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@ -323,45 +323,50 @@ ___________________________________________________________
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### Goals:
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### Goals:
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The goal of this research is to create an adaptive controller
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The goal of this research is to create an adaptive
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that can adjust to system dynamics changes over time to maintain
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controller for a reactor control system that can adjust to
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an optimal control, while using formal methods to provide strong
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system dynamics changes from component degredation or
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safety guarantees about the malleable control law.
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post-maintenance effects to maintain an optimal control,
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while using formal methods to provide strong safety
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guarantees that all adaptations remain within verified
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safety limits.
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### Outcomes:
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### Outcomes:
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For this research to be successful, I will accomplish the
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For this research to be successful, I will accomplish the
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following:
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following:
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- Create a simulation suite for the Small Modular Advanced High
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1. Create a simulation suite for the Small Modular Advanced
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Temperature Reactor (SmAHTR) to simulate component degradation
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High Temperature Reactor (SmAHTR) to simulate component
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such as heat exchanger blockages and fuel concentration burn-up.*
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degradation such as heat exchanger fouling or chemistry
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changes following maintenance.
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- Create an adaptive control rod controller to maximize load following
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2. Create a parameter adaptive control rod controller to maximize
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precision for a simulated power grid demand.
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load following precision for a simulated power grid
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demand.
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- Use contract based verification at runtime to ensure that
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3. Use contract based verification at runtime to ensure that
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learned parameters for the adaptive controller remain within
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learned parameters for the adaptive controller remain
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safety specification limits
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within safety specification limits.
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*Is this actually even a problem for SmAHTR? Figuring the fuel is
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suspended in the salt I'd assume chemistry is pretty strictly
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controlled. I'm sure I can find other examples.
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### Impact:
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### Impact:
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Certain reactor control systems are already automatic systems,
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Many reactor control systems already automate steady-state
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such as constant temperature or pressure controls for operating
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operation and basic load-following, but their performance
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at steady state. These simple controllers are able to follow load
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degrades over time as plant equipment wears or is replaced.
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changes from the power grid on their own, but over will lose
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Without retuning, controllers may become less efficient,
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efficiency as the underlying plant mechanics become less
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leading to suboptimal thermal efficiency, reduced grid
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efficient, or maintenance is performed and components are
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responsiveness, and unnecessary operational margins that can
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refreshed. For nuclear power contexts, fine control is ideal to
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lead to unnecessary shutdowns. Adaptive control can address
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maximize profits and to minimize energy wasteage. This is not an
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these challenges by continuously tuning control parameters
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easy problem to solve, however, as the dynamics of the underlying
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to match the evolving plant dynamics. However, without
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plant are constantly changing. Adaptive control can help address
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provable safety guarantees, such adaptation is unlikely to
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this issue, but learnable controllers must come with guarantees
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be accepted in high-assurance domains without proof of
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of safety in order to be attractive to the nuclear industry.
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controller safety. By embedding formal, contract-based
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verification into the adaptation process, this work will
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enable the use of responsive and efficient control
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strategies that maintain regulatory compliance while
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improving plant performance and availability.
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### Related Papers:
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### Related Papers:
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