Decoupled Nuclear Thermal Plant with Off-Site Storage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Nuclear power plants face challenges in load-following capabilities, regulatory burdens, and efficiency due to their design, which limits their flexibility and ability to adapt to changing electricity demand and market opportunities.
Innovation Solution
Reconfiguring a nuclear power plant into a nuclear thermal plant that decouples the reactor from the energy conversion system, allowing for the generation of thermal energy that can be stored and converted into electricity or industrial heat, enabling load-following capabilities and reducing regulatory complexities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a nuclear reactor is connected to a power cycle for converting nuclear thermal energy into electricity, then electricity generation is achieved, but the system loses flexibility and load-following capability
Solution Approach 1:
The system is divided into separate functional modules: a nuclear reactor module that generates thermal energy, a thermal storage module that stores excess thermal energy, and a power generation module that converts thermal energy to electricity. This segmentation allows each module to operate independently, enabling the nuclear reactor to maintain steady operation while the power generation module adjusts output to match demand.
Solution Approach 2:
Thermal energy is stored in advance in the thermal storage system during periods of low electricity demand or when the nuclear reactor produces excess energy. This preliminary storage of thermal energy enables rapid response to peak demand periods without requiring the nuclear reactor to ramp up or down, thus maintaining both base-load operation and load-following capability.
2Power
If a nuclear power plant is designed with complete energy conversion systems on the nuclear island, then power generation capability is maximized, but construction and licensing costs increase significantly
Solution Approach 1:
The energy conversion systems (steam turbines, generators, condensers) are extracted from the nuclear island and relocated to a separate conventional power plant area. Only the nuclear reactor and minimal safety systems remain on the nuclear island, which reduces the scope of nuclear regulatory licensing and inspection while maintaining full power generation capability through the separated conventional power conversion equipment.
Solution Approach 2:
A thermal energy transfer system acts as an intermediary between the nuclear reactor and the conventional power generation system. This intermediary uses heat transfer fluids and heat exchangers to convey thermal energy from the nuclear island to the power conversion systems, enabling functional separation while maintaining energy flow integration.
3Use of energy by moving object
If a nuclear reactor operates at high temperature and pressure to maximize efficiency, then energy conversion efficiency improves, but safety risks and containment requirements increase
Solution Approach 1:
A thermal energy transfer system with heat exchangers serves as an intermediary barrier between the high-temperature, high-pressure nuclear reactor environment and the conventional power generation systems. This intermediary allows efficient thermal energy transfer while physically isolating the hazardous nuclear environment from the rest of the plant, reducing safety risks.
Solution Approach 2:
The system segments the high-risk nuclear environment from the lower-risk power generation environment. By separating the nuclear reactor (operating at high temperature and pressure) from the conventional steam turbine systems, the design concentrates safety requirements to the nuclear island only, while the separated power generation systems operate under less stringent safety conditions.
4Reliability
If a nuclear power plant is designed as an integrated system, then operational reliability is maintained, but the ability to rapidly change output and follow load demand is reduced
Solution Approach 1:
The integrated nuclear power plant is segmented into independently controllable modules: the nuclear reactor module that ensures reliable base-load operation, the thermal storage module that provides energy buffering, and the power generation module that rapidly adjusts output. This modular segmentation maintains overall system reliability while enabling rapid load-following through coordinated module operation.
Solution Approach 2:
The thermal storage system performs preliminary energy storage during low-demand periods, creating an energy buffer that enables the power generation module to rapidly increase output during peak demand without affecting the stable operation of the nuclear reactor. This preliminary action decouples reactor operation from load demand fluctuations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the nuclear power plant's ability to efficiently meet peak demand, reduces construction and licensing costs, and opens up new revenue streams by providing both electricity and heat, improving grid reliability and operational flexibility.
Implementation Method 1
a nuclear power plant can be reconfigured and operated to provide thermal energy, which can be transported off-site to a thermal storage system
Implementation Method 2
The thermal storage system, in turn, can be coupled to an energy conversion plant that converts the thermal energy into industrial heat, electricity, or some other useful purpose
Data Source
AI summary
An integrated energy system includes a nuclear thermal plant situated on a nuclear site. The nuclear thermal plant produces thermal energy that is transported to a thermal energy storage system located outside the nuclear site. The thermal storage system is thermally coupled to a power generation system which is also remote to the nuclear site. By this arrangement, the nuclear thermal plant is isolated and decoupled from the power generation system. The nuclear thermal plant may supply thermal energy upwards of 800° C. or more to be stored at the thermal energy storage system until needed such as for industrial heat, power generation, or other uses. The thermal storage system is source agnostic, and one or more additional thermal energy generators, such as additional nuclear reactors, solar thermal plants, or other thermal energy generators can be coupled to a common thermal storage system and power generation system.