Contribution of production and loss terms of fission products on in-containment activity under severe accident condition for VVER-1000

被引：2
作者：
Jafarikia, S. [1 ]
Feghhi, S. A. H. [1 ]
机构：
[1] Shahid Beheshti Univ, Dept Radiat Applicat, GC, Tehran, Iran
来源：
NUCLEAR ENGINEERING AND TECHNOLOGY | 2019年 / 51卷 / 01期
关键词：
IRBURN; VVER-1000; reactors; Source term calculation; Containment engineering safety features; NEUTRON IMPORTANCE; BEHAVIOR; PWR;
D O I：
10.1016/j.net.2018.09.003
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The purpose of this paper is to study the source term behavior after severe accidents by using a semi-kinetic model for simulation and calculation of in-containment activity. The reactor containment specification and the safety features of the containment under different accident conditions play a great role in evaluating the in-containment activity. Assuming in-vessel and instantaneous release of radioactivity into the containment, the behavior of in-containment isotopic activity is studied for noble gasses (Kr and Xe) and the more volatile elements of iodine, cesium, and aerosols such as Te, Rb and Sr as illustrative examples of source term release under LOCA conditions. The results of the activity removal mechanisms indicates that the impact of volumetric leakage rate for noble gasses is important during the accident, while the influence of deposition on the containment surfaces for cesium, mainly iodine isotopes and aerosol has the largest contribution in removal of activity during evolution of the accident. (C) 2018 Korean Nuclear Society, Published by Elsevier Korea LLC.
引用
收藏
页码：125 / 137
页数：13
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