Nuclear power plant having steam turbine controller

#1. Field of the Invention

#The present invention relates to a nuclear power plant, and more specifically to a nuclear power plant capable of adjusting the position of a turbine by-pass valve based on the steam pressure generated in a nuclear reactor.

#2. Description of the Related Art

#The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several preferred embodiments of the invention and, together with the description, serve to explain the principles of the invention.

#FIG. 1 is a diagram showing a main steam system and a turbine by-pass system of a nuclear power plant.

#FIG. 2 is a block diagram showing a steam turbine controller for a nuclear power plant.

#Preferred embodiments of a steam turbine controller for a nuclear power plant of the present invention will now be specifically described in more detail with reference to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

#FIG. 3 is a block diagram showing a steam turbine controller for a nuclear power plant according to a first embodiment of the present invention.

#In first embodiment, an element capable of controlling opening/closing such as an ON-OFF controller 14 can operate the turbine by-pass valve 7 even if the regulating controller 13 malfunctions. The ON-OFF controller 14 rapidly opens the fast acting solenoid valve 37 independent from the regulating controller 13 that controls the position of the main steam control valve 6 and the turbine by-pass valve 7.