Steam turbine controller for nuclear power plant

摘要

A steam turbine control device. A main steam system runs between a nuclear reactor and a steam turbine and includes a main steam isolation valve (MSIV), a main steam control valve, and a turbine by-pass system with a turbine by-pass valve A calculating means generates a main steam pressure control signal and a reactor dome pressure control signals. A pressure control signal changeover means changes a pressure control signal from the reactor dome pressure signal to the main steam pressure signal when the MSIV closes to restrain the abrupt decrease of steam in the main steam system effectively.