The enhanced safety of MKER-1000 is achieved through:
utilization of self-protection features inherent in this type of reactor;
reactor core composition ensuring the stabilizing feedback by reactivity through negative values of the void coefficient and reactivity coefficients by the coolant temperature, at all possible reactor states;
negative values of the void and power reactivity coefficients. The circulation circuit (CC) voiding effect is negative, too;
natural coolant circulation in the circuit;
use of passive systems in the main;
means of accident consequences localization.
The power unit with MKER-1000 is being designed as an automatically controlled process complex (APC) intended for a safe and economically efficient electricity production.
The control over the APC is exercised by the NPP automated control system (ACS) consisting of the automated process control system (APCS) and automated production control system.
It is provided in the design that the APCS will incorporate a system to monitor the integrity of barriers preventing dissimination of radioactive products, as well as some automated radiological situation monitoring systems (ASKRO) both on site and beyond.
The integrated monitoring, control and protection system (IMCPS) anticipates the availability of two independent systems for reactor shutdown and maintaining in subcritical state, i.e.: a rod one (RPS) using cluster-type absorber elements; and a liquid one (LPS) using liquid poison columns as actuators, whereby the liquid is to be indroduced into the designated IMCPS channels in the reactor core.
The NPP design incorporates cooling towers and an open-cycle cooling system which utilizes water from the surface sources (cooling ponds, sea gulfs, etc.).
The reactor design solution makes possible to refuel the 2,0%-2,4%-enriched uranium dioxide fuel assemblies at any energy level. This possibility ensures a high capacity factor value.
All refuelling activities are carried out with the help of a remotely-controlled refuelling machine which can be automatically positioned on a preset coordinate of the reactor, sluice chamber nozzles and operations pool.
The reactor unit and other main NPP equipment is being designed to stand the max design earthquake (MDE) of Level 8 according to the Richter scale.
It is envisaged that the spent nuclear fuel will be kept in the cooling ponds of the reactor hall for 5 years, whereupon it will be transported for further long-term (min 50 years) “dry” storage.
The MKER-1000 reactor unit allows to produce isotopes (С-14, S-35, Ca-45, Со-60, Zn-65, Se-75, Mo-99, J-125, lr-192) and perform Si doping (up to 80 t/year per unit).