EN ISO 9271:2024
(Main)Decontamination of radioactively contaminated surfaces - Testing of decontamination agents for textiles (ISO 9271:2023)
Decontamination of radioactively contaminated surfaces - Testing of decontamination agents for textiles (ISO 9271:2023)
This document applies to the testing of the decontamination of textiles, which are contaminated by radioactive materials.
The test method describes the technique to assess the efficiency of decontamination agents (see ISO 7503-1 and ISO 7503-3).
This document applies to the testing of detergents, which may be used in aqueous solutions for the purpose of cleaning radioactively contaminated textiles.
The radionuclides used in this test are those commonly found in the nuclear industry (60Co and 137Cs or 134Cs) in aqueous form. The test can also be adapted for use with other radionuclides and other chemical forms, depending on the customer requirements, if the solutions are chemically stable and do not damage the test specimen.
The test method is not suitable if the radionuclide emits low energy gamma rays, like 55Fe, or low energy beta or alpha particles that are readily attenuated in the textile fabrics, or if the nuclide has a chemical or isotopic interaction with the detergent used in the method (e.g. tritium which could be in several chemical forms).
The test method does not apply to the testing of the ability of detergents to remove non-radioactive dirt.
Dekontamination von radioaktiv kontaminierten Oberflächen - Prüfung von Dekontaminationswaschmitteln für Textilien (ISO 9271:2023)
Décontamination des surfaces contaminées par la radioactivité - Essai des agents de décontamination pour les textiles (ISO 9271:2023)
Dekontaminacija radioaktivno onesnaženih površin - Testiranje dekontaminacijskih sredstev za tekstil (ISO 9271:2023)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2024
Dekontaminacija radioaktivno onesnaženih površin - Testiranje
dekontaminacijskih sredstev za tekstil (ISO 9271:2023)
Decontamination of radioactively contaminated surfaces - Testing of decontamination
agents for textiles (ISO 9271:2023)
Dekontamination von radioaktiv kontaminierten Oberflächen - Prüfung von
Dekontaminationswaschmitteln für Textilien (ISO 9271:2023)
Décontamination des surfaces contaminées par la radioactivité - Essai des agents de
décontamination pour les textiles (ISO 9271:2023)
Ta slovenski standard je istoveten z: prEN ISO 9271
ICS:
13.280 Varstvo pred sevanjem Radiation protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 9271
Second edition
2023-02
Decontamination of radioactively
contaminated surfaces — Testing of
decontamination agents for textiles
Décontamination des surfaces contaminées par la radioactivité —
Essai des agents de décontamination pour les textiles
Reference number
ISO 9271:2023(E)
ISO 9271:2023(E)
© ISO 2023
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Published in Switzerland
ii
ISO 9271:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 2
3.2 Symbols . 3
4 Principle . 3
5 Apparatus . 4
5.1 Beakers . 4
5.2 Radiation detector . . . 4
5.3 Pipettes . 5
5.4 Two polytetrafluoroethylene (PTFE) or quartz ampoules . 5
5.5 Thermostat . 5
5.6 Storage bottles . 5
5.7 Drying cabinet . . 5
5.8 Mounting . 5
5.9 Cage-stirrer apparatus . 6
6 Contamination and decontamination agents . 6
6.1 Contaminant solutions . 6
6.1.1 Composition of contaminant solutions . 6
6.1.2 Preparation of the contaminant solutions. 6
6.1.3 Storage of the contaminant solution . 7
6.2 Decontamination agents . 7
7 Contaminated textile specimen .7
7.1 Reference materials . 7
7.2 Number and dimensions of contaminated textile specimens . 8
8 Procedure .8
8.1 Determining the specific pulse rate of each contaminant solution . 8
8.2 Preparation of the textile specimens . 8
8.3 Contamination . 9
8.3.1 Preparation . 9
8.3.2 Procedure . 9
8.4 Decontamination . 10
8.4.1 Preparation . 10
8.4.2 Procedure . 10
8.5 Determining the residual pulse rate, I . 11
r
9 Calculation of results and assessment of ease of decontamination .11
10 Test report .12
Annex A (informative) Clamp specimen holder .13
Annex B (normative) Cage-stirrer apparatus for decontamination .14
60 137 134
Annex C (informative) Formulae for the preparation of Co and Cs or Cs contaminant
solutions .23
Annex D (informative) Example of a test report .26
Bibliography .28
iii
ISO 9271:2023(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 member body interested in a subject for which a technical
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organizations, governmental and 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.
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 types 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
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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 information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 85 Nuclear energy, nuclear technologies,
and radiological protection, Subcommittee SC 2, Radiological protection.
This second edition cancels and replaces the first edition (ISO 9271:1992), which has been technically
revised.
The main changes are as follows:
— the scope was rephrased and specified;
— opening to further applications;
— adding of symbols of the used measurands;
— improvement of structure;
— improvement in readability;
— adaption to current standards;
— adding a new form in the Annex with description the properties of the agents to be tested.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO 9271:2023(E)
Introduction
Wherever radioactivity is used, there is a risk that textiles can become contaminated through contact
with radioactivity in solution or airborne radioactivity.
It is normally necessary to remove this contamination to reduce the risk to staff from accidental intake
of the radioactivity on the surface. The ease of decontaminating textiles is therefore an important
parameter to consider when selecting materials to use, e.g., for facilities in the nuclear industry, in
radionuclide laboratories or nuclear medicine facilities.
This document defines a quantitative method under objective conditions for testing the ease of
decontamination of textile fabric. The method enables the comparison of different textile materials to
support decisions on textiles for use in different applications.
For the test, radioactive solutions are deposited onto a sample of the material being studied. The
60 137 134
solutions contain radionuclides commonly found in nuclear industry ( Co, Cs or Cs) and
are in aqueous form. The textiles are then cleaned with detergents or cleansing agent, to be tested,
and the residual activity on the textiles is measured to give a quantitative measure of the ease of
decontamination.
...
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