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U.S. Department of Energy
Office of Scientific and Technical Information

Control-rod assembly for nuclear reactors

Patent ·
OSTI ID:4350485
An assembly comprising a stationary thimble and a cortrol rod having a neutron-absorbing portion is displaceable vertically between a bottom position in which the absorbing portion is placed within the reactor core and a top position in which it is placed outside the core. The thimble is provided both beneath and above the reactor core with apertures for the admission and discharge of coolant and with a control-rod guide bearing located above the level of the reactor core. The clearance left by the bearing between the control rod and the thimbie is sufficiently small to ensure that the coolant flow between these latter is a small fraction of the flow which passes through the neutron-absorbing portion. (Official Gazette)
Research Organization:
Originating Research Org. not identified
NSA Number:
NSA-29-014875
OSTI ID:
4350485
Report Number(s):
US 3773617
Country of Publication:
France
Language:
English