What are the requirements of EURATOM for assessment of cosmic radiation exposure?
EURATOM requires that that aircraft capable of operating at altitudes of more than 49,000 feet should be equipped with active radiation monitors. Dragonair does not currently have any aircraft of this type. In the case of aircraft operating at 26,000 to 49,000 (all of the Dragonair fleet), EURATOM requires that the dosage to crew members should be assessed by computer program prediction. For annual doses calculated as less than 6 mSv, no further action is required, but it is recommended that where annual doses could exceed 4 mSv, the monitoring of individual exposures by computer program is conducted to ensure that no individual dose exceeds 6 mSv. Dragonair has also adopted an additional internal action level to ensure that crew will not exceed the recommended exposure dose. A special case is made for pregnant aircrew. Once pregnancy is declared, the maximum dose equivalent permitted is 1mSv for the remainder of the pregnancy. It must be emphasized that the above limits are in additio
