ML12363A129

Response to 10 CFR 50.54(f) Request

ML12363A129
Person / Time
Site:	Oconee
Issue date:	09/26/2008
From:	Baxter D Duke Energy Corp
To:	Office of Nuclear Reactor Regulation
References
FOIA/PA-2012-0127, TAC MD8224, TAC MD8225, TAC MD8226, FOIA/PA-2015-0348
Download: ML12363A129 (43)

Text

Attachment 4 Regulatory Commitments Oconee Response to 10 CFR 50.54(f) Letter September 26, 2008 Page 2 The following commitment table identifies those actions committed to by Duke Energy Carolinas, LLC (Duke) in this letter. Other actions discussed in this letter represent intended or planned actions by Duke. They are described to the Nuclear Regulatory Commission (NRC) for information and are therefore not regulatory commitments.

Perform flooding studies using the HEC-RAS model for comparison December 2008 with previous DAMBRK models.

Create interim guidance to address mitigation of postulated flood events February 2009 which render the SSF inoperable.

Implement short-term modifications to extend the height of existing SSF February 2009 flood walls to 803.5 ft msl.

Complete RAC Engineers & Economists (Utah State University) risk February 2010 study to provide quantitative risk analysis of postulated dam failure modes and resulting breach sizes of the Jocassee and Keowee dams.

Included within the study will be the use of the new inundation model (HEC-RAS) to predict the flood elevations at ONS, based on the postulated break sizes.