ADS加速器束流瞬变分析程序开发

Development of a Beam Transient Code for ADS

加速器驱动的反应堆系统(ADS)中次临界堆芯的功率水平依靠强流质子轰击散裂靶产生的中子源来维持,质子束流的不稳定性将对次临界堆的功率水平产生影响,进而对ADS的安全性产生影响。本文研究了ADS系统束流瞬变事故特性,建立了相应的物理数学模型,设计开发出具有较强针对性的用于ADS系统束流瞬变事故仿真软件——SIMULINK-ADS。并选取了典型的束流瞬变工况进行分析,通过与OECD/NEA和FZK Karlsruhe研究成果进行比较,验证了SIMULINK-ADS程序能够有效地计算和分析ADS束流瞬变次临界反应堆堆芯物理及热工响应。

Accelerator Driven System （ADS） will be a transition between the current nuclear system and the complete application of fusion energy. Because the maintain of power level in ADS relies on the neutron source generated through intensive proton beam hitting spallation target, the instability of proton beam as well as trips in any form will influence the reactor power level and further the safety of ADS. Currently, the research of trip problem is becoming internationally a hot issue in ADS research. Beam transient change accident in ADS is extensively studied in this paper, and the physical and mathematical simulation models is established. Finally, the special software-SIMULINK-ADS dedicating to ADS beam transient change accident is designed and developed. Through the analysis of typical beam transient change accident, simulation results are obtained and recorded, which tally satisfying with the results of OECD/NEA and FZK Karlsrnhe research institutions. The results show that SIMULINK-ADS can effectively compute and analyze the subcritical physics and transient thermal-hydraulic characteristics of ADS.