Development of a GPU-accelerated thermal hydraulic code for pebble-bed fluoride-salt cooled high temperature reactor core

Yanzhi E; Yang ZOU; Wei GUO; Yu PENG; Hongjie XU

doi:10.11889/j.0253-3219.2017.hjs.40.070603

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Development of a GPU-accelerated thermal hydraulic code for pebble-bed fluoride-salt cooled high temperature reactor core

更新时间：2021-05-19

- Development of a GPU-accelerated thermal hydraulic code for pebble-bed fluoride-salt cooled high temperature reactor core
- NUCLEAR TECHNIQUES Vol. 40, Issue 7, Article number: 070603(2017)
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.中国科学院大学北京 100049
- 作者简介：
- 基金信息：
  
  Strategic Pilot Science and Technology Project of Chinese Academy of Sciences
- DOI：10.11889/j.0253-3219.2017.hjs.40.070603
  CLC： TL333
- Received：07 March 2017，
  
  Revised：20 April 2017，
  
  Published：10 July 2017
- 稿件说明：
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Yanzhi E, Yang ZOU, Wei GUO, et al. Development of a GPU-accelerated thermal hydraulic code for pebble-bed fluoride-salt cooled high temperature reactor core[J]. Nuclear techniques, 2017, 40(7): 070603
DOI：

Yanzhi E, Yang ZOU, Wei GUO, et al. Development of a GPU-accelerated thermal hydraulic code for pebble-bed fluoride-salt cooled high temperature reactor core[J]. Nuclear techniques, 2017, 40(7): 070603 DOI： 10.11889/j.0253-3219.2017.hjs.40.070603.

摘要

球床式氟盐冷却高温堆（Pebble Bed Fluoride-salt Cooled High Temperature Reactor

PB-FHR）是一种先进的第四代反应堆。三维堆芯热工水力程序能够模拟具有复杂空间效应的工况，但计算耗时较高。图形处理器（Graphics Processing Unit

GPU）具有大量计算单元，可有效提高程序的计算速度。本文研发了GPU加速的PB-FHR堆芯热工水力程序（GPU-accelerated Thermal Hydraulic Code

GATH），采用非热平衡多孔介质模型建立堆芯物理模型，研究并实现了GPU高速求解算法。对PB-FHR的堆芯模型进行了热工水力分析，与商用计算流体力学软件ANSYS CFX的计算结果进行了对比，验证了程序的正确性。GPU加速性能分析的结果表明，程序整体的加速比率可达8.39倍，证明所研发的GPU求解算法能有效提升堆芯热工水力分析的计算效率。

Abstract

Background

Pebble bed fluoride-salt cooled high temperature reactor (PB-FHR) is a kind of Generation IV reactor. Three-dimensional thermal hydraulic code of reactor core is expected to simulate cases with complex spatial effect for PB-FHR but takes very heavy time-consuming. Graphics processing unit (GPU) contains numerous computing cores

thus can be used to efficiently accelerate numerical calculation if applied properly.

Purpose

This study aims to develop a GPU-accelerated thermal-hydraulic code (GATH) for PB-FHR core.

Methods

Thermal non-equilibrium porous media theory is adopted to build the reactor core physical model. Efficient iterative algorithms are researched and implemented on GPU. A PB-FHR core model is built for thermal hydraulic analysis with GATH. Simulation results are compared with ANSYS CFX software to verify GATH code and the GPU acceleration performance is analyzed.

Results

The results between GATH and CFX are in good agreement. The speedup ratio of GATH can reach 8.39 times.

Conclusion

The physical model and calculation method adopted in GATH code are right. The GPU accelerating methods proposed in this paper can efficiently accelerate thermal hydraulic simulation.

关键词

Keywords

references

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