Improvement of computer code DRAGON5 for providing support to safety assessment, criticality studies and core simulation of nuclear reactors

改进计算机代码DRAGON5，为核反应堆安全评估、临界性研究和堆芯模拟提供支持

• 批准号: RGPIN-2016-06406
• 负责人: Hébert, Alain
• 金额: $ 2.11万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=710185
• 关键词: Improvement; computer; code; DRAGON5; providing

Neutronics deterministic simulations are based on two software components, one dedicated to the unit fuel assembly and the other dedicated to the full core. The more complex one is the lattice code based on a solution of the Boltzmann equation for neutrons and on specific models. It is used for criticality safety and for reactor physics applications by feeding the full core simulation code with a multi-parameter database. In the last 30 years, École Polytechnique de MontrÉal (EPM) has developed the lattice code DRAGON, now at Version 5, and a 3D diffusion code named DONJON for full core simulations. These two codes are widely distributed across the world under an open-source license and are used by many universities and organizations who are becoming expert users of DRAGON/DONJON. The numerical performance of the solution algorithms for the Boltzmann equation has a strong effect on both the accuracy and the CPU-effectiveness of DRAGON. The short-term objective of this NSERC/DG program is to study the mathematical foundations, accuracy and acceleration issues related to the basic numerical technique used in modern lattice code, in a way to improve the overall performances of DRAGON V5. The long-term objective is to provide software tools and computational schemes to the nuclear industry that will enable them to assess the performance and safety characteristics of existing and new types of nuclear reactors. The first two sub-projects focus on deterministic solution techniques of the Boltzmann equation: (1) Development of a discrete ordinates (SN) method with a Discontinuous Galerkin (DG) scheme; (2) Improve the method of characteristics (MOC) and develop the first-order algebraic collapsing (FOAC) method. Three more sub-projects are defined in order to develop and validate computational schemes based on the most recent advances available in DRAGON V5: (3) Development of two-level computational schemes for PWR (pressurized water reactor) lattices, (4) Development of two-level computational schemes for ASTRID (Advanced Sodium Technological Reactor for Industrial Demonstration) lattices, (5) Development of micro-depletion capabilities for ASTRID-type full-core simulations. Subjects related to the development or improvement of solution techniques for the Boltzmann equation are clearly of the Ph.D. level. Development of the one- and two-level computational schemes in CLE-2000 language and their code-to-code validation with respect to burnup-dependent Monte Carlo simulations is of the level of M.Eng. students. The three M.Eng. sub-projects will be investigated in close relationship with industrial partners such as IRSN and GRS, keeping our focus on production applications.

中子确定性仿真基于两个软件组件，一种用于单位燃料组件，另一个专用于整个核心。更复杂的是基于中子和特定模型的玻尔兹曼方程解决方案的晶格代码。它通过使用多参数数据库馈送完整的核心模拟代码来用于关键性安全和反应堆物理应用。在过去的30年中，ÉcolePolytechniquedeMontréal（EPM）开发了晶格代码龙，现在在第5版处于版本，以及一个名为Donjon的3D扩散代码，用于完整的核心模拟。这两个代码在开源许可下广泛分布在世界范围内，并被许多成为Dragon/Donjon的专家用户的大学和组织使用。 Boltzmann方程的解决方案算法的数值性能对Dragon的准确性和CPU效应都具有很强的影响。该NSERC/DG计划的短期目标是研究与现代晶格代码中使用的基本数值技术相关的数学基础，准确性和加速问题，以改善Dragon V5的整体性能。长期目标是向核工业提供软件工具和计算方案，以使他们能够评估现有类型和新型核反应堆的性能和安全特征。前两个子项目集中于玻尔兹曼方程的确定性解决方案技术：（1）使用不连续的Galerkin（DG）方案开发离散柱（SN）方法； （2）改进特征方法（MOC）并发展一阶代数崩溃（FOAC）方法。 Three more sub-projects are defined in order to develop and validate computational schemes based on the most recent advances available in DRAGON V5: (3) Development of two-level computational schemes for PWR (pressurized water reactor) lattices, (4) Development of two-level computational schemes for ASTRID (Advanced Sodium Technological Reactor for Industrial Demonstration) lattices, (5) Development of micro-depletion capabilities for Astrid型全核模拟。 与Boltzmann方程的解决方案技术的开发或改进有关的受试者显然是博士学位的。等级。在CLE-2000语言中开发一级和两级计算方案及其在依赖燃烧的蒙特卡洛模拟方面的代码对代码验证是M.Eng的水平。学生。三个M.eng。将与IRSN和GRS等工业合作伙伴密切相关的次项目进行调查，从而将我们的专注于生产应用。