Lauridsen B, Jensen P H
Health Phys. 1983 Dec;45(6):1039-45. doi: 10.1097/00004032-198312000-00002.
This paper describes a measuring procedure for the determination of shielding factors for vehicles passing through areas that have been contaminated by activity released to the atmosphere from a reactor accident. In open areas the radiation field arises from an infinite plane source. In urban areas the radiation field consists of the contribution from fallout deposited on a road and on the buildings lying at both sides of the road. It is assumed that these buildings will attenuate completely the radiation from fallout deposited behind the building. A simulated radiation field from fallout has been approximated by a point source that has been placed in a matrix around and above the vehicle. From measurements on different vehicles with and without passengers shielding factors are recommended for ordinary cars and buses in both urban and open areas, and areas with single family houses.
本文描述了一种测量程序，用于确定车辆通过因反应堆事故释放到大气中的放射性物质而受到污染的区域时的屏蔽因子。在开阔区域，辐射场源自无限平面源。在城市区域，辐射场由沉积在道路及道路两侧建筑物上的沉降物的贡献组成。假定这些建筑物将完全衰减建筑物后方沉降物产生的辐射。沉降物产生的模拟辐射场已通过置于车辆周围及上方矩阵中的点源进行了近似。通过对不同有无乘客的车辆进行测量，推荐了城市和开阔区域以及有独栋房屋区域中普通汽车和公共汽车的屏蔽因子。
