CRITERIA AND CONDITIONS OF THERMAL HYDRODYNAMIC INSTABILITY IN THE CIRCUITS OF NATURAL CIRCULATION OF NUCLEAR POWER PLANTS IN CASE OF LEAK ACCIDENTS

IF 0.5 Q4 PHYSICS, NUCLEAR

Problems of Atomic Science and Technology Pub Date : 2024-04-11 DOI:10.46813/2024-150-066

V. Skalozubov, Yu.O. Komarov, O. Dorozh, A.V. Kanivets, V. Filatov

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Abstract

In today's extreme conditions of operation of nuclear power plants (NPP) of Ukraine, the need to improve systems and strategies for managing accidents with complete long-term blackout (CLTB) is especially urgent. A method of determining the conditions for the occurrence of thermal hydrodynamic instability (THI) in passive safety systems with natural circulation circuits (PSS NC) has been developed, based on the fundamental thermodynamic principles of analyzing the impact on stability of fluctuating deviations of pressure and mass flow of the working medium from the established (equilibrium) state. Using the examples of the small modular reactor (SMP) and the high power reactor (АР1000) of the Westinghouse company, the criteria and conditions of THI in accidents with leaks in the natural circulation circuits of the NPP are defined in a general format. The developed method of determining the criteria and conditions of THI in PSS NC can be applied by design, operating and regulatory organizations for deterministic analysis of the safety of NPPs of the AP/SMP type.

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发生泄漏事故时核电站自然循环回路中热流体力学不稳定性的标准和条件

在当今乌克兰核电站（NPP）的极端运行条件下，迫切需要改进管理长期完全停电（CLTB）事故的系统和战略。根据分析工作介质压力和质量流量波动偏离既定（平衡）状态对稳定性影响的基本热力学原理，已开发出一种确定带自然循环回路（PSS NC）的被动安全系统热流体力学不稳定性（THI）发生条件的方法。以西屋公司的小型模块化反应堆（SMP）和大功率反应堆（АР1000）为例，以通用格式定义了核电厂自然循环回路泄漏事故中 THI 的标准和条件。设计、运营和监管机构可采用所开发的方法确定 PSS NC 中 THI 的标准和条件，对 AP/SMP 型核电厂的安全进行确定性分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Problems of Atomic Science and Technology 物理-核科学技术

CiteScore

0.70

自引率

50.00%

发文量

审稿时长

2-4 weeks

期刊介绍： The journal covers the following topics: Physics of Radiation Effects and Radiation Materials Science; Nuclear Physics Investigations; Plasma Physics; Vacuum, Pure Materials and Superconductors; Plasma Electronics and New Methods of Acceleration.