Bioradiation Dosimetry in Spaceflight (Brados) - 06.06.18

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ISS Science for Everyone

Science Objectives for Everyone
Bioradiation Dosimetry in Spaceflight (Bradoz) creates methods of bioradiation dosimetry for more precise assessments of biologically significant dose loads on the human body during long-term spaceflights. During Bradoz, complex studies are performed that make possible the establishment of a stable, reliable correlation between the physical characteristics of ionizing cosmic radiation being measured and the vitally important biological effects of radiation exposure.
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.

The following content was provided by Yury A. Akatov, and is maintained in a database by the ISS Program Science Office.
Experiment Details


Principal Investigator(s)
Yury A. Akatov, Institute of Biomedical Problems, Moscow, Russia

Information Pending

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Sponsoring Space Agency
Russian Federal Space Agency (Roscosmos)

Sponsoring Organization
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Research Benefits
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ISS Expedition Duration
November 2000 - August 2001; December 2001 - December 2002; November 2002 - May 2003; April 2003 - October 2005

Expeditions Assigned

Previous Missions
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Experiment Description

Research Overview
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Space Applications
Bradoz results can be used during the creation and operation of a system for accounting of and monitoring individual radiation doses in space explorers during the period of their professional activity.

Earth Applications
The Earth Application for this investigation has yet to be identified.

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Operational Requirements and Protocols
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Decadal Survey Recommendations

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Results/More Information

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.

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Results Publications

    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.

    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.

    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.

    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.

    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.

    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.

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Ground Based Results Publications

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ISS Patents

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Related Publications

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Related Websites
Energia - Science Research on the ISS Russian Segment

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image Brados Kit detectors.
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