Study of possibilities of use containment pressure relief filtration system for mitigating the consequences of a beyond - Design accident at NNP with VVER type reactor

Filtered vented containment system is considered to be the means to prevent WWER-type reactor containment failure caused by pressure rise above the critical value and restriction of the radioactive releases through the containment leaks to the environment to the level not exceeding the admissible one. The two-stage filter system consists of the aerosol decontaminator based on the use of fluid ejector and the sorbent filter based on the titanium oxides. The filter removes molecular and organic forms of iodine from steam-gas flow. The system is effective for the slow pressurization accident scenarios without containment isolation failure or bypass sequences. To test the required efficiency of the filtration system a special program of experimental analysis is called for