标准编号：ISO 18213-6:2008
中文名称：核燃料技术 用于核材料衡算计量的容器校准和容量测定 第6部分：装备浸管的衡算计量罐中液体密度的罐内精确测定
英文名称：Nuclear fuel technology — Tank calibration and volume determination for nuclear materials accountancy — Part 6: Accurate in-tank determination of liquid density in accountancy tanks equipped with dip
发布日期：2008-03
标准范围
This part of ISO 18213 specifies a procedure for making accurate determinations of the densities of processliquids from in-tank measurements of the liquid content. This procedure is applicable to tanks equipped withpneumatic systems for determining the liquid content that have two or more bubbler probes of differing lengths.It is necessary that the probes be fixed relative to each other and to the tank in which they are installed.The methods presented in this part of ISO 18213 yield acceptable results only for clear (i.e. free of suspendedsolids) liquids that are both homogeneous in concentration and at thermal equilibrium. The accuracy of themethod is limited by-- the accuracy of the density determinations for the calibration liquid, and-- the number and accuracy of the liquid height determinations used in the calculations.With state-of-the-art measurement technology and careful technique, and with water as a calibration liquid, itis possible to determine the density of homogeneous clear liquids with relative accuracy1) on the order of2 x 10<(UP)-4> to 3 x 10<(UP)-4>, or approximately 0,2 kg/m3 or 0,3 kg/m3.
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