ISO 18213-1:2007描述了配备用于测定液体含量的压力测量系统的核工艺储罐的储罐校准和容积测定程序。具体而言，为规划校准活动提供了总体指导，以获得方程式所需的数据，从而估算储罐的体积，并介绍了程序中的关键步骤，以便随后使用估算的体积测量方程式来确定储罐的液体体积。 所述程序特别适用于装有气泡探头系统的储罐，用于测量液体含量。此外，这些程序仅对处于热平衡和静态平衡的清澈（即无悬浮固体）均质液体产生可靠结果。

ISO 18213-1:2007 describes procedures for tank calibration and volume determination for nuclear process tanks equipped with pressure-measurement systems for determining liquid content. Specifically, overall guidance is provided for planning a calibration exercise undertaken to obtain the data required for the equation to estimate a tank's volume and the key steps in the procedure are presented for subsequently using the estimated volume-measurement equation to determine tank liquid volumes. The procedures presented apply specifically to tanks equipped with bubbler probe systems for measuring liquid content. Moreover, these procedures produce reliable results only for clear (i.e., without suspended solids), homogeneous liquids that are at both thermal and static equilibrium.