Abstract: An electronic circuit for demodulating a carrier signal, for modulating a wanted signal and for supplying a consumer with power. The carrier signal is an alternating signal having a positive half-wave and a negative half-wave, comprising: a galvanically isolating, especially an inductive, interface with a first contact and a second contact, wherein the carrier signal is applied to the interface; a bridge rectifier having a first diode, second diode, third diode and fourth diode connected to the interface. The first diode and the second diode are conducting in the case of a positive half-wave, wherein the first contact of the interface is connected with the anode of the first diode, wherein the third diode and the fourth diode are conducting in the case of a negative half-wave, and wherein the second contact of the interface is connected with the anode of the third diode; a supply circuit, which is connected to the cathode of the first diode.

Abstract: A nuclear reactor fuel alloy consists essentially of from slightly greater than 7 to about 4 w/o zirconium, balance plutonium, and is characterized in that the alloy is castable and is rollable to thin foils. A preferred embodiment of about 7 w/o zirconium, balance plutonium, has a melting point substantially above the melting point of plutonium, is rollable to foils as thin as 0.0005 inch thick, and is compatible with cladding material when repeatedly cycled to temperatures above 650.degree. C. Neutron reflux densities across a reactor core can be determined with a high-temperature activation-measurement foil which consists of a fuel alloy foil core sandwiched and sealed between two cladding material jackets, the fuel alloy foil core being a 7 w/o zirconium, plutonium foil which is from 0.005 to 0.0005 inch thick.