This work is focused on the evaluation of the influence of galvanic couples between materials for radioactive waste canisters. The materials considered are carbon steel, stainless steel, copper, and titanium alloy. All materials were tested by means of potentiodynamic curves and zero resistance ammetry. The specific resistivity of compacted bentonite was estimated in a special cell. These results were used for simple one‐dimensional numeric simulation of a galvanic couple. The conductivity of saturated compacted bentonite is excellent and the reach of galvanic corrosion is high. The influence on the corrosion rate of anodic carbon steel is negligible, but it allows for the employment of a large area of cathodic materials, which could be susceptible to hydrogen embrittlement.

This study is focused on an influence of heat transfer on corrosion behaviour of structural materials for radioactive waste canister in synthetic bentonite pore water and bentonite suspension. Experiments were carried out in special cell on cylindrical sample of carbon steel, copper, titanium-palladium alloy and two types of stainless steel. Samples were subjected in synthetic bentonite pore water to sixty-fold higher heat transfer compared to real repository, and approximately thirty-fold higher in bentonite suspension. Corrosion behaviour was observed in two-electrode setup with platinum wire as counter electrode by means of electrochemical impedance spectroscopy. Results showed negligible effect of heat transfer compared to surface temperature.

<p class="AMSmaintext">One concept for Czech canister construction for deep geological repository considers stainless steel as an inner case material. Corrosion resistance to localised (pitting/crevice) corrosion and stress corrosion cracking of austenitic stainless steel 316L and duplex steel 2205 was studied. The environment was synthetic bentonite pore water (SBPOW) of domestic bentonite BaM, or a slurry of bentonite in SBPOW. Tests were carried out between 40 °C and 90 °C under anaerobic conditions of a nitrogen atmosphere. The following methods were used for evaluation: potentiostatic tests at oxidation-reduction potential of the environment, long-term exposure tests in SBPOW and slurry, slow strain rate tensile test (SSRT), exposure test of U-bends, and optical microscopy. Results showed no susceptibility of either material to stress corrosion cracking. No localised corrosion was observed up to 70 °C. There was no localised attack observed in SBPOW at 90 °C, but there was localised corrosion detected in the bentonite slurry. Forced breakdown of the passive layer during SSRT, and artificial crevices (O-rings), showed no effect on localised corrosion propagation. The detrimental effect was probably a result of the adsorption ability of the bentonite particles, which allowed breakdown of passive layer and disabled repassivation of metastable pits.</p>

В статье рассматриваются существующие в нормативных правовых актах Российской Федерации и в отечественной науке вопросы, ориентированные на функционирование партнерства го- сударственного и частного секторов с целью обеспечения национальных интересов как в целом страны, так и отдельно пенитенциарной системы. Цель научного исследования – рассмотреть правовые основания применения государственно-частного партнерства в пенитенциарной системе России, а также показать, что взаимоотношения пенитенциарной системы с негосударственным сектором могут внести значитель- ный вклад в финансирование и эффективное функционирование производственной сферы уголовно-ис- полнительной системы Российской Федерации. Применялись такие методы исследования, как истори- ко-правовой, сравнительно-правовой, формально-юридический, и другие. В работе выявлены возможные проблемы правового регулирования отношений государственно-частного партнерства, обоснована не- обходимость пересмотра толкования отдельных элементов определения рассматриваемого партнерства. На основе проведенного исследования авторами даны рекомендации по совершенствованию понятия го- сударственно-частного партнерства в уголовно-исполнительной системе Российской Федерации и норма- тивно-правовому регулированию рассматриваемой области. In the article the authors consider the issues existing in the regulatory legal acts of the Russian Federation and in domestic science, focused on the functioning of the partnership between the public and private sectors in order to ensure national interests, both in the country as a whole and separately in the penitentiary system. The purpose of the scientific study is to consider the legal grounds for the use of public-private partnerships in the Russian penitentiary system, and also to show that the relationship between the penitentiary system and the non-state sector can make a significant contribution to the financing and effective functioning of the production sphere of the penal system of the Russian Federation. Such research methods as historical-legal, comparative-legal, formal-legal, and others were used. The paper identifies possible problems of legal regulation of public-private partnership relations, substantiates the need to revise the interpretation of certain elements of the definition of the partnership in question. On the basis of the study, the authors give recommendations for improving the concept of public-private partnership in the penal system of the Russian Federation and the legal regulation of the area under consideration.

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