Abstract: A method and circuitry for checking the programming (P) and deletion (L) operations of memory cells (5) in a nonvolatile memory device (1). Parallel to the programming (P) or deletion (L) operations of the actual memory cells (5) the respective programming or deletion process is carried out on at least one similar checking cell (4.1, 4.2, 4.3), with the programming (P) or deletion (L) operations being less favorable by a defined extent than the programming (P) or deletion (L) operations of the actual memory cells (5). From the content of the checking cell (4.1, 4.2, 4.3) an evaluation device (6) determines whether the programming (P) or deletion (L) operation was successful or not, and a corresponding output signal (ak) indicative thereof is produced.

Abstract: A method and circuitry for checking the programming (P) and deletion (L) operations of memory cells (5) in a nonvolatile memory device (1). Parallel to the programming (P) or deletion (L) operations of the actual memory cells (5) the respective programming or deletion process is carried out on at least one similar checking cell (4.1, 4.2, 4.3), with the programming (P) or deletion (L) operations being less favorable by a defined extent than the programming (P) or deletion (L) operations of the actual memory cells (5). From the content of the checking cell (4.1, 4.2, 4.3) an evaluation device (6) determines whether the programming (P) or deletion (L) operation was successful or not, and a corresponding output signal (ak) indicative thereof is produced.

Abstract: A memory device comprises at least one electrically erasable and programmable non-volatile memory cell, a bistable flip-flop, connected in parallel with the memory cell, and a switching device, connected to the flip-flop, to connect at least one data input line to one of the status lines (QP, QN) of the flip-flop, in dependence on a switching signal.

Abstract: A mixing apparatus for a plurality of turbulently flowing fluid flows varying in temperature and/or composition includes a mixing chamber having a non-circular or predetermined cross section and a straight or curved center line. A plurality of single-conduit and parallel or radial deflector elements are disposed beside the mixing chamber and staggered in the direction of the center line. The deflector elements receive a fluid flow being oriented at an angle relative to the center line and staggered laterally. The deflector elements deflect the fluid flow tangentially into the mixing chamber. The mixing chamber has an outlet opening for the exit of a mixed fluid flow. In a gas-cooled, high-temperature nuclear reactor with a circular outline, the mixing apparatus has a horizontal, annular mixing chamber with a plurality of sectors. Horizontal annular conduits receive at least one fluid flow.

Abstract: A parallel adder has a carry between adjacent adding stages. Each of the adding stages includes a carry-generating circuit which generates a carry output signal from carry input signals to be added by the adding stage and a carry input signal applied to it. The carry-generating circuit includes a complementary stage which is built with complementary transistors connected between the two terminals of a supply-voltage source. The carry-generating circuit has a center node which is connected to the carry output terminal and which, if the data input signals applied to the adding stage have the same binary state value, is at a potential corresponding to the binary state value. The carry-generating cricuit further includes a coupling circuit. One end of the coupling circuit is connected to one terminal of the supply-voltage source, and the other end of the coupling circuit is at the potential of the one terminal if the data input signals have unequal binary state values.

Abstract: Core barrel for a high-temperature nuclear reactor, including internal parts formed of an inner layer of graphite blocks stacked on each other and an outer layer of carbon blocks stacked on each other together forming columns, the blocks of the respective layers being staggered in height, offset relative to each other in azimuth and having indentations alternately formed therein causing each two layers of graphite blocks to be supported on a protruding layer of carbon blocks and each two layers of carbon blocks to be supported on a protruding layer of graphite blocks.

Abstract: Container system for a high-temperature nuclear reactor, including an outer metallic pressure vessel having an inwardly-protruding flange, an inner metallic core barrel resting tightly on the flange, and means disposed below the flange at a lower end of the core barrel for feeding and discharging cooling fluid, the core barrel being gas-tight above the flange.

Abstract: A high-temperature nuclear power plant, includes a reactor, an inner vessel enclosing the reactor, an outer reactor pressure vessel disposed outside the inner vessel, a stub integral with the outer vessel, and a hot gas pipeline disposed in the stub, the improvement comprises a screw connection being releasable from outside the outer vessel for fastening the hot gas pipeline to the inner vessel, and a device connected to the hot gas pipeline for applying a force to the hot gas pipeline in a direction tending to separate the hot gas pipeline from the inner vessel.

Abstract: Device for shutting down a high-temperature nuclear reactor having a reactor core, including a reflector disposed outside the reactor core, channels being disposed in the reflector and having lower ends, storage bins being disposed above the reactor core and being in communication with the channels above the lower ends thereof, a neutron-absorbing material formed of fluidic bodies being storable in the storage bins and feedable into the channels, a plurality of lines connected between the lower ends of the channels and the storage bins, means for selectively establishing an upwardly directed fluid flow of the material in one of the plurality of lines for conveying the neutron-absorbing material at a given adequate speed from one of the channels into one of the storage bins.

Abstract: Gas-cooled high temperature reactor asembly, including a safety container, a chamber disposed in the safety container, a reactor vessel disposed in the chamber for receiving a charge of spherical fuel elements at a given location therein, the reactor vessel being formed of blocks of at least one material from the group consisting of carbon and graphite, a steel shell surrounding the reactor vessel, a metallic base plate supporting the reactor vessel, the base plate having openings formed therein for passing cooling gas blown in the chamber into the given location for a fuel element charge, at least one downwardly extended pipeline having a connection to the base plate for discharging heated gases, the connection being detachable by axial motion of the reactor vessel, a removable cover disposed on top of the chamber, and means disposed on the reactor vessel for connecting the reactor vessel to hoisting apparatus.

Abstract: Pebble-bed nuclear reactor capable of being shut down by a fluidized mass of bodies containing neutron-absorbing material, the fluidized mass of bodies being received in a storage container disposed above the pebble bed during normal operation of the reactor, the storage container being formed with a closable discharge opening, including a piston rigidly connected to the storage container and disposed below the discharge opening thereof, the piston being guided in a cylinder stationary relative to the reactor and being open at the top thereof, the storage container being displaceable in vertical direction between upper and lower end positions thereof, the piston, in the upper end position of the storage container, closing off the cylinder at the upper edge located at the open top of the cylinder and, in the lower end position of the storage container, the fluidized mass of bodies discharged from the discharge opening of the storage container being formed on top of the piston into a discharge cone having a hei