ISO INTERNATIONAL STANDARD 7097-1 First edition 2004-07-01 Nuclear fuel technology Determination of uranium in solutions, uranium hexafluoride and solids - Part 1: Iron(ll) reduction/potassium dichromate oxidation titrimetric method Technologie du combustible nucleaire - Dosage de I'uranium dans des solutions, Ihexafluorure d'uranium et des solides- Partie 1: Methode titrimetrique par reduction au fer(ll) et oxydation au bichromate de potassium Reference number ISO 7097-1:2004(E) @ ISO 2004 Copyright International Organization for Standardization Not for Resale ISO 7097-1:2004(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 shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In 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 parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ?ISO2004 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 memberbody in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 4122 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland CopyightInternatinal organization for Standardization @ ISo 2004 - All rights reserved vithout license from IHS Not for Resale ISO 7097-1:2004(E) Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Principle 4 Reactions and interference 4.1 Reactions 4.2 Interferences 5 Reagents 6 Apparatus 7 Sample preparation. 7.1 General..... 7.2 Uraniummetal 7.3 Uranium dioxide pellets. 7.4 Uranium oxide powder (UO2, UO3, U3Og) 7.5 Uranium hexafluoride, 7.6 Uranyl nitrate hexahydrate 8 Procedure 9 Expression of the results 9.1 General. 8 9.2 Method of calculation 8 9.3 Repeatability. 10 9.4 Bias, 10 10 Test repor 10 Annex A (informative) Information about sampling and calculations of results ... 11 Bibliography 14 ii from IHS Not for Resale ISO 7097-1:2004(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the 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. 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. ISO 7097-1 was prepared by Technical Committee ISO/TC 85, Nuclear energy, Subcommittee SC 5, Nuclear fueltechnology. has been technically revised, and IsO 9989:1996. Iso 7097 consists of the following parts, under the general title Nuclear fuel technology - Determination of uranium in solutions, uranium hexafluoride and solids: Part 1: Iron(ll) reduction/potassium dichromate oxidation titrimetric method Part2:Iron(ll)reduction/cerium(/V)oxidationtitrimetricmethod @ IS0 2004 - All rights reserved ization for Standardizatio ISO 7097-1:2004(E) Introduction This part of Iso 7097 describes procedures for