Control switching device

Patent metadata

Field	Value
Publication number	US-2023352200-A1
Application number	US-202018245007-A
Country	US
Kind code	A1
Filing date	Nov 30, 2020
Priority date	Nov 30, 2020
Publication date	Nov 2, 2023
Grant date	—

Abstract

This control switching device includes: a first operating panel provided at a first place and having A 1 , A 2 buttons connected to a first control device and B 1 , B 2 buttons connected to a second control device; and a second operating panel provided at a second place and having a 1 , a 2 buttons connected to the first control device and b 1 , b 2 buttons connected to the second control device. The first control device includes a first determination circuitry which determines whether to shut down input/output to/from an input/output device located at the first place, using operation signals of the A 1 , A 2 , B 1 , B 2 buttons from the first operating panel. The second control device also includes a second determination circuitry similar to the first determination circuitry.

First claim

1 . A control switching device for switching input/output to/from duplicated control devices from an input/output device located at a first place to an input/output device located at a second place, the control switching device comprising:
a first operating panel having an A 1 button and an A 2 button connected to a first control device as the control device, and a B 1 button and a B 2 button connected to a second control device as the control device, the first operating panel being provided at the first place; a second operating panel having an a 1 button and an a 2 button connected to the first control device, and a b 1 button and a b 2 button connected to the second control device, the second operating panel being provided at the second place; and a network via which an operation signal of each button is sent/received between the first control device and the second control device, wherein the first control device includes first determination circuitry which determines whether or not to shut down input/output between the first control device and the input/output device located at the first place, on the basis of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel, and determines whether or not to start input/output between the first control device and the input/output device located at the second place, on the basis of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel, and the second control device includes second determination circuitry which determines whether or not to shut down input/output between the second control device and the input/output device located at the first place, on the basis of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel, and determines whether or not to start input/output between the second control device and the input/output device located at the second place on the basis of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel.

2 . The control switching device according to claim 1 , wherein
the first control device enables button operation on the second operating panel only in a case where input/output between the first control device and the input/output device located at the first place is shut down, and the second control device enables button operation on the second operating panel only in a case where input/output between the second control device and the input/output device located at the first place is shut down.

3 . The control switching device according to claim 1 , wherein
the first determination circuitry
determines to shut down input/output between the first control device and the input/output device located at the first place, when two or more of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel are received, and
determines to start input/output between the first control device and the input/output device located at the second place, when two or more of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel are received, and
the second determination circuitry
determines to shut down input/output between the second control device and the input/output device located at the first place, when two or more of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel are received, and
determines to start input/output between the second control device and the input/output device located at the second place, when two or more of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel are received.

4 . The control switching device according to claim 1 , wherein
the first determination circuitry
determines to shut down input/output between the first control device and the input/output device located at the first place, when two or more of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel are received and the operation signal of either the A 1 button or the A 2 button is received, and
determines to start input/output between the first control device and the input/output device located at the second place, when two or more of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel are received, and
the second determination circuitry
determines to shut down input/output between the second control device and the input/output device located at the first place, when two or more of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel are received and the operation signal of either the B 1 button or the B 2 button is received, and
determines to start input/output between the second control device and the input/output device located at the second place, when two or more of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel are received.

5 . The control switching device according to claim 1 , wherein
all the buttons are configured to be physically, electrically, and functionally separate and independent of each other, the first determination circuitry
determines to shut down input/output between the first control device and the input/output device located at the first place, when three or more of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel are received, and
determines to start input/output between the first control device and the input/output device located at the second place, when three or more of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel are received, and
the second determination circuitry
determines to shut down input/output between the second control device and the input/output device located at the first place, when three or more of the operation signals of the A 1 button, the A 2 button, the B 1 button, and the B 2 button from the first operating panel are received, and
determines to start input/output between the second control device and the input/output device located at the second place, when three or more of the operation signals of the a 1 button, the a 2 button, the b 1 button, and the b 2 button from the second operating panel are received.

6 . The control switching device according to claim 1 , wherein
the first place is a main control room of a nuclear power plant, and the second place is remote shutdown equipment located outside the main control room.

7 . The control switching device according to claim 1 , wherein
the first control device and the second control device are control devices of a safety facility of a nuclear power plant.

8 . The control switching device according to claim 4 , wherein
the first operating panel and the second operating panel are operating panels for performing permissive manual operation for performing block operation of a nuclear reactor trip function of a nuclear power plant.

9 . The control switching device according to claim 2 , wherein
the first determination circuitry
determines to shut down input/output between the first control device and the input/output

Assignees

• Mitsubishi Electric Corp

Inventors

• Hamaya Yoichiro

Classifications

• G21D3/06

  responsive to faults within the plant (in the reactor G21C9/00) · CPC title

• G21D3/04 Primary

  Safety arrangements (emergency protection of reactor G21C9/00) · CPC title

• Y02E30/00

  Energy generation of nuclear origin · CPC title