The risk of radioactive contamination of the environment is assessed using a comprehensive approach and examination of the questions, including analysis of the structure of the objects and the interaction between them, determination of the sources of the real and potential danger, development of scenarios for accidents and assessment of their probability, the radiation consequences of exposure of workers, the general public, and the environment during salvaging of the nuclear-powered fleet in the Russian northwest. A systematization of the risk is made and the distribution according to the degree of danger is determined.The radiation conditions in the northwest part of our country are characterized by a large quantity of spent nuclear fuel and radioactive wastes produced as a result of the operation and salvaging of objects of the nuclear-powered naval and ice-breaking fleets. The conditions of their storage at former shore servicing bases in Guba Andreev and in Gremikha often do not meet modern requirements for long-term radioecological safety. As a result, the potential sources must also be taken into account together with real sources of danger. The following are examples of the potential sources:• nuclear and radiation accidents with emission of a substantial amount of radionuclides into the environment;• locations of accumulation of spent nuclear fuel and radioactive wastes;• the state of objects which complicate their subsequent salvaging (sunken objects, nontransportable objects, and so on). The assessment of the risk associated with real and potential sources of radioactive contamination of the environment requires the development of accident scenarios, determining their probabilities, the scale of the radiation consequences, primarily the irradiation dose to workers, the general public, and the environment, and the distribution over degrees of danger.Real Sources of Radiation Danger. The following sources of this type are present on the former shore servicing base in Guba Andreev:• blocks for dry storage of spent fuel, characterized by unfavorable and, on individual sections where the equivalent γ-ray dose rate, specifically, outside the confines of the storage sites, reaches 3 mSv/h, dangerous radiation conditions;

The aim of the research is the assessment of environmental hazards and occupational safety to implement the most effective ways to protect workers, the environment from the effects of hazardous and harmful factors when using chemicals in agriculture.Research methods: monographic, abstract‐logical, mathematical and logical‐linguistic modeling, computational‐ constructive, probability theory, expert estimates, etc.Results: a model of integrated assessment of environmental hazards and labor protection in agriculture, including nine assessment blocks: 1) soil contamination by pesticides, agrochemicals and heavy metals; 2) the balance of nitrogen, phosphorus and potassium, ensuring environmental protection; 3) the load of livestock on pastures; 4) the ratio of stabilizing and destabilizing factors; 5) the risk of waste and by‐products; 6) the production of environmentally safe products; 7) working conditions in the workplace; 8) the level of investment in labor protection, environment and environmentally safe products; 9) the level of environmental culture and culture of labor protection of workers and the population.Conclusion: the Model is tested in the working conditions of LLC  ʺMalinischiʺ of the Pronsky district of the Ryazan region in manual mode and can be the basis for the implementation of information and computer technology assessment.

Systematized information on toxic wastes produced during salvaging and rehabilitation of decommissioned nuclear and radiation-hazardous objects in the nuclear-powered naval fleet in north-west Russia is presented. The dynamics of their accumulation up to 2025 is estimated. Substantiation is given for the need to re-examine the existing system of handling wastes and searching for new solutions for decreasing the ecological risk by systematically reprocessing or eliminating them together with gaining an ecological advantage. Such an approach requires upgrading and developing infrastructure at the salvaging enterprises and objects undergoing rehabilitation. Several strategies are examined. The advantages and disadvantages of each strategy are evaluated according to safety and cost factors and the most acceptable strategy is chosen. A functional model is created. A list of projects and technical means is presented, and the time periods and costs required for implementation are estimated. The priority directions of work are identified.Large quantities of radioactive and toxic wastes are produced during salvaging and rehabilitation of nuclear and radiation-hazardous objects of the fleet. At salvaging enterprises, the daily hazard of toxic wastes with respect to chemical risk was hundreds and thousands of times greater than the radiation risk [1−3]. The reason is that thermal and mechanical methods were used to disassemble submarines and surface ships. Oxides, the ingredients of the materials being worked, and dust enter the air [4]. Fragments of structures and covers which are stored on the territory of the plants are formed. Process liquid media are extracted from ships at the preparatory stage. Finally, gaseous, liquid, and solid wastes are formed.Gases, aerosols, and dust enter the atmosphere without any purification. The liquid wastes are partially neutralized, purified, and burned; all other wastes are collected into storage spaces. The solid wastes are put into containers which are placed on open sites or moved to city grounds (dumps). Heavy particles of metals and their oxides and other chemical substances making up aerosols and dust settle on the territory of the plants. Rain and melt waters carry them into the adjoining marine water area. Washing and household water containing petroleum product impurities are first purified and then discharged in the water area. The territory becomes contaminated as a result of long-term storage of disassembled structures and materials, including coatings and insulation, in the open (Fig. 1).Almost all liquid wastes are hazardous. They must be reprocessed or destroyed. Individual types of greases, hydraulic liquid, freons, and chromium-containing water solutions are neither reprocessed nor destroyed. The danger of solid

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