標準號：ISO 18213-4-2008
中文標準名稱：核燃料技術.核材料衡算用容器校準和體積測定.第4部分:裝備汲取管的衡算容器中液體高度的精確測定、低速起泡率
英文標準名稱：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
標準類型：F40
發布日期：2008/3/15 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：F40
國際標準分類號：27.120.30
適用范圍：This part of ISO 18213 specifies a procedure for making accurate determinations of the liquid height innuclear-materials-accountancy tanks that are equipped with pneumatic systems for determining the liquidcontent. 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 thetip of the probe. This procedure applies specifically when a very slow bubbling rate is employed.A series of liquid height determinations made with a liquid of known density is required to estimate a tank'scalibration equation (see ISO 18213-1), the function that relates the elevation (height) of a point in the tank toan independent determination of tank volume associated with that point. For accountability purposes, thetank's measurement equation (the inverse of its calibration equation) is used to determine the volume ofprocess liquid in the tank that corresponds to a given determination of the liquid height.