Understanding kinetic behaviour of TRIGA reactor core

Q4 Energy

International Journal of Nuclear Energy Science and Technology Pub Date : 2017-11-21 DOI:10.1504/IJNEST.2017.10009091

Rashida Yasmeen, M. S. Mahmood

引用次数: 0

Abstract

The kinetic parameters govern the transient behaviour of a nuclear reactor. Estimation of these parameters has great importance for the safe design and operation of a nuclear reactor. In order to understand the kinetic behaviour of TRIGA core, the influence of graphite dummy elements, absorber materials and beam ports on kinetic parameters has been studied. To do so, the effective delayed neutron fraction (βeff), prompt removal lifetime (e) and mean neutron generation time (Λ) have been calculated for an infinite system of LEU fuel cells. The investigation has been extended to four different cases of TRIGA reactor core. Monte Carlo simulation has been carried out to compute the kinetic parameters by Monte Carlo code MCNP5. The βeff value remains unchanged but the e and Λ values are found to be sensitive to the local perturbations of core components.

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了解TRIGA堆芯的动力学行为

动力学参数控制着核反应堆的瞬态行为。这些参数的估计对于核反应堆的安全设计和运行具有重要意义。为了了解TRIGA堆芯的动力学行为，研究了石墨虚设元件、吸收体材料和束口对动力学参数的影响。为此，计算了无限长LEU燃料电池系统的有效延迟中子分数（βeff）、快速清除寿命（e）和平均中子产生时间（∧）。该调查已扩展到TRIGA反应堆堆芯的四种不同情况。用蒙特卡罗程序MCNP5对动力学参数进行了蒙特卡罗模拟计算。βeff值保持不变，但发现e和∧值对核心部件的局部扰动敏感。

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

International Journal of Nuclear Energy Science and Technology Energy-Nuclear Energy and Engineering

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： Today, nuclear reactors generate nearly one quarter of the electricity in nations representing two thirds of humanity, and other nuclear applications are integral to many aspects of the world economy. Nuclear fission remains an important option for meeting energy requirements and maintaining a balanced worldwide energy policy; with major countries expanding nuclear energy"s role and new countries poised to introduce it, the key issue is not whether the use of nuclear technology will grow worldwide, even if public opinion concerning safety, the economics of nuclear power, and waste disposal issues adversely affect the general acceptance of nuclear power, but whether it will grow fast enough to make a decisive contribution to the global imperative of sustainable development.