比利比诺核电站乏燃料池热运行模式数值模拟的特点

Vladimir N. Sergeev
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引用次数: 0

摘要

本文以比利比诺核电站为例,采用国际工业规范对乏燃料池(SNFP)热-水动力学数值计算模型的开发方法进行了探讨。这些模型开发的目的是考虑到被动和强制对流排热系统,快速模拟乏燃料池在填充、“湿”和干贮存期间(间隔长达50年)的热和湿度运行模式。详细考虑了以下方法学方面:使用同位素动力学代码计算分离乏燃料组件的热动力动力学。2. SNFP“湿式”贮存时蒸发镜排热功率计算方法,包括蒸发功率计算和排风通风操作。利用传热和传质过程的相似定律(路易斯定律)进行蒸发计算。3.SNFP在“湿”储存期间热状态动态的加速计算预测方法。4. SNFP“干”储存后底部大气水分的凝结及其去除方法。结果表明,具有三维多孔体模型和完整蒸发-冷凝模型的TRAC (TRACE)程序最适合求解核能系统热-水两相程序中所考虑的问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SPECIFIC FEATURES OF NUMERICAL SIMULATION OF THERMAL OPERATION MODE THE SPENT FUEL POOLS OF BILIBINO NPP
The paper considers methodological aspects during the development of thermo-hydro-dynamic of numerical calculation models for spent nuclear fuel pool (SNFP) on the example of Bilibino NPP by using international industry codes. The purpose of these models development is the fast simulation of thermal and humidity operational modes of spent fuel pool during periods of filling, "wet" and dry storage with an interval of up to 50 years, taking into account passive and forced convection heat removal systems. The following methodological aspects are considered in detail: 1. Use of isotope kinetics codes for calculating of the heat power dynamics for separate spent fuel assembly. 2. Calculation method of the heat removal power from the evaporation mirror of SNFP during “wet” storage, including evaporation power calculation and exhaust ventilation operation. Using the law of similarity of heat transfer and mass transfer processes (Lewis' law) for evaporation calculations. 3. Methods of accelerated computational forecasting of the dynamics of the thermal regimes of the SNFP during “wet” storage. 4. Condensation of atmospheric moisture at the bottom of the SNFP after “dry” storage and methods for its removal. It is shown that TRAC (TRACE) code with a 3D porous body model and complete evaporation-condensation models is the most suitable for solving the problems under consideration among the system thermo-hydraulic two-phase codes for nuclear energy.
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