Panero L M, Arman G, Caccia M, Cavallo D, Chiaberto E M, Chmill V, Faure Ragani M, Magnoni M
Università degli Studi dell'Insubria, 22100 Como, Italy Dipartimento Tematico Radiazioni Ionizzanti, ARPA Piemonte, 10015 Ivrea, Italy
Università degli Studi dell'Insubria, 22100 Como, Italy.
Radiat Prot Dosimetry. 2014 Jul;160(1-3):202-5. doi: 10.1093/rpd/ncu064. Epub 2014 Apr 10.
The internal alpha dose assessment (ICRP 65, 1994) depends on the value of the equilibrium factor F. This parameter is generally not measured and a mean conventional value ranging between 0.4 and 0.6 is assumed, possibly leading to a significant bias in the dose assessments. In this paper, a method for the measurement of F is reported, based on the total aerosol sampling on filters and immediate gross beta counting of 214Pb and 214Bi activities. Measurements are interpreted according to a Raabe-Wrenn and Jacobi simplified room model, leading to an estimate of the individual airborne activities of short-lived radon daughters, the removal parameter and the equilibrium factor. The method was laboratory tested and validated and it is being qualified by field surveys in different indoor environmental conditions.
内照射α剂量评估（ICRP 65，1994）取决于平衡因子F的值。该参数通常未进行测量，而是假定其常规平均值在0.4至0.6之间，这可能会导致剂量评估出现显著偏差。本文报道了一种测量F的方法，该方法基于对滤膜上的总气溶胶进行采样，并对214Pb和214Bi活度进行即时总β计数。测量结果根据Raabe-Wrenn和Jacobi简化房间模型进行解释，从而估算出短寿命氡子体的个体空气活度、去除参数和平衡因子。该方法已在实验室进行测试和验证，并正在通过不同室内环境条件下的现场调查进行鉴定。
