BS ISO 8300-2013 Nuclear fuel technology Determination of plutonium content in plutonium dioxide of nuclear grade quality Gravimetric method《核燃料技术 核级二氧化钚中钚含量的测定 重量法》.pdf
《BS ISO 8300-2013 Nuclear fuel technology Determination of plutonium content in plutonium dioxide of nuclear grade quality Gravimetric method《核燃料技术 核级二氧化钚中钚含量的测定 重量法》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 8300-2013 Nuclear fuel technology Determination of plutonium content in plutonium dioxide of nuclear grade quality Gravimetric method《核燃料技术 核级二氧化钚中钚含量的测定 重量法》.pdf(18页珍藏版)》请在麦多课文档分享上搜索。
1、BSI Standards Publication BS ISO 8300:2013 Nuclear fuel technology Determination of plutonium content in plutonium dioxide of nuclear grade quality Gravimetric methodBS ISO 8300:2013 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 8300:2013. The UK participat
2、ion in its preparation was entrusted to Technical Committee NCE/9, Nuclear fuel cycle technology. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are resp
3、onsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013 ISBN 978 0 580 75790 7 ICS 27.120.30 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the S
4、tandards Policy and Strategy Committee on 31 December 2013. Amendments issued since publication Date Text affectedBS ISO 8300:2013 ISO 2013 Nuclear fuel technology Determination of plutonium content in plutonium dioxide of nuclear grade quality Gravimetric method Technologie du combustible nuclaire
5、Dtermination de la teneur en plutonium dans du dioxyde de plutonium de qualit nuclaire Mthode gravimtrique INTERNATIONAL STANDARD ISO 8300 Second edition 2013-12-15 Reference number ISO 8300:2013(E)BS ISO 8300:2013ISO 8300:2013(E)ii ISO 2013 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2013
6、All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested
7、 from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 8300:2013ISO 8300:2013(E) ISO 2013 All
8、 rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Principle 1 3 Interferences 1 4 Apparatus . 1 5 Procedure. 2 5.1 Handling of the sample at the sampling station . 2 5.2 Tarring of crucibles . 2 5.3 Sub-sampling 2 5.4 Heating . 2 5.5 Additional measurements . 2 6 Expression
9、 of result . 3 6.1 Calculation of the gravimetric conversion factor 3 6.2 Calculation of impurity correction factor 3 6.3 Calculation of plutonium concentration . 3 6.4 Repeatability . 4 6.5 Systematic errors 4 7 Test report . 4 Annex A (informative) Gravimetric conversion factor for the non-volatil
10、e impurities .5BS ISO 8300:2013ISO 8300:2013(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each m
11、ember body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
12、Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different ty
13、pes of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not b
14、e held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is infor
15、mation given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see t
16、he following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 85, Nuclear energy, nuclear technologies, and radiological protection, Subcommittee SC 5, Nuclear fuel cycle. This second edition cancels and replaces the first edition (ISO 8300:1987), of wh
17、ich it constitutes a minor revision.iv ISO 2013 All rights reservedBS ISO 8300:2013ISO 8300:2013(E) Introduction The method specified in this International Standard is based on an oxidation of the plutonium followed by weighing. If the content of impurities is measured, a correction is made to allow
18、 for them. Respecting certain conditions, the overall standard deviation on a single determination (gravimetric determination and impurities correction) can be below 0,1 %. ISO 2013 All rights reserved vBS ISO 8300:2013BS ISO 8300:2013Nuclear fuel technology Determination of plutonium content in plu
19、tonium dioxide of nuclear grade quality Gravimetric method 1 Scope This International Standard specifies a precise and accurate gravimetric method for determining the plutonium content in plutonium dioxide (PuO 2 ) of nuclear grade quality, containing a mass fraction of less than 0,65 % of non-volat
20、ile impurities. The method is used to cross-check accountancy analyses of plutonium dioxide. 2 Principle The method specified in this International Standard consists of the following: a) sampling and weighing of the sample in dry atmosphere; b) heating in air between 1 200 C and 1 250 C to constant
21、mass in order to obtain a stoichiometric plutonium dioxide, which is stable and non-hygroscopic; c) weighing of the plutonium dioxide; d) impurity analysis and correction for non-volatile impurities; e) calculation of plutonium concentration; f) calculation of the plutonium content using a gravimetr
22、ic conversion factor which depends slightly on the isotopic composition of the plutonium. If the latter is not known, it shall be measured, usually by mass spectrometry. 3 Interferences All impurities which are not volatile at 1 200 C cause a positive bias in the analysis. Their actual content shall
23、 be measured with appropriate techniques, including, for example, atomic emission or absorption spectroscopy. If the total non-volatile impurities content is of a mass fraction of up to 0,1 %, the overall uncertainty of the measurement will depend on the precision of the impurities determination. 4
24、Apparatus 4.1 Sub-sampling station, comprising a glove box under dry atmosphere (dew point less than or equal to 40 C) equipped with an analytical balance accurate to 0,1 mg. 4.2 Heating box, supplied with ambient air and equipped with a temperature-regulated muffle furnace capable of operating at 1
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