Method and apparatus for real-time learning-based augmented irradiation control and optimization

Patent metadata

Field	Value
Publication number	US-12106865-B2
Application number	US-202117236852-A
Country	US
Kind code	B2
Filing date	Apr 21, 2021
Priority date	May 18, 2020
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A machine-learning tool learns from sensors' data of a nuclear reactor at steady state and maps them to controls of the nuclear reactor. The tool learns all given ranges of normal operation and responses for corrective measures. The tool may train another learning tool (or the same tool) that forecasts the behavior of the reactor based on real-time changes (e.g., every 10 seconds). The tool implements an optimization technique for differing half-life materials to be placed in the reactor. The tool maximizes isotope production based on optimal controls of the reactor.

First claim

What is claimed is:

1. A machine-readable storage medium having machine-readable instructions that, when executed, cause one or more machines to perform a method to improve an operation of a nuclear reactor by monitoring an alarm threshold to prevent unplanned shutdown of the nuclear reactor to increase an isotope production, the method comprising:
collecting data from sensors of the nuclear reactor at a steady state condition;
training an optimization model with multiple objectives using the collected data, wherein the optimization model uses one or more machine-learning algorithms configured to:
learn patterns by mapping the collected data to a set of controls of the nuclear reactor, wherein the set of controls are associated with a control panel of the nuclear reactor, wherein the set of controls include one or more controls to: adjust movement of a control rod, modify operating modes, change primary cooling flow rate, change secondary cooling flow rate, adjust cooling fan speed, adjust ventilation rate, or adjust differential pressure; and
learn a setting of the set of controls that increases the isotope production from the predicted learned patterns;

reporting whether an output from the sensors of the nuclear reactor is above or below the alarm threshold; and
predicting, by processing the collected data via the trained optimization model, operational issues with the nuclear reactor to avoid the unplanned shutdown of the nuclear reactor to increase the isotope production, wherein training the optimization model comprises applying one or more supervised machine-learning algorithms by analyzing and learning the collected data to:
determine a location for placement of a sample in the nuclear reactor;
schedule for the isotope production from the sample; and
adjust the set of controls, via application of the trained optimization model by a computer, to reduce disruption of the schedule which in turn minimizes the unplanned shutdowns of the nuclear reactor to increase the isotope production.

2. The machine-readable storage medium of claim 1 ,
wherein the control rod includes one of a transient rod, a safe rod, a shim rod, and/or a regulating rod; and wherein the operating modes include auto mode, manual mode, pulse mode, and jump mode.

3. The machine-readable storage medium of claim 1 , wherein the optimization model applies one or more parameters which include at least one of:
radioactivity produced; a number of target atoms irradiated an absorption cross section; a thermal neutron flux; an epithermal neutron flux; a fast neutron flux; a decay constant; or an activation or irradiation time.

4. The machine-readable storage medium of claim 1 , wherein the collected data includes:
a temperature of primary and secondary cooling heat exchanger inlet and outlet;
a power range;
an area radiation;
a reactor bay air particulate and gas;
a stack air particulate and gas;
a primary cooling level and conductivity; and
data associated with power channels including wide-range channel, log channel, linear channel, period channel, and safety channel.

5. The machine-readable storage medium of claim 1 , wherein the sensors include:
temperature sensors of heat exchanger inlet and outlet;
a power range monitor;
power channels;
area radiation monitors;
a reactor bay air particulate and gas monitor; and
a stack air particulate and gas monitor.

6. The machine-readable storage medium of claim 1 , wherein the nuclear reactor is configured for a production of Mo-99.

7. The machine-readable storage medium of claim 1 , wherein the nuclear reactor is a research or test reactor.

8. The machine-readable storage medium of claim 1 , wherein to train the optimization model comprises applying a deep learner.

9. A method to improve an operation of a nuclear reactor by monitoring an alarm threshold to prevent unplanned shutdown of the nuclear reactor to increase an isotope production, the method comprising:
collecting data from sensors of the nuclear reactor at a steady state condition;
training an optimization model with multiple objectives using the collected data, wherein the optimization model uses one or more machine-learning algorithms configured to:
learn patterns by mapping the collected data to a set of controls variables of the nuclear reactor, wherein the set of controls is associated with a control panel of the nuclear reactor, wherein the set of controls include one or more controls to: adjust movement of a control rod, modify operating modes, change primary cooling flow rate, change secondary cooling flow rate, adjust cooling fan speed, adjust ventilation rate, or adjust differential pressure; and
learn the set of controls that increases the isotope production from the learned patterns;

reporting whether an output from the sensors of the nuclear reactor is above or below the alarm threshold; and
predicting, by processing the collected data via the trained optimization model, operational issues with the nuclear reactor to avoid the unplanned shutdown of the nuclear reactor to increase the isotope production, wherein training the optimization model comprises applying one or more supervised machine-learning algorithms by analyzing and learning the collected data to:
determine a location for placement of a sample in the nuclear reactor;
schedule for the isotope production from the sample; and
adjust the set of controls, via application of the trained optimization model by a computer, to reduce disruption of the schedule which in turn reduces the unplanned shutdowns of the nuclear reactor to increase the isotope production.

10. The method of claim 9 , wherein the sensors include:
temperature sensors of a heat exchanger inlet and outlet;
a power range monitor;
power channels;
area radiation monitors;
a reactor bay air particulate and gas monitor; and
a stack air particulate and gas monitor.

Assignees

• Univ Oregon State

Inventors

• Reese Steven R
• Frieder Ophir
• Gomez Fernandez Mario Enrique

Classifications

• G21G1/02

  in nuclear reactors (by thermonuclear reactions G21B; conversion of nuclear fuel G21C) · CPC title

• G21D3/002

  Core design; core simulations; core optimisation · CPC title

• G21C23/00

  Adaptations of reactors to facilitate experimentation or irradiation · CPC title

• G21C7/26

  by displacement of the moderator or parts thereof {by changing the moderator concentration} · CPC title

• G21C17/00

  Monitoring; Testing (measuring in general G01); {Maintaining} · CPC title