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Thursday, May 21, 2020 | History

1 edition of Radon transport through and exhalation from building materials found in the catalog.

Radon transport through and exhalation from building materials

Radon transport through and exhalation from building materials

a review and assessment

  • 302 Want to read
  • 23 Currently reading

Published by U.S. Dept. of Commerce, National Bureau of Standards, For sale by the Supt. of Docs., U.S. G.P.O. in Washington, D.C .
Written in English

    Subjects:
  • Indoor air pollution.,
  • Radon.,
  • Building materials -- Permeability.

  • Edition Notes

    StatementR. Collé ... [et al.] ; prepared for the Office of Radiation Programs, U.S. Environmental Protection Agency.
    SeriesNBS technical note ;, 1139
    ContributionsCollé, R., United States. National Bureau of Standards., United States. Environmental Protection Agency. Office of Radiation Programs., Center for Radiation Research., Center for Materials Science (U.S.), Center for Building Technology.
    Classifications
    LC ClassificationsQC100 .U5753 no. 1139, TD885.5.R33 .U5753 no. 1139
    The Physical Object
    Paginationvi, 97 p. :
    Number of Pages97
    ID Numbers
    Open LibraryOL3922009M
    LC Control Number81603388

    Abstract. Indoor air radon concentrations can vary over four orders of magnitude. Why?These ranges occur because of the wide variations in the rate at which radon is generated from its sources (primarily . Calculated Contributions of Building Materials to Radon in the Study Building Radon Source Material Ceiling slab Wall blocks Floor slab Foundation soil Total Radon Flux (pd m-2sr1) * " .

    results indicate that the diffusion coefficient and length of radon gas in building materials are the measure of its permeability through that medium. Keywords: Radon, Permeability, Diffusion, LR detectors . Radioactive radon‐ ( Rn) gas has a half‐life of days, which emanates from rocks and soils and tends to concentrate in enclosed spaces like underground mines or is a major Cited by: 2.

    A practical setup for routine measurement of exhalation rates of radon from building materials 4. Conclusions 3. Results. 1. Introduction. Measurements of radon exhalation rates from soil or/and .   The radon exhalation rate at the low-pressure side increases with an increase in seepage velocity (pressure difference), while the radon exhalation rate at the high-pressure side is on the Author: Yongjun Ye, Yongjun Ye, Wenhao Wu, Chunhua Huang, Kimberlee J. Kearfott.


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Radon transport through and exhalation from building materials Download PDF EPUB FB2

Get this from a library. Radon transport through and exhalation from building materials: a review and assessment. [R Collé; R J Rubin; Lawrence I Knab; J M R Hutchinson; United States. National Bureau. @article{osti_, title = {Radon transport through and exhalation from building materials: a review and assessment.

Interim report}, author = {Colle, R. and Rubin, R.J. and Knab, L.I. and Hutchinson. An experimental set-up has been developed at the Eindhoven University of Technology to measure diffusive and advective transport of radon through building materials.

Advective transport can Cited by: This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. A-Z book list; Amendments and corrections; Book sets; Briefing and procurement guides; Radon transport through and exhalation from building materials - A review and assessment.

Radon transport. A radon transport equation has been established from a preliminary theoretical study of radon migration through porous media such as building materials.

The equation has been applied to the case of. Radon transport in porous materials is strongly influenced by the presence of water. It is also necessary to be able to numerically control the effects of this parameter. The radon concentration Cited by: of building materials also the mean and rounded activity concentration of radium and thorium was declared.

The mean values of the radon exhalation rates for building materials varied. The radon exhalation rates from the building materials varied from ± to ± mBq/kg/h for powder samples, 73 ± 5 to 6, ± mBq/m2/h for structural building materials while. Further workconcerning the problem of diffusion of radon gas through concrete was carried out by Folkerts et al.

They measured the diffusion coefficients of radon through different building File Size: KB. The radon exhalation of building materials 75 dramatically depends on the properties of the material matrix such as the Ra activity concentration, its 76 distribution within the matrix, the.

Download PDF Exhalation book full free. Exhalation available for download and read online in other formats. Radon transport through and exhalation from building materials. Collé — Building. Radon flux - or exhalation - from building materials can be measured either in the laboratory or in a field setting.

If a sample of the building material is easily obtainable, the radon exhalation rate can be. The building materials are the sources of radon gas in the indoor air.

The determination of radon and its progeny was performed by passive detection technique. Fifteenth commonly building construction.

The radon exhalation rate from building materials varies appreciably from one building material to another. This may due to the differences in radium content [ 22] and porosity [ 23].

It is worth Author: Ani Sharma, Ajay Kumar Mahur, R. Sonkawade, A. Sharma, Raj Kumar, Rajendra Prasad. There is considerable public concern about radon exhalation from building materials and the contribution to indoor radon levels. To address this concern, radon exhalation rates were determined for 53 Cited by:   Is There Radon Gas in Building Materials.

Radon gas is naturally created from the decay of radioactive elements, such as uranium, which can be found in different amounts in soil and rock. ), radon exhalation rates and the radium content in building material samples are listed in Table 1.

The radon concentration had high value in sand sample ± Bq/m. and lower in ceramic tile. about the transport of radon through building materials will lead to more effective ways to decrease or to prevent the entrance of radon into dwellings.

Keywords: Radon, exhalation, building materials. Measurement of Radon Exhalation Rate from Building Materials F. Shoqwara, N. Dwaikat, G. Saffarini* Radiation Physics Laboratory, An Najah National University, Nablus, Palestine Abstract Indoor radon.

Radon Exhalation from Industrial Residues as Suitable Additives for Building Materials a limit to radium concentration is set, in particular for. Ra is Bq/kg and for PG pipe scales is × .Radon exhalation from building materials and soil29 Radon in the natural environment Among 27 radon isotopes (from Rn Œ to Rn Œ ) only Rn Œ has significance with respect to contaminating .Radon from building materials – Reducing risk by monitoring at source 1, ød1,en1,1,1,J.S.Rønning1,2,ad1 12th.