As a guide, Prof Rowlands reckons the risk of being exposed to five millisieverts
of radiation is the same as travelling 2,000 miles in a car or smoking 75 cigarettes.
The guideline sets the lifetime permissible levels of space radiation, such as protons and baryons from the sun, at 600 to 1,200 millisieverts
for astronauts, depending on their sex and age at the time of their first space flight.
Exposure to 100 millisieverts
is the legal limit for nuclear plant workers
causes temporary radiation sickness such as nausea and vomiting,
While the amount of radiation outside the plant, measured in microsieverts and millisieverts
, is small, dosages are cumulative.
The Japanese environment ministry had released an estimate last month that over 960 square miles, or 2,400 square kilometers, of land would have to be decontaminated to achieve an annual radiation exposure limit of five millisieverts
Tokyo, June 28 (ANI): A British researcher has said that although concerns have been raised after it was revealed that over three millisieverts
of radiation has been measured in the urine of 15 residents living near the Fukushima Daiichi Nuclear Power Plant, this by itself 'shouldn't pose too much of a hazard'.
Currently the government is evacuating residents around the plant based on the annual radiation exposure limit of 20 millisieverts
, indicated by the International Commission on Radiological Protection at the time of emergency.
of radiation annually, according to data from the United Nations.
a day, while expectations were at 1 to 2 millisieverts
TEPCO said about 2,000 workers with thyroid gland doses of 100 millisieverts
or more are qualified for cervical ultrasound inspection.
The radiation readings were from 70 to 1,800 millisieverts
per hour, although none of the tanks showed any visible fall in their water levels, the plant operator said, adding it is investigating the cause.