Non-destructive measurements of natural radionuclides in building materials for radon entry rate assessment

To control the specific activity of 226 Ra in building materials of operated buildings, a non-destructive in situ method consisted in measurements of gamma spectra with a fixed geometry of the detector position in a room is suggested. The calculation of the average specific activity of natural radio...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2021-05, Vol.328 (2), p.727-737
Main Authors: Yarmoshenko, Ilia, Vasilyev, Aleksey, Ekidin, Aleksey, Pyshkina, Maria, Malinovsky, Georgy, Onishchenko, Aleksandra, Zhukovsky, Michael
Format: Article
Language:English
Subjects:
Architecture and energy conservation
Building materials
Chemistry
Chemistry and Materials Science
Construction materials
Detectors
Diagnostic Radiology
Environmental engineering
Flux density
Hadrons
Heavy Ions
Inorganic Chemistry
Mathematical analysis
Measurement
Multistory buildings
Nondestructive testing
Nuclear Chemistry
Nuclear Physics
Photopeak
Physical Chemistry
Radiation
Radiation effects
Radioisotopes
Radium 226
Radon levels
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Summary:To control the specific activity of 226 Ra in building materials of operated buildings, a non-destructive in situ method consisted in measurements of gamma spectra with a fixed geometry of the detector position in a room is suggested. The calculation of the average specific activity of natural radionuclides in building materials is carried out by comparing the calculated flux density of unscattered gamma quanta normalized to the specific activity of 100 Bq/kg, and the experimentally measured count rates in the photopeak. For the measured values of the average specific activity of 226 Ra in building materials, the expected values of radon concentration in rooms were calculated. The developed method has been verified for rooms in modern multi-storey energy-efficient buildings. Concentrations of 232 Th and 40 K in building materials which contribute to the indoor external radiation exposure can be measured by developed method also.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-021-07690-3