Signal Processing Units (In-Core)

The DAK 250 digital start-up channel consists of either the DAK 250i for pulse range (BF3, B10-counters or fission chambers) or the DAK 250g for the intermediate range (ionization chambers) which has linear or logarithmic output signals and a reactor period signal with an optional module for reactivity calculation. The DAK 250 channel is also used for steam generator leak monitoring (N16).

Working with self-powered neutron detectors to monitor local neutron flux distribution and features background compensation, calibration, and noise reduction.

Local and average power range channel for BWR reactors with average flux and flow-related flux, including stability monitoring.

The DWK 250 digital wide-range channel in combination with the TKV 23 wide-range preamplifier (50 ohm or 75 ohm) provide a combination of pulse and Campbell (RMS) processing signals together with in-core (BWR) or ex-core (PWR) fission chambers that have pulse, intermediate and wide-range neutron flux and reactor period signals.

The NPA-2003 compensator removes the delayed response portion of the self powered detector signal to be used for safety shutdown trip indications.