Complex sentence: In March 2015 the power station was'deep mothballed' in response to adverse market conditions; it reopened in December 2015 after winning a stand-by contract to provide 734 MWe of capacity.
Split into simpler sentences: In March 2015 the power station was'deep mothballed' in response to adverse market conditions. The power station is due to reopen in December 2015 after winning a stand-by contract to provide 734 MWe of capacity.