Multi-scenario validation of CALMET-RIMPUFF for local-scale atmospheric dispersion modeling around a nuclear powerplant site with complex topography
Multi-scenario validation of CALMET-RIMPUFF for local-scale atmospheric dispersion modeling around a nuclear powerplant site with complex topography
复制标题
CALMET-RIMPUFF 对复杂地形核电站场地周围局部尺度大气扩散建模的多场景验证
DOI：
10.1016/j.jenvrad.2021.106547
复制
发表时间：
2021-02-06
影响因子：
2.3
通讯作者：
Cao, Jianzhu
中科院分区：
文献类型：
--
作者：
Dong, Xinwen;Zhuang, Shuhan;Cao, Jianzhu
CALMET-RIMPUFF由加州气象模型和Riso中尺度PUFF模型组成，为核应急响应提供精细的大气扩散模型。由于大气扩散模型的性能可能区分大小写，因此多场景验证对于了解模型的行为和限制非常重要。在这项研究中，基于六个风洞实验，模拟了地形复杂、建筑密集的真实中国核电站场地，对CALMET-RIMPUFF进行了多场景验证。 CALMET-RIMPUFF 模拟与垂直风廓线、二维地面风和集中场的测量进行了定性和定量比较。结果表明 CALMET-RIMPUFF 可以以可接受的精度模拟地面风。对于垂直风廓线，精度高度依赖于当地地形和建筑布局。模拟的地面浓度总体上与测量结果吻合良好，尽管羽流轴在三种情况下与测量结果略有差异。由于 CALMET-RIMPUFF 缺少建筑效果模块，因此它在建筑面积上显示出明显的差异。然而，这种差异不会传播到下风山区和海域，其精度相当令人满意。因此，CALMET-RIMPUFF 能够在该地点进行局部规模建模。
The CALMET-RIMPUFF is composed of the California Meteorological Model and the Riso Mesoscale PUFF model, which provides refined atmospheric dispersion modeling for nuclear emergency response. Because the performance of an atmospheric dispersion model can be case-sensitive, a multi-scenario validation is important to understand a model's behavior and limits. In this study, a multi-scenario validation of CALMET-RIMPUFF was performed based on six wind tunnel experiments simulating a real China's nuclear powerplant site with complex topographies and dense buildings. The CALMET-RIMPUFF simulations were compared with the measurements of the vertical wind profiles, 2D ground wind and concentration fields, both qualitatively and quantitatively. The results demonstrate that the CALMET-RIMPUFF can simulate the ground-level wind with acceptable accuracies. For vertical wind profiles, the accuracies show high dependencies on the local topography and building layout. The simulated ground concentrations generally agree well with the measurements, though the plume axis showed slight discrepancies from the measurements in three cases. Because the CALMET-RIMPUFF lacks a building effect module, it shows noticeable discrepancies in the building area. However, such discrepancies do not propagate to the downwind mountainous and sea areas, which the accuracies are quite satisfactory. Thus, the CALMET-RIMPUFF is capable for local-scale modeling at this site.