NOVELTY - Operating steam generation plant arranged to burn fuel including at least some biomass, is claimed. The plant includes boiler (10), means defining flue gas path leading from boiler to stack, and dump condenser system comprising flue gas moisture condensing arrangement (59) provided in flue gas path to extract latent heat of condensation from flue gas, dump cooler (29) external to flue gas path, liquid coolant circulation path including flue gas moisture condensing arrangement and dump cooler and liquid coolant pump (85) to circulate coolant round circulation path.    USE - The method is useful for operating steam generation plant to burn fuel.    ADVANTAGE - The method provides the plant which is capable of operating such that it is entirely self sufficient in water and places no water demand on the environment.    DETAILED DESCRIPTION - Operating a steam generation plant arranged to burn a fuel including at least some biomass, is claimed. The plant includes a boiler (10), means defining a flue gas path leading from the boiler to a stack, and a dump condenser system comprising a flue gas moisture condensing arrangement (59) provided in the flue gas path to extract latent heat of condensation from the flue gas, a dump cooler (29) external to the flue gas path, a liquid coolant circulation path including the flue gas moisture condensing arrangement and the dump cooler, a liquid coolant pump (85) to circulate coolant round the circulation path, and a supply arrangement for supplying a heat transfer agent to the dump cooler to remove heat from liquid coolant circulating through the dump cooler. The operation of at least one of the heat transfer agent supply arrangement and the liquid coolant circulation pump is controlled to regulate the quantity of condensate produced by the flue gas moisture condensing arrangement.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the plant to produce steam by combusting a biomass fuel including a steam turbine powered by the produced steam.    Boiler (10)    Dump cooler (29)    Flue gas moisture condensing arrangement (59)    Pump (85)