Radiation protection - Monitoring of workers occupationally exposed to a risk of internal contamination with radioactive material (ISO 20553:2006)

ISO 20553:2006 specifies the minimum requirements for the design of professional programmes to monitor workers exposed to the risk of internal contamination by radioactive substances and establishes principles for the development of compatible goals and requirements for monitoring programmes.

Strahlenschutz - Überwachung von beruflich strahlenexponierten Personen, bei denen ein Risiko der Kontamination mit radioaktiven Stoffen besteht (ISO 20553:2006)

Radioprotection - Surveillance professionnelle des travailleurs exposés à un risque de contamination interne par des matériaux radioactifs (ISO 20553:2006)

L'ISO 20553:2006 décrit les exigences minimales permettant d'établir des programmes de surveillance professionnelle des travailleurs exposés à un risque de contamination interne par des produits radioactifs et établit des principes pour le développement de finalités et d'exigences compatibles avec les programmes de la surveillance.

Radiološka zaščita - Spremljanje stanja delavcev, ki so poklicno izpostavljeni tveganju notranje kontaminacije z radioaktivnim materialom (ISO 20553:2006)

Standard ISO 20553:2006 določa minimalne zahteve za načrtovanje profesionalnih programov za spremljanje stanja delavcev, ki so izpostavljeni tveganju notranje kontaminacije z radioaktivnimi snovmi, ter načela za razvoj združljivih ciljev in zahtev za programe za spremljanje stanja.

General Information

Status
Published
Publication Date
10-Oct-2017
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
11-Oct-2017
Completion Date
11-Oct-2017

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SLOVENSKI STANDARD
SIST EN ISO 20553:2017
01-december-2017
5DGLRORãND]DãþLWD6SUHPOMDQMHVWDQMDGHODYFHYNLVRSRNOLFQRL]SRVWDYOMHQL
WYHJDQMXQRWUDQMHNRQWDPLQDFLMH]UDGLRDNWLYQLPPDWHULDORP ,62

Radiation protection - Monitoring of workers occupationally exposed to a risk of internal

contamination with radioactive material (ISO 20553:2006)

Radioprotection - Surveillance professionnelle des travailleurs exposés à un risque de

contamination interne par des matériaux radioactifs (ISO 20553:2006)
Ta slovenski standard je istoveten z: EN ISO 20553:2017
ICS:
13.100 Varnost pri delu. Industrijska Occupational safety.
higiena Industrial hygiene
13.280 Varstvo pred sevanjem Radiation protection
SIST EN ISO 20553:2017 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 20553:2017
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SIST EN ISO 20553:2017
EN ISO 20553
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 13.280
English Version
Radiation protection - Monitoring of workers
occupationally exposed to a risk of internal contamination
with radioactive material (ISO 20553:2006)
Radioprotection - Surveillance professionnelle des
travailleurs exposés à un risque de contamination
interne par des matériaux radioactifs (ISO
20553:2006)
This European Standard was approved by CEN on 13 September 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20553:2017 E

worldwide for CEN national Members.
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SIST EN ISO 20553:2017
EN ISO 20553:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 20553:2017
EN ISO 20553:2017 (E)
European foreword

The text of ISO 20553:2006 has been prepared by Technical Committee ISO/TC 85 “Nuclear energy,

nuclear technologies, and radiological protection” of the International Organization for Standardization

(ISO) and has been taken over as EN ISO 20553:2017 by 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 2018, and conflicting national standards shall be

withdrawn at the latest by April 2018.

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.

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, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 20553:2006 has been approved by CEN as EN ISO 20553:2017 without any modification.

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SIST EN ISO 20553:2017
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SIST EN ISO 20553:2017
INTERNATIONAL ISO
STANDARD 20553
First edition
2006-04-15
Radiation protection — Monitoring of
workers occupationally exposed to a risk
of internal contamination with radioactive
material
Radioprotection — Surveillance professionnelle des travailleurs
exposés à un risque de contamination interne par des matériaux
radioactifs
Reference number
ISO 20553:2006(E)
ISO 2006
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SIST EN ISO 20553:2017
ISO 20553:2006(E)
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ii © ISO 2006 – All rights reserved
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SIST EN ISO 20553:2017
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Contents Page

Foreword............................................................................................................................................................ iv

Introduction ........................................................................................................................................................ v

1 Scope ..................................................................................................................................................... 1

2 Normative references ........................................................................................................................... 2

3 Terms and definitions........................................................................................................................... 2

3.1 Absorption types .................................................................................................................................. 2

4 Symbols and abbreviated terms ......................................................................................................... 6

5 Purpose and need for monitoring programmes ................................................................................ 6

6 Reference levels.................................................................................................................................... 8

7 Routine monitoring programmes........................................................................................................ 9

7.1 General aspects .................................................................................................................................... 9

7.2 Workplace monitoring........................................................................................................................ 10

7.3 Individual monitoring ......................................................................................................................... 10

7.4 Methods and time intervals ............................................................................................................... 11

8 Special monitoring programmes....................................................................................................... 14

8.1 General aspects .................................................................................................................................. 14

8.2 Workplace monitoring........................................................................................................................ 14

8.3 Individual monitoring ......................................................................................................................... 15

9 Task-related monitoring programmes..............................................................................................17

9.1 General aspects .................................................................................................................................. 17

9.2 Workplace monitoring........................................................................................................................ 17

9.3 Individual monitoring ......................................................................................................................... 17

10 Special cases of individual monitoring ............................................................................................ 18

10.1 Actinides.............................................................................................................................................. 18

10.2 Contamination in wounds.................................................................................................................. 18

10.3 Contamination on the skin................................................................................................................. 18

11 Recording, documentation and reporting........................................................................................ 18

11.1 Recording and documentation.......................................................................................................... 18

11.2 Reporting ............................................................................................................................................. 20

12 Quality management........................................................................................................................... 20

Bibliography ..................................................................................................................................................... 22

© ISO 2006 – All rights reserved iii
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ISO 20553:2006(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

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 20553 was prepared by Technical Committee ISO/TC 85, Nuclear energy, Subcommittee SC 2, Radiation

protection.
iv © ISO 2006 – All rights reserved
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SIST EN ISO 20553:2017
ISO 20553:2006(E)
Introduction

In the course of employment, individuals might work with radioactive materials that, under certain

circumstances, could be taken into the body. Protecting workers against risks of incorporated radionuclides

requires the monitoring of potential intakes and/or the quantification of actual intakes and exposures. The

selection of measures and programmes for this purpose requires decisions concerning methods, techniques,

frequencies etc. for measurements and dose assessment. The criteria permitting the evaluation of the

necessity of such a monitoring programme or for the selection of methods and frequencies of monitoring

usually depend upon the legislation, the purpose of the radiation protection programme, the probabilities of

potential radionuclide intakes, and the characteristics of the materials handled.

This International Standard offers guidance for the decision whether a monitoring programme is required and

how it should be designed. Its intention is to optimise the efforts for such a monitoring programme consistent

with legal requirements and with the purpose of the radiation protection programme. Recommendations of

international expert bodies and international experience with the practical application of these

recommendations in radiation protection programmes have been considered in the development of this

International Standard. Its application facilitates the exchanges of information between authorities, supervisory

institutions and employers. The International Standard is not a substitute for legal requirements.

In the International Standard, the word “shall” is used to denote a requirement and no deviation is allowed.

The word “should” is used to denote a recommendation from which justified deviations are allowed. The word

“may” is used to denote permission.
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SIST EN ISO 20553:2017
INTERNATIONAL STANDARD ISO 20553:2006(E)
Radiation protection — Monitoring of workers occupationally
exposed to a risk of internal contamination with radioactive
material
1 Scope

This International Standard specifies the minimum requirements for the design of professional programmes to

monitor workers exposed to the risk of internal contamination by radioactive substances and establishes

principles for the development of compatible goals and requirements for monitoring programmes.

This International Standard addresses the
a) purposes of monitoring and of monitoring programmes;
b) description of the different categories of monitoring programmes;
c) quantitative criteria for conducting monitoring programmes;
d) suitable methods for monitoring and criteria for their selection;

e) information that has to be collected for the design of a monitoring programme;

f) general requirements for monitoring programmes (e.g. detection limits, tolerated uncertainties);

g) frequencies of measurements;
h) special cases;
i) quality assurance; and
j) documentation, reporting, record-keeping.
This International Standard does not address
⎯ the monitoring of exposure to radon and its radioactive decay products;
⎯ detailed descriptions of measuring methods and techniques;
⎯ detailed procedures for in vivo measurements and in vitro analyses;
⎯ interpretation of monitoring results in terms of doses;

⎯ biokinetic data and mathematical models for converting measured activities into absorbed dose,

equivalent dose and effective dose; or
⎯ the investigation of the causes or implications of an exposure or intake.
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2 Normative references

The following referenced documents are indispensable for the application 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 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results — Part 1: General

principles and definitions

ISO 12790-1:2001, Radiation protection — Performance criteria for radiobioassay — Part 1: General

principles

BIPM/IEC/IFCC/ISO/IUPAC/IUPAP/OIML, International vocabulary of basic and general terms in metrology

(VIM), 1993
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5725-1, ISO 12790-1 and

International vocabulary of basic and general terms in metrology (VIM) and the following apply.

3.1 Absorption types
3.1.1
type F

deposited materials that have high (fast) rates of absorption into body fluids from the respiratory tract

3.1.2
type M

deposited materials that have intermediate (moderate) rates of absorption into body fluids from the respiratory

tract
3.1.1
type S

deposited materials that have low (slow) rates of absorption into body fluids from the respiratory tract

3.2
accuracy of measurement

characteristics of an analysis or determination that ensure that both the bias and precision of the resulting

quantity remains within specified limits
3.3
activity
transition rate
NOTE The activity is stated in becquerels (Bq).
3.4
activity median aerodynamic diameter
AMAD

value of aerodynamic diameter such that 50 % of the airborne activity in a specified aerosol is associated with

particles smaller than the AMAD, and 50 % of the activity is associated with particles larger than the AMAD

NOTE The aerodynamic diameter of an airborne particle is the diameter that a sphere of unit density would need to

have in order to have the same terminal velocity when settling in air as the particle of interest.

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ISO 20553:2006(E)
3.5
clearance

net effect of the biological processes by which radionuclides are removed from the body or from a tissue,

organ or region of the body
NOTE The clearance rate is the rate at which this occurs.
3.6
contamination

activity of radionuclides present on surfaces, or within solids, liquids or gases (including the human body),

where the presence of such radioactive material is unintended or undesirable
3.7
dose
[ICRU Report 60:1998]
3.7.1
annual dose

committed effective dose resulting from all intakes occurring during a calendar year

3.7.2
committed effective dose
time integral of the equivalent-dose rate over an integration period

NOTE In this International Standard, the integration time is 50 years following any intake.

3.7.3
effective dose
sum of the weighted equivalent doses in all tissues and organs of the body

NOTE The effective dose is expressed in units of joules per kilogram (special name: sievert, Sv).

3.7.4
total dose

sum of effective dose from external radiation and committed effective dose from internal radiation

3.8
excretion function

the fraction of an intake excreted per day after a given time has elapsed since the intake occurred

3.9
event

any unintended occurrence, including operating error, equipment failure or other mishap, the consequences or

potential consequences of which are not negligible from the point of view of protection or safety

3.10
intake

activity of a radionuclide taken into the body in a given time period or as a result of a given event

3.11
in vitro analysis

analysis including measurements of radioactivity present in biological samples taken from an individual

NOTE 1 These include urine, faeces and nasal samples. In special monitoring programmes, samples of other materials

such as blood and hair may be taken.
NOTE 2 These analyses are sometimes referred to as indirect measurements.
© ISO 2006 – All rights reserved 3
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ISO 20553:2006(E)
3.12
in vivo measurement

measurement of radioactivity present in the human body, carried out using detectors to measure the radiation

emitted

NOTE 1 Normally the measurement devices are whole-body counters or part-body (e.g. lung, thyroid) counters.

NOTE 2 Sometimes also referred to as direct measurements.
3.13
investigation level

level of dose, exposure or intake (specified by the employer or the regulatory authority) at or above which an

investigation is conducted
NOTE 1 See Clause 6.
3.14
detection limit
smallest actual amount of a measurand that can be detected by a measuring method
NOTE Adapted from ISO 11929-7:2005.
3.15
monitoring

measurement of dose or contamination for the purpose of the assessment or control of exposure to radiation

or radioactive material, and the interpretation of the results
3.15.1 Categories of monitoring programme

NOTE The present International Standard distinguishes four different categories of monitoring programme, namely

routine monitoring programmes (3.15.1.1), special monitoring programmes (3.15.1.2), confirmatory monitoring

programmes (3.15.1.3), and task-related monitoring programmes (3.15.1.4).
3.15.1.1
routine monitoring programme
systematic monitoring programme

monitoring programme associated with continuing operations and intended to demonstrate that working

conditions, including the levels of individual dose, remain satisfactory, and to meet regulatory requirements

3.15.1.2
special monitoring programme

monitoring programme performed to quantify significant exposures following actual or suspected abnormal

events
3.15.1.3
confirmatory monitoring programme

monitoring programme carried out to confirm assumptions about working conditions, for example that

significant intakes have not occurred
3.15.1.4
task-related monitoring programme
specific monitoring programme

monitoring programme related to a specific operation, to provide information on a specific operation of limited

duration, or following major modifications applied to the installations or operating procedures, or to confirm

that the routine monitoring programme is suitable
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3.15.2 Types of monitoring

NOTE This International Standard distinguishes two different types of monitoring in each category of monitoring,

individual monitoring (3.15.2.2) and workplace monitoring (3.15.2.3). A further type of monitoring, collective

monitoring (3.15.2.1), is regarded as a particular form of workplace monitoring.
3.15.2.1
collective monitoring

monitoring applied to representative members of a group of workers whose working conditions are not

significantly different in terms of the risk of intakes
3.15.2.2
individual monitoring

monitoring by means of equipment worn by individual workers, or measurement of the quantities of radioactive

materials in or on the bodies of individual workers, or measurement of radioactive material excreted by

individual workers
3.15.2.3
workplace monitoring
monitoring using measurements made in the working environment
3.16
monitoring interval
period between two times of measurement
3.17
quality assurance

planned and systematic actions necessary to provide adequate confidence that a process, measurement or

service will satisfy given requirements for quality, for example, those specified in a licence

3.18
quality control

part of quality assurance intended to verify that systems and components correspond to predetermined

requirements
3.19
quality management

all activities of the overall management function that determine the quality policy, objectives and

responsibilities, and implement them by means such as quality planning, quality control, quality assurance and

quality improvement within the quality system
3.20
recording level

level of dose, exposure or intake (specified by the employer or the regulatory authority) at or above which

values of dose, exposure or intake received by workers are to be entered in their individual exposure records

NOTE See Clause 6 for the reference levels.
3.21
reference level
investigation level or recording level
3.22
retention function

fraction of an intake present in the body or in a tissue, organ or region of the body after a given time has

elapsed since the intake occurred
© ISO 2006 – All rights reserved 5
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ISO 20553:2006(E)
3.23
time of measurement

in the case of in vitro analysis, the time at which the biological sample (e.g. urine, faeces) was taken from the

individual concerned. In the case of in vivo measurements, the time at which the in vivo measurement begins.

4 Symbols and abbreviated terms
AMAD Activity median aerodynamic diameter
A Mathematical symbol for the detection limit, used in equations
DL Detection limit

e(50) Dose coefficient: committed effective dose accumulated within 50 years following a unit intake

E(t) Value of the excretion function at time, t, (in days) after a unit intake
f Gastro-intestinal uptake fraction
IAEA International Atomic Energy Agency
ICRP International Commission on Radiological Protection
QA Quality assurance
QC Quality control
QM Quality management
R(t) Value of the retention function at time, t, (in days) after a unit intake
RPE Respiratory protective equipment

∆T Time interval (in days) between two measurements in a routine monitoring programme

5 Purpose and need for monitoring programmes

The purpose of monitoring, in general, is to verify and document that the worker is protected adequately

against risks from radionuclide intakes and the protection complies with legal requirements. Therefore, it forms

part of the overall radiation protection programme, which starts with an assessment to identify work situations

in which there is a risk of radionuclide intake by workers, and to quantify the likely intake of radioactive

material and the resulting committed effective dose received. Decisions about the need for monitoring and the

design of the monitoring programme should be made in the light of such a risk assessment.

Routine monitoring programmes are performed to quantify exposures where there is the possibility either of

undetected accidental intakes or of chronic intakes. The basis for routine monitoring programmes is the

assumption that working conditions, and thus risks of intake, remain reasonably constant. The design of such

a programme of regular measurements strongly depends on the level of the annual dose the quantification of

which is ensured. This level should be well below legally relevant limits; its definition should take into account

uncertainties, for example in activity measurement and dose assessment. If this level is too high, intakes

representing considerable fractions of dose limits could be overlooked, whilst a low value can cause the

expenditure of unnecessary efforts at low exposures.

Special monitoring programmes are performed to quantify significant exposures following actual or suspected

abnormal events. Therefore, in comparison to routine monitoring programmes, the time of intake is usually

much better known and additional information can be available, which helps to reduce the uncertainty of

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ISO 20553:2006(E)

assessment. The purposes of dose assessment in such cases include assisting in decisions about

countermeasures (e.g. decorporation therapy), compliance with legal regulations and aiding decisions for the

improvement of conditions at the workplace. In most cases, special monitoring programmes are performed

individually. In cases where there is reason to suspect that exposure limits could be exceeded, it can be

appropriate to extend the measurements in order to derive individual retention and excretion functions and

biokinetic model parameters.

Confirmatory monitoring programmes can be required to check the assumptions about exposure conditions

underlying the procedures selected, e.g. the effectiveness of protection measures. It may consist of workplace

or individual monitoring, e.g. as occasional measurements to investigate the potential accumulation of activity

in the body.

Task-related monitoring programmes apply to a specific operation. The purpose and the dose criteria for

carrying out task-related mon
...

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