In that case, the minimum price is specified in the contract. Svenska Kraftnat activated the reserves during 30 days during winter 2009/2010, and during 8 days during winter 2010/2011. This is a straightforward, quick and effective means to bring in new capacity when supply adequacy forecasts show a lack of capacity a few years in advance and if old plants have to be closed. This mechanism has been used to build a CCGT power plant in France in Brittany.