标准摘要
[中文适用范围]： ISO 18213 的这一部分规定了准确测定核材料衡算罐中液体高度的程序，这些罐配备了用于确定液体含量的气动系统。 使用此类系统，气体被迫通过探针（浸入管），探针的尖端浸入罐液体中。 产生气泡所需的压力是用距探针尖端一定距离处的压力计测量的。 该程序特别适用于采用非常慢的起泡速率的情况。 需要用已知密度的液体进行一系列液体高度测定来估计储罐的校准方程（参见 ISO 18213-1），该函数将储罐中点的标高（高度）与储罐的独立确定联系起来与该点相关的体积。 出于问责目的，罐的测量方程（其校准方程的倒数）用于确定罐中与给定的液体高度确定相对应的过程液体的体积。 [外文原描述]： ISO 18213-4:2008 specifies a procedure for making accurate determinations of the liquid height in nuclear-materials-accountancy tanks that are equipped with pneumatic systems for determining the liquid content. With such systems, gas is forced through a probe (dip tube) whose tip is submerged in the tank liquid. The pressure required to induce bubbling is measured with a manometer located at some distance from the tip of the probe. This procedure applies specifically when a very slow bubbling rate is employed.
英文名称Nuclear fuel technology — Tank calibration and volume determination for nuclear materials accountancy — Part 4: Accurate determination of liquid height in accountancy tanks equipped with dip tubes, slow bubbling rate