Journal
RADIATION PROTECTION DOSIMETRY
Volume 138, Issue 4, Pages 295-309Publisher
OXFORD UNIV PRESS
DOI: 10.1093/rpd/ncp265
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Funding
- Canadian Space Agency (CSA) [08/7003491]
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Radiation measurements of surface and deep organ doses were performed aboard the International Space Station, for the period of January 2006 to April 2007, using a MOSFET dosimetry system combined with the Matroshka-R spherical phantom. The averaged internal and surface dose rates are found to be 0.19 and 0.29 mGy d(-1) respectively. The levels of radiation dose to blood-forming organs (BFO) and to surface organs are compared with recommended safe limits. The maximum measured BFO dose has an average dose rate of 0.23 mGy d(-1) (84 mGy y(-1)), corresponding to 44 % of the recommended ommended annual limit of 0.5 Sv, for a space radiation quality factor of 2.6. The annual surface dose is found to he higher at 126 mGy, corresponding to 16 %, of the eye dose limit and to 11 % of the skin dose limit. Doses calculated using the Spenvis software showed deviations of up to 37 % from measurements.
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