Ricciardi Laurent, Prévost Corinne, Bouilloux Laurent, Sestier-Carlin Roger
Institute for Radiological Protection and Nuclear Safety (IRSN), Airborne Pollutants and Containment Study and Research Department, DSU/SERAC, BP 68, 91192 Gif-sur-Yvette cedex, France.
J Hazard Mater. 2008 Apr 1;152(2):493-505. doi: 10.1016/j.jhazmat.2007.07.034. Epub 2007 Jul 17.
In order to better evaluate the consequences of an accidental release of heavy gas, such as uranium hexafluoride (UF(6)), in some installations in the nuclear fuel cycle, an experimental and numerical study was conducted by IRSN on heavy gas dispersion in a ventilated room. This study was based on about 20 injection configurations of a large quantity of a heavy tracer gas, sulphur hexafluoride (SF(6)), inside two ventilated rooms of different sizes. Stratification of the tracer gas was detected in all the configurations studied, even at low concentrations. Numerical simulations performed with the multidimensional CFX code enabled the stratification and the concentration levels reached in the rooms to be predicted overall, and the higher the air flow rate, the more satisfactory the comparison between simulation and experiment.
为了更好地评估在核燃料循环中的某些设施中，诸如六氟化铀（UF(6)）等重气体意外释放的后果，法国核安全与辐射防护研究院（IRSN）针对重气体在通风房间内的扩散开展了一项实验和数值研究。该研究基于在两个不同尺寸的通风房间内对大量重示踪气体六氟化硫（SF(6)）进行的约20种注入配置。在所研究的所有配置中均检测到示踪气体分层现象，即使在低浓度情况下也是如此。使用多维CFX代码进行的数值模拟能够总体预测房间内的分层情况以及达到的浓度水平，并且空气流速越高，模拟与实验之间的比较就越令人满意。
