BoilerUP
Citation style...
- Joined
- Nov 11, 2003
- Posts
- 5,311
A little thread drift but it is a related subject.
The line about "100 chest xrays per hour" shocked me.
I did a quick search and that number sounds inaccurate. I did learn that it will take me 27 years to establish a 1-100 chance of developing a fatal cancer. Considering that I am 13 years into the process really suks.
Another item I found was the huge impact of solar flares. Unfortunately, a "solar maximum" is supposed to begin during the summer of 2011 and it will last more than one year. The amount of radiation exposure during this period will be the equivalent of 10 to 20 YEARS of radiation, depending on the type of flying involved.
If I was flying long haul over the higher latitudes I would seriously bid a different schedule.
Bizjet studs up in the high 40's and even 510 are going to bear the brunt of the radiation.
We may need to update the retirement charts as a whole bunch of us are going to get nuked over the next couple of years. Good times.
AC 120-61A says the recommended occupational exposure limit for ionizing radiation is a 5-year average effective dose of 20 millisieverts per year, with no more than 50 millisieverts in a single year.
To put the amount of flying it would take to get to the recommended 20 millisievert annual limit of exposure into perspective, after taking into consideration the 2.95 millisievert average exposure from natural sources everybody gets, you could fly 40 round-trips from NYC to Dubai, or 62 round trips from Beijing to Chicago, or 500 domestic mid-latitude, 4-hour legs up at FL450.
Concern about cosmic radiation exposure *is* valid...but I think how many Diet Cokes or cheeseburgers the average pilot consumes will be a FAR larger factor in their risk for health issues and/or cancer than the amount of radiation one gets while flying.