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Smith MB, Khulapko S, Andrews HR, Arkhangelsky V, Ing H, Koslowksy MR, Lewis BJ, Machrafi R, Nikolaev I, Shurshakov V. Bubble-detector measurements of neutron radiation in the international space station: ISS-34 to ISS-37. RADIATION PROTECTION DOSIMETRY 2016; 168:154-166. [PMID: 25899609 PMCID: PMC4884878 DOI: 10.1093/rpd/ncv181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 03/02/2015] [Accepted: 03/06/2015] [Indexed: 06/04/2023]
Abstract
Bubble detectors have been used to characterise the neutron dose and energy spectrum in several modules of the International Space Station (ISS) as part of an ongoing radiation survey. A series of experiments was performed during the ISS-34, ISS-35, ISS-36 and ISS-37 missions between December 2012 and October 2013. The Radi-N2 experiment, a repeat of the 2009 Radi-N investigation, included measurements in four modules of the US orbital segment: Columbus, the Japanese experiment module, the US laboratory and Node 2. The Radi-N2 dose and spectral measurements are not significantly different from the Radi-N results collected in the same ISS locations, despite the large difference in solar activity between 2009 and 2013. Parallel experiments using a second set of detectors in the Russian segment of the ISS included the first characterisation of the neutron spectrum inside the tissue-equivalent Matroshka-R phantom. These data suggest that the dose inside the phantom is ∼70% of the dose at its surface, while the spectrum inside the phantom contains a larger fraction of high-energy neutrons than the spectrum outside the phantom. The phantom results are supported by Monte Carlo simulations that provide good agreement with the empirical data.
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Affiliation(s)
- M B Smith
- Bubble Technology Industries, PO Box 100, Chalk River, ON, Canada K0J 1J0
| | - S Khulapko
- Institute for Biomedical Problems, Russian Academy of Sciences, 76A Khoroshevskoe sh., Moscow 123007, Russia RSC-Energia, 4A Lenin str., Korolev, Moscow Region 141070, Russia
| | - H R Andrews
- Bubble Technology Industries, PO Box 100, Chalk River, ON, Canada K0J 1J0
| | - V Arkhangelsky
- Institute for Biomedical Problems, Russian Academy of Sciences, 76A Khoroshevskoe sh., Moscow 123007, Russia
| | - H Ing
- Bubble Technology Industries, PO Box 100, Chalk River, ON, Canada K0J 1J0
| | - M R Koslowksy
- Bubble Technology Industries, PO Box 100, Chalk River, ON, Canada K0J 1J0
| | - B J Lewis
- Faculty of Energy Systems and Nuclear Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, Canada L1H 7K4
| | - R Machrafi
- Faculty of Energy Systems and Nuclear Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, Canada L1H 7K4
| | - I Nikolaev
- RSC-Energia, 4A Lenin str., Korolev, Moscow Region 141070, Russia
| | - V Shurshakov
- Institute for Biomedical Problems, Russian Academy of Sciences, 76A Khoroshevskoe sh., Moscow 123007, Russia
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Beaton-Green LA, Lachapelle S, Straube U, Wilkins RC. Evolution of the Health Canada astronaut biodosimetry program with a view toward international harmonization. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2015; 793:101-6. [DOI: 10.1016/j.mrgentox.2015.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 07/24/2015] [Indexed: 11/26/2022]
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