ML16056A583
| ML16056A583 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/26/2016 |
| From: | Jeffrey Whited Plant Licensing Branch II |
| To: | Markley M Plant Licensing Branch II |
| Whited J, NRR, DORL 415-4090 | |
| References | |
| CAC MF6454, CAC MF6455, CAC MF6456 | |
| Download: ML16056A583 (3) | |
Text
MEMORANDUM TO:
FROM:
SUBJECT:
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 FEbn.Ery 26, 2016 Michael T. Markley, Chief Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation/ A. Id /J Jeffrey A. Whited, Project Manager V(;£ ~
Plant Licensing Branch 11-1
~
Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3, DRAFT REQUEST FOR ADDITIONAL INFORMATION RE: LICENSE AMENDMENT REQUEST TO ADOPT EMERGENCY ACTION LEVEL SCHEME BASED ON NEI 99-01 REV. 6 (CAC NOS. MF6454, MF6455 AND MF6456)
The attached draft request for additional information (RAI) was transmitted on February 23, 2016, to Duke Energy Carolinas, LLC (Duke, the licensee). This information was transmitted in order to clarify the licensee's license amendment request (LAR) submitted on June 23, 2015, as supplemented by letter dated February 4, 2016, for Oconee Nuclear Station, Units 1, 2, and 3 (ONS). In the LAR the licensee proposes to revise the ONS EAL scheme to one based upon Revision 6 to Nuclear Energy Institute (NEI) document NEI 99-01, "Development of Emergency Action Levels for Non-Passive Reactors".
The draft RAI was sent to the licensee to ensure that the questions are understandable, the regulatory basis for the questions is clear, and to determine if the information was previously docketed. Duke intends to respond to this RAI by March 25, 2016. This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensee's request.
Docket Nos. 50-269, 50-270, and 50-287.
Attachment:
Draft RAI cc w/attachment: Distribution via Listserv
DRAFT REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST EMERGENCY ACTION LEVEL SCHEME CHANGE OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 DOCKET NO'S. 50-269, 50-270, AND 50-287 By letter dated June 23, 2015, 1 as supplemented by letter dated February 4, 2016, 2 Duke Energy Carolinas, Inc., (Duke) submitted a license amendment requested (LAR) for U.S.
Nuclear Regulatory Commission (NRC) approval for an emergency action level (EAL) scheme change for the Oconee Nuclear Station, Units 1, 2, and 3 (ONS). Duke proposes to revise the ONS EAL scheme to one based upon Revision 6 to Nuclear Energy Institute (NEI) document NEI 99-01, "Development of Emergency Action Levels for Non-Passive Reactors". 3 The request for additional information (RAI) question listed below is needed to support the NRC staff's continued technical review of the proposed EAL scheme change.
RAl-24 Please explain, in greater detail, the response to RAl-05, submitted by letter dated February 4, 2016. In particular, please explain why the values and thresholds developed for EALs RU1, RA 1, RS 1, and RG 1, in accordance with NEI 99-01, Revision 6, are about a factor of 7 different than those developed for your present EAL scheme which used the NUMARC/NESP-007 EAL scheme development guidance. The assumptions for the NUMARC and NEI guidance are essentially the same (except using different dose calculation method(s)), therefore this less conservative value(s) for the EALs presently in place requires more information to allow the NRC staff to better understand not only what is proposed but also why it is so different than what is currently approved, and if the currently approved EALs have been under-conservative since approval.
1 Agencywide Documents Access and Management System (ADAMS) Accession No. ML15183A060.
2 ADAMS Accession No. ML16041A237.
3 ADAMS Accession No. ML12326A805.
Attachment
February 26, 2016 MEMORANDUM TO:
Michael T. Markley, Chief Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation FROM:
Jeffrey A. Whited, Project Manager IRA/
Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3, DRAFT REQUEST FOR ADDITIONAL INFORMATION RE: LICENSE AMENDMENT REQUEST TO ADOPT EMERGENCY ACTION LEVEL SCHEME BASED ON NEI 99-01 REV. 6 (CAC NOS. MF6454, MF6455 AND MF6456)
The attached draft request for additional information (RAI) was transmitted on February 23, 2016, to Duke Energy Carolinas, LLC (Duke, the licensee). This information was transmitted in order to clarify the licensee's license amendment request (LAR) submitted on June 23, 2015, as supplemented by letter dated February 4, 2016, for Oconee Nuclear Station, Units 1, 2, and 3 (ONS). In the LAR the licensee proposes to revise the ONS EAL scheme to one based upon Revision 6 to Nuclear Energy Institute (NEI) document NEI 99-01, "Development of Emergency Action Levels for Non-Passive Reactors".
The draft RAI was sent to the licensee to ensure that the questions are understandable, the regulatory basis for the questions is clear, and to determine if the information was previously docketed. Duke intends to respond to this RAI by March 25, 2016. This memorandum and the attachment do not convey or represent an NRC staff position regarding the licensee's request.
Docket Nos. 50-269, 50-270, and 50-287
Attachment:
Draft RAI cc w/attachment: Distribution via Listserv DISTRIBUTION PUBLIC RidsNrrDorlDpr Resource RidsNrrDorlLpl2-1 Resource D. Johnson, NSIR/DDEP ACCESSION NO.: ML16056A583 OFFICE LPL2-1/PM NAME JWhited DATE 02/26/2016 OFFICIAL RECORD COPY LPL2-1 R/F RidsNrrPMOconee Resource RidsNsirDprDdep Resource