Solid-state microdosimeter for personal radon dosimetry in mines and caves

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dc.contributor.authorTran, LTen_AU
dc.contributor.authorJames, Ben_AU
dc.contributor.authorProkopovich, DAen_AU
dc.contributor.authorBoardman, DAen_AU
dc.contributor.authorWerczynski, Sen_AU
dc.contributor.authorChambers, SDen_AU
dc.contributor.authorWaring, CLen_AU
dc.contributor.authorWilliams, AGen_AU
dc.contributor.authorPovoli, Men_AU
dc.contributor.authorLok, Aen_AU
dc.contributor.authorJackson, Men_AU
dc.contributor.authorRosefeld, ABen_AU
dc.date.accessioned2025-04-17T06:34:24Zen_AU
dc.date.available2025-04-17T06:34:24Zen_AU
dc.date.issued2019-11-17en_AU
dc.date.statistics2025-03-28en_AU
dc.descriptionIn the item Scott Chambers is described as Scott Chamber (sic).en_AU
dc.description.abstractRadon gas can be found naturally from the materials in which it is formed that contain traces of uranium, actinium, thorium, or neptunium. Uranium and radium are commonly found in soil, rocks and water, especially in enclosed spaces such as mines, caves, cellars or poorly ventilated houses. Radon levels found in uranium, coal and metal mines, especially underground mines, can be up to orders of magnitude above ambient outdoor levels. Radon progeny attach easily to dust particles that can deposit in the lungs when inhaled. Once deposited in the lungs, the radon progeny emits alpha particles, mostly from short lived isotopes 218Po (T1/2 = 3.1 min, E = 6 MeV) and 214Po (T1/2=164.3 µs, E = 7.7 MeV), irradiating and damaging the DNA of lungs or proximal organ tissue, which may increase the risk of developing lung cancer - the second most common cause after smoking. Therefore monitoring radon levels in mines and caves is strictly required in order to protect workers from the health effects of radon exposure. Current radon detectors are bulky, expensive and only measure radon concentration, requiring conversion from concentration to dose which can result in large uncertainties [1]. This work presents a newly developed portable silicon on insulator (SOI) microdosimeter system for use in radon rich environments to measure the dose equivalent caused by 222Rn and its decay progeny. The microdosimeter used in this work is the Mushroom microdosimeters invented and developed by the CMRP, University of Wollongong and fabricated in collaboration with SINTEF MiNaLab, Oslo, Norway. The detector system directly measures in real time dose equivalent H(µSv/h) in a 222Rn gas environment rather than its calculation based on radon activity and dose conversion factor (DCF) as currently. The experiment was carried out at ANSTO environment lab where 245 kBq 226Ra source provides a radon concentration of approximately 150kBq/m3. A dose rate equivalent of 15.4 mSv/h and average quality factor ( ) of 19.96 was measured by the microdosimeter system for the given radon concentration. This result demonstrated that the microdosimeter system can be used in caves, mines for radon dose equivalent monitoring. Miniaturization of electronic personal microdosimeter is in progress and the preliminary results will be presented at the conference.en_AU
dc.identifier.citationTran, L. T., James, B., Prokopovich, D. A., Boardman, D., Werczynski, S., Chamber (sic), S., Waring, C., Williams, A., Povoli, M., Kok, A., Jackson, M., & Rosenfeld, A. (2019). Solid-state microdosimeter for personal radon dosimetry in mines and caves. Poster presented to the Fifth International Symposium on the System of Radiological Protection, Adelaide, South Australia, 17-21 November 2019. Retrieved from: https://www.icrp.org/page.asp?id=457en_AU
dc.identifier.conferenceenddate2019-11-21en_AU
dc.identifier.conferencenameFifth International Symposium on the System of Radiological Protectionen_AU
dc.identifier.conferenceplaceAdelaide, South Australiaen_AU
dc.identifier.conferencestartdate2019-11-17en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16144en_AU
dc.language.isoenen_AU
dc.publisherICRPen_AU
dc.relation.urihttps://www.icrp.org/page.asp?id=457en_AU
dc.subjectMicrodosimetryen_AU
dc.subjectRadonen_AU
dc.subjectDosimetryen_AU
dc.subjectMinesen_AU
dc.subjectCavesen_AU
dc.subjectTrace amountsen_AU
dc.subjectUraniumen_AU
dc.subjectActiniumen_AU
dc.subjectThoriumen_AU
dc.subjectNeptuniumen_AU
dc.subjectVentilationen_AU
dc.subjectDustsen_AU
dc.subjectTobacco smokesen_AU
dc.subjectLungsen_AU
dc.subjectNeoplasmsen_AU
dc.subjectOccupational exposureen_AU
dc.subjectOccupational safetyen_AU
dc.titleSolid-state microdosimeter for personal radon dosimetry in mines and cavesen_AU
dc.typeConference Posteren_AU
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