Control and operation of the SUPER PHENIX steam generators

The SUPER-PHENIX steam generators and associated control systems have been computer simulated and laboratory tested on a reduced scale model. Simulation techniques and test results are presented in other papers. This paper describes the design strategy of the project and the expected operational performance for the four parallel-coupled generators. Firstly, the aims of the control and operation studies are discussed, namely, automatic operation over a wide working range, load frequency control, failsafe power setback in case of incidents and reduction of stresses on the generators and associated equipments. Afterwards, the influence of these requirements on establishing operating procedures and the design of generator associated equipments (control system, inlet valves and pumps, protections) are examined. Finally, the principal expected performances in normal and fault operational conditions are described. In particular, the following subjects are dealt with: static and dynamic stability of generators in parallel operation, cold and hot start-up and shut-down; hot standby, large transients, control system and auxiliary equipments failures. (author)