CEN/TR 17113:2017
(Main)Construction products - Assessment of release of dangerous substances - Radiation from construction products - Dose assessment of emitted gamma radiation
Construction products - Assessment of release of dangerous substances - Radiation from construction products - Dose assessment of emitted gamma radiation
The aim of this Technical Report is to propose a methodology to determine indoor gamma dose from building materials and to help classify such a product as required in the Construction Products Regulation [7]. This first technical approach could be a precursor for the development of a harmonized European Standard based on this methodology.
NOTE 1 In this Technical Report, doses from radon and thoron exhalation are excluded. However, in 3.3, information is given on how radon exhalation is dealt with in (EU)2013/59/Euratom, the Basic Safety Standards Directive (2013/59/EURATOM) [1].
NOTE 2 Compliance with national exemption levels for NORM nuclides remains.
Bauprodukte - Bewertung der Freisetzung von gefährlichen Stoffen - Radioaktivität von Bauprodukten - Verfahren zur Beurteilung von emittierter Gammastrahlung
Das Ziel dieses Technischen Berichts ist es, eine Methodik zur Bestimmung der Gamma-Dosen durch Baustoffen in Innenräumen aufzustellen und die Klassifizierung solcher Produkte zu unterstützen, wie dies von der Bauproduktenverordnung [7] verlangt wird. Dieser erste technische Ansatz könnte ein Vorläufer für die Entwicklung einer harmonisierten Europäischen Norm, basierend auf dieser Methodik, sein.
ANMERKUNG 1 In diesem Technischen Bericht sind Dosen durch die Exhalation von Radon und Thoron ausgenommen. Allerdings sind in Abschnitt 3.3 Informationen zur Handhabung der Radonexhalation in der Grundnormenrichtlinie 2013/59/Euratom [1] angegeben.
ANMERKUNG 2 Die Konformität mit nationalen Freigrenzen für NORM Nuklide bleibt erhalten.
Produits de construction - Evaluation de l’émission de substances dangereuses - Radioactivité émise par les produits de construction - Evaluation de la dose de radiation gamma émise
Gradbeni proizvodi - Ocenjevanje sproščanja nevarnih snovi - Sevanje gradbenih proizvodov - Ocena odmerka gama sevanja
Cilj tega tehničnega poročila je predlagati metodologijo za določanje doze gama sevanja v zaprtih prostorih iz gradbenih materialov in pomagati razvrstiti takšen proizvod v skladu z zahtevami v Uredbi o gradbenih proizvodih (CPR) [7]. Ta prvi tehnični pristop je lahko znanilec razvoja harmoniziranega evropskega standarda, osnovanega na tej tehnologiji.
OPOMBA 1 V tem tehničnem poročilu so izključene doze izhajanja radona in torona. Vendar pa 3.3 vključuje informacije o tem, kako je izhajanje radona obravnavano v (EU)2013/59/Euratom, direktivi o temeljnih varnostnih standardih (Euratom-BSS) [1].
OPOMBA 2 Gradbeni materiali, omenjeni v tem tehničnem poročilu, so gradbeni proizvodi, ki se uporabljajo za stavbe. Drugi gradbeni proizvodi, ki se uporabljajo za druga gradbena dela (kot je npr. gradbeni inženiring), niso pomembni in v tem tehničnem poročilu niso zajeti.
OPOMBA 3 Skladnost z nacionalnimi ravnmi izvzetja za nuklide NORM se ohrani.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2018
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Construction products - Assessment of release of dangerous substances - Radiation
from construction products - Dose assessment of emitted gamma radiation
Bauprodukte - Bewertung der Freisetzung von gefährlichen Stoffen - Festlegung des
Verfahrens zur Beurteilung der Strahlendosis und Klassifizierung von emittierter
Gammastrahlung
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Ta slovenski standard je istoveten z: CEN/TR 17113:2017
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
13.280 Varstvo pred sevanjem Radiation protection
91.100.01 Gradbeni materiali na Construction materials in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEN/TR 17113
TECHNICAL REPORT
RAPPORT TECHNIQUE
October 2017
TECHNISCHER BERICHT
ICS 91.100.01
English Version
Construction products - Assessment of release of
dangerous substances - Radiation from construction
products - Dose assessment of emitted gamma radiation
Produits de construction - Evaluation de l¿émission de Bauprodukte - Bewertung der Freisetzung von
substances dangereuses ¿ Détermination de gefährlichen Stoffen - Festlegung des Verfahrens zur
l¿estimation dosimétrique et classification en fonction Beurteilung der Strahlendosis und Klassifizierung von
de l¿émission de rayonnement gamma emittierter Gammastrahlung
This Technical Report was approved by CEN on 28 May 2017. It has been drawn up by the Technical Committee CEN/TC 351.
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. CEN/TR 17113:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Terms and definitions . 7
3 European Regulatory Framework . 9
3.1 Provisions on radiation protection . 9
3.2 Provisions on the marketing of construction products under the CPR . 10
3.3 Radon exhalation from building materials . 11
4 Provisions for dose assessment . 11
4.1 General . 11
4.2 Principle of calculation . 11
4.3 Room model . 12
4.4 Basic assumptions. 13
4.4.1 General . 13
4.4.2 Shielding effect of materials for cosmic radiation . 14
4.4.3 Conversion factor for absorbed dose in air . 14
4.4.4 Occupancy . 14
4.4.5 Activity concentrations for reference concrete in Europe . 14
4.5 Graded approach to dose assessment taking into account density and thickness . 14
4.6 Assessment of indoor gamma exposure due to building materials and construction
products . 17
4.6.1 General . 17
4.6.2 Composite material . 18
4.6.3 Dose assessment for concrete coated with a layer of thin material . 19
4.6.4 Roof tiles . 19
4.6.5 Materials not complying to Formula (3) . 20
4.6.6 Conclusive . 20
Annex A (informative) Calculation of external gamma dose rate . 21
A.1 Calculation of gamma dose rate . 21
A.2 Parameters for a simple computer program . 23
Annex B (informative) Examples of dose assessment using Table 2 . 25
B.1 Example 1: Exposure to gamma radiation in a concrete room where the Ra and
Th concentrations are slightly above average . 25
B.2 Example 2: Exposure to gamma radiation in a room where the walls are made of
226 232
material with elevated Ra and Th concentrations and the floor and ceiling of
typical concrete . 26
B.3 Example 3: Exposure to gamma radiation in a room with concrete floor and ceiling,
and cavity walls with brick and limestone . 27
Annex C (informative) Estimate of indoor gamma dose based on mass per unit area as
control parameter . 29
Annex D (informative) Validation of the dose modelling and a density corrected index
formula . 33
D.1 General . 33
D.2 Calculations . 33
D.3 Conclusion . 38
Annex E (informative) Considerations on and justification for choosing an appropriate room
size . 39
E.1 General . 39
E.2 Chosen dimensions for the model room . 40
E.3 Calculation of values given in Table E.1 . 41
E.3.1 Rooms 1a and 1b, with dimensions 12 m × 7 m × 2,8 m . 41
E.3.2 Rooms 2a and 2b, with dimensions 3 m × 4 m × 2,5 m . 41
E.4 Specific dose rates from different structures in the EN 16516 model room . 42
Bibliography . 46
European foreword
This document (CEN/TR 17113:2017) has been prepared by Technical Committee CEN/TC 351
“Construction products: Assessment of release of dangerous substances”, the secretariat of which is
held by NEN.
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 has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
Introduction
The aim of this report is to propose a dose assessment methodology that accounts for factors such as
density or thickness of the material as well as factors relating to the type of construction and the
intended use of the material (bulk or superficial) as required by Annex VIII of the 2013/59/EURATOM
[1]. This approach is specially needed for building materials and construction products with an index
exceeding 1 but that nonetheless may comply with the 1 mSv per year reference level established in the
2013/59/EURATOM [1].
NOTE Although the methodology is centred around the reference level of 1 mSv established in the
2013/59/EURATOM, the methodology is also applicable if a reference value other than 1 mSv per year is selected.
In that case, the selected dose value D and its corresponding index value I is adjusted accordingly.
In 1996, natural radiation sources were already included in the standards established by Euratom as
well as those established by the IAEA [2]. Since then, the European Commission has moved ahead
publishing, on a regular basis, technical support guidance and recommendations on Naturally Occurring
Radioactive Material (NORM) issues. In 1997, for instance, recommendations [3] were published to help
deal with "significant increase in exposure due to natural radiations". In 1999, the European
Commission published radiological protection principles concerning the natural radioactivity of
building materials [4] and reference levels for workplaces processing materials with enhanced levels of
naturally occurring radionuclides [5]. Lastly, in 2001 the European Commission published
recommendations dealing with exemption and clearance levels for NORM residues [6].
These recommendations have provided Member States with criteria and a sound technical framework
to help establish national regulations for NORM and building materials. Some Member States have
already included all or parts of these recommendations in their regulatory framework anticipating the
new EU directive.
Subsequently, the European Commission decided to harmonize, promote and consolidate the main
recommendations, introducing them into a new Council directive (2013/59/Euratom [1]) laying down
basic safety standards for the protection against the danger arising from exposure to ionising radiation.
This BSS directive was officially issued in January 2014. Member States have four years to transpose
and implement this directive and according to the Euratom treaty, these members will before then,
communicate to the Commission their existing and draft provisions. The Commission will then make
appropriate recommendations for harmonizing the provisions amongst member States.
Requirements of this directive (2013/59/EURATOM, [1]) dealing with building materials are hereby
presented. They should be taken into account along with the 2011 EU regulation laying down
harmonized conditions for the marketing of construction products (EU no 305/2011) [7], so called CPR,
containing many relevant articles which complement the aforesaid directive.
Both EU regulatory documents constitute the new basis for building material radiation protection
regulation and should be soon followed by more detailed EU guidance and standards of which this
document (CEN/TR 17113) should be part.
The European Commission (EC) has mandated the CEN to establish EU harmonized standards regarding
dose assessment of emitted g
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