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- W2225202334 abstract "A reactivity control actuator for a high‐power density nuclear propulsion reactor must be installed in close proximity to the reactor core. The energy input from radiation to the actuator structure could exceed hundreds of W/cc unless low‐cross section, low‐absorptivity materials are chosen. Also, for post‐test handling and subsequent storage, materials should not be used that are activated into long half‐life isotopes. Pneumatic actuators can be constructed from various reactor‐compatible materials, but conventional pneumatic piston actuators generally lack the stiffness required for high resolution reactivity control unless electrical position sensors and compensated electronic control systems are used. To overcome these limitations, a pneumatic actuator is under development that positions an output shaft in response to a series of pneumatic pulses, comprising a pneumatic analog of an electrical stepping motor. The pneumatic pulses are generated remotely, beyond the strong radiation environment, and transmitted to the actuator through tubing. The mechanically simple actuator uses a nutating gear harmonic drive to convert motion of small pistons directly to high‐resolution angular motion of the output shaft. The digital nature of this actuator is suitable for various reactor control algorithms but is especially compatible with the three bean salad algorithm discussed by Ball et al. (1991)." @default.
- W2225202334 created "2016-06-24" @default.
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- W2225202334 date "1993-01-01" @default.
- W2225202334 modified "2023-09-27" @default.
- W2225202334 title "A high resolution pneumatic stepping actuator for harsh reactor environments" @default.
- W2225202334 cites W2003628038 @default.
- W2225202334 doi "https://doi.org/10.1063/1.43090" @default.
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