Signed after a public procurement process, the agreement covers scheduled and unscheduled repair and overhauls of four Foster Wheeler 115MW circulating fluidised bed (CFB) boilers, 14 Taganrog 100MW pulverised combustion (PC) boilers, as well as nine LMZ turbines.

Alstom Estonia managing director Karl Jaanimägi said, "This agreement to prolong the maintenance of Narva Power Plants will further strengthen our long co-operation with Eesti Energia and is proof of our technical capabilities to provide value-added service for the customer."

The previous long term service agreements ran from 2000 to 2013.

The duration of new contracts is 34 months, starting in March 2014, and they also include a prolongation possibility for an additional 2 years.

Alstom has earlier supplied electrostatic precipitators to clean the flue gases of the boilers of all the power units and also performed three low-pressure (LP) turbine retrofits at the Narva power plants.

In addition, the company supplied new semi-dry desulphurization systems (DeSOx) for four energy blocks at the Narva plants during 2010 to 2013 timeframe.

Located near the border with Leningrad Oblast, Russia, the Narva power plants generate almost 90% of electricity in Estonia.