JP2015117721A5 - - Google Patents

Description

Further, in order to achieve the above object, the air or nitrogen supply device of the nuclear power plant of the present invention is connected to a reactor pressure vessel by piping, and is installed in a pressurizer that holds the pressure and water level of the reactor pressure vessel. The steam in the steam generator for supplying cooling water to the reactor pressure vessel is released by connecting to the reactor pressure vessel and a pressurizer relief valve for forcibly reducing the pressure of the pressurizer as necessary. In order to open the main steam relief valve, the cylinder for supplying air or nitrogen stored therein to the pressurizer relief valve and the main steam relief valve to open the pressurizer relief valve, A cylinder that supplies air or nitrogen stored therein to the main steam relief valve, a cylinder that is installed in the middle of each of the pipes, and that supplies the pressurizer relief valve and the main steam relief valve Each first solenoid valve for opening and closing a flow of air or nitrogen to the cylinder to be operated, and each first and second air or nitrogen source for supplying air or nitrogen to each first solenoid valve And an exhaust line of each of the first solenoid valves for switching exhaust from the respective first solenoid valves and supply of air to the respective first solenoid valves, and at the time of power loss, A first switching valve that is switched to a connection with the respective second air or nitrogen source to supply air or nitrogen to the first solenoid valve, and Each isolation valve installed in the middle of the piping of each of the second air or nitrogen supply side and preventing leakage to the supply side of each of the first switching valves. The valve When the first solenoid valve is inoperable, the first solenoid valve is operated and opened by each second power source different from the power source during normal operation. Each of the second solenoid valves for supplying air or nitrogen from an air or nitrogen supply source is provided.

Claims (5)

The gas supply device according to claim 2 ,
A fourth solenoid valve for opening and closing a gas flow from the second switching valve and the third gas supply source is installed on an extension line of the pipe in which the second solenoid valve is installed, When the second power source is lost, the fourth electromagnetic valve is opened to supply gas from the third gas supply source, and the second switching valve is switched from exhaust to supply air, thereby A gas supply device, wherein the isolation valve is opened by operating the electromagnetic valve 2. The gas supply device according to claim 3 , wherein
The third and fourth electromagnetic valves for opening and closing the gas flow of the second and third gas supply sources are via an electromagnetic valve or a manual valve driven by a power source type different from that of the first electromagnetic valve. And a gas supply device connected to each of the pipes. The gas supply device according to claim 3 , wherein
The second and third gas supply source of air, nitrogen, or a gas supply device which is a cylinder in which one of the carbon dioxide stored. A pressurizer relief valve and a reactor connected to a reactor pressure vessel by piping and installed in a pressurizer for maintaining the pressure and water level of the reactor pressure vessel and forcibly reducing the pressure of the pressurizer as necessary A main steam relief valve that is connected to the pressure vessel by piping and supplies steam to the reactor pressure vessel to escape the steam in the steam generator, and is stored inside to open the pressurizer relief valve. A cylinder for supplying air or nitrogen to the pressurizer relief valve and a cylinder for supplying air or nitrogen stored therein to the main steam relief valve to open the main steam relief valve; A first solenoid valve installed in the middle of the pipe for opening and closing a flow of air or nitrogen to a cylinder supplied to the pressurizer relief valve and a cylinder supplied to the main steam relief valve; A first and a second air or nitrogen supply source for supplying air or nitrogen to the first solenoid valve, and an exhaust line of the respective first solenoid valve; Switching between the exhaust from the solenoid valve and the air supply to the respective first solenoid valve, and when the power is lost, the respective second air or nitrogen for supplying air or nitrogen to the respective first solenoid valve Each of the first switching valves to be switched to the connection with the nitrogen supply source, and the respective second air or nitrogen supply source side piping of each of the first switching valves, Each isolation valve for preventing leakage to the supply side of the first switching valve,
The respective isolation valves are operated and opened by respective second power sources different from the power source during normal operation when the respective first solenoid valves are inoperable, and the respective first solenoid valves are opened. An air or nitrogen supply device for a nuclear power plant, comprising a second solenoid valve for supplying air or nitrogen from the second air or nitrogen supply source to the switching valve. In the nuclear plant air or nitrogen supply device according to claim 17 or 19 ,
The third and fourth solenoid valves for opening and closing the second and third air or the air or nitrogen flow of the nitrogen supply source are solenoid valves driven by a power source type different from the first solenoid valve, or An air or nitrogen supply device for a nuclear power plant, which is connected to each of the pipes via a manual valve.