Minimization of hydrogen concentration in the superheated mixture at steam turbine working fluid overheating by mixing with higherature products of hydrogen in oxygen combustion at nuclear power plant

Abstract

A new design of hydrogen-oxygen superheater with hybrid cooling of the combustion chamber with feed water and lowerature steam is proposed for smoothening the cooling process in order to reduce the residual hydrogen content in the process steam. The combustion chamber at this design consists of two parts. In the first part, external cooling with feed water is used for smooth cooling of combustion products to 1900 ... 2100 K in the most thermally stressed zone. In the second part, lowerature steam is used as coolant for external cooling, the temperature of the generated higherature steam is reduced down to 1400 ... 1500 K. Finally, the obtained higherature steam is mixed with the working fluid.