Radiological protection - Procedures for monitoring the dose to the lens of the eye, the skin and the extremities (ISO 15382:2015)

ISO 15382:2015 provides procedures for monitoring the dose to the skin, the extremities, and the lens of the eye. It gives guidance on how to decide if such dosemeters are needed and to ensure that individual monitoring is appropriate to the nature of the exposure, taking practical considerations into account. National regulations, if they exist, provide requirements that need to be followed.
ISO 15382:2015 specifies procedures for individual monitoring of radiation exposure of the skin, extremities (hands, fingers, wrists, forearms, feet and ankles), and lens of the eye in planned exposure situations. It covers practices which involve a risk of exposure to photons in the range of 8 keV to 10 MeV and electrons and positrons in the range of 60 keV to 10 MeV.
ISO 15382:2015 gives guidance for the design of a monitoring program to ensure compliance with legal individual dose limits. It refers to the appropriate operational dose quantities, and it gives guidance on the type and frequency of individual monitoring and the type and positioning of the dosemeter. Finally, different approaches to assess and analyse skin, extremity, and lens of the eye doses are given.
It is not in the scope of this International Standard to consider exposure due to alpha or neutron radiation fields.

Strahlenschutz - Verfahren für die Überwachung der Dosis von Augenlinse, Haut und Extremitäten (ISO 15382:2015)

Radioprotection - Procédures pour la surveillance des doses au cristallin, à la peau et aux extrémités (ISO 15382:2015)

ISO 15382:2015 fournit des procédures de surveillance des doses à la peau, aux extrémités et au cristallin. Elle fournit des recommandations pour déterminer si des dosimètres sont nécessaires et s'assurer que la surveillance individuelle est adaptée à la nature de l'exposition, en prenant en compte les aspects pratiques. Lorsque des réglementations nationales existent, elles stipulent des exigences qui doivent également être respectées.
ISO 15382:2015 spécifie des procédures de surveillance individuelle de l'exposition aux rayonnements de la peau, des extrémités (mains, doigts, poignets, avant-bras, pieds et chevilles) et du cristallin dans les situations d'exposition planifiées. Elle concerne les pratiques impliquant un risque d'exposition à des photons dont l'énergie est comprise entre 8 keV et 10 MeV et à des électrons et positrons dont l'énergie est comprise entre 60 keV et 10 MeV.
ISO 15382:2015 fournit des lignes directrices pour la conception d'un programme de surveillance permettant de s'assurer du respect des limites légales de dose individuelle. Elle se rapporte aux grandeurs dosimétriques opérationnelles appropriées et fournit des recommandations sur le type et la fréquence de surveillance individuelle ainsi que sur le type et l'emplacement du dosimètre. Elle décrit enfin différentes méthodes permettant d'évaluer et d'analyser les doses à la peau, aux extrémités et au cristallin.
L'exposition due à des champs de rayonnements alpha ou neutroniques ne relève pas du domaine d'application de la présente Norme internationale.

Radiološka zaščita - Postopki za nadzorovanje doze za očesne leče, kožo in okončine (ISO 15382:2015)

Standard ISO 15382:2015 podaja postopke za nadzorovanje doze za kožo, okončine in očesne leče. Podaja smernice glede odločanja, ali so taki dozimetri potrebni, in zagotavlja, da je nadzorovanje posameznika primerno glede na naravo izpostavljenosti, pri čemer upošteva praktične vidike. Nacionalni predpisi, če obstajajo, podajajo zahteve, ki jih je treba upoštevati.
Standard ISO 15382:2015 določa postopke za nadzor izpostavljenosti kože, okončin (rok, prstov, zapestij, podlakti, stopal in gležnjev) ter očesnih leč posameznika v načrtovanih pogojih izpostavljenosti. Zajema prakse, ki vključujejo tveganje za izpostavljenost fotonom v razponu od 8 keV do 10 MeV ter elektronom in pozitronom v razponu od 60 keV do 10 MeV.
Standard ISO 15382:2015 podaja smernice za načrtovanje nadzornih programov za zagotavljanje skladnosti s pravnimi omejitvami glede doz za posameznika. Sklicuje se na ustrezne operativne količine doze in podaja smernice glede vrste in pogostosti nadzora posameznika ter vrste in postavitve dozimetra. Podani so tudi različni pristopi za ocenjevanje in analizo doz za kožo, okončine ter leče očesa.
Izpostavljenost poljem alfa in nevtronskega sevanja ne spada na področje uporabe tega mednarodnega standarda.

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 15382:2017
01-december-2017
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Radiological protection - Procedures for monitoring the dose to the lens of the eye, the

skin and the extremities (ISO 15382:2015)

Strahlenschutz - Verfahren für die Überwachung der Dosis von Augenlinse, Haut und

Extremitäten (ISO 15382:2015)

Radioprotection - Procédures pour la surveillance des doses au cristallin, à la peau et

aux extrémités (ISO 15382:2015)
Ta slovenski standard je istoveten z: EN ISO 15382:2017
ICS:
13.280 Varstvo pred sevanjem Radiation protection
SIST EN ISO 15382:2017 en,fr,de

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

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SIST EN ISO 15382:2017
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SIST EN ISO 15382:2017
EN ISO 15382
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 13.280
English Version
Radiological protection - Procedures for monitoring the
dose to the lens of the eye, the skin and the extremities
(ISO 15382:2015)

Radioprotection - Procédures pour la surveillance des Strahlenschutz - Verfahren für die Überwachung der

doses au cristallin, à la peau et aux extrémités (ISO Dosis von Augenlinse, Haut und Extremitäten (ISO

15382:2015) 15382:2015)
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 15382:2017 E

worldwide for CEN national Members.
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SIST EN ISO 15382:2017
EN ISO 15382:2017 (E)
Contents Page

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

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SIST EN ISO 15382:2017
EN ISO 15382:2017 (E)
European foreword

The text of ISO 15382:2015 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 15382:2017 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 15382:2015 has been approved by CEN as EN ISO 15382:2017 without any modification.

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SIST EN ISO 15382:2017
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SIST EN ISO 15382:2017
INTERNATIONAL ISO
STANDARD 15382
Second edition
2015-12-01
Radiological protection — Procedures
for monitoring the dose to the lens of
the eye, the skin and the extremities
Radioprotection — Procédures pour la surveillance des doses au
cristallin, à la peau et aux extrémités
Reference number
ISO 15382:2015(E)
ISO 2015
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SIST EN ISO 15382:2017
ISO 15382:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

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 from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
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SIST EN ISO 15382:2017
ISO 15382:2015(E)
Contents Page

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

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

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

2 Normative references ...................................................................................................................................................................................... 1

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

4 Individual monitoring ..................................................................................................................................................................................... 2

4.1 Quantities .................................................................................................................................................................................................... 2

4.2 Dose limits and monitoring levels .......................................................................................................................................... 2

4.3 Monitoring period ................................................................................................................................................................................ 3

4.4 Extremity, skin and lens of the eye monitoring .......................................................................................................... 3

4.5 Uncertainties ............................................................................................................................................................................................ 3

4.6 Characteristics of radiation fields ........................................................................................................................................... 4

5 Assessment of dose levels prior to routine monitoring ............................................................................................... 4

5.1 General ........................................................................................................................................................................................................... 4

5.2 Indications from workplace measurements .................................................................................................................. 4

5.3 Indications from whole body dosimetry .......................................................................................................................... 5

5.4 Indications from literature data ............................................................................................................................................... 5

5.5 Indications from simulations ...................................................................................................................................................... 5

5.6 Indications from confirmatory measurements ........................................................................................................... 5

6 Personal dosimetry............................................................................................................................................................................................ 6

6.1 Extremity and skin dosimetry ................................................................................................................................................... 6

6.1.1 Locations to monitor .................................................................................................................................................... 6

6.1.2 Types of dosemeters ..................................................................................................................................................... 6

6.1.3 Technical specifications of dosemeters ........................................................................................................ 7

6.1.4 Application of correction factors ....................................................................................................................... 7

6.2 Monitoring of the lens of the eye ............................................................................................................................................. 7

6.2.1 Locations to monitor .................................................................................................................................................... 7

6.2.2 Types of dosemeters ..................................................................................................................................................... 8

6.2.3 Technical specifications of dosemeters ........................................................................................................ 8

6.2.4 Application of correction factors ....................................................................................................................... 8

7 Interpretation and management of the results .................................................................................................................... 9

7.1 Analyses of results ............................................................................................................................................................................... 9

7.2 Optimization ............................................................................................................................................................................................. 9

7.3 Registration and documentation ............................................................................................................................................. 9

8 Special cases .............................................................................................................................................................................................................. 9

8.1 Contamination ......................................................................................................................................................................................... 9

8.1.1 General...................................................................................................................................................................................... 9

8.1.2 Estimation of dose to the skin or the lens of the eye from contamination .................10

8.1.3 Estimation of dose to the skin or to the eye lens from hot particles ................................10

8.1.4 Estimation of dose to the skin or to the lens of the eye from contamination

on protective clothing ...............................................................................................................................................11

8.2 Estimation of dose from exposure to radioactivity in the air ......................................................................11

8.3 Need to correct estimated doses due to contamination of dosemeters .............................................11

Annex A (normative) Technical specifications of dosemeters ................................................................................................13

Annex B (informative) Monitoring the dose to the lens of the eye .....................................................................................14

Annex C (informative) Special considerations in the medical sector ..............................................................................18

Annex D (informative) Special considerations in nuclear power plants......................................................................21

Bibliography .............................................................................................................................................................................................................................25

© ISO 2015 – All rights reserved iii
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SIST EN ISO 15382:2017
ISO 15382:2015(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 meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is 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 15382:2002), which has been technically

revised. The main changes are the addition of procedures for monitoring the dose to the lens of the eye.

iv © ISO 2015 – All rights reserved
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SIST EN ISO 15382:2017
ISO 15382:2015(E)
Introduction

The human body has to be protected from effects of ionizing radiation. The stochastic effects are

covered by the limit on the effective dose while tissue reactions (deterministic effects) are covered

by the dose limits for specific organs. The human skin has to be protected from tissue reactions, like

erythema and ulceration. For the lens of the eye, there is the risk of radiation induced opacities and

cataract at elevated exposures. To protect the skin of the whole body, the extremities, and the lens

of the eye, separate dose limits are recommended by the International Commission on Radiological

Protection (ICRP). These separate dose limits are needed because, in case of localized exposures, the

organ doses to the skin and the lens of the eye could exceed these limits even if the effective doses were

lower than the limit.

Specific dosimetry is needed to monitor these doses and to assess compliance with applicable limits.

There are some situations where the correct assessment of the exposure of the skin, extremities, and

lens of the eye can be important. In the nuclear sector, there can be exposure due to weakly penetrating

radiation caused by unshielded open radioactive sources, or by work in glove boxes. These types of

exposure can occur, in particular, in connection with contamination. Exposure to weakly penetrating

radiation from radioactive noble gases in room air also has to be considered. In the medical field, doses

to extremities and doses to the lens of the eye can be important during interventional procedures and

in nuclear medicine.

Monitoring the extremities and the lens of the eye is not always straightforward, and many practical

problems arise for the application of monitoring in the workplace. As a result, monitoring is often not

done as it should be, or not done at all. This International Standard provides guidance on how and when

this monitoring should be done, for all the different types of workplace fields.

This International Standard is directed to all who are involved in the dosimetry of the skin, extremities,

and the lens of the eye, like for example, radiation protection officers, regulators, workers, dosimetry

services, etc.
© ISO 2015 – All rights reserved v
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SIST EN ISO 15382:2017
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SIST EN ISO 15382:2017
INTERNATIONAL STANDARD ISO 15382:2015(E)
Radiological protection — Procedures for monitoring the
dose to the lens of the eye, the skin and the extremities
1 Scope

This International Standard provides procedures for monitoring the dose to the skin, the extremities,

and the lens of the eye. It gives guidance on how to decide if such dosemeters are needed and to ensure

that individual monitoring is appropriate to the nature of the exposure, taking practical considerations

into account. National regulations, if they exist, provide requirements that need to be followed.

This International Standard specifies procedures for individual monitoring of radiation exposure of

the skin, extremities (hands, fingers, wrists, forearms, feet and ankles), and lens of the eye in planned

exposure situations. It covers practices which involve a risk of exposure to photons in the range of

8 keV to 10 MeV and electrons and positrons in the range of 60 keV to 10 MeV.

This International Standard gives guidance for the design of a monitoring program to ensure

compliance with legal individual dose limits. It refers to the appropriate operational dose quantities,

and it gives guidance on the type and frequency of individual monitoring and the type and positioning

of the dosemeter. Finally, different approaches to assess and analyse skin, extremity, and lens of the eye

doses are given.

It is not in the scope of this International Standard to consider exposure due to alpha or neutron

radiation fields.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO/TS 18090-1, Radiological protection — Characteristics of reference pulsed radiation — Part 1:

Photon radiation.

IEC 62387, Radiation protection instrumentation — Passive integrating dosimetry systems for personal

and environmental monitoring of photon and beta radiation

IEC 60846-1, Radiation protection instrumentation — Ambient and/or directional dose equivalent (rate)

meters and/or monitors for beta, X and gamma radiation — Part 1: Portable workplace and environmental

meters and monitors

IEC 61526, Radiation protection instrumentation — Measurement of personal dose equivalents Hp(10) and

Hp(0,07) for X, gamma, neutron and beta radiations — Direct reading personal dose equivalent meters

ICRP, 2007. The 2007 Recommendations of the International Commission on Radiological Protection,

ICRP Publication 103. Ann. ICRP 37 (2-4)

ICRP, 2010. Conversion Coefficients for Radiological Protection Quantities for External Radiation

Exposures, ICRP Publication 116, Ann. ICRP 40(2–5), 2010

ICRP, 2012. ICRP Statement on Tissue Reactions / Early and Late Effects of Radiation in Normal Tissues

and Organs – Threshold Doses for Tissue Reactions in a Radiation Protection Context, ICRP Publication

118. Ann. ICRP 41(1/2)

ICRU, 2011. Fundamental Quantities and Units for Ionizing Radiation, ICRU Publication 85. J. ICRU 11(1)

© ISO 2015 – All rights reserved 1
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SIST EN ISO 15382:2017
ISO 15382:2015(E)
3 Terms and definitions

For the purposes of this document, the terms, definitions and units given in ICRP 103, ICRP 116,

ICRP 118 and ICRU 85 apply.
4 Individual monitoring
4.1 Quantities

Skin and extremity monitoring involves the measurement of H (0,07), the estimator of the equivalent

dose to the skin.

Lens of the eye monitoring involves the measurement of H (3), the estimator of the equivalent dose to

the lens of the eye. If the radiation field is well known, H (3) can be estimated by the use of dosemeters

type tested and calibrated in terms of other quantities, i.e. H (0,07) and H (10), as in many cases they

p p

can provide an adequate estimate of the dose to the lens of the eye (depending on the radiation field).

Technical specifications of dosemeters are provided in Annex A. Guidance on which type of dosemeter

can be used for the lens of the eye (depending on the radiation field) is provided in Annex B.

4.2 Dose limits and monitoring levels

The dose limits for skin, extremities, and lens of the eye for planned exposure situations are given in

national regulations.

ICRP has given more recent recommendations on the dose limits (ICRP 103 and ICRP 118) to avoid

tissue reactions. Requirements equivalent to these recommendations are given by the IAEA in the Basic

[1]

Safety Standards (BSS). These recommendations from ICRP and IAEA constitute the basis for the

recommendations in this International Standard.
The ICRP recommended dose limits are the following:

a) an equivalent dose limit to the extremities (hands and feet) or the skin of 500 mSv in a year. The

equivalent dose limits for the skin apply to the average dose over 1 cm of the most highly irradiated

area of the skin. In practice, an estimate of equivalent dose to the skin is a conservative estimate of

equivalent dose to the extremities;

b) an equivalent dose limit to the lens of the eye of 20 mSv per year averaged over 5 consecutive years

(100 mSv in 5 years) and of 50 mSv in any single year.

Individual monitoring is required to verify compliance with dose limits as they are described in the

national legislation. Extremity, skin, and lens of the eye monitoring should be undertaken for workers

who have a reasonable probability of receiving per year an equivalent dose higher than 3/10th of one of

the above mentioned yearly limits. National regulations can require monitoring from different values,

in that case they replace the following values.
The following monitoring levels are recommended:

a) for the extremities or the skin, this means monitoring should be undertaken if there is a reasonable

probability to receive a dose greater than 150 mSv per year;

b) for the lens of the eye, monitoring should be undertaken if there is a reasonable probability to receive

a dose in a single year greater than 15 mSv or in consecutive years greater than 6 mSv per year.

For dose levels expected to be lower than the recommended monitoring levels given above, a survey

demonstrating that the levels are not exceeded, should be sufficient.

The expected annual dose can be estimated via one or more of the methods given in Clause 5.

2 © ISO 2015 – All rights reserved
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SIST EN ISO 15382:2017
ISO 15382:2015(E)
4.3 Monitoring period

The choice of the length of the monitoring period is related to the levels of the expected doses and to the

relevant dose limit.

For doses above the monitoring level, a monitoring period of one month is recommended. For workers

whose doses are likely to stay below the monitoring level, providing monitoring can be considered. The

monitoring period in the latter case can be longer, e.g. three months. Shorter monitoring periods can be

chosen (weekly monitoring or even monitoring per procedure), when setting up new procedures, when

optimizing working conditions or when there is a risk of potential high exposure.

Regulatory bodies and/or expert committees also can provide appropriate recommendations for

monitoring periods.
4.4 Extremity, skin and lens of the eye monitoring

The dose to the extremities, skin, and the lens of the eye needs to be monitored in situations with

non-homogeneous exposure conditions for which the whole-body monitoring does not provide an

adequate estimate of the dose to the skin, the dose to the extremities, or the dose to the lens of the eye.

Exposures can be significant when weakly penetrating radiation such as low energy photons or beta

radiation is present.

Hand or finger monitoring shall be considered for workplaces where extremities are particularly close

to the radiation emitter or radiation beam, such as situations where radioactive sources are handled

in, for example, research, nuclear medicine, and dismantling applications. Other important examples

where extremity monitoring can be necessary are interventional radiology and nuclear medicine

workplaces. Skin monitoring shall be considered for workplaces where skin is close to the radiation

emitter or the beam. Also when there is a risk for skin contamination, monitoring should be considered.

Examples of such situations are handling of contaminated components or unsealed radioactive sources.

Monitoring of the lens of the eye shall be specifically considered for workplaces where the eyes are

particularly close to the radiation emitter (which can also be a source of scattered radiation) or the

radiation beam (for example in interventional radiology) while the rest of the body can be protected

by, e.g. a lead apron. Workers exposed in high energy beta fields can receive significant doses to the

lens of the eye.
4.5 Uncertainties

An essential aspect of quality assurance in individual monitoring is assessing the quality of the

measurement results. In the evaluation of the uncertainty, all knowledge of the dosemeter and

evaluating system should be used, possibly in combination with information from the client/customer

such as local exposure and storage conditions. The amount of effort put into the uncertainty should be

realistic in view of its purpose in radiation protection.
[2]

ICRU makes recommendations on the acceptable levels for total uncertainty in Report 47 which

[3]

are broadly consistent with the ICRP recommendation (ICRP 75). ICRU recommends for single

measurements of the operational quantities that “....in most cases, an overall uncertainty of one

standard deviation of 30 % should be acceptable.”

The expanded uncertainty (95 % coverage probability) for values of assessed annual dose values at

or near the dose limit should not exceed 0,67 to 1,5 (factor 1,5) after all corrections have been made

[3]

(ICRP 75). This applies to values of effective dose, equivalent dose to a small area of skin, equivalent

dose to lens of the eye or extremities, summed for all radiation types of the radiation field.

It shall be recognized that different requirements on accuracy may be needed for an estimate of

the equi
...

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