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Class Information
Number: 976/DIG.146
Name: Nuclear technology > Emergency protection arrangements structally associated with the reactor (e.g., safety valves provided with pressure equalization devices) [g21c-9/00] *** (emergency cooling arrangements dig. 196) > Means for effecting very rapid reduction of the reactivity factor under fault conditions (e.g., reactor fuse, control elements having arrangements activated in an emergency) [g21c-9/02] *** (control elements, per se, dig. 113+)
Description:










Sub-classes under this class:

Class Number Class Name Patents
976/DIG.148 By an absorbant fluid [g21c-9/02d] 7
976/DIG.147 By fast movement of a solid (e.g, pebbles) [g21c-9/02b] 26
976/DIG.149 Reactor fuses [g21c-9/02f] 4
976/DIG.150 Rupture diaphragms [g21c-9/02h] 1


Patents under this class:

Patent Number Title Of Patent Date Issued
5073334 Self-actuated nuclear reactor shutdown system Dec. 17, 1991
5059386 Mechanism for the automatic release of control bars in a nuclear reactor Oct. 22, 1991
5028378 Safety system for a gas cooled high temperature reactor Jul. 2, 1991
4986952 Protection system for protecting a nuclear reactor in the event of a reaction-inhibiting element falling Jan. 22, 1991
4971752 Safety design for nuclear power plants Nov. 20, 1990
4948551 Method of protecting a pressurized water nuclear reactor against failures in its emergency stop means Aug. 14, 1990
4943409 Reactivity control in nuclear reactors Jul. 24, 1990
4880596 Thermionic switched self-actuating reactor shutdown system Nov. 14, 1989
4851183 Underground nuclear power station using self-regulating heat-pipe controlled reactors Jul. 25, 1989
4770845 Self-actuating reactor shutdown system Sep. 13, 1988
4769208 Automatic safety rod for reactors Sep. 6, 1988
4762662 Thermally activated trigger device Aug. 9, 1988
4759903 Apparatus for automatically starting the drop of an absorbing member into a nuclear reactor core Jul. 26, 1988
4747998 Thermally actuated thermionic switch May. 31, 1988
4734252 Nuclear reactor shutdown control rod assembly Mar. 29, 1988
4713210 Control rod driveline and grapple Dec. 15, 1987
4698200 Self-actuated nuclear reactor shutdown system using induction pump to facilitate sensing of core coolant temperature Oct. 6, 1987
4654192 Temperature actuated automatic safety rod release Mar. 31, 1987
4624826 Control rod velocity limiter Nov. 25, 1986
4587084 Control rod drive May. 6, 1986
4582675 Magnetic switch for reactor control rod Apr. 15, 1986
4412968 Nuclear reactor control apparatus Nov. 1, 1983
4411860 Pebble bed reactor with feeding device for absorber material and method for its operation Oct. 25, 1983
4411857 Nuclear reactor control apparatus Oct. 25, 1983
4405558 Nuclear reactor shutdown system Sep. 20, 1983
4372911 Method for flattening the curve of evolution of heat in a fast reactor core Feb. 8, 1983
4312704 Shut-off device blocking spontaneous passage of spherical bulk material especially in quick emptying pipes of pebble bed reactors Jan. 26, 1982
4279697 Method of and apparatus for shutting down a gas-cooled nuclear reactor Jul. 21, 1981
4274920 Water-cooled nuclear reactor with passive emergency shutdown and core cooling capability and on-line refueling Jun. 23, 1981
4187145 Hydraulic latch scram release mechanism Feb. 5, 1980
4054486 Nuclear reactor fail-safe unit having the function of control relay and current regulation Oct. 18, 1977
3932217 Method and device for the passive protection of a nuclear reactor Jan. 13, 1976











 
 
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