ISO INTERNATIONAL STANDARD 18213-5 First edition 2008-03-15 Nuclear fuel technology Tank calibration and volume determination for nuclear materials accountancy - Part 5: Accurate determination of liquid height in accountancy tanks equipped with dip tubes, fast bubbling rate Technologie du combustible nucleaire-Etalonnage et determination duvolumedecuvepourlacomptabilitedesmatieresnucléaires Partie5:Determination precisede la hauteurde liquide dans une cuve bilanéquipeedecannesdebullage,bullagerapide Reference number ISO 18213-5:2008(E) @ISO 2008 ISO18213-5:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2008 - All rights reserved ISO 18213-5:2008(E) Contents Page Foreword. Introduction 1 Scope 2 Physical principles involved... 3 Required equipment, measurement conditions, and operating procedures.. 4 Determinationofheightfrommeasurementsofpressure 5 Results.. AnnexA(informative)Estimationofquantitiesthataffectthedeterminationof liquidheight.... Bibliography.... @ ISo 2008 All rights reserved ii ISO 18213-5:2008(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75%of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO18213-5was prepared by Technical CommitteeISO/TC 85,Nuclear energy,Subcommittee SC 5 Nuclear fuel technology. IsO 18213 consists of the following parts, under the general title Nuclear fuel technology-Tank calibration andvolumedeterminationfornuclearmaterialsaccountancy: Part1:Proceduraloverview Part2:Datastandardizationfortankcalibration Part 3:Statisticalmethods Part4:Accurate determination of liquid height in accountancy tanks equipped with dip tubes,slow bubblingrate Part 5: Accurate determination of liquid height in accountancy tanks equipped with dip tubes, fast bubbling rate Part 6: Accurate in-tank determination of liquid density in accountancy tanks equipped with dip tubes iv @ISO 2008-All rights reserved ISO 18213-5:2008(E) Introduction IsO 18213 deals with the acquisition, standardization, analysis, and use of calibration data to determine liquid parts,ISO 18213-1 (procedural overview),ISO18213-2 (data standardization),ISO18213-3 (statistical methods), ISO 18213-4 (slow bubbling rate) and ISO 18213-6 (in-tank determination of liquid density). bubbling rate is given in ISO 18213-4. Measurements of the volume and height of liquid in a process accountancy tank