DCL-10-172, Delay of Submittal - PG&E Shoreline Fault Zone Final Report
| ML110050083 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/31/2010 |
| From: | Becker J Pacific Gas & Electric Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| DCL-10-172, OL-DPR-80, OL-DPR-82 | |
| Download: ML110050083 (2) | |
Text
I Pacific Gas and Electric Company December 31, 2010 James R. Becker Site Vice President Diablo Canyon Power Plant Mail Code 104/5/601 R 0. Box 56 Avila Beach, CA 93424 805.545.3462 Internal: 691.3462 Fax: 805.545.6445 PG&E Letter No. DCL-1 0-172 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Units 1 and 2 Delay of Submittal-PG&E Shoreline Fault Zone Final Report
Dear Commissioners and Staff:
In November 2008, PG&E's team of in-house geoscientists, working with the U.S.
Geological Survey as part of its Long Term Seismic Program at Diablo Canyon Power Plant, identified a new fault zone - the Shoreline Fault. PG&E's initial sensitivity study showed that the plant had adequate seismic margin to withstand the ground motions from the Shoreline Fault. In early 2009, the NRC independently studied the potential impact of the Shoreline Fault and concluded the plant had adequate seismic margin.
During 2009 and 2010, PG&E collected and reviewed additional data on the Shoreline Fault using seismic imaging and mapping and other advanced technology.
PG&E stated in a meeting with the NRC on January 5, 2010, that the final Shoreline Fault report would be completed by the end of 2010. PG&E has been working to submit the final Shoreline Fault report to the NRC this week, but feels additional time is necessary to ensure the completeness of the report. We anticipate the final report will be available for your review during the week of January 3, 2011.
trb/50086062/016 A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway 9 Comanche Peak e Diabto Canyon e Palo Verde *San Onofre
- South Texas Project e WoLf Creek Aw'
Document Control Desk December 31, 2010 Page 2 PG&E Letter DCL-10-172 Enclosures cc:
Norman A. Abrahamson Lloyd S. Cluff
.Elmo C. Collins, NRC Region IV Tom Farnholtz, NRC Region IV Annie M. Kammerer, NRC Marcia K. McLaren Michael S. Peck, DCPP NRC Resident Alan B. Wang, NRR A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Cattawa,
- Comanche Peak
- Diablo Canyon
- Palo Verde 9 South Texas Project
- Wolf Creek