Boiling water type nuclear power plant
First Claim
1. A boiling water nuclear power plant comprising:
- a nuclear reactor building including a reactor containment vessel and a reactor pressure vessel;
an external building which is installed independently outside the nuclear reactor building, which includes a power source and an operating panel independent of the nuclear reactor building, and which has an anti-hazard property;
a water injection pump installed inside the external building;
a water injection pipe configured to perform water injection on at least the reactor pressure vessel or the reactor containment vessel in the nuclear reactor building from the water injection pump; and
a valve connected to the water injection pipe;
wherein the valve connected to the water injection pipe includes valves arranged inside the nuclear reactor building and valves arranged outside the nuclear reactor building, and the valves arranged inside the nuclear reactor building include a valve operated to be kept constantly open and a check valve which are arranged outside the reactor containment vessel; and
wherein the check valve allows water injection from the outside into the nuclear reactor building and prevents backward flow.
1 Assignment
0 Petitions
Accused Products
Abstract
To more reliably supply cooling water to a reactor pressure vessel and a reactor containment vessel using a back-up building if a severe accident should occur, a boiling water type nuclear power plant includes a nuclear reactor building including a reactor containment vessel, and an external building, which is installed independently outside the nuclear reactor building and which has an anti-hazard property. The external building has a power source and an operating panel independent of the nuclear reactor building. The boiling water type nuclear power plant includes a water injection pump installed inside the external building, an alternative water injection pipe performing water injection at least on a reactor pressure vessel or the reactor containment vessel in the nuclear reactor building from the water injection pump, and a valve connected to the alternative water injection pipe, making it possible to perform alternative water injection if a severe accident occurs.
2 Citations
16 Claims
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1. A boiling water nuclear power plant comprising:
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a nuclear reactor building including a reactor containment vessel and a reactor pressure vessel; an external building which is installed independently outside the nuclear reactor building, which includes a power source and an operating panel independent of the nuclear reactor building, and which has an anti-hazard property; a water injection pump installed inside the external building; a water injection pipe configured to perform water injection on at least the reactor pressure vessel or the reactor containment vessel in the nuclear reactor building from the water injection pump; and a valve connected to the water injection pipe; wherein the valve connected to the water injection pipe includes valves arranged inside the nuclear reactor building and valves arranged outside the nuclear reactor building, and the valves arranged inside the nuclear reactor building include a valve operated to be kept constantly open and a check valve which are arranged outside the reactor containment vessel; and wherein the check valve allows water injection from the outside into the nuclear reactor building and prevents backward flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A boiling water nuclear power plant comprising:
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a nuclear reactor building including a reactor containment vessel and a reactor pressure vessel; an external building which is installed independently outside the nuclear reactor building, which includes a power source and an operating panel independent of the nuclear reactor building, and which has an anti-hazard property; a water injection pump installed inside the external building; a water injection pipe configured to perform water injection on at least the reactor pressure vessel or the reactor containment vessel in the nuclear reactor building from the water injection pump; and a valve connected to the water injection pipe; wherein the valve connected to the water injection pipe includes valves arranged inside the nuclear reactor building and valves arranged outside the nuclear reactor building, the valves arranged inside the nuclear reactor building including a valve operated to be kept constantly open and a check valve which are arranged outside the reactor containment vessel, and the valves arranged inside the nuclear reactor building are connected to a water injection port inside the nuclear reactor building via an up-grade water injection pipe; wherein the check valve allows water injection from the outside into the nuclear reactor building and prevents backward flow; and a water discharge mechanism including a flow rate restrictor is provided at the lowermost point of the up-grade water injection pipe in the nuclear reactor building. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification