UPDATE 2-Britain unveils nuclear energy expansion plans

* UK minister names 10 possible sites for new nuclear plants

* Planning process must be faster; deal with plans in a year

* Miliband: Nuclear will help low carbon transition plan

(Adds quotes, details, reaction)

By Daniel Fineren

LONDON, Nov 9 (Reuters) - Britain set out plans on Monday to speed up the planning process for big wind farms and new nuclear power plants and named 10 sites where reactors could be built.

Energy and Climate Change Secretary Ed Miliband said new nuclear plants, combined with cleaner coal plants and more renewable energy, would help Britain to secure its energy supplies and cut its greenhouse gas emissions.

About 20 percent of Britain's electricity was generated from existing nuclear power reactors in the second quarter of 2009, but all except one of them is due to shut by 2025.