Many modern power plants run at close to 1,000F and at 3,000 psi. The weight of steam equals the weigh of water under this super-critical condition. Water does not boil but gets thinner and thinner. Solids do not accumulate in the boiler and there is no boiler blow down. Any solids in the water get carried through and deposited on the turbine. Water treating is a science with these boilers. The re heaters glow red hot in the turbine room. Materials in the boiler tend to fail under this heat. More recently boilers have moved away from this condition and backed off on temperature a bit. They are not as efficient but more reliable and milder steel may be used in more of the construction.
Frank Z
