Medical Radiology and Radiation Safety. 2020. Vol. 65. No. 1. P.59–64

A.K. Sukhoruchkin

Application of the ICRP Database for Calculation of the Dose Coefficient for Aerosol Having Multimodal Particle Size Distribution

National Research Centre “Kurchatov Institute”.
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Abstract

Purpose: Development of a method for calculating radioactive aerosol dose coefficient when the aerosol particle size measurements resulted in a multimodal radionuclide activity distribution by particle diameters.

Material and methods: The physical prerequisite for the proposed method is that the multimodal distribution may be caused by the presence of several sources of aerosols with different particle sizes. In the ICRP database to each value of the aerosol dose coefficient there corresponds one of ten functions of log-normal (unimodal) distribution with specified parameters. In the developed method the result of the aerosol particle size measurement is approximated by the sum of said standard functions with weight factors of each of the functions defined such that the best least squares approximation is obtained. Then the dose coefficient of the aerosol under study is calculated based on the dose value additivity property, i.e. each weight factor is multiplied by a respective value of the dose coefficient from the ICRP database, and the obtained products are added up.

Results: There was carried out a series of numerical experiments, in each of which “experimental” points were simply plotted on a graph of a certain cumulative distribution function. Coordinates of the points are used as input for the programme implementing the developed algorithm. The calculated dose coefficient value is compared with the true value and/or the value obtained with the linear interpolation method using the AMAD.

Conclusion: Physical prerequisites and results of numerical experiments confirm the validity of the developed method.

Key words: radioactive aerosol, aerodynamic diameter of a particle, activity distribution, approximation, dose coefficient, ICRP database

For citation: Sukhoruchkin AK. Application of the ICRP Database for Calculation of the Dose Coefficient for Aerosol Having Multimodal Particle Size Distribution. Medical Radiology and Radiation Safety. 2020;65(1):59-64. (In Russ.).

DOI: 10.12737/1024-6177-2020-65-1-59-64

Список литературы / References

1. Международные основные нормы безопасности для защиты от ионизирующих излучений и безопасного обращения с источниками излучения. Серия изданий по безопасности № 115. – Вена: МАГАТЭ. 1997. 382 с. [IAEA. International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources. Safety Series No. 115, 1996. (In Russ.)].
2. Нормы радиационной безопасности (НРБ-99/2009). СП 2.6.1.2523-09. М. 2009. 100 с. [Radiation Safety Standards (NRB-99/2009). SP 2.6.1.2523-09. Moscow. 2009, 100 p. (In Russ.)].
3. The ICRP Database of Dose Coefficients: Workers and Members of the Public. ICRP CD-ROMS (Version 3.0, 1998–2011).
4. Human Respiratory Tract Model for Radiological Protection, ICRP Publication 66, Annals of ICRP, 1994.
5. Райст П. Аэрозоли. Введение в теорию. М.: «МИР». 1987. 287 с. [Reist PC. Introduction to Aerosol Science. New York: Macmillan, 1984, 299 p. (In Russ.)].
6. Сухоручкин АК. Расчет дозового коэффициента аэрозоля произвольной дисперсности. В сб.: «Проблемы безопасности атомных электростанций и Чернобыля». 2005. Вып. 3, ч. 1. С. 98–101. [Sukhoruchkin AK. Calculation of the dose factor for aerosol having arbitrary particle size distribution. In: Safety issues related to nuclear power plants and Chernobyl. 2005. Issue 3, Part 1, P. 98–101. (In Russ.)].
7. Maple 2018.2. Licensed to: NRC Kurchatov Institute. www.maplesoft.com.
8. Фукс НА. Механика аэрозолей. М.: Изд-во АН СССР. 1955. 352 с. [Fuks NA. The Mechanics of Aerosols. Moscow, USSR Academy of Sciences Publishing House. 1955. 352 p. (In Russ.)].

PDF (RUS) Full-text article (in Russian)

Conflict of interest. The author declares no conflict of interest.

Acknowledgments. The author expresses sincere gratitude to Shinkarev CM, Dr Sci Tech, for comments and discussion of this article.

Financing. This work was supported by the Research Center “Kurchatov Institute” (order of August 14, 2019, No. 1808).

Article received: 23.01.2020. Accepted for publication: 27.01.2020.