Safety circuit for a frequently, in particular of valves in parallel-connected bypass channel - or outlet lines for the steam in core reactor steam producer

摘要

A turbine follow system and method for pressurized water reactors with a multiplicity of load bypass valves to provide a substitute load upon a load rejection by shunting excess steam around the load to a condenser. The system provides a circuit whereby not more than one valve is opened on any one system or operator error by utilizing circuit redundancy and a permissive gate operated by one of the redundant circuits.