Assessment of the Level of Natural Circulation of VVER-1000 Coolant on the Basis of Experimental Data from the Balakovo NPP

IF 0.4 4区工程技术 Q4 NUCLEAR SCIENCE & TECHNOLOGY Atomic Energy Pub Date : 2023-09-09 DOI:10.1007/s10512-023-00994-5

D. Yu. Kuznetsov, R. Z. Aminov, V. E. Yurin

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Abstract

Given the obligation to safely navigate a full de-energization condition of NPP it is important to study the natural circulation of the coolant in the primary loop of NPP with water-moderated/cooled [pressurized-water] reactors in the event of de-energization of the main circulation pump. At Balakovo NPP No. 3 with 104% load, the power unit underwent complete de-energized along with the main circulation pumps. When switching to natural circulation of the coolant, the temperature in the hot legs dropped from 320 to 300°C. This attests reliable and stable cooling of the core in the condition of natural circulation. A coefficient is proposed for assessing the level of natural circulation. It can be used to determine the flow rate of the circulating coolant on full de-energization of the main circulation pumps. Based on the measurements of the standard information- computational system of a power unit, the residual power release and the coefficient of natural circulation were determined in the entire area of work with the main circulation pumps de-energized for 45 min.

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基于巴拉科沃核电站实验数据的VVER-1000冷却剂自然循环水平评价

考虑到在核电站完全断电的情况下安全航行的义务，在主循环泵断电的情况下，研究水慢化/冷却[压水堆]反应堆一次回路中冷却剂的自然循环是很重要的。在负荷为104%的Balakovo 3号核电站，动力装置与主循环泵一起完全断电。当切换到冷却剂的自然循环时，热腿的温度从320°C下降到300°C。这证明了堆芯在自然循环条件下的可靠稳定冷却。提出了一个评价自然循环水平的系数。它可以用来确定主循环泵完全断电时循环冷却剂的流量。根据动力单元标准信息计算系统的测量结果，确定了主循环泵断电45 min后整个工作区域的剩余功率释放量和自然循环系数。

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来源期刊

Atomic Energy 工程技术-核科学技术

CiteScore

1.00

自引率

20.00%

发文量

100

审稿时长

4-8 weeks

期刊介绍： Atomic Energy publishes papers and review articles dealing with the latest developments in the peaceful uses of atomic energy. Topics include nuclear chemistry and physics, plasma physics, accelerator characteristics, reactor economics and engineering, applications of isotopes, and radiation monitoring and safety.