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Operating reliability and safety of the functioning of energy facilities and systems

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Azarov S.I., Sydorenko V.L., Zadunaj O.S. Assessment of safety of the “Shelter” object in the process of its transformation into an environmentally friendly system Azarov S.I., Sydorenko V.L., Zadunaj O.S. Assessment of safety of the “Shelter” object in the process of its transformation into an environmentally friendly system

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Board № (full): 3 (58) 2019 year
Filesize: 318.32 kB
Downloads: 349
The complexity of safe operation of the “Shelter” object (SO) and the availability of data of different qualimetric nature, describing its behavior, necessitate the development of new methods for assessing the safety of object in question, which would enable us to  perform the integration of these data within a single approach. The methodological foundations proposed in this article are based on a systematic approach and fuzzy inference, which allows the use of qualitative and quantitative data on the object of analysis. It is proposed to make decisions with taking into account the significance of all aspects relative to each other and to quantify the decision options using an approach based on the method of hierarchy analysis, which enables us to determine the safe state of the SO. We present the categories of SO operating conditions, initial events of accidents at the object with the frequency of their occurrence, priority tasks to ensure the security of the specified object, as well as  basic requirements of safety criteria and the principles of their classification. The general safety criteria in the process of converting the SO into an environmentally friendly system are considered in detail, including criteria for nuclear safety, radiation safety, environmental safety, and fire and explosion hazard. It is noted that the quantitative analysis of SO safety with using the above safety criteria is possible only on the basis of objective measurement and prediction of the consequences of hazard. The main elements of level of the potential danger included in the analysis system and principles of the formation of SO safety parameters are indicated. The steps of process of assessing initial events during the analysis of probability of accidents at the SO and the stages of calculation al-and-analytical studies of the occurrence and development of accidents at this facility are listed. The stages of process of the decision-making support for the prevention of accidents and minimization of environmental consequences, as well as the decision-making matrix in emergency situations based on expert assessments are given.
Keywords: safety standards and rules, safety principles and criteria, spent nuclear fuel, radioactive waste.

Bicova E. V. The methodical approach to account of threshold meanings of indicators for the analysis of energy safety on an example Moldavian Power System Bicova E. V. The methodical approach to account of threshold meanings of indicators for the analysis of energy safety on an example Moldavian Power System

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Board № (full): 1 (8) 2003 year
Filesize: 430.78 kB
Downloads: 5920

The new method of account of threshold meanings of indicators of energy security- method of functional interrelations is described which allows to take into account mutual communication of indicators of energy safety ss among themselves, and with indicators of economic safety. It enables on the accepted one main threshold meaning of the indicator of economic safety with use of the block diagrams of interrelation to expect threshold meanings of indicators of energy safety. The indicators of energy safety is chosen and systematized in blocks. Tine results of accounts of indicators of energy safety - threshold and actual are given, and on them the estimation of a condition of a level of energy safety of power system of Moldova is made.

Keywords: indicators of power safety, method of functional interrelations, threshold meaning of the indicator, block diagrams of interrelation.

Vikhorev J. A. Influence of Varying Regimes on Reliability of Thermal Power Equipment Vikhorev J. A. Influence of Varying Regimes on Reliability of Thermal Power Equipment

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Board № (full): 1 (2) 2000 year
Filesize: 371.85 kB
Downloads: 5810

The analysis of influence of the varying (start-stop) regimes on reliability of the thermal power equipment is performed. The quantitative estimations are obtained.

Keywords: power system, varying regimes equipment reliability indices.

Klevtsov S.V. Concept on the management of safety margins of nuclear power plants Klevtsov S.V. Concept on the management of safety margins of nuclear power plants

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Board № (full): 2 (53) 2018 year
Filesize: 615.07 kB
Downloads: 2895

At present, there exists only a single approach to decision making on the safety of NPP, based on a probabilistic estimate. Nevertheless, the safety of NPP is substantiated, as earlier, from deterministic positions. To remove this contradiction, we have developed a concept of safety management, based on deterministic analysis. It involves the measurement of safety margins and their comparison with the deterministic safety criteria for substantiated decision making. This methodology is recommended for the nuclear regulation and NPP designing and operation.

Keywords: safety deficit, limiting value of safety deficit, dimensionless safety margin, safety profile, management of safety margins.

Linetsky I. K., Hcerbina E. V., Leschenko I. Ch., Vertepov A. G. On-line diagnostics of equipment in main gas pipelines systems Linetsky I. K., Hcerbina E. V., Leschenko I. Ch., Vertepov A. G. On-line diagnostics of equipment in main gas pipelines systems

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Board № (full): 1 (4) 2001 year
Filesize: 342.95 kB
Downloads: 5672

The calculation algorithm of technical state factors of gas mams centrifugal force-pumps is outlined. The on-line diagnostics outcome of centrifugal force-pumps of compressor in Pravohettmskaya station is given.

Keywords: gas pipeline, compressor station, centrifugal force-pump, real technical state of equipment.

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