The relevance of the study is the need to improve the reliability of non-contact control of the geometric parameters of fuel assemblies under conditions of limited access to the objects and exposure to ionizing radiation. The implementation of the parallax-shift method, which uses sequential frames acquired by a television camera during its arc-shaped motion to form quasi-stereo pairs of images, requires the selection of an imaging device that simultaneously provides sufficient spatial resolution, radiation resistance, temperature stability, and stability of image parameters. The aim of this study is to substantiate the selection of a charge-coupled device (CCD)-based television camera for a non-contact system for measuring the height differences of fuel assemblies under radiation exposure. Methods. Requirements for the main technical characteristics of the camera were established based on the operating conditions in the core of a water-cooled, water-moderated power reactor. A weighted-criteria method was applied to comparatively evaluate the alternatives, taking into account radiation resistance, operating temperature range, spatial resolution, geometric stability, and characteristics of the generated image. In addition, the influence of camera parameters on the accuracy of subsequent height-difference determination using the parallax-shift method was evaluated. Results. A comparative analysis of five television camera models was performed. The Hitachi KP-DE500R camera was identified as the most preferable option, with an integrated score of Q = 0,91. It was demonstrated that the selected camera provides the required television image quality and possesses the characteristics necessary for forming quasi-stereo pairs during arc-shaped camera motion. Verification of the measurement method using subpixel localization of informative image elements and the accumulation of approximately 250 quasi-stereo pairs demonstrated the feasibility of determining height differences with an accuracy of 1.3--2.0 mm. The novelty of the study lies in substantiating the selection of the type and specific model of a television camera for a measurement system based on the parallax-shift method, taking into account a combination of operational and metrological requirements. Practical significance. The results obtained can be used in the development of non-contact television inspection systems for monitoring the geometric parameters of fuel assemblies at nuclear power plants.

Problem statement (relevance). The digital educational environment of a specialized university, which has evolved as a set of loosely coupled automated systems, successfully handles administrative support and content delivery, but proves to be fundamentally limited in providing end-to-end competency analytics, personalized career guidance, adaptability to labour market dynamics, and diagnostics of its own integration integrity. Overcoming these limitations requires the introduction of a specialized educational technology -- IT‑Skills -- whose success depends on the validity of a system of information-functional principles. Earlier, the author proposed a two‑level system comprising five basic (necessary) and four optional (sufficient) principles. The validity of the latter requires rigorous proof. The aim of this work is to prove the validity of the principles of adaptability, personalization, analytics, and diagnosability for integrating IT‑Skills technology into the digital educational environment. To prove this, a modified reasoning-from-the-alternative method is applied: for each principle, an antithesis is constructed, and a cause-and-effect analysis reveals the degradation in the indicators of skill model currency, goal alignment accuracy, reporting completeness, and integration failure detection time. The novelty lies in the fact that for the first time the four optional principles are substantiated as sufficient conditions that transform integration from a mere technical act into a meaningful renewal of the digital educational environment. The result of the work is a proof of the necessity of adhering to the optional principles; a holistic regulatory framework for integration is established, which is hypothesized to meet the information-functional needs of all participants in the educational process. The theoretical significance lies in the formalization of integration effectiveness indicators through mathematical expressions; quantitative criteria are also introduced for verifying the effectiveness of each principle. The practical significance is that compliance with the substantiated principles collectively ensures an improvement in the quality of IT personnel training.