ML13254A149
| ML13254A149 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 09/03/2013 |
| From: | Batson S Duke Energy Carolinas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML13254A149 (4) | |
Text
SCOTT L. BATSON Vice President
- ENERGY, Oconee Nuclear Station Duke Energy ONO IVP / 7800 Rochester Hwy Seneca, SC 29672 10 CFR 50.4 864-873-3274 864-873-4208 fax September 3, 2013 Scott.,Batson@duke-energy.com ATTN: Document Control Desk U. S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852-2746
Subject:
Duke Energy Carolinas, LLC Oconee Nuclear Station, Units 1, 2, and 3 Docket Numbers 50-269, 50-270, and 50-287 Supplemental Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident
References:
- 1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated March 12, 2012.
- 2. Duke Energy Carolinas, LLC (Duke Energy), Flood Hazard Reevaluation Report in response to NRC letter; "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated March 12, 2012.
- 3. U. S. Nuclear Regulatory Commission, "Confirmatory Action Letter - Oconee Nuclear Station, Units 1, 2, and 3 Commitments to Address External Flooding Concerns," dated June 22, 2010.
On March 12, 2012, the NRC issued Reference 1 to all power reactor licensees and holders of construction permits in active or deferred status. Enclosure 2 of Reference 1 requested that each licensee perform a reevaluation of external flooding sources and report the results in accordance with the NRC's prioritization plan. Duke Energy submitted the flood reevaluation for the Oconee Nuclear Station (ONS) in Reference 2. Reference 2 addressed the consideration of interim actions that Duke Energy has taken or plans to take to address higher flooding hazards relative to the design basis until the integrated assessment is completed.
ONS ultimately determined that no interim actions were necessary to be taken or planned to address the higher flood level derived from the Local Intense Precipitation event.
With respect to flood levels from postulated dam failures, it was also determined that no new interim actions were necessary. This was primarily due to the levels determined in the Hazard SkoL
U.S. Nuclear Regulatory Commission September 3, 2013 Page 2 Reevaluation Report (HRR) related to postulated dam failures being lower than the levels in the current license basis, and because the pre-existing flood commitments which are in place for the ONS Flood Confirmatory Action Letter (Reference 3) bound the levels determined by the HRR.
The enclosed table provides a reference to the committed actions which are in place and being maintained in accordance with the Confirmatory Action Letter (CAL). Due to the regulatory nature of a CAL, those commitments require NRC notification (approval) to make changes. The enclosure also provides additional details regarding consideration of interim actions due to the HRR.
There are no new regulatory commitments contained in this his letter. The bounding commitments related to the CAL will continue to be managed in accordance with the CAL process.
Any inquiries on this submittal should be directed to David Haile, Oconee Regulatory Affairs Group, at (864) 873-4742.
I declare under penalty of perjury that the foregoing is true and correct. Executed on September 3, 2013.
Sincerely, Scott L. Batson Vice President Oconee Nuclear Station Enclosure
- 1. Reevaluation Report Interim Action Commitments
U.S. Nuclear Regulatory Commission September 3, 2013 Page 3 cc: (w/enclosure)
Victor McCree, Region II Administrator U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Avenue NE, Suite 1200 Atlanta, Georgia 30303-1257 Eric Leeds, Director, Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission One White Flint North, Mailstop 13-H16M 11555 Rockville Pike Rockville, MD 20852 Richard Guzman, Project Manager (ONS)
(by electronic mail only)
U.S. Nuclear Regulatory Commission One White Flint North, Mailstop O-8C2 11555 Rockville Pike Rockville, MD 20852 Eddy Crowe NRC Senior Resident Inspector Oconee Nuclear Station Jonathan Bartley, Region II U.S. Nuclear Regulatory Commission Marquis One Tower 245 Peachtree Center Ave., NE, Suite 1200 Atlanta, GA 30303-1257
ENCLOSURE I - REEVALUATION REPORT INTERIM ACTION COMMITMENTS Item Interim Actions Taken or Planned to Take Report Reference Additional Actions Implementation Number as Included in the Reevaluation Report (Ref. 2)
Date The commitments made in response to Confirmatory Action Letter (CAL) 2-10-003 (Ref. 3) relate to a combined Jocassee and Keowee dam failure - the flooding levels Page 66 12-15-10 determined in the Reevaluation Report are bounded by these commitments.
These commitments will be maintained by the CAL process.
Summary of Corrective Action initiated in response to the Flood Hazard Reevaluation Report for Local Intense Precipitation (PIP 0-12-02624)
Proposed Action:
Determine any interim actions taken or planned to address the reevaluated flooding hazard (10CFR50.54(f) letter, Recommendation 2.1) while the staff assesses the safety and regulatory significance of the reevaluated hazard. Develop additional actions as required.
Results:
Determined that existing site Abnormal Procedures (AP) and Emergency Operating Procedures (EOP) mitigate the impacts of the beyond design basis flooding levels from a Local Intense Precipitation (LIP) event.