摘要:
Illustrative embodiments provide a reactivity control assembly for a nuclear fission reactor, a reactivity control system for a nuclear fission reactor having a fast neutron spectrum, a nuclear fission traveling wave reactor having a fast neutron spectrum, a method of controlling reactivity in a nuclear fission reactor having a fast neutron spectrum, methods of operating a nuclear fission traveling wave reactor having a fast neutron spectrum, a system for controlling reactivity in a nuclear fission reactor having a fast neutron spectrum, a method of determining an application of a controllably movable rod, a system for determining an application of a controllably movable rod, and a computer program product for determining an application of a controllably movable rod.
摘要:
An isolation transformer for a cathode heater supply for a microwave source has a first U- shaped secondary winding (421), comprising two parallel leg portions joined at one end thereof by a bridging portion. A primary winding (422) is located around and concentric with a portion the bridging portion. A monitor winding passes through primary core assemblies of the primary winding. Electrical insulation (115) insulates the secondary winding from the primary winding. For a DC cathode heater supply a second U-shaped secondary winding is spaced from and aligned with the first U-shaped secondary winding and first and second smoothing chokes comprising respective core assemblies (1127, 1129) are fitted over connection leads arranged for connecting two ends of the first secondary winding to the cathode heater. Synchronised rectifiers are connected between the secondary windings and the first smoothing choke; and control means are provided for the synchronised rectifiers.
摘要:
A transformer (200) comprises a secondary winding including a plurality of coaxially arranged toroidal closed magnetic circuits (42) connected in series within an enclosure (47) and a primary winding (23) comprising a plurality of turns including electrically conducting members (301-306) passing axially through the toroidalclosed magnetic circuits, respective ones of the plurality of electrically conducting members being electrically connected byrespective electrically conducting strip lines (321-326) passing along walls of the enclosure to form the continuous primary winding (23).
摘要:
Power Supply for Radio Frequency Heating Apparatus An RF generator power supply comprises a first switched mode power supply (SMPS) connected in series to a second SMPS bya DC bus. A capacitor is arranged between the outputs of the first SMPS and inputs of the second SMPS to act as a smoothing capacitor for the first SMPS and to supply pulse energy to the second SMPS. The second SMPS has an output connected toan input of a step-up transformer and an output of the step-up transformer is connected to an input of a rectifier connectable to the RF generator. An input ofthe first SMPS is connectable to aprime power supply tomaintain a high power factor withlow harmonic content while setting anoperating voltage and peak current levelfor the RF generator. The second SMPSis arranged to feed thestep-up transformer and is arranged to operatewith a variable duty cycle and/or variable frequency to provideaverage power controlofthe RF generator. The second SMPS is rapidly switched off on detection of a power surge throughthe RF generator.
摘要:
The present invention relates to an isolated nucleic acid molecules encoding mutant lama2 gene of zebrafish, mutant zebrafish having mutations in the lama2 gene, fish models containing mutant zebrafish, and uses of the fish models.
摘要:
A switching arrangement for a high voltage load provides high voltage pulses to the load. The switching arrangement includes switching modules (S1-Sn) where n is typically (75). A load capacitance is Cd is required to avoid voltage overshoot at the load and is provided by a capacitance of nCd arranged in parallel with each switch.
摘要:
Treatment and abatement systems for treating seawater, marine vessel exhaust gas, flue gas, contaminated gas streams, or a combination thereof are described.
摘要:
One aspect of the invention relates to a method comprising a single-stage conversion of NO and/or NO 2 in a first stream to one or more mineral acids and/or salts thereof by reacting with nonionic gas phase chlorine dioxide ((ClO 2 ) 0 ). Another aspect of the invention relates to a method comprising first adjusting the NO and NO 2 concentrations in a first stream to a molar ratio of about 1:1, and then reacting with an aqueous metal hydroxide solution (MOH). Another aspect of the invention relates to an apparatus that can be used to carry out the methods disclosed herein. The methods disclosed herein are unexpectedly efficient and cost effective, and can be applied to a stream comprising high concentration and large volume of NO and/or NO 2 .
摘要:
A transformer comprises a primary winding 231; a secondary winding 233; a first electrostatic screen 234 located between the primary winding and the secondary winding and most proximate to the primary winding means; and a second electrostatic screen 235 located between the primary winding and the secondary winding means and most proximate to the secondary winding means. The first electrostatic screen is electrically connectable to a power supply electrically connectable to the primary winding and the second electrostatic screen is electrically connectable to a load electrically connectable to the secondary winding. The invention also includes an inverter system including the transformer.
摘要:
An interconnection for connecting a switched mode inverter to a load, the interconnection comprising: a plurality of insulated conductors (311-313, 321-323); sleeving means (351) sleeving the insulated conductors together; and at least one lossy toroidal inductor core (352) concentric with and partially surrounding the sleeving means to hold the plurality of insulated conductors together; wherein the at least one lossy toroidal inductor core (352) is arranged to act as a common mode inductor to minimise current flowing through the interconnection to a stray capacitance of the load. Preferably, high frequency eddy current effects are minimised in the interconnection by a suitable choice of diameters of conductive cores of the plurality of insulated conductors and the spacing between the centres of the conductive cores.