Apparatus and method for transferring nuclear reactor fuel assem

Details Apparatus and method for transferring nuclear reactor fuel assem Apparatus and method for transferring nuclear reactor fuel assem

1988-09-30

1990-01-16

Wasil, Daniel

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

Refueling machines

212149, 340685, G21C 1910

Patent

active

048948497

ABSTRACT:
A system for transferring fuel assemblies in a nuclear reactor includes a load control system which compares the current load to the more restrictive of fixed overload and underload limits, and instantaneous overload and underload limits continuously calculated from a running average of the measured load. Operation of the refueling machine is terminated if any of these limits are exceeded. The system also accommdates for changes in buoyancy and tension loading applied by spring loaded reels for pneumatic hoses and electrical cables servicing the gripper which engages the fuel assembly as the mast supporting the fuel assembly is raised and lowered in the pool of shielding water covering the reactor core. The current and recent suspended load measurements are displayed relative to the fixed and instantaneous overload and underload limits on a graphic display along with speed and other pertinent data.

REFERENCES:
patent: 3740741 (1971-06-01), Jones
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patent: 3913081 (1975-10-01), Hamilton
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patent: 4487741 (1984-12-01), Vackovich et al.
patent: 4532595 (1985-07-01), Wilhelm
patent: 4761107 (1988-08-01), Franti
patent: 4781882 (1988-11-01), Salton et al.

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