Alvarez A, Navarro N
Radiological Protection Division, CIEMAT, Madrid, Spain.
Appl Radiat Isot. 1996 Sep-Oct;47(9-10):869-73. doi: 10.1016/s0969-8043(96)00077-2.
The primary goal of radiation protection in decommissioning and decontamination of the old nuclear facilities of the CIEMAT is to monitor and minimize exposure of personnel. Monitoring programs include determination of actinides and 90Sr in biological samples. A technique for the sequential measurement of low levels of 239Pu, 241Am and 90Sr in urine samples has been developed. The method involves coprecipitation of these radionuclides as phosphates from bulk urine sample. Separation of Plutonium is carried out using a conventional anion exchange technique. Americium and strontium isolations are achieved sequentially by chromatographic extraction (Tru.Spec and Sr.Spec columns) from the load and rinse solutions coming from the anion exchange column. Plutonium and Americium measurements are performed by alpha spectrometry. The mean recovery obtained is 80% and the detection limit for 24 h urine sample (1.41) is 0.6 mBq L-1. 90Sr determination is made by liquid scintillation counting. The detection limit in this case is 1.1 E-01 Bq/L.
西班牙能源、环境和技术研究中心（CIEMAT）旧核设施退役与去污过程中辐射防护的主要目标是监测并尽量减少人员暴露。监测计划包括测定生物样品中的锕系元素和90锶。已开发出一种用于顺序测量尿样中低水平239钚、241镅和90锶的技术。该方法包括从大量尿样中以磷酸盐形式共沉淀这些放射性核素。钚的分离采用传统阴离子交换技术。镅和锶的分离通过从阴离子交换柱流出的负载液和冲洗液中进行色谱萃取（Tru.Spec和Sr.Spec柱）依次实现。钚和镅的测量通过α能谱法进行。获得的平均回收率为80%，24小时尿样（1.41）的检测限为0.6毫贝克勒尔/升。90锶的测定通过液体闪烁计数法进行。在这种情况下的检测限为1.1×10⁻¹贝克勒尔/升。
