BS-EN-12679-2000.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12679:2000 The Euro
2、pean Standard EN 12679:1999 has the status of a British Standard ICS 19.100 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Non-destructive testing Determination of the size of industrial radiographic sources Radiographic method Licensed Copy: sheffieldun sheffieldun, na, Sat
3、Oct 28 06:30:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 January 2000 BSI 01-2000 ISBN 0 580 35225 0 BS EN 1
4、2679:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the English language version of EN 12679:1999. The UK participation in its preparation was entrusted to Technical Committee WEE/46, Non-destructive testing, which has the responsibility to:
5、aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represe
6、nted on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence
7、 Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself
8、confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Cop
9、y: sheffieldun sheffieldun, na, Sat Oct 28 06:30:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation
10、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12679:1999 E EUROPEAN STANDARDEN 12679 NORME EUROPE ENNE EUROPA ISCHE NORM October 1999 ICS 19.100 English version Non-destructive testing Determination of the size of industrial radiographic sources Radiographic m
11、ethod Essais non destructifs De termination des dimensions des sources de radiographie industrielle Me thode par radiographie Zersto rungsfreie Pru fung Bestimmung der Strahlergro en von industriell genutzten Radio-Nukliden Durchstrahlungsverfahren This European Standard was approved by CEN on 3 Sep
12、tember 1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be
13、obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central
14、Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. L
15、icensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:30:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12679:1999 BSI 01-2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 138, Non-destructive testing, the Secretariat of which is held by AFNOR. This Eur
16、opean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2000, and conflicting national standards shall be withdrawn at the latest by April 2000. According to the CEN/CENELEC Internal Regulations, the nation
17、al standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. In
18、the framework of its scope, Technical Committee CEN/TC 138 entrusted CEN/TC 138/WG 1, Ionizing radiations, with preparing the following standard: EN 12679, Non-destructive testing Determination of the size of industrial radiographic sources Radiographic method. Contents Page Foreword2 1Scope3 2Defin
19、itions3 3Test equipment (film technique)3 4Test equipment (real time technique)3 5Measurement and determination of source size d3 6Test report4 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:30:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12679:1999 BSI 01-2000 1 Scope This sta
20、ndard specifies the determination of the size of gamma radiographic sources of 0,5 mm or greater, made from the radionuclides Iridium 192, Ytterbium 169, Selenium 75, or Cobalt 60, by a method of radiography with X-rays. The source size of a gamma radiography source is an important factor which affe
21、cts the image quality of gamma ray images. The source size is determined with an accuracy of10 % or 0,1 mm max. This standard can be used for other radionuclides after validation. Warning. Exposure of any part of the human body to X-rays or gamma-rays can be highly injurious to health. Wherever X-ra
22、y equipment or radioactive sources are in use, it is essential to apply the appropriate legal requirements. 2 Definitions For the purposes of this standard, the following definition applies. 2.1 source size d size of the source of radiation 3 Test equipment (film technique) 3.1 Test alignment The X-
23、ray equipment has to be placed at a minimum filmfocus-distance of 700 mm. The film shall be placed perpendicular to the axis of the X-ray beam; the gamma source shall be placed on the axis between the X-ray source and the film; the gamma source to film distance b shall be 10 % to 20 % of the X-ray s
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