[en] On the basis of an analysis of the cometary brightness flares catalogue the evidence of their relation to the corpuscular solar radiation are given. It is shown that the flare cometary activity depends on the phase of the 11-year cycle of solar activity, i.e. the maxima correspond to the periods of rise and decline. Active events in comets correlate not only with the appearance of high-velocity solar plasma streams but also with numerous geophysical events ap--pearing as the result of the solar plasma influence on the Earth magnetosphere and atmosphere. The most part of cometary flares is observed on a solar activity decline and the largest amplitudes of flares are observed on solar activity decline and rise

[en] On the basis of an analysis of a catalog of flares of cometary brightness, evidence is given for their connection with solar corpuscular radiation. It is shown that cometary flare activity depends on the phase of the 11-year solar activity cycle: the maxima correspond to periods of rise and fall. Active phenomena in comets correlate not only with the appearance of high-velocity streams of solar plasma but also with many geophysical phenomena generated as a result of the action of the solar plasma on the earth's magnetosphere and atmosphere

[en] A system of integrodifferential equations was established to allow a quantitative estimation to be made of time dependence of icy grain halo brightness after destruction by energy particles of solar wind. The solution led to the assumption that icy grain halo brightness variation is of outburst nature. It was shown that with due account being taken of the contribution of the gas-dust atmosphere the estimated photometric light variation curves are in good agreement with the observed brightness outburst curves. This model takes into consideration the dependence of cometary outburst amplitude and duration on their heliocentric distance and the level of solar corpuscular activity. Also discussed is how visible cometary brightness would be affected by the existence of icy grain halo in cometary atmosphere and the variation of its area owing to fragmentation and sustimation. (Z.S.) 1 fig., 9 refs

[en] In this monograph, the provisional analysis of the causes and sequences of the sever accidents on the Fukushima NPP is presented. The analysis of the possibility of the origin of extreme events connected with the flooding of Zaporizhzhia NPP industrial site, emergency of the steam-gas explosions on NPPs with WWER and other phenomena occurred under sever accidents was carried out. It was presented the authors original working-out on symptom-oriented approaches of sever accident initiating event list identification, on criteria substantiation of explosion safety and optimization of processes management at sever accidents, as well as on the methodological support of the accident beyond the design basis management at the WWER for prevention of their transition in the stage of sever accidents.

[en] The symptom-informed methods to form lists of initial events of severe accidents are offered in the paper.Based on these approaches sufficient lists of initial events of severe accidents are formulated and proved

[en] The symptom-informed methods to form lists of initial events of severe accidents are offered in the paper. Based on these approaches sufficient lists of initial events of severe accidents are formulated and proved

[en] Ingenious risk-informed methods to assess ecological safety of facilities with radioactive waste are proposed in the paper. Probabilistic norms on lethal outcomes and reliability of safety barriers are used as safety criteria. Based on the probability measures, it is established that ecological safety conditions are met for the standard criterion of lethal outcomes

No abstract available

[en] Based on a preliminary analysis of the main reasons for NPP Fukushima-1 justified limitations of traditional approaches to development management leaderships instructions severe accident. We propose a promising method for identifying lists initial events of severe accidents that takes into account the background of colliding-design accident sequences and state systems at the beginning of a severe accident

[en] The paper discusses an alternative approach is the definition of probabilistic safety indicators NPP, based on estimates of the probability of failure of protective safety barriers under the influence of fatigue mechanisms of degradation of