Approved by the State Office for Nuclear Safety, our systems run on research nuclear reactors in the Czech Republic and Austria. We design, manufacture, test and commission ex-core instrumentation sets used to measure neutron flux inside nuclear reactors; reactors´ instrumentation & control systems; accident sequences for rapid and safe shutdown of nuclear reactors; manual and automated control of reactor output power; operator´s consoles.
Our proprietary digital instrumentation designed to measure neutron flux has successfully passed the exacting process of HW qualification. The performance tests proved the system´s capability of working reliably even during earthquakes. We have got to grips the problem of electromagnetic interference experienced in metering very low currents - the test of expedited thermal aging proved no less than 15 years of service life. As a separate process, software was programmed following special methodology - consequently, it is qualified to perform safety function in nuclear facilities.
Our instrumentation sets can measure neutron flux generated by individual impulses, i.e. by flyby neutrons excited during the reactor start-up. This capability reaches up to the thermal power of
2 GW as attributable to special impulses encountered, for example, on the TRIGA reactors. The methods of measurement are varied: impulse, current and the Campbell method. The neutron flux density is compared with set limits, and in case the permissible values are exceeded, the system immediately extends a command to shut the reactor down.
The instrumentation provides the reactor operators with an abundance of information about the reactor´s condition that was not provided by the obsolete analog devices. The operators feel more comfortable and may activate the reactor´s automated controller to manage its output power and store the measured data.
Redundant safety relay system receives signals from channels that measure neutron flux and from the Instrumentation & Control system. If any value is missing or outside the permissible limits, the system will uncompromisingly switch off the magnets of rods whose fall will scram the reactor. Consequently, a reactor failure, if any, will shut the reactor down in a safe manner.
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