14337A095).
Explain the impact of the fuel Thermal Conductivity Degradation identified by AREVA in that report on the Oconee Nuclear Station's small-break loss-of-coolant accident (LOCA) analysis of record.
RAl-2:
10 CFR 50.46 (a)(1 )(i) requires that performance of the emergency core cooling system should be analyzed using a comprehensive selection of assumed breaks. The analysis presented in the license amendment request did not consider reactor coolant system (RCS) breaks in the hot-leg and the reactor coolant pump suction. Provide the rationale for not considering all the possible spectrum of break locations in support of the LAR.
RAl-3:
The technical specifications (TSs), as defined in 10 CFR 50.36, are required to be representative of the design and plant specific operating conditions. Provide the rationale that the planned changes to the Oconee TSs and emergency operating procedures (EOPs) are representative of all 3 Oconee units.
Enclosure
2 RAl-4:
10 CFR 50, Appendix B, Criterion V, requires that procedures affecting quality shall be appropriate to the circumstances and should include acceptance criteria for determining that important activities have been satisfactorily accomplished. Describe how the EOPs will be modified to accomplish these requirements so as to inhibit the intrusion of nitrogen into the RCS by the core flood tanks during a LOCA event without compromising any of the many other safety analysis requirements.
Mr. Scott Batson Site Vice President Oconee Nuclear Station Duke Energy Carolinas, LLC 7800 Rochester Highway Seneca, SC 29672-0752 May 21, 2015
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 - REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST TO REDUCE ALLOWED MAXIMUM RA TED THERMAL POWER WHEN HIGH PRESSURE INJECTION EQUIPMENT IS INOPERABLE (TAC NOS. MF4668, MF4669, AND MF4670)
Dear Mr. Batson:
By letter dated June 30, 2014 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML14184B384), Duke Energy (the licensee) submitted a license amendment request (LAR) for Oconee Nuclear Station (ONS), Unit Nos. 1, 2, and 3. The proposed amendment would revise Technical Specification 3.5.2 by reducing the allowed maximum Rated Thermal Power at which each unit can operate when select High Pressure Injection system equipment is inoperable.
The U.S. Nuclear Regulatory Commission staff has reviewed the information submitted by the licensee, and has determined that additional information is needed to complete its review. The specific questions are found in the enclosed request for additional information (RAI). Please provide a response to these RAls by May 29, 2015.
If you have any questions, please call me at 301-415-4032 or Karen Cotton at 301-415-1438.
Sincerely, IRA/
James R. Hall, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:
PUBLIC LPLll-1 R/F RidsNrrPMOconee RidsNrrDssSnpb JWhited, NRR RidsAcrsAcnw_MailCtr Resource RidsNrrLASFigueroa Resource RidsOgcRp Resource BParks, NRR ADAMS A ccess1on N ML15141A147 o.:
OFFICE NRR/LPL2-1 /PM NRR/LPL2-1 /LA NRR/SRXB/BC*
SFigueroa NAME KCotton (SRohrer for)
CJackson DATE 05/21/2015 05/21/2015 05/18/2015 OFFICIAL RECORD COPY RidsNrrDorlDpr Resource RidsNrrDorllp2-1 Resource RidsRgn2MailCenter Resource JWhitman, NRR
- concurre db d
1y memoran um NRR/LPL2-1/BC NRR/LPL2-1/PM RPascarelli JHall 05/21/2015 05/21/2015