Intercomparison of activity size distribution of thoron progeny and a mixture of radon and thoron progeny

Cheng, Yung Sung; Chen, Tou-Rong; Yeh, Hsu‐Chi; Bigu, J.; Holub, R.; Tu, K.W.; Knutsond, E. O.; Falk, Rolf

doi:10.1016/s0265-931x(00)00045-x

Cited by 20 publications

(8 citation statements)

References 38 publications

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“…This is in agreement with what is measured for indoor and mining environments, where the unattached 212 Pb was found to have particle sizes of approximately 1 nm (Chen et al., 1997). Measurements carried out in a radon test chamber, as part of an intercomparison exercise, also showed median diameters less than 1 nm for unattached 212 Pb (Cheng et al., 2000).…”

Section: Annex a Aerosol Data And Dose Coefficients For Radon Progenymentioning

confidence: 95%

ICRP Publication 137: Occupational Intakes of Radionuclides: Part 3

Paquet¹,

Bailey²,

Leggett³

et al. 2017

Ann ICRP

236

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The 2007 Recommendations of the International Commission on Radiological Protection (ICRP, 2007) introduced changes that affect the calculation of effective dose, and implied a revision of the dose coefficients for internal exposure, published previously in the Publication 30 series (ICRP, 1979, 1980, 1981, 1988) and Publication 68 (ICRP, 1994). In addition, new data are now available that support an update of the radionuclide-specific information given in Publications 54 and 78 (ICRP, 1988a, 1997b) for the design of monitoring programmes and retrospective assessment of occupational internal doses. Provision of new biokinetic models, dose coefficients, monitoring methods, and bioassay data was performed by Committee 2, Task Group 21 on Internal Dosimetry, and Task Group 4 on Dose Calculations. A new series, the Occupational Intakes of Radionuclides (OIR) series, will replace the Publication 30 series and Publications 54, 68, and 78. OIR Part 1 has been issued (ICRP, 2015), and describes the assessment of internal occupational exposure to radionuclides, biokinetic and dosimetric models, methods of individual and workplace monitoring, and general aspects of retrospective dose assessment. OIR Part 2 (ICRP, 2016), this current publication and upcoming publications in the OIR series (Parts 4 and 5) provide data on individual elements and their radioisotopes, including information on chemical forms encountered in the workplace; a list of principal radioisotopes and their physical half-lives and decay modes; the parameter values of the reference biokinetic model; and data on monitoring techniques for the radioisotopes encountered most commonly in workplaces. Reviews of data on inhalation, ingestion, and systemic biokinetics are also provided for most of the elements. Dosimetric data provided in the printed publications of the OIR series include tables of committed effective dose per intake (Sv Bq−1 intake) for inhalation and ingestion, tables of committed effective dose per content (Sv Bq−1 measurement) for inhalation, and graphs of retention and excretion data per Bq intake for inhalation. These data are provided for all absorption types and for the most common isotope(s) of each element. The electronic annex that accompanies the OIR series of publications contains a comprehensive set of committed effective and equivalent dose coefficients, committed effective dose per content functions, and reference bioassay functions. Data are provided for inhalation, ingestion, and direct input to blood. This third publication in the series provides the above data for the following elements: ruthenium (Ru), antimony (Sb), tellurium (Te), iodine (I), caesium (Cs), barium (Ba), iridium (Ir), lead (Pb), bismuth (Bi), polonium (Po), radon (Rn), radium (Ra), thorium (Th), and uranium (U).

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Section: Annex a Aerosol Data And Dose Coefficients For Radon Progenymentioning

confidence: 95%

ICRP Publication 137: Occupational Intakes of Radionuclides: Part 3

Paquet¹,

Bailey²,

Leggett³

et al. 2017

Ann ICRP

236

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“…In addition, RnDP appeared in the nucleation mode (attached to particles of 14-40 nm), the accumulation mode (210-310 nm), and the coarse mode (3000-5000 nm) (Porstendörfer, 2001). In an intercomparison experiment carried out in a test chamber, the AMD values of the unattached RnDP were found in the range from 0.53 to 1.76 nm, followed by a gap until about 50 nm when the attached RnDP appeared (Cheng et al, 2000). As reviewed by , f un differs substantially from place to place and, depending on the environmental conditions, its value range from 0.006 to 0.83.…”

Section: Size Distribution Of Radon Short-lived Decay Productsmentioning

confidence: 97%

Nano Particles Including Radon Decay Products in Ambient Air

Vaupotič¹

2011

Chemistry, Emission Control, Radioactive Pollution and Indoor Air Quality

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“…In addition, RnDP appeared in the nucleation (attached to particles of 14–40 nm), accumulation (210–310 nm), and coarse modes (3000–5000 nm) [ 32 ]. In an intercomparison experiment carried out in a test chamber, the AMD values of the unattached RnDP were found in the range from 0.53 to 1.76 nm, followed by a gap until about 50 nm when the attached RnDP appeared [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoaerosols Including Radon Decay Products in Outdoor and Indoor Air at a Suburban Site

Smerajec

Vaupotič

2012

Journal of Toxicology

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Nanoaerosols have been monitored inside a kitchen and in the courtyard of a suburban farmhouse. Total number concentration and number size distribution (5–1000 nm) of general aerosol particles, as measured with a Grimm Aerosol SMPS+C 5.400 instrument outdoors, were mainly influenced by solar radiation and use of farming equipment, while, indoors, they were drastically changed by human activity in the kitchen. In contrast, activity concentrations of the short-lived radon decay products 218Po, 214Pb, and 214Bi, both those attached to aerosol particles and those not attached, measured with a Sarad EQF3020-2 device, did not appear to be dependent on these activities, except on opening and closing of the kitchen window. Neither did a large increase in concentration of aerosol particles smaller than 10 or 20 nm, with which the unattached radon products are associated, augment the fraction of the unattached decay products significantly.

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Intercomparison of activity size distribution of thoron progeny and a mixture of radon and thoron progeny

Cited by 20 publications

References 38 publications

ICRP Publication 137: Occupational Intakes of Radionuclides: Part 3

ICRP Publication 137: Occupational Intakes of Radionuclides: Part 3

Nano Particles Including Radon Decay Products in Ambient Air

Nanoaerosols Including Radon Decay Products in Outdoor and Indoor Air at a Suburban Site

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