Multi-modular power plant with dedicated electrical grid

• US 10,672,528 B2
• Filed: 12/05/2016
• Issued: 06/02/2020
• Est. Priority Date: 12/17/2015
• Status: Active Grant

• Current Assignee: NuScale Power, LLC.
• Original Assignee: NuScale Power, LLC.
• Inventors: Ingersoll, Daniel, Reyes, Jr., Jose N., Galyean, Bill, Doyle, Jeremiah, Hough, Ted, Snuggerud, Ross
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Ly, Xuan
• Application Number:
  US15/369,528
• Publication Number:
  US 20170178756A1
• Time in Patent Office: 1,275 Days
• Field of Search: 307 43
• CPC Class Codes: G21C 1/32 Integral reactors, i.e. reactors wherein parts functionally associated with the reactor but not essential to the reaction, e.g. heat exchangers, are disposed inside the enclosure with the core G21C1/02 - G21C1/30 take precedence
• CPC Class Codes: G21D 1/02 Arrangements of auxiliary equipment
• CPC Class Codes: G21D 3/04 Safety arrangements emergency protection of reactor G21C9/00
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
• CPC Class Codes: Y02E 30/00 Energy generation of nuclear origin
• CPC Class Codes: Y02E 30/30 Nuclear fission reactors

Abstract

A multi-modular power plant includes a plurality of on-site nuclear power modules that generate a power plant output, and a number of power plant systems which operate using electricity associated with a house load of the power plant. A switchyard associated with the power plant may electrically connect the power plant to a distributed electrical grid. The distributed electrical grid may be configured to service a plurality of geographically distributed consumers. Additionally, the switchyard may electrically connect the power plant to a dedicated electrical grid. The dedicated electrical grid may provide electricity generated from the power plant output to a dedicated service load, and the power plant output may be equal to or greater than a combined load of the dedicated service load and the house load. At least a portion of the power plant output may be distributed to both the power plant systems and the dedicated electrical grid.

Claims

1. A multi-modular power plant, comprising:

a plurality of on-site nuclear power modules configured to generate a power plant output;

a number of power plant systems which are configured to operate using electricity associated with a house load of the power plant; and

a switchyard configured to;

electrically connect the power plant output to a distributed electrical grid, wherein the distributed electrical grid is configured to service a plurality of geographically distributed consumers;

electrically connect the power plant output to a dedicated electrical grid connected to a dedicated service load for one of the geographically distributed consumers, wherein the dedicated electrical grid is configured to provide electricity generated from the power plant output to the dedicated service load, and wherein the power plant output is equal to or greater than a combined load of the dedicated service load and the house load; and

distribute at least a portion of the power plant output to both the power plant systems and the dedicated electrical grid;

wherein one or more of the on-site nuclear power modules are configured to generate a first portion of the power plant output, wherein the first portion of the power plant output is equal to or greater than the combined load of the dedicated service load and the house load, and wherein the switchyard is configured to apply the first portion of the power plant output to both the power plant systems and the dedicated electrical grid when the power plant experiences an interruption of power from the distributed electrical grid.

2. The multi-modular power plant of claim 1, wherein the dedicated service load comprises one or more consumers located off-site from the power plant, and wherein the power plant is configured to provide substantially continuous power to the consumers via the dedicated electrical grid during an interruption of power from the distributed electrical grid.

3. The multi-modular power plant of claim 1, wherein the number of power plant systems configured to operate using electricity associated with the house load comprise non-emergency systems, and wherein the power plant further comprises a number of passive emergency systems which are configured to operate without any electricity.

4. The multi-modular power plant of claim 1, wherein a remainder of the on-site nuclear power modules are configured to generate a second portion of the power plant output, and wherein the switchyard is configured to apply the second portion of the power plant output to the distributed electrical grid while the power plant is electrically connected to the distributed electrical grid.

5. The multi-modular power plant of claim 1, wherein the power plant is configured to generate the first portion of the power plant output with a reliability factor of at least 99.9%.

6. The multi-modular power plant of claim 1, wherein the one or more nuclear power modules that generate the first portion of the power plant output are interchangeably selected from the plurality of on-site nuclear power modules in the event that a nuclear power module is unavailable to generate power.

7. The multi-modular power plant of claim 1, wherein the one or more nuclear power modules are selected to generate the first portion of the power plant output according to which of the on-site nuclear power modules have most recently been refueled and achieved a threshold number of days of operation.

8. The multi-modular power plant of claim 1, further comprising an on-site non-nuclear power source configured to provide sufficient power to start one service module when the power plant is disconnected from the distributed electrical grid and all of the on-site nuclear power modules have been shut down, and wherein the one service module is configured to provide sufficient power to start a second nuclear power module while the power plant is disconnected from the distributed electrical grid.

9. The multi-modular power plant of claim 1, wherein the switchyard comprises a double-bus configuration that provides for alternate electrical pathways to deliver the power plant output to the dedicated service load.

10. A method of operating a multi-modular power plant comprising a plurality of on-site nuclear power modules, the method comprising:

generating a power plant output by one or more of the on-site nuclear power modules;

providing electricity to a number of non-emergency power plant systems associated with a house load of the power plant;

electrically connecting the power plant output to a distributed electrical grid, wherein the distributed electrical grid is configured to service a plurality of geographically distributed consumers;

electrically connecting the power plant output to a dedicated electrical grid connected to a dedicated service load for one of the geographically distributed consumers, wherein the dedicated electrical grid is configured to provide electricity generated from the power plant output to the dedicated service load, and wherein the power plant output is equal to or greater than a combined load of the dedicated service load and the house load;

identifying one or more grid irregularities associated with the distributed electrical grid;

distributing at least a portion of the power plant output to both the non-emergency power plant systems and the dedicated electrical grid in response to identifying the one or more grid irregularities; and

selecting one or more of the on-site nuclear power modules to generate a first portion of the power plant output, wherein the first portion of the power plant output is equal to or greater than the combined load of the dedicated service load and the house load, and wherein the first portion of the power plant output is distributed to both the non-emergency power plant systems and the dedicated electrical grid during an interruption of power from the distributed electrical grid.

11. The method of claim 10, further comprising:

placing the remaining nuclear power modules in turbine bypass during the interruption of power from the distributed electrical grid, wherein the remaining nuclear power modules are configured to generate a second portion of the power plant output; and

dissipating the second portion of the power plant output while the first portion of the power plant output is distributed to both the non-emergency power plant systems and the dedicated electrical grid.

12. The method of claim 11, further comprising:

determining that the interruption of power from the distributed electrical grid has concluded;

bringing back on-line one or more of the remaining power modules; and

providing at least part of the second portion of the power plant output to the distributed electrical grid.

13. The method of claim 10, wherein the one or more nuclear power modules are selected to generate the first portion of the power plant output according to which nuclear power module has most recently been refueled and achieved a threshold number of days of operation.

14. A multi-modular power plant, comprising:

means for generating electricity from a power plant output provided by one or more of a plurality of on-site nuclear power modules, wherein at least a portion of the electricity is provided to a number of power plant systems associated with a house load of the power plant;

means for electrically connecting the power plant to a distributed electrical grid, wherein the distributed electrical grid is configured to service a plurality of geographically distributed consumers;

means for electrically connecting the power plant to a dedicated electrical grid, wherein the dedicated electrical grid is configured to provide electricity generated from the power plant output to a dedicated service load, and wherein the power plant output is equal to or greater than a combined load of the dedicated service load and the house load;

means for distributing at least a portion of the power plant output to both the non-emergency power plant systems and the dedicated electrical grid;

means for placing some of the nuclear power modules in turbine bypass during an interruption of power from the distributed electrical grid; and

means for determining that the interruption of power from the distributed electrical grid has concluded, wherein one or more of the power modules are brought back on-line in response to determining that the interruption of power has concluded, and wherein at least part of the power plant output is provided to the distributed electrical grid after the one or more power plants have been brought back on-line.

15. The power plant of claim 14, further comprising means for selecting one or more of the on-site nuclear power modules to generate a first portion of the power plant output, wherein the first portion of the power plant output is equal to or greater than the combined load of the dedicated service load and the house load, and wherein the first portion of the power plant output is distributed to both the non-emergency power plant systems and the dedicated electrical grid during an interruption of power from the distributed electrical grid.

16. The power plant of claim 15, further comprising means for placing a remainder of the nuclear power modules in turbine bypass during the interruption of power from the distributed electrical grid, wherein the remaining nuclear power modules are configured to generate a second portion of the power plant output, and wherein the second portion of the power plant output is dissipated via the turbine bypass while the first portion of the power plant output is distributed to both the non-emergency power plant systems and the dedicated electrical grid.

17. The power plant of claim 16, wherein one or more of the remaining power modules are brought back on-line in response to determining that the interruption of power has concluded, and wherein at least part of the second portion of the power plant output is provided to the distributed electrical grid after the one or more remaining power plants have been brought back on-line.

18. The power plant of claim 15, wherein the one or more nuclear power modules are selected to generate the first portion of the power plant output according to which nuclear power module has most recently been refueled and achieved a threshold number of days of operation.