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Submitted by Tatsuhiko Sato, Japan Atomic Energy Agency
   Commenting as an individual
Document Radiological Protection from Cosmic Radiation in Aviation
 
Lines 564-566
Given their low frequency and the level of individual dose involved, the contribution of SPEs to the total lifetime exposure of aircraft crew to cosmic radiation is therefore marginal.

This conclusion comes from the analysis of SPEs that observed from 1942. Before that, there were much larger solar flare events such as the Carrington event in 1859. In addition, a similar class event was observed in 2012, which fortunately did not hit the Earth. Thus, I propose to add the sentence
"However, this conclusion was derived from only from the neutron monitor observations, and might not be true for historically large events such as the Carrington event in 1859. The solar storm of 2012 was of similar magnitude, which fortunately did not hit the Earth."
at the end of the paragraph.

Lines 969-971
Because the contribution of SPEs to the total dose is marginal, the
Commission does not recommend the use of specific monitoring systems such as real time alert systems.

I cannot agree with this context because the contribution of SPEs to the total dose might not be marginal, as I wrote above. In addition, the radiation doses due to large SPEs exceed 1 mSv/h, which is not trivial for passengers especially for pregnant women. Thus, I propose to change this sentence to
"Although the contribution of SPEs to the total dose is marginal in most cases, it could be envisaged to reduce the radiation doses during large SPEs. Development of specific monitoring systems such as real time alert systems is desirable."