TESTING OF A NEW NEUTRON FLUX MONITORING SYSTEM WAS SUCCESSFULLY PASSED AT ZNPP PRODUCED BY SEVERODONETSK RPA “IMPULSE”

Source of information: site of NNEGC “Energoatom”

Testing of a new neutron flux monitoring system was successfully passed at ZNPP produced by Severodonetsk RPA “Impulse”.

At Zaporozhye NPP power unit 2 successfully took place tests of new digital facilities of neutron flux monitoring and measurements (NFMS-I). From these test results depended if we were permitted further power unit operation of Ukrainian NPPs by State Nuclear Regulator Committee of Ukraine.

Before scheduled repair of power unit 2 in accordance with permitted application and carrying out a number of working operations on May 31, at 12:01 there was a signal of imitation of switching-off turbo-feed pump (TFP-1) and in accordance with algorithm the accelerated preliminary protection activated with automatic unloading unit up to 450 MW. Work of systems and mechanisms occurred in planned mode. There were no abnormalities and disturbances. A new algorithm of reactor neutron flux monitoring system was approved with the participation of chief state inspector of nuclear and radiation safety of Ukraine Mikhail Gashev, the first vice president of technical director of NNEGC “Energoatom” Ivan Foltov, general director SS ZNPP.

Vyacheslav Tishchenko, chief engineer of SS ZNPP Alexander Shavlakov and other experts. NFMS-I was produced by Severodonetsk RPA “Impulse”. Its system is intended to replace previously installed on neutron flux monitoring system units NFMS.

The success of carrying out this work confirmed the right acceptance of design solutions and dynamic stability of the domestic NPPs.

The next step made by nuclear powers, designers and developers is implementation of a new system to improve the safety of nuclear power plant and prolongation of their resources.