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Nuclear Safety

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No 2 (2020)
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THE PROBLEMS OF NUCLEAR, RADIATION AND ECOLOGICAL SAFETY

7-15 141
Abstract
IAEA standards for collision testing include conducting an experiment with a mock-up of a TUK package in conditions simulating an aviation accident. The sample should be subjected to a collision with a rigid barrier at a speed of not less than 90 m/s, and in such a position as to cause maximum damage. The target must also comply with the requirements of the norms-to be a flat horizontal surface of such a kind that any increase in the resistance to displacement or deformation of this surface when the sample falls on it does not lead to a significant increase in the damage of this sample. The surface of the target can be in any position, but it must be perpendicular to the trajectory of the sample. Rocket tracks are used to carry out such tests with packages weighing up to half a ton. AS such experiments are isolated and expensive, a strict justification of compliance with the requirements for the impact angle of the parameters that are actually implemented during the tests is required. The paper presents methods of measuring these parameters in the experiment and determines their accuracy.
16-41 179
Abstract
The article provides a brief analytical review of radiation effects associated with the impact of ionizing radiation on biological objects. The processes of the action of ionizing radiation on molecules of deoxyribonucleic acid (DNA), which occur in the body at the cellular level during its absorption, are considered. It is shown that in a wide range of dose rates generated by ionizing radiation when the latter acts on biological objects and, in particular, on humans, the most dangerous are the genetic consequences, which play an essential role for the population of countries that actively use ionizing radiation in industry. Other uses include medicine, particular types of production, as well as in the production of electricity at nuclear power plants. Particular attention is paid to the effects of ionizing radiation on children, requiring increased attention in the diagnosis of diseases in post-nuclear accidents, as well as during the diagnosis or treatment of radiation. As methods of radiation monitoring of ionizing radiation, the article provides a brief presentation of an automated system of radiation monitoring of the environment with its goals, objectives, and methods to minimize the consequences of radiation accidents at existing nuclear power plants.

RESEARCH, DESIGN, CONSTRUCTION AND INSTALLATION OF NUCLEAR FACILITIES MANUFACTURING EQUIPMENT

42-54 128
Abstract
The article presents the results of the study of changes in the stress-strain state and the geometric parameters of the containment shell near the junction of the cylindrical part with the dome and in the area of the crane rail of the polar crane during the acceptance tests.
55-72 123
Abstract
Scanning contact potentiometry (SCP) is used for defects detection and for determine the coordinates of the defects localized in welded joints. Studied samples are welded by manual arc welding of two halves austenitic steel 321H (Chromium-Nickel-titanium stainless Steel) dimension of each 200×110×13.5 mm. Thereafter welding, seam width is about 12 mm. Subsequently welded sample is inspected using X-ray radiographic testing system. In order to compare techniques capabilities, plotted potentiograms and weld radiograph are compared. Experimental outcomes prove that defects can be detected by SCP technique. SCP results are complied with mathematical signal analysis of defects. This method may substitute some destructive or nondestructive methods.
73-82 181
Abstract
There is a need to improve methods for calculating elements of engineering structures and equipment for strength and stiffness, which directly affects the safety of nuclear power facilities. For the first time the theory of pure bending of rectangular plates pivotally supported at corner points is generalized to the case of their bending both when the plates are hinged around the perimeter and when a rectangular plate is pinched on two adjacent sides. It should be noted that the obtained system of equilibrium equations does not allow satisfying the equilibrium equations exactly, but only in the sense of the average integral value. However, the authors think this method of solving the deflection problem is much more mathematically and physically justified in comparison with the use of Kirchhoff hypotheses, which lead to contradictions when zero shear forces are assumed to be nonzero, only in order to obtain a deliberately equilibrium equation. The proposed approach allows us to evaluate the deflection of the plate in the case when the main vector of forces applied to the plate can be applied to its geometric center. The article indicates the conditions for the distribution of the transverse load under which it can be assumed that the main vector of forces can be applied to the geometric center of the plate. As examples, the problems of deflection of a rectangular plate under its own weight have been solved both when hinged around the perimeter and when pinched on two adjacent sides.

OPERATION OF FACILITIES NUCLEAR INDUSTRY

83-91 152
Abstract
Boron carbide, Dysprosium, Silver, etc have a lot of unique properties, high neutron absorption, chemical stability, high melting temperature, low density, and low price. These elements are widely using in the VVER power reactors. In this article was investigated the absorber cross-section, burring behavior and scram efficiency of these elements. If the control rod (CR) is made of only boron carbide chemical element and it will be used in the maneuvering mode then the power of a reactor will fall down drastically. But in this work main goal is that, which element will be required in the control rod, as a result, the reactor in the maneuvering mode work with different power without fall down power drastically. The result was calculated by the three programs GETERA, WIMS and SERPENT.
92-99 170
Abstract
The relevance of ice melting on air lines is due to a significant increase in their length in the electric power system of the Southern region under the conditions of operation of Rostov NPP 4 units. The paper makes the analysis of various methods of combating icing on overhead power lines with a voltage of 110-220 kV, on the basis of which recommendations for their use in these climatic conditions are given.
100-108 136
Abstract
According to Monte Carlo calculations of spatial distributions of photon energy in Lead from point isotropic and plane mon-directional monoenergetic sources with energies of 10-50 MeV, define the attenuation coefficient of air Kerma and the dose buildup factors are determined for the studied material. The calculations take into account the contribution of fluorescence, annihilation radiation, and bremsstrahlung radiation. The independence of the Buildup Factors and attenuation coefficient from the angular distribution of the source radiation and the weak dependence of the attenuation coefficient on its energy in the range of 30-50 MeV are shown. Corrections for barrier protection were determined and their independence from the thickness of the shielding material and the photon energy of the source was noted. The obtained information makes it possible to reduce errors in the results of calculations of the thickness for anti-radiation protection of electronic accelerators at high energies, using the developed engineering methods of calculation. The obtained information can also be used in calculations of protection against bremsstrahlung radiation of electronic accelerators by engineering methods.

SAFETY CULTURE, SOCIO AND LEGAL ASPECTS OF TERRITORIAL DEVELOPMENT OF NUCLEAR FACILITIES LOCATION

109-118 176
Abstract
The article discusses some problems of providing the socio-economic security of the territories where nuclear facilities are located using the example of Volgodonsk, their dynamics are presented. The authors present the starting results of the project work of the initiative community of the city focused on the improvement of the territory. The importance of adhering to the principles of marketing, collaborative design, and tactical urbanism in the development of territorial development strategies is noted. Target and motivational guidelines for all groups of stakeholders are defined. The tasks and main directions of complicity in the project are set. The role of the key partner and project expert, the Agency for Strategic Initiatives, is outlined.
119-130 208
Abstract
The sphere of ensuring national security is an important object of state policy. When managing this sphere, strategic and tactical levels are distinguished, each of which has its own institutional consolidation. In addition, functional areas of national security, such as nuclear and radiation safety, can be distinguished. The article analyzes the texts of the National Security Strategy of the Russian Federation and the Fundamentals of State Policy in the Field of Nuclear and Radiation Safety of the Russian Federation from the perspective of analyzing the potential of the strategic regulatory impact of these documents. The inconsistency of their texts, the lack of complexity in regulating the institutional framework for the implementation of state policy in the field of national security is noted. It is also shown that there is no correlation between these important documents of strategic management. The study allowed the authors to conclude that strategic documents in the field of ensuring the national security of the Russian Federation require its processing and adjustment.
131-141 188
Abstract
Energy consumption in modern society is growing every day, but the prospects for development and competitiveness of the nuclear industry today and in the long term are largely related to the attitude of the public to it. Taking into account the specifics of nuclear power, it becomes obvious that the successful development of the nuclear industry will not be fully realized without overcoming the negative attitude of the public towards it. It is becoming more and more important for the nuclear industry to establish an active dialogue with the broad masses in order to form an adequate attitude to the industry.


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ISSN 2305-414X (Print)
ISSN 2499-9733 (Online)