The operating status of home-made supercritical 600MW units being put into operation in recent years has been priliminarily investigated and analysed

the main problem existing in practical operation process of units at present

such as large deviation of economic indices with the designed values

tube-burst frequently occurred in boilers

and other problems related to quality of equipments in manufacture and installation

being presented

and suggestions and recommendations for other problems

which may exist on the units from now on

in aspects of operation

maintenance

and technical retrofit

being put forward.