NUCLEAR POWER PLANT HAVING A SIGNAL TRANSMISSION SYSTEM AND METHOD FOR TRANSMITTING A MEASURED VALUE

摘要

A nuclear power plant includes a containment, a region exposed to radiation in the containment and a signal transmission system. A modulator disposed inside the region exposed to radiation converts an analog measured value provided by an associated sensor into a PWM signal. A demodulator disposed outside the region exposed to radiation reconstructs the measured value from the PWM signal. The modulator is implemented by using radiation-hardened, preferably analog, circuit technology and includes adaptable measured value normalization, a sawtooth generator and a comparator. A signal transmission line being DC-isolated from an output of the comparator connects the demodulator to the modulator. A method for transmitting a measured value from a region exposed to radiation in a containment of a nuclear power plant to an external evaluation system is also provided.

主权项

1. In a nuclear power plant including a containment, a region exposed to radiation in the containment and a signal transmission system, the improvement comprising:
a sensor disposed inside the region exposed to radiation for providing an analog measured value; a modulator disposed inside the region exposed to radiation for converting the analog measured value into a PWM signal; and a demodulator disposed outside the region exposed to radiation for reconstructing the measured value from the PWM signal; said modulator being implemented by using radiation-hardened circuit technology and including adaptable measured value normalization, a sawtooth generator and a comparator having an output; and a signal transmission line being DC-isolated from said output of said comparator, said signal transmission line connecting said demodulator to said modulator.