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Cosmic Radiation Exposure of Aircraft Crew under the Impact of Geomagnetic Vertical Cutoff Rigidity: Case Study of International Flights from Suvarnabhumi Airport, Thailand


Paper Type 
Contributed Paper
Title 
Cosmic Radiation Exposure of Aircraft Crew under the Impact of Geomagnetic Vertical Cutoff Rigidity: Case Study of International Flights from Suvarnabhumi Airport, Thailand
Author 
Dumrongsak Rodphothong, Ongard Thiabgoh and Tanin Nutaro
Email 
dumrongsak.r@rumail.ru.ac.th
Abstract:

      Aircrew members are occupationally exposed to higher levels of galactic cosmic radiation than the general population in most parts of the world. The International Commission on Radiological Protection (ICRP) is concerned by the exposure of aircrews to cosmic radiation. The cosmic radiation intensity in the Earth atmosphere depends on many factors, e.g., the solar activity, altitude, and geomagnetic vertical cutoff rigidity on Earth. This study aimed to calculate the occupational radiation dose for aircraft crews during the solar minimum and maximum on fl ights from Suvarnabhumi Airport (BKK), Thailand, to 11 destinations worldwide. Based on the Monte Carlo simulation code of CARI-7 and JISCARD GUI, the cosmic radiation doses on fl ights was calculated. The maximum dose of a roundtrip fl ight (Bangkok–Helsinki) during the solar minimum condition was approximately 97.4 μSv (CARI-7) and 84.7 μSv (JISCARD GUI). The maximum radiation dose corresponded to 110 and 20 roundtrips for general aircraft crew and pregnant crew, respectively. This fi nding indicates that the polar-latitude region of Helsinki fl ights at low vertical cutoff rigidity ranges is of concern in terms of high-exposure cosmic radiation. The uncertainty associated with the result of the two codes was less than 30%. Therefore, the results were in reasonable agreement, and the codes could be used to calculate the exposure of aircraft crew to cosmic radiation.

Start & End Page 
496 - 510
Received Date 
2021-08-09
Revised Date 
2021-12-06
Accepted Date 
2021-12-30
Full Text 
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Keyword 
cosmic radiation exposure, aircrew, vertical cutoff rigidity, Monte Carlo simulation, Suvarnabhumi Airport
Volume 
Vol.49 No.2 (March 2022)
DOI 
https://doi.org/10.12982/CMJS.2022.032
Citation 
Rodphothong D., Thiabgoh O. and Nutaro T., Cosmic Radiation Exposure of Aircraft Crew under the Impact of Geomagnetic Vertical Cutoff Rigidity: Case Study of International Flights from Suvarnabhumi Airport, Thailand, Chiang Mai J. Sci., 2022; 49(2): 496-510. DOI 10.12982/CMJS.2022.032.
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