EN ISO 11665-2:2019
(Main)Measurement of radioactivity in the environment - Air: radon-222 - Part 2: Integrated measurement method for determining average potential alpha energy concentration of its short-lived decay products (ISO 11665-2:2019)
Measurement of radioactivity in the environment - Air: radon-222 - Part 2: Integrated measurement method for determining average potential alpha energy concentration of its short-lived decay products (ISO 11665-2:2019)
This document describes integrated measurement methods for short-lived radon‑222 decay products[4]. It gives indications for measuring the average potential alpha energy concentration of short‑lived radon-222 decay products in the air and the conditions of use for the measuring devices.
This document covers samples taken over periods varying from a few weeks to one year. This document is not applicable to systems with a maximum sampling duration of less than one week.
The measurement method described is applicable to air samples with potential alpha energy concentration of short-lived radon-222 decay products greater than 10 nJ/m3 and lower than 1 000 nJ/m3.
NOTE For informative purposes only, this document also addresses the case of radon-220 decay products, given the similarity in behaviour of the radon isotopes 222 and 220.
Ermittlung der Radioaktivität in der Umwelt - Luft: Radon-222 - Teil 2: Integrierendes Messverfahren für die Bestimmung des Durchschnittswertes der potenziellen Alpha-Energiekonzentration der kurzlebigen Radon-Folgeprodukte (ISO 11665-2:2019)
Dieses Dokument beschreibt integrierende Messverfahren für kurzlebige 222Rn-Folgeprodukte [4]. Es gibt Hinweise für die Bestimmung des Durchschnittswerts der potenziellen Alpha-Energiekonzentration der kurz-lebigen 222Rn-Folgeprodukte in der Luft und für die Bedingungen zum Einsatz der Messgeräte.
Dieses Dokument beinhaltet die Probenahme während Zeiträumen, die von wenigen Wochen bis zu einem Jahr variieren. Dieses Dokument ist nicht anwendbar auf Messsysteme mit einer maximalen Dauer der Pro-benahme von weniger als einer Woche.
Das hier beschriebene Messverfahren ist anwendbar für Luftproben mit einer potenziellen Alpha-Energiekon-zentration der kurzlebigen 222Rn-Folgeprodukte von über 10 nJ m–3 und unter 1 000 nJ m–3.
ANMERKUNG Zur Information behandelt dieses Dokument auch den Fall von 220Rn-Folgeprodukten und zeigt die Ähnlichkeit im Verhalten der Radonisotope 222 und 220.
Mesurage de la radioactivité dans l'environnement - Air: radon 222 - Partie 2: Méthode de mesure intégrée pour la détermination de l'énergie alpha potentielle volumique moyenne de ses descendants à vie courte (ISO 11665-2:2019)
Le présent document décrit les méthodes de mesure intégrée pour les descendants à vie courte du radon 222[4]. Elle donne des indications pour mesurer l'énergie alpha potentielle volumique moyenne des descendants à vie courte du radon 222 dans l'air et sur les conditions d'utilisation des dispositifs de mesure.
Le présent document concerne des échantillons prélevés sur des périodes allant de quelques semaines à un an. Le présent document ne s'applique pas aux systèmes dont la durée de prélèvement maximale est inférieure à une semaine.
La méthode de mesure décrite s'applique aux échantillons d'air ayant une énergie alpha potentielle volumique des descendants à vie courte du radon 222 supérieure à 10 nJ/m3 et inférieure 1 000 nJ/m3.
NOTE À titre informatif uniquement, le présent document traite également le cas des descendants du radon 220 en raison de la similitude de comportement des isotopes 222 et 220 du radon.
Merjenje radioaktivnosti v okolju - Zrak: radon Rn-222 - 2. del: Integrirana merilna metoda za ugotavljanje povprečne potencialne koncentracije alfa energije njegovih kratkoživih razpadnih produktov (ISO 11665-2:2019)
Ta dokument opisuje integrirane merilne metode za kratkožive razpadne produkte radona-222[4]. Podaja navedbe za merjenje povprečne potencialne koncentracije alfa energije kratkoživih razpadnih produktov radona-222 v zraku in pogoje uporabe za merilne naprave. Ta dokument obravnava vzorce, odvzete v obdobjih vse od nekaj tednov do enega leta. Ta dokument se ne uporablja za sisteme z najdaljšim obdobjem vzorčenja manj kot en teden. Opisana merilna metoda se uporablja za vzorce zraka s potencialno koncentracijo alfa energije kratkoživih razpadni produktov radona-222, ki so večji od 10 nJ/m3 in manjši od 1000 nJ/m3.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2020
Nadomešča:
SIST EN ISO 11665-2:2015
Merjenje radioaktivnosti v okolju - Zrak: radon Rn-222 - 2. del: Integrirana merilna
metoda za ugotavljanje povprečne potencialne koncentracije alfa energije
njegovih kratkoživih razpadnih produktov (ISO 11665-2:2019)
Measurement of radioactivity in the environment - Air: radon-222 - Part 2: Integrated
measurement method for determining average potential alpha energy concentration of its
short-lived decay products (ISO 11665-2:2019)
Ermittlung der Radioaktivität in der Umwelt - Luft: Radon-222 - Teil 2: Integrierendes
Messverfahren für die Bestimmung des Durchschnittswertes der potenziellen Alpha-
Energiekonzentration der kurzlebigen Radon-Folgeprodukte (ISO 11665-2:2019)
Mesurage de la radioactivité dans l'environnement - Air: radon 222 - Partie 2: Méthode
de mesure intégrée pour la détermination de l'énergie alpha potentielle volumique
moyenne de ses descendants à vie courte (ISO 11665-2:2019)
Ta slovenski standard je istoveten z: EN ISO 11665-2:2019
ICS:
13.040.99 Drugi standardi v zvezi s Other standards related to air
kakovostjo zraka quality
17.240 Merjenje sevanja Radiation measurements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 11665-2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 13.040.01; 17.240 Supersedes EN ISO 11665-2:2015
English Version
Measurement of radioactivity in the environment - Air:
radon-222 - Part 2: Integrated measurement method for
determining average potential alpha energy concentration
of its short-lived decay products (ISO 11665-2:2019)
Mesurage de la radioactivité dans l'environnement - Ermittlung der Radioaktivität in der Umwelt - Luft:
Air: radon 222 - Partie 2: Méthode de mesure intégrée Radon-222 - Teil 2: Integrierendes Messverfahren für
pour la détermination de l'énergie alpha potentielle die Bestimmung des Durchschnittswertes der
volumique moyenne de ses descendants à vie courte potenziellen Alpha-Energiekonzentration der
(ISO 11665-2:2019) kurzlebigen Radon-Folgeprodukte (ISO 11665-
2:2019)
This European Standard was approved by CEN on 6 September 2019.
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 obtained on application to the CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11665-2:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 11665-2:2019) has been prepared by Technical Committee ISO/TC 85 "Nuclear
energy, nuclear technologies, and radiological protection" in collaboration with Technical Committee
CEN/TC 430 “Nuclear energy, nuclear technologies, and radiological protection” the secretariat of
which is held by AFNOR.
This European 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 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11665-2:2015.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 11665-2:2019 has been approved by CEN as EN ISO 11665-2:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 11665-2
Second edition
2019-09
Measurement of radioactivity in the
environment — Air: radon-222 —
Part 2:
Integrated measurement method for
determining average potential alpha
energy concentration of its short-lived
decay products
Mesurage de la radioactivité dans l'environnement — Air: radon 222 —
Partie 2: Méthode de mesure intégrée pour la détermination de
l'énergie alpha potentielle volumique moyenne de ses descendants à
vie courte
Reference number
ISO 11665-2:2019(E)
©
ISO 2019
ISO 11665-2:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
ISO 11665-2:2019(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 . 1
3.2 Symbols . 2
4 Principle . 3
5 Equipment . 3
5.1 General . 3
5.2 Measuring device . 3
5.2.1 Sampling system . 3
5.2.2 Detection system. 3
5.3 Counting system . 4
6 Sampling . 4
6.1 Sampling objective . 4
6.2 Sampling characteristics . . 4
6.3 Sampling conditions . 5
6.3.1 General. 5
6.3.2 Installation of sampling system . 5
6.3.3 Sampling duration . 5
6.3.4 Volume of air sampled . . . 5
7 Detection method . 6
8 Measurement . 6
8.1 Procedure . 6
8.2 Influence quantities . 6
8.3 Calibration . 7
9 Expression of results . 7
9.1 Average potential alpha energy concentration . 7
9.2 Standard uncertainty . 8
9.3 Decision threshold and detection limit . 9
9.4 Limits of the confidence interval . 9
10 Test report . 9
Annex A (informative) Example of a method meeting the requirements of this document .11
Bibliography .13
ISO 11665-2:2019(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
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 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
patent rights. ISO shall not be 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 information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 the following
URL: 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 11665-2:2012), of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— update of the Introduction;
— update of the Bibliography.
A list of all the parts in the ISO 11665 series can be found on the ISO website.
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 2019 – All rights reserved
ISO 11665-2:2019(E)
Introduction
Radon isotopes 222, 219 and 220 are radioactive gases produced by the disintegration of radium
isotopes 226, 223 and 224, which are decay products of uranium-238, uranium-235 and thorium-232
respectively, and are all found in the earth's crust (see Annex A for further information). Solid elements,
[1]
also radioactive, followed by stable lead are produced by radon disintegration .
When disintegrating, radon emits alpha particles and generates solid decay products, which are also
radioactive (polonium, bismuth, lead, etc.). The potential effects on human health of radon lie in its solid
decay products rather than the gas itself. Whether or not they are attached to atmospheric aerosols,
radon decay products can be inhaled and deposited in the bronchopulmonary tree to varying depths
[2][3][4][5]
according to their size
.
[6]
Radon is today considered to be the main source of human exposure to natural radiation. UNSCEAR
suggests that, at the worldwide level, radon accounts for around 52 % of global average exposure
to natural radiation. The radiological impact of isotope 222 (48 %) is far more significant than
isotope 220 (4 %), while isotope 219 is considered negligible (see Annex A). For this reason, references
to radon in this document refer only to radon-222.
Radon activity concentration can vary from one to more orders of magnitude over time and space.
Exposure to radon and its decay products varies tremendously from one area to another, as it depends
on the amount of radon emitted by the soil and building materials, weather conditions, and on the
degree of containment in the areas where individuals are exposed.
As radon tends to concentrate in enclosed spaces like houses, the main part of the population exposure
is due to indoor radon. Soil gas is recognized as the most important source of residential radon through
infiltration pathways. Other sources are described in other parts of ISO 11665 and ISO 13164 series for
[58].
water
Radon enters into buildings via diffusion mechanism caused by the all-time existing difference between
radon activity concentrations in the underlying soil and inside the building, and via convection
mechanism inconstantly generated by a difference in pressure between the air in the building and the
air contained in the underlying soil. Indoor radon activity concentration depends on radon activity
concentration in the underlying soil, the building structure, the equipment (chimney, ventilation
systems, among others), the environmental parameters of the building (temperature, pressure, etc.)
and the occupants’ lifestyle.
−3
To limit the risk to individuals, a national reference level of 100 Bq·m is recommended by the World
[5] -3
Health Organization . Wherever this is not possible, this reference level should not exceed 300 Bq·m .
This recommendation was endorsed by the European Community Member States that shall establish
national reference levels for indoor radon activity concentrations. The reference levels for the annual
−3[5]
average activity concentration in air shall not be higher than 300 Bq·m .
To reduce the risk to the overall population, building codes should be implemented that require radon
prevention measures in buildings under construction and radon mitigating measures in existing
buildings. Radon measurements are needed because building codes alone cannot guarantee that radon
concentrations are below the reference level.
Variations of a few nanojoules per cubic metre to several thousand nanojoules per cubic metre are
observed in the potential alpha energy concentration of short-lived radon decay products.
The potential alpha energy concentration of short-lived radon-222 decay products in the atmosphere
can be measured by spot and integrated measurement methods (see ISO 11665-1). This document deals
with integrated measurement methods. Integrated measuring methods are applicable in assessing
[4]
human exposure to radiation .
NOTE The origin of radon-222 and its short-lived decay products in the atmospheric environment and other
measurement methods are described generally in ISO 11665-1.
INTERNATIONAL STANDARD ISO 11665-2:2019(E)
Measurement of radioactivity in the environment — Air:
radon-222 —
Part 2:
Integrated measurement method for determining average
potential alpha energy concentration of its short-lived
decay products
1 Scope
[4]
This document describes integrated measurement methods for short-lived radon-222 decay products .
It gives indications for measuring the average potential alpha energy concentration of short-lived
radon-222 decay products in the air and the conditions of use for the measuring devices.
This document covers samples taken over periods varying from a few weeks to one year. This document
is not applicable to systems with a maximum sampling duration of less than one week.
The measurement method described is applicable to air samples with potential alpha energy concentration
3 3
of short-lived radon-222 decay products greater than 10 nJ/m and lower than 1 000 nJ/m .
NOTE For informative purposes only, this document also addresses the case of radon-220 decay products,
given the similarity in behaviour of the radon isotopes 222 and 220.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 11665-1, Measurement of radioactivity in the environment — Air: radon-222 — Part 1: Origins of radon
and its short-lived decay products and associated measurement methods
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
IEC 61577-1, Radiation protection instrumentation — Radon and radon decay product measuring
instruments — Part 1: General principles
IEC 61577-3, Radiation protection instrumentation — Radon and radon decay product measuring
instruments — Part 3: Specific requirements for radon decay product measuring instruments
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11665-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
ISO 11665-2:2019(E)
3.2 Symbols
For the purposes of this document, the symbols given in ISO 11665-1 and the following apply.
a attenuation coefficient relating to the Rn found in the collimators corresponding to the
range P (established theoretically and provided by the manufacturer)
b attenuation coeff
...
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