BSI PD CEN/TR 17113:2017
$189.07
Construction products. Assessment of release of dangerous substances. Radiation from construction products. Dose assessment of emitted gamma radiation
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 50 |
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 9 | 1 Scope 2 Terms and definitions |
| 11 | 3 European Regulatory Framework 3.1 Provisions on radiation protection |
| 12 | 3.2 Provisions on the marketing of construction products under the CPR |
| 13 | 3.3 Radon exhalation from building materials 4 Provisions for dose assessment 4.1 General 4.2 Principle of calculation |
| 14 | 4.3 Room model |
| 15 | 4.4 Basic assumptions 4.4.1 General |
| 16 | 4.4.2 Shielding effect of materials for cosmic radiation 4.4.3 Conversion factor for absorbed dose in air 4.4.4 Occupancy 4.4.5 Activity concentrations for reference concrete in Europe 4.5 Graded approach to dose assessment taking into account density and thickness |
| 19 | 4.6 Assessment of indoor gamma exposure due to building materials and construction products 4.6.1 General |
| 20 | 4.6.2 Composite material |
| 21 | 4.6.3 Dose assessment for concrete coated with a layer of thin material 4.6.4 Roof tiles |
| 22 | 4.6.5 Materials not complying to Formula (3) 4.6.6 Conclusive |
| 23 | Annex A (informative)Calculation of external gamma dose rate A.1 Calculation of gamma dose rate |
| 25 | A.2 Parameters for a simple computer program |
| 27 | Annex B (informative)Examples of dose assessment using Table 2 B.1 Example 1: Exposure to gamma radiation in a concrete room where the 226Ra and 232Th concentrations are slightly above average |
| 28 | B.2 Example 2: Exposure to gamma radiation in a room where the walls are made of material with elevated 226Ra and 232Th concentrations and the floor and ceiling of typical concrete |
| 29 | B.3 Example 3: Exposure to gamma radiation in a room with concrete floor and ceiling, and cavity walls with brick and limestone |
| 31 | Annex C (informative)Estimate of indoor gamma dose based on mass per unit area as control parameter |
| 35 | Annex D (informative)Validation of the dose modelling and a density corrected index formula D.1 General D.2 Calculations |
| 40 | D.3 Conclusion |
| 41 | Annex E (informative)Considerations on and justification for choosing an appropriate room size E.1 General |
| 42 | E.2 Chosen dimensions for the model room |
| 43 | E.3 Calculation of values given in Table E.1 E.3.1 Rooms 1a and 1b, with dimensions 12 m × 7 m × 2,8 m E.3.2 Rooms 2a and 2b, with dimensions 3 m × 4 m × 2,5 m |
| 44 | E.4 Specific dose rates from different structures in the EN 16516 model room |
