ML15320A386
| ML15320A386 | |
| Person / Time | |
|---|---|
| Site: | Oconee, Mcguire, Catawba, Harris, Brunswick, McGuire  |
| Issue date: | 11/19/2015 |
| From: | Jeffrey Whited Plant Licensing Branch II |
| To: | Repko R Duke Energy Corp |
| Whited J | |
| References | |
| CAC MF6413, CAC MF6414, CAC MF6415, CAC MF6416, CAC MF6417, CAC MF6418, CAC MF6419, CAC MF6420, CAC MF6421, CAC MF6422 | |
| Download: ML15320A386 (5) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. Regis T. Repko Senior Vice President - Governance, Projects, and Engineering Duke Energy Mail Code ECO?H/P.O. Box 1006 Charlotte, NC 28201-1006 November 19, 2015
SUBJECT:
BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2; SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1; CATAWBA NUCLEAR STATION, UNITS 1 AND 2; MCGUIRE NUCLEAR STATION, UNITS 1 AND 2; AND OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3: REQUEST FOR ADDITIONAL INFORMATION REGARDING CHANGE TO QUALITY ASSURANCE TOPICAL REPORT (CAC NOS. MF6413 THROUGH MF6422)
Dear Mr. Repko:
By letter dated June 24, 2015, Duke Energy Progress, Inc., and Duke Energy Carolinas, LLC (Duke Energy) submitted a combined license amendment request (LAR) for U.S. Nuclear Regulatory Commission (NRC) approval for several of its reactor site. The proposed change would revise or add Technical Specification Surveillance Requirements to verify that the syste'm locations susceptible to gas accumulation are sufficiently filled with water and to provide allowances which permit performance of the verification. These changes are requested to address concerns discussed in NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems. Duke Energy stated in its LAR that the proposal was consistent with Technical Specifications Task Force (TSTF) Traveler - 523, Revision 2, "Generic Letter 2008-01, Managing Gas Accumulation." The NRC staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete its review.
A draft copy of the enclosed questions were sent to Mr. Art Zaremba, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. Please respond to the enclosed questions within 60 days of the date of this letter.
R. If you have any questions, please call me at 301-415-4090, or e-mail me at Jeffrey.Whited@nrc.gov.
Docket Nos. 50-325, 50-324, 50-400, 50-413, 50-414, 50-369, 50-370, 50-269, 50-270, and 50-287
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv
/
Sincerely, VA~
Jeffrey A. Whited, Project Manager Plant Licensing Branch 11-1
' Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
REQUEST FOR ADDITIONAL INFORMATION OFFICE OF NUCLEAR REACTOR REGULATION LICENSE AMENDMENT REQUEST TO ADOPT TSTF-523 DUKE ENERGY CAROLINAS, LLC AND DUKE ENERGY PROGRESS, INC.
BRUNSWICK STEAM ELECTRIC PLANT. UNITS 1 AND 2 SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 CATAWBA NUCLEAR STATION, UNITS 1AND2 MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 DOCKET NOS. 50-325, 50-324, 50-400, 50-413, 50-414, 50-369, 50-370, 50-269, 50-270, AND 50-287
/
By letter dated June 24, 2015, 1 Duke Energy Progress, Inc., and Duke Energy Carolinas, LLC (Duke Energy) submitted a combined license amendment request (LAR) for U.s*. Nuclear Regulatory Commission (NRC) approval for several of its reactor sites. The proposed change would revise or add Technical Specification (TS) Surveillance Requirements (SRs) to verify that the system locations susceptible to gas accumulation are sufficiently filled with water and to provide allowances which permit performance of the verification. These changes are requested to address concerns discussed in NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems".2 Duke Energy stated in its LAR that the proposal was consistent with Technical Specifications Task Force (TSTF) Traveler - 523, Revision 2, "Generic Letter 2008-01, Managing Gas Accumulation". 3 Contrary to the above statement, in its LAR, Duke Energy proposed a 92-day surveillance frequency for Brunswick SRs 3.5.1.1, 3.5.3.1, and 3.6.2.3.3 and Shearon Harris SR 4.6.2.1.e.
This differs from the 31-day surveillance frequency for the SRs requested for the other referenced sites. The NRC Model Safety Evaluation,4 specifies a 31-day surveillance frequency for the SRs. The NRC staff has reviewed the licensee's submittal and determined that responses to the following Request for Additional Information (RAI) questions are needed to clarify the proposed 92-day frequency, and to complete its review.
1 Agencywide Documents Access and Management System (ADAMS) Accession No. ML15175A438.
2 ADAMS Accession No. ML072910759.
3 ADAMS Accession No. ML13053A075.
4 ADAMS Accession No. ML13255A169.
Enclosure RAI 1: Please provide the Brunswick surveillance history regarding gas accumulation, starting in 2008, that includes the surveillance date; the location; the measured, allowable, and as-left void volumes; the number of days since the last surveillance; the TS surveillance frequency; and clarification comments. Please do not include surveillance detail that determined existence of. a water-solid condition. Please include the total number of Brunswick surveillances.
RAI 2: The proposed Technical Specification Bases for Brunswick SR 3.4.7.2, as submitted with the LAR, state, in part, that:
Gas accumulation in the RHR shutdown cooling (SOC) suction flow path
)
is satisfactorily addressed by procedures which fill the system prior to placing SOC in service.
Is a follow-up measurement of high point voids conducted to assess the acceptability of the filling process?
RAI 3: Please provide justification for selection of a 92-day frequency in Shearon Harris SR 4.6.2.1.e. Please include the RAI 1 and 2 information categories in the response when applicable.
If you have any questions, please call me at 301-415-4090, or e-mail me at Jeffrey.Whited@nrc.gov.
Sincerely,
/RA/
\\;
Jeffrey A. Whited, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulati_on Docket Nos. 50-325, 50-324, 50-400, 50-413, 50-414, 50-369, 50-370, 50-269, 50-270, and 50-287
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:
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1111°9/15 11 /19/15