Assessment of the Indoor Rn Contribution of Swiss Building Materials

Schuler, Ch.; Crameri, Reto; Burkart, W.

doi:10.1097/00004032-199103000-00016

Cited by 12 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results obtained for the zirconium oxide and zircon sand samples seem to confirm the fact that it is the use of such materials (almost always in very low concentration) that may be responsible for a higher natural radioactivity content in ceramic building materials. Furthermore, the results obtained are in close agreement with those reported by other authors [19,20] for similar materials.…”

Section: Resultssupporting

confidence: 92%

Proposal for a method of certification of natural radioactivity in building materials

et al. 1997

View full text Add to dashboard Cite

The need for a standardised procedure for the determination of the natural radioactivity content of building materials arises from the growing attention that is paid to its potential effects and the consequent concern of many producers of such materials. Gamma spectrometry has been carried out on samples of several building materials produced in Italy. In particular, reference has been made to the 609 keV peak of and to the 238 keV peak of , to determine the specific activity of members of the and decay chains, respectively. The determination of content has been performed through its 1460 keV peak. Grinding monolithic samples may cause the release of a considerable amount of , thus perturbing the equilibrium within the decay chain, so that the activity of may be representative of that of its parent isotope only after a period of about 30 days. The build-up of and its daughters has been studied both from a theoretical and experimental point of view. The results show that the asymptotic values of specific activity, extrapolated on the basis of theoretical equations, are in accord with experimental values. A fast and reliable certification method may therefore include extrapolation of the final specific activity from values obtained in measurements performed in the first few days after grinding.

show abstract

Section: Resultssupporting

confidence: 92%

Proposal for a method of certification of natural radioactivity in building materials

et al. 1997

View full text Add to dashboard Cite

show abstract

“…Nevertheless, natural radioactivity in building materials has been regulated in several countries (Van der Heijde and Klijn 1985;Swedjemark 1986), in order to limit both the contribution to the external (gamma) and internal (alpha) dose, which may be caused by it (Bruzzi et al 1992). Raw materials and processed building products can very greatly in radionuclide content, reflecting their origin and the geological conditions at the site of their production (Schuler et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Determination of Natural Radionuclides Content in Some Building Materials in Nigeria by Gamma-Ray Spectrometry

Ademola¹

2008

Health Physics

View full text Add to dashboard Cite

This paper presents the findings of a study undertaken to determine the natural radioactivity present in some building materials in Nigeria using a gamma-ray spectrometer with a hyper pure germanium detector. A total of 118 samples of commonly used building materials were collected from manufacturers and suppliers of these materials. The mean radioactivity concentrations measured in the different building materials varied from 9.4 to 62.9, 1.3 to 88.4, and 21.5 to 762.4 Bq kg(-1), respectively, for 226Ra, 232Th, and 40K. The average contents of 226Ra, 232Th, and 40K for all the samples were 36.3, 46.5, and 320.9 Bq kg(-1), respectively, lower than the world average for building materials (50, 50, and 500 Bq kg(-1)). The calculated mean radium equivalent activity and external and internal hazard indices for the entire sample were lower than United Nation Scientific Committee on the Effects of Atomic Radiation recommended limits and comparable with results of similar studies undertaken in other countries. The mean annual gonadal equivalent doses of some of the samples were higher than the world average value for soil.

show abstract

“…Raw material and processed building products can vary greatly in radionuclide content, reflecting their origin and geological conditions at the site of their production (Schuler et al, 1991). The external dose rate in dwelling is also affected, to a lesser extent, by the cosmic radiation and that originating from the underlying soil or rock.…”

Section: Introductionmentioning

confidence: 99%

Radionuclide content of concrete building blocks and radiation dose rates in some dwellings in Ibadan, Nigeria

Ademola

Oguneletu

2005

Journal of Environmental Radioactivity

View full text Add to dashboard Cite

Assessment of the Indoor Rn Contribution of Swiss Building Materials

Cited by 12 publications

References 6 publications

Proposal for a method of certification of natural radioactivity in building materials

Proposal for a method of certification of natural radioactivity in building materials

Determination of Natural Radionuclides Content in Some Building Materials in Nigeria by Gamma-Ray Spectrometry

Radionuclide content of concrete building blocks and radiation dose rates in some dwellings in Ibadan, Nigeria

Contact Info

Product

Resources

About