Reactor Decommissioning History
Millstone Unit-1
revised 19 October 2014

Overview

Millstone Unit 1 was a GE design commercial BWR power reactor. It had a generating capacity of 652 MWe and 2011 MWt. It operated from 1970 to November 1995. It was partially decommissioned while Units 2 and 3 were operating. Final decommissioning is planned to be done with Unit 2. Unit 1 is currently cold, dark, and dry (except for the spent fuel pool island) and is in a combination DECON & /SAFSTOR until 2048.

Reactor Decommissioning Specifics

Internals Removal
All work was performed underwater. Several remotely operated mechanical segmentation tools were used. All work on the internals was done by Framatome ANP (now AREVA NP) and MOTA. Completed in 2004. Some internals remain in the vessel.

Reactor Vessel Removal
The reactor pressure vessel is drained and still in place. Plans are to remove the vessel after the Unit-2 license expires in 2025. However the NRC has had 2056 as the expected date of closure.

Segmentation and Packaging Plan (S&P Plan)
none noted.

Key People
none noted.

Contractors
Transnuclear.
Framatome ANP (AREVA NP).
MOTA Corporation.
Duratek Services, Inc.
SCIENTECH, Inc. (nature of their scope not known).

Comments
None.

Related Publications and Documents
No published technical papers have been found relating to the decommissioning of this reactor or segmentation of the reactor internals.

References
NRC's "Fact Sheet on Decommissioning Nuclear Power Plants" (web page 8/15/05).
The NRC's web page as of 8/12/05, 8/24/06, 2/22/10.
Cogema's (AREVA) web page as of 8/12/05.
MOTA Corporation's web page as of 8/14/05.
Nukeworker.com web page as of 9/7/04.

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