Induced nuclear reactions: processes – systems – and elements – With control of reactor – Sensing or detecting device attached to – embedded in – or...
Patent
1989-06-01
1991-12-31
Stoll, Robert L.
Induced nuclear reactions: processes, systems, and elements
With control of reactor
Sensing or detecting device attached to, embedded in, or...
376245, 376258, G21C 700
Patent
active
050769960
ABSTRACT:
A system for monitoring an operating condition of a control rod drive mechanism (CRDM) having a pressure housing erectly mounted on a reactor vessel head closure, a vertically movable control rod drive shaft accommodated in the housing and an electromagnetically motive latch mechanism includes an accelerometer fitted to a housing upper end and signal recording means for receiving output signals from the accelerometer through signal processing means and recording the processed output signals. A system for monitoring and analyzing an operating condition of an electromagnetically driven CRDM having a lifting electromagnetic coil, a stationary gripper electromagnetic coil and a movable gripper electromagnetic coil includes a detector, fitted to the CRDM, for detecting vibrations caused by operation of the drive mechanism, a buffer amplifier for receiving current, and detection and control signals, a pre-processing unit for digitalizing these signals, and a processing unit for analytically processing both the current and detection signals.
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"Vibration Measurements in a Three-Loop Pressurized Water Reactor-Instrumentation, Analysis, and Results"; Dietrich Haensel; ISA Transactions, vol. 11, No. 4 (1972), pp. 299-303.
Miyaguchi Jinichi
Murakawa Shinichi
Takada Yoshinori
Yatabe Hiroshi
Bhat N.
Mitsubishi Jukogyo Kabushiki Kaisha
Stoll Robert L.
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