Acquisition of Data About the Radiological, Electromagnetic and Different Physical Environments on Board ISS, and Their Effects on the Safety of the Crew, Space Equipment and Materials (Brados) - 11.22.16
Information Pending Science Results for Everyone
Researchers measured radiation inside the space station and crew exposure in order to develop more reliable estimates of the radiation risk in low-Earth orbit. The project obtained experimental materials for assessing biologically significant human radiation dose during space flight. Results convincingly showed that using only thermo-luminescent detectors (which measure emitted visible light) give an absorbed dose reading with an error of up to 10 percent and an equivalent dose with an error of plus or minus 30 percent. This error can be reduced by using both thermo-luminescent and solid-state track detectors, which measure radiation based on tracks the particles etch in a solid material. Experiment Details
Yury A. Akatov, Institute of Biomedical Problems, Moscow, Russia
Sponsoring Space Agency
Russian Federal Space Agency (Roscosmos)
ISS Expedition Duration
November 2000 - August 2001; December 2001 - December 2002; November 2002 - May 2003; April 2003 - October 2005
Development tests of radiation and biological dosimetry techniques.
Operational Requirements and Protocols
Thermoluminescence detectors for recording the spectra of linear transmission of heavy charged particles and radiation damage of the genetic system, Solid-state track detectors for recording of integral absorbed doses of ionizing radiation, Biological objects (seeds of higher plants).
Assessment of biologically significant dosage loads on a human organism in space.
Decadal Survey Recommendations
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During the course of research for the Bradoz project, experimental materials were obtained for assessing the biologically significant dose loads on the human body during spaceflight. The results of the Bradoz experiment convincingly showed that dose measurements in International Space Station compartments using only thermo-luminescent detectors gave an absorbed dose error of up to 10% (reduced) and an equivalent dose error of up to ± 30% due to possible variations in the radiation quality factor. This error can be reduced through the use of a combined method, consisting of the joint use of thermo-luminescent and solid-state track detectors.^ back to top
Hajek M, Berger T, Vana N, Fugger M, Palfalvi JK, Szabó J, Eordogh I, Akatov YA, Arkhangelsky VV, Shurshakov VA. Convolution of TLD and SSNTD measurements during the BRADOS-1 experiment onboard ISS (2001). Radiation Measurements. 2008; 43(7): 1231-1236. DOI: 10.1016/j.radmeas.2008.04.094.
Berger T, Hajek M, Summerer L, Vana N, Akatov YA, Shurshakov VA, Arkhangelsky VV. Austrian dose measurements onboard space station MIR and the International Space Station - overview and comparison. Advances in Space Research. 2004; 34(6): 1414-1419. DOI: 10.1016/j.asr.2003.08.063.
Szabó J, Palfalvi JK, Dudas B, Akatov YA, Eordogh I. Cosmic ray detection on the ISS by a 3 axes track etch detector stack and the complementary calibration studies. Radiation Measurements. 2008 February; 43(2-6): 688-693. DOI: 10.1016/j.radmeas.2008.02.016.
Tsetlin VV, Akatov YA, Arkhangelsky VV, Mitrikas VG, Bondarenko VA, Makin SA. Results of Monitoring Radiation Conditions Inside the ISS RS (2000–2005). Aviakosmicheskaia i Ekologicheskaia Meditsina (Aerospace and Environmental Medicine). 2006; 40(5): 21-25.
Hajek M, Berger T, Fugger M, Furstner M, Vana N, Akatov YA, Shurshakov VA, Arkhangelsky VV. Dose Distribution in the Russian Segment of the International Space Station. Radiation Protection Dosimetry. 2006; 120(1-4): 446-449. DOI: 10.1093/rpd/nci566.
Hajek M, Berger T, Fugger M, Furstner M, Vana N, Akatov YA, Shurshakov VA, Arkhangelsky VV. BRADOS - Dose determination in the Russian Segment of the International Space Station (2006). Advances in Space Research. 2006 January; 37(9): 1664-1667. DOI: 10.1016/j.asr.2006.01.015.
Ground Based Results Publications
Energia - Science Research on the ISS Russian Segment
Brados Kit detectors.
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