Bailiff I K, Stepanenko V F, Göksu H Y, Bøtter-Jensen L, Correcher V, Delgado A, Jungner H, Khamidova L G, Kolizshenkov T V, Meckbach R, Petin D V, Orlov M Yu, Petrov S A
Luminescence Laboratory, Environmental Research Centre, University of Durham, South Road, Durham DH1 3LE, UK.
Health Phys. 2005 Sep;89(3):233-46. doi: 10.1097/01.hp.0000164654.66585.20.
The cumulative absorbed dose in fired-clay bricks collected from ten buildings in the populated contaminated settlement (137Cs, 1,470 kBq m(-2)) of Stary Vishkov, located 175 km downwind of the Chernobyl Nuclear Power Plant (NPP) in the Bryansk administrative region of Russia, was determined using luminescence techniques by five laboratories. At each location, the cumulative dose, after subtraction of the natural background dose, was translated to absorbed dose in air using conversion factors derived from Monte Carlo simulations. The simulations employed source distributions inferred from contemporary soil contamination data and also took into account heterogeneity of fallout deposition. At four locations the cumulative dose at a reference location was calculated, enabling the luminescence determinations to be compared directly with values of cumulative absorbed dose in air obtained using deterministic models. A "local" conversion factor was also derived from the Monte Carlo simulations for locations where the disturbance of soil was significant. Values of the "local" cumulative dose in air calculated using this factor were compared with those predicted using the deterministic models at each sampled location, allowing location factors to be calculated. The methodology developed is generally applicable to populated areas contaminated by radioactive fallout in which brick buildings are found. The sensitivity of the luminescence techniques for bricks from this region of Russia was sufficient to evaluate cumulative absorbed dose in brick due to fallout of less than 20 mGy.
来自俄罗斯布良斯克行政区切尔诺贝利核电站（NPP）下风175公里处斯塔里·维什科夫有人居住的受污染定居点（137Cs，1470 kBq m(-2)）的十座建筑物中收集的烧制粘土砖的累积吸收剂量，由五个实验室使用发光技术测定。在每个地点，减去天然本底剂量后的累积剂量，使用蒙特卡罗模拟得出的转换因子转换为空气中的吸收剂量。模拟采用从当代土壤污染数据推断出的源分布，并考虑了沉降物沉积的不均匀性。在四个地点计算了参考地点的累积剂量，从而能够将发光测定结果与使用确定性模型获得的空气中累积吸收剂量值直接进行比较。还从蒙特卡罗模拟中得出了土壤扰动显著的地点的“局部”转换因子。使用该因子计算的空气中“局部”累积剂量值与每个采样地点使用确定性模型预测的值进行了比较，从而能够计算地点因子。所开发的方法通常适用于发现有砖房的受放射性沉降物污染的人口密集地区。俄罗斯该地区砖块的发光技术灵敏度足以评估因沉降物导致的砖块中小于20 mGy的累积吸收剂量。
