This article describes the inertial measuring device IMU, as well as its use in airborne laser scanning and digital aerial photography. This device is used during the operation of a scanning unit and an aerial photo camera. The structure of an additional connection for a digital video camera is proposed, which will record video together with the GPS and IMU data stream. Also, conclusions are given about the quality of output data that affect a final product in engineering surveys.

Abstract. In the presented article the nuclear safety issues with VVER-1000 reactor are considered. The study element is the protective containment (PC), the most important function of which is localization and retention of radioactive substances within the accident localization zone. The example of possible unregulated destructive forcing (UDF) on the PC for the construction and installation work period is given.One of the basic concepts of nuclear power plants with WWER safety is the concept of defense-in-depth, which includes the installation of successive physical barriers: fuel matrix and fuel element cladding; coolant contour; protective containment (PC). In order to implement the concept it is necessary to create several layers of protection "in depth" [1]. The following levels are of particular interest: maintaining ready components and systems of nuclear power plants equipment, which are important for the safety of the facility (equipment redundancy, technical condition diagnostics, malfunctions and failures elimination, qualitative carrying out of preventive maintenance); preventing the transition process parameters exceed the safe operation.The most important function of PC under unfavorable circumstances is considered to be the location and retention of radioactive substances within the accident localization zone. The effectiveness of the containment protection functions implementation is strongly influenced by its successful resistance to unregulated destructive forcing (UDF).The procedure for the assessment of the technical state of PC for the preparation of input data for the PSA includes: the technical documentation analysis, visual inspection, tool inspection, results analysis, testing calculations performance. As an example, consider a survey of containment during the construction of the power generating unit of a nuclear power plant. Implementation of instrumental examination from the mark 13.2 m to 55.6 m was carried out by non-destructive testing methods. To control the concrete strength characteristics the shock pulse method based device was used. Determination of the protective layer of reinforcement was carried out by the device based on magnetic method of nondestructive testing. Cracks parameters were determined by the depth of the cracks with an ultrasonic device; by the crack opening width with a measuring microscope. Control of the spatial position of the containment (rainfall, rolls, rotations) was performed by geodetic measurement methods.

The actual values of the sealed enclosure internal parameters differ from the design results, in addition, the existing calculation models do not take into account the complex distribution of prestressed reinforcement, as well as the ropes’ behavior of the prestressing system. The article discusses the issues of developing an instrumental survey program to eliminate uncertainty in assessing the technical condition of a power generating unit.

The article provides a comparative analysis of the joint application and accuracy of determining the locations by GLONASS, Galileo, BeiDou satellites, obtained from the navigation messages and available forecasting algorithms. Nowadays the high-precision satellite definitions are based not only on the two-frequency measurement mode use, but also on the information inclusion from various existing satellite systems in processing [1,2]. Practical experiments performed in 2016 at latitude B=47° and presented in [3], confirmed the advantages of the GPS and GLONASS satellite systems’ joint use. To date, alternative GNSSs have appeared - the European “Galileo” and the Chinese “BeiDou”, the capabilities’ studies of which are not given due attention to. Therefore, we will try to compare the location determination accuracy by GLONASS, Galileo, BeiDou satellites received by the navigation messages, by comparing them with the exact data provided by the International GNSS Service (IGS), as well as with the available GNSS prediction algorithms available on the satellite observation equipment manufacturer Trimble site.

The possibility of using the heat-storage capacity of the soil massif surrounding the underground protective structure is under consideration with the purpose to minimize the energy costs of the projected system for technological air conditioning of the facility.