Mathematical and Computational Modelling for Nuclear Criticality Safety Analysis and Assessment of Interacting Arrays of Loosely Coupled Systems

松耦合系统相互作用阵列核临界安全分析和评估的数学和计算模型

• 批准号: 2461946
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2461946
• 关键词: Mathematical; Computational; Modelling; Nuclear; Criticality

The aim is to develop novel mathematical and computational methods for modelling the nuclear criticality excursion behaviour of interacting arrays of loosely coupled systems containing fissile material where some of the array components are sub-critical and some are super-critical or where an extraneous (or external) neutron source is introduced into the system. In terms of the front and back end of the fuel cycle nuclear material is found in a very wide range of different physical forms and material phases from metallic systems, to powders, to cakes, to slurries, to sludges, to emulsions, to colloids and also suspensions. This material is often stored in a wide range of different containers with different geometries within storage facilities and buildings often as arrays of such storage containers. Interacting arrays containing fissile material can broadly be categorised as well defined arrays or ill-defined arrays. In well-defined interacting arrays the composition, density, size, shape and position of the fissile units or bodies is "a priori" well characterised or known. In addition the distribution and composition of reflecting and moderating materials is defined fairly precisely.Overall this PhD project would provide the MoD contractor with a unique set of methods that can be used to model a wider range of scenarios that currently possible. Most special nuclear material (SNM) is stored in facilities in a wide variety of forms and usually in regularly spaced arrays. The methods will also be of interest to other parts of the nuclear fuel cycle as well.

目的是开发新型的数学和计算方法，以建模含有裂变材料的松散耦合系统相互作用阵列的核临界行为行为，其中某些阵列成分是亚临界的，有些是超临界的，或者是外部的（或外部的） ）中子源被引入系统。就燃料周期的前端和后端而言，核材料的范围很广，从金属系统到粉末，蛋糕，泥浆，污泥，污泥，乳液，乳液，胶体和胶体和胶体，以及也悬挂。该材料通常存储在众多的不同容器中，在存储设施和建筑物中通常是这种存储容器的阵列中的几何形状。可以将包含裂变材料的相互作用阵列广泛分为定义明确的阵列或定义不明的阵列。在定义明确的相互作用阵列中，裂变单元或身体的组成，密度，大小，形状和位置是“先验”的表征或已知的。另外，相当精确地定义了反射和调节材料的分布和组成。此外，该博士项目将为Mod承包商提供一套独特的方法，可用于建模当前可能的更广泛的方案。大多数特殊的核材料（SNM）存储在各种形式的设施中，通常以规则间隔阵列。这些方法也将引起核燃料循环的其他部分。