DYNAMICAL METHOD APPLICATION ANALYSIS FOR SAFETY ASSESSMENT CALCULATION OF VVER UNIT MANEUVERING REGIMES EXPERIMENT

PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. SERIES: NUCLEAR AND REACTOR CONSTANTS Pub Date : 2021-03-26 DOI:10.55176/2414-1038-2021-1-55-65

M. Uvakin, A. Nikolaev, I. Makhin, E. Sotskov

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Abstract

Maneuvering operation test is actual problem of VVER reactors exploitation. Such tests are classified as nuclear hazardous procedures which are accompanied by power variations, regulators actions and continuous space power field fluctuations. As a result a lot of possible initial reactor plant conditions are occurred. This fact should be taken into account during experiment safety assessment. Current work presents calculation analysis results for high powered VVER unit safety assessment which was covered daily maneuvering experiment. All calculations are implemented by KORSAR/GP programming code with 3D-neutrion kinetic model. Quantitative and qualitative criteria show the successful solving of following problems: - Confirmation for normal operation limits adherence, especially for local power distribution parameters. - Reactor plant safety assessment for RIA accidents. Work contains analysis of developed method possibilities for VVER power unit calculation safety assessment during daily power maneuvering. Following criteria has been confirmed: - All conservative approach principles completely comply which has composed usual VVER safety assessment method for 3D neutron kinetic model. - All important features for reactor physics and dynamics during maneuvering have been taken into account. Maneuvering regimes calculations practical and methodical experience will be applied for the same tasks of VVER safety assessment.

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动力方法在机动工况试验安全评价计算中的应用分析

机动运行试验是VVER反应堆开发的实际问题。这类试验被归类为伴随功率变化、监管机构行动和空间功率场连续波动的核危险程序。结果，许多可能的初始反应堆装置条件发生了。在进行实验安全评价时应考虑到这一事实。目前的工作是对大功率VVER机组进行日常机动试验安全评价的计算分析结果。所有的计算都是通过KORSAR/GP编程代码与三维中子动力学模型实现的。定量和定性标准表明成功解决了以下问题:—确认正常运行限制遵守，特别是对局部配电参数。- RIA事故的反应堆工厂安全评估。工作内容包括分析在日常动力机动中VVER动力单元计算安全评估的发展方法的可能性。确定了以下准则:—所有保守方法原则完全符合，构成了三维中子动力学模型常用的VVER安全性评估方法。所有重要的反应堆物理特性和机动过程中的动力学特性都被考虑在内。机动工况计算、实践和方法经验将应用于VVER安全评估的相同任务。

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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PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. SERIES: NUCLEAR AND REACTOR CONSTANTS

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