title: ÐÐ½Ð°Ð»Ð¸Ð· Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð¸Ð½ÑÐµÑÐ²Ð°Ð»Ð° Ð²ÑÐµÐ¼ÐµÐ½Ð¸ Ð½Ð° Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ½ÑÐµ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐ¸ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ Ð°Ð²Ð°ÑÐ¸Ð¹Ð½ÑÑ Ð¿Ð¾ÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾ÑÑÐµÐ¹ Ð½Ð° ÐÐ­Ð¡
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Analysis of the time interval influence on the probabilistic safety characteristics in the simulation of accident sequences for NPP
Creators: name: Ð¤ÐµÐ´Ð¾ÑÐ¾Ð²Ð¸Ñ, ÐÐ°ÑÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸
Ð²ÐµÑÐ¾ÑÑÐ½Ð¾ÑÑÑ ÑÑÐ¶ÐµÐ»Ð¾Ð¹ Ð°Ð²Ð°ÑÐ¸Ð¸
Ð°Ð²Ð°ÑÐ¸Ð¹Ð½Ð°Ñ Ð¿Ð¾ÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾ÑÑÑ
Ð²Ð½ÑÑÑÐµÐ½Ð½Ð¸Ðµ Ð¸ÑÑ Ð¾Ð´Ð½ÑÐµ ÑÐ¾Ð±ÑÑÐ¸Ñ
24-ÑÐ°ÑÐ¾Ð²Ð¾Ð¹ Ð¸Ð½ÑÐµÑÐ²Ð°Ð»
probabilistic safety assessment
nuclear fuel damage probability
emergency sequence
internal initial events
24-hour interval

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description: The subject of the graduate qualification work is Â«Analysis of the time interval influence on the probabilistic safety characteristics in the simulation of accident sequences for NPPÂ». The given work is devoted to studying the dependence of the nuclear fuel damage probability on a given time interval in the simulation of accident sequences at a power unit with VVER-1200. The research set the following goals: 1. Studying methods for level 1 probabilistic safety assessment. 2. Description of systems and elements important for the safety of the considered power unit; 3. Data collection for modelling and construction of a logical-probabilistic model; 4. Analysis of the data obtained during the calculation. The work was carried out using technical documentation, reliability databases and international sources of generalized data. The results of the performed calculations reflect the influence of the block autonomy time taken in the simulation on the value of the probability of a severe accident, including the postulation of failures of some systems or the implementation of unfavorable physical processes. The analysis was carried out by mathematical modeling using the Risk Spectrum PSA software package. As a result, the probabilistic safety assessment (PSA) methodology was analyzed and a logical-probabilistic model of the studied power unit was built. After the analysis of performed calculations, some conclusions connected to modeling methods were drawn.