MULTI-MODULAR POWER PLANT WITH OFF-GRID POWER SOURCE

• US 20170178757A1
• Filed: 12/02/2016
• Published: 06/22/2017
• Est. Priority Date: 12/17/2015
• Status: Active Grant

• Current Assignee: NuScale Power, LLC. (Fluor Enterprises, Inc.)
• Original Assignee: NuScale Power, LLC. (Fluor Enterprises, Inc.)
• Inventors: HOUGH, Ted, SNUGGERUD, Ross
• Granted Patent: US 10,510,455 B2
• Time in Patent Office: Days
• 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 1/00 Details of nuclear power plant control G21D3/00
• CPC Class Codes: G21D 3/001 Computer implemented control
• CPC Class Codes: G21D 3/008 Man-machine interface, e.g. control room layout
• CPC Class Codes: G21D 3/04 Safety arrangements emergency protection of reactor G21C9/00
• 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 may include a plurality of on-site nuclear power modules configured to generate a power plant output, wherein one or more of the nuclear power modules may be designated as service module units which are configured to generate a first portion of the power plant output. A remainder of the nuclear power modules may be configured to generate a second portion of the power plant output. A number of power plant systems may be configured to operate using electricity associated with a house load of the power plant, wherein the first portion of the power plant output is equal to or greater than the house load. Additionally, a switchyard may be configured to 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, and the switchyard may be configured to apply the second portion of the power plant output to the distributed electrical grid. The switchyard may further be configured to apply at least part of the first portion of the power plant output to the power plant systems during a loss of power from the distributed 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, wherein one or more of the nuclear power modules are designated as service module units which are configured to generate a first portion of the power plant output, and wherein a remainder of the nuclear power modules are configured to generate a second portion of the 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, wherein the first portion of the power plant output is equal to or greater than the house load; and

a switchyard configured to electrically connect the power plant to a distributed electrical grid, wherein the distributed electrical grid is configured to service a plurality of geographically distributed consumers, wherein the switchyard is configured to apply the second portion of the power plant output to the distributed electrical grid, and wherein the switchyard is further configured to apply at least part of the first portion of the power plant output to the power plant systems during a loss of power from the distributed electrical grid.

2. 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.

3. The multi-modular power plant of claim 1, wherein the switchyard is further configured to electrically connect the power plant to a dedicated electrical grid, wherein the dedicated electrical grid is configured to provide electricity to a dedicated service load, wherein the first portion of the power plant output is equal to or greater than a combined load of the dedicated service load and the house load, and wherein the switchyard is configured to distribute the first portion of the power plant output to both the power plant systems and the dedicated service load when the power plant is electrically disconnected from the distributed electrical grid.

4. The multi-modular power plant of claim 3, 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 uninterrupted power to the consumers during the loss of power from the distributed electrical grid.

5. The multi-modular power plant of claim 1, wherein the switchyard is configured to restrict the power plant from receiving electricity from the distributed electrical grid while the power plant is operating in a power output-only mode, and wherein the switchyard is configured to output the second portion of the power plant output to the distributed electrical grid while the power plant is operating in the power output-only mode.

6. The multi-modular power plant of claim 1, wherein in response to the power plant being electrically disconnected from the distributed electrical grid, the remainder of the nuclear power modules are placed in turbine bypass to dissipate the second portion of the power plant output while the service modules continue to generate the first portion of the power plant output to service the house load.

7. The multi-modular power plant of claim 1, wherein the designation of the service modules is interchangeably applied to the nuclear power modules according to a predetermined time interval.

8. The multi-modular power plant of claim 1, wherein the designation of the service modules is applied to the one or more nuclear power modules which have most recently been refueled and achieved a threshold number of days of operation.

9. 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 electrically disconnected from the distributed electrical grid and all of the 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.

10. The multi-modular power plant of claim 9, wherein all of the nuclear power modules are sequentially started until the power plant is operating at full power.

11. A method of operating a multi-modular power plant comprising a plurality of on-site nuclear power modules configured to generate a power plant output, the method comprising:

generating a first portion of the power plant output by one or more of the nuclear power modules designated as service module units, wherein a remainder of the nuclear power modules are non-service module units;

generating a second portion of the power plant output by the non-service module units;

providing electricity to a number of non-emergency power plant systems associated with a house load of the power plant, wherein the first portion of the power plant output is equal to or greater than the house load;

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;

outputting an amount of electricity corresponding to the second portion of the power plant output to the distributed electrical grid in a first mode of operation in which the power plant is connected to the distributed electrical grid;

diverting the second portion of the power plant output away from the distributed electrical grid in a second mode of operation in which the power plant experiences an interruption of power from the distributed electrical grid; and

routing an amount of electricity corresponding to at least part of the first portion of the power plant output to the power plant systems in the second mode of operation.

12. The method of claim 11, further comprising:

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

distributing the first portion of the power plant output to both the power plant systems and the dedicated service load while the power plant experiences the interruption of power from the distributed electrical grid.

13. The method of claim 11, further comprising:

restricting the power plant from receiving electricity from the distributed electrical grid; and

outputting the amount of electricity corresponding to the second portion of the power plant output to the distributed electrical grid while the power plant is restricted from receiving electricity from the distributed electrical grid.

14. The method of claim 11, further comprising:

placing the remainder of the nuclear power modules in turbine bypass when the power plant is electrically disconnected from the distributed electrical grid; and

dissipating the second portion of the power plant output while the service module units continue to generate the first portion of the power plant output to service the house load.

15. The method of claim 11, further comprising interchangeably designating the nuclear power modules as service module units according to a predetermined time interval.

16. The method of claim 11, wherein the one or more nuclear power modules are designated as service module units according to which nuclear power module has most recently been refueled and achieved a threshold number of days of operation.

17. The method of claim 11, further comprising:

generating an initial power output from an on-site non-nuclear power source prior to generating the first and second portions of the power plant output, wherein the initial power output is generated while the power plant is electrically disconnected from the distributed electrical grid;

applying the initial power output to start a first nuclear power module;

generating subsequent power output from the first nuclear power module; and

applying the subsequent power output to start a second nuclear power module while the power plant is electrically disconnected from the distributed electrical grid.

18. The method of claim 17, further comprising sequentially starting additional nuclear power modules until the power plant is operating at full power.

19. A multi-modular power plant, comprising:

means for generating electricity from a first portion of a power plant output provided by one or more of a plurality of on-site nuclear power modules designated as service module units, wherein a remainder of the plurality of nuclear power modules are non-service module units, and wherein the first portion of the power plant output is equal to or greater than a house load associated with a number of non-emergency power plant systems;

means for generating electricity from a second portion of the power plant output provided by the non-service module units;

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, and wherein an amount of electricity corresponding to the second portion of the power plant output is provided to the distributed electrical grid while the power plant is electrically connected to the distributed electrical grid;

means for diverting the second portion of the power plant output away from the distributed electrical grid when the power plant experiences an interruption of power from the distributed electrical grid; and

means for routing an amount of electricity corresponding to at least part of the first portion of the power plant output to the power plant systems while the power plant is electrically disconnected from the distributed electrical grid.

20. The multi-modular power plant of claim 19, further comprising:

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

means for distributing the first portion of the power plant output to both the power plant systems and the dedicated service load while the power plant is electrically disconnected from the distributed electrical grid.