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Motion Systems » Engineered Systems » Regulating Rod
Regulating Rod

A linear actuator and attendant controller was designed for the National Center for Neutron Research (NCNR) at NIST in Gaithersburg, MD, to position their nuclear reactor’s graphite regulating rod with 1/8” accuracy over a 29” range.  The objective was to provide an upgraded replacement for the previous actuator, which had been in use for decades.  To fit the reactor, the actuator was designed with a maximum body diameter of only 2.75”.  Compatibility was maintained with old systems by using an identical upper flange and electrical connector, along with an identical interface to the regulating rod.  The actuator hangs inside the reactor vessel by its upper flange and attaches to the regulating rod at its lower end.

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