NRC-12-0073, DTE Energy - Plans for Restoration of the South Reactor Feedpump

DTE Energy - Plans for Restoration of the South Reactor Feedpump

ML12325A825
Person / Time
Site:	Fermi
Issue date:	11/16/2012
From:	Conner J DTE Energy
To:	NRC/RGN-III
References
NRC-12-0073
Download: ML12325A825 (2)

Text

J. Todd Conner Site Vice President DTE Energy Company 6400 N. Dixie Highway, Newport, MI 48166 Tel: 734.586.4849 Fax: i34.586.5295 Email: connelj@dteenergy.com

, DTE Energy*

November 16,2012 NRC-12-0073 Regional Administrator Region III U. S. Nuclear Regulatory Commission 2443 Warrenville Road, Suite 210 Lisle, Illinois 60532-4352

Reference:

Fermi 2 NRC Docket No. 50-341 NRC License No. NPF-43

Subject:

Plans for Restoration of the South Reactor Feedpump On June 25, 2012, during normal power ascension of the unit, the south reactor feedpump turbine exhibited abnormal vibration levels that resulted in the failure of the turbine assembly. Upon assessment of the damage and the condition of the feedpump turbine, it was determined that it would be necessary to disassemble the turbine components and ship them offsite for decontamination, rework or repair. Initial estimates indicated that between six and twelve months would be required to repair and reinstall the turbine assembly.

Based on this, a decision was made to physically and electrically isolate the south reactor feedpump in order to ensure safety and reliability while the plant operates with only the north reactor feedpump in service. This isolation of the south feedpump was completed and the plant was restarted on July 29,2012. Since that time, plant operation has been with one reactor feedpump in service, at reduced reactor power levels.

Plans are currently being finalized that support a mid-cycle outage in the first quarter of Calendar Year 2013 to restore the south reactor feedpump. These plans are contingent on the completion of significant asset refurbishment and testing activities and are potentially subject to change. Detroit Edison will restore the south reactor feedpump prior to plant startup following Refueling outage 16 (RF 16), currently scheduled for the first quarter of Calendar Year 2014. The restoration of the south reactor feedpump will reestablish the plant configuration that existed prior to the June 25,2012, and Fermi 2 will resume operating at the 100% licensed power limit.

t RECEIVED NOV 2 0 2017

USNRC NRC-12-0073 Page 2 Should you have any questions, please contact me at (734) 586-4849.

Sincerely, cc: Document Control Desk - Washington D C NRC Project Manager NRC Resident Office Reactor Projects Chief, Branch 4, Region III