Abstract

This paper presents an overview of Pronghorn, a multiscale thermal-hydraulic (T/H) application developed by Idaho National Laboratory and the University of California, Berkeley. Pronghorn, built on the open-source finite element Multiphysics Object-Oriented Simulation Environment (MOOSE), leverages state-of-the-art physical models, numerical methods, and nonlinear solvers to deliver fast-running advanced reactor T/H simulation capabilities within a modern software engineering environment. This work summarizes the physical models, multiphysics and multiscale coupling, and numerical discretization in Pronghorn with emphasis on our initial target application to pebble bed reactors (PBRs). A diverse set of applications are shown to depressurized natural circulation in the SANA experiments, forced convection in the Pebble Bed Modular Reactor, three-dimensional (3-D)/one-dimensional coupling of Pronghorn and RELAP-7 systems T/H for loop analysis in the High Temperature Reactor Power Module, and forced convection in the Mark-1 Pebble Bed Fluoride-Salt-Cooled High-Temperature Reactor. A multiphysics coupling of Pronghorn, RELAP-7, and Griffin deterministic neutronics for a gas-cooled PBR demonstrates the capability of the MOOSE framework for reactor design calculations. These applications highlight the verification and validation underlying Pronghorn’s software development while emphasizing features that improve upon capabilities offered by legacy tools in areas such as 3-D unstructured meshing, physics modeling, and multiphysics coupling.

摘要

本文概述了叉角羚，这是一种由爱达荷国家实验室和加州大学伯克利分校开发的多尺度热工水力 (T/H) 应用程序。Pronghorn 基于开源有限元多物理场面向对象仿真环境 (MOOSE)，利用最先进的物理模型、数值方法和非线性求解器在内部提供快速运行的高级反应堆 T/H 仿真功能。现代软件工程环境。这项工作总结了叉角羚的物理模型、多物理场和多尺度耦合以及数值离散化，重点是我们对球床反应器 (PBR) 的初始目标应用。在 SANA 实验中显示了一系列不同的应用来减压自然循环，在球床模块化反应器中强制对流，Pronghorn 和 RELAP-7 系统的三维 (3-D)/一维耦合 T/H 用于高温反应堆功率模块中的回路分析，以及 Mark-1 球床氟化盐冷却高温中的强制对流- 温度反应器。用于气冷 PBR 的叉角、RELAP-7 和 Griffin 确定性中子学的多物理场耦合展示了 MOOSE 框架用于反应堆设计计算的能力。这些应用程序突出了 Pronghorn 软件开发背后的验证和验证，同时强调了改进传统工具在 3-D 非结构化网格划分、物理建模和多物理场耦合等领域提供的功能的功能。Mark-1 球床氟化盐冷却高温反应器中的强制对流。用于气冷 PBR 的叉角、RELAP-7 和 Griffin 确定性中子学的多物理场耦合展示了 MOOSE 框架用于反应堆设计计算的能力。这些应用程序突出了 Pronghorn 软件开发背后的验证和验证，同时强调了改进传统工具在 3-D 非结构化网格划分、物理建模和多物理场耦合等领域提供的功能的功能。Mark-1 球床氟化盐冷却高温反应器中的强制对流。用于气冷 PBR 的叉角、RELAP-7 和 Griffin 确定性中子学的多物理场耦合展示了 MOOSE 框架用于反应堆设计计算的能力。这些应用程序突出了 Pronghorn 软件开发背后的验证和验证，同时强调了改进传统工具在 3-D 非结构化网格划分、物理建模和多物理场耦合等领域提供的功能的功能。