Originally Posted by: paul_pipkin 
I dunno that I'd bail on the date. 
But I WOULD have a TLD dosimeter with me. If I found I was about to accumulate too high a dose, I'd be outta there!
Even if you have a TLD dosimeter in Tokyo, you can't escape radiation because it is everywhere. Fukushima is only at 300 km from Tokyo.
As nuclear Radiation is very energetic, it is going through your body to break your DNA molecules, this fact causes cancer. DNA molecules are responsable to build your healthy cells, if your DNA molecules are broken by nuclear radiation, they start building "bad cells" so you have a cancer.
If you stay many times in an area where the radiation is high, it will be easy to have a cancer in the future. 
REMEMBER RADIATION MAKES MILLIONS OF YEARS TO LEAVE YOUR BODY.
Thermoluminescent Dosimeter
Thermoluminescent dosimeters (TLD) are often used instead of the film badge. Like a film badge, it is worn for a period of time (usually 3 months or less) and then must be processed to determine the dose received, if any. Thermoluminescent dosimeters can measure doses as low as 1 millirem, but under routine conditions their low-dose capability is approximately the same as for film badges. TLDs have a precision of approximately 15% for low doses. This precision improves to approximately 3% for high doses. The advantages of a TLD over other personnel monitors is its linearity of response to dose, its relative energy independence, and its sensitivity to low doses. It is also reusable, which is an advantage over film badges. However, no permanent record or re-readability is provided and an immediate, on the job readout is not possible.
How it works
A TLD is a phosphor, such as lithium fluoride (LiF) or calcium fluoride (CaF), in a solid crystal structure. When a TLD is exposed to ionizing radiation at ambient temperatures, the radiation interacts with the phosphor crystal and deposits all or part of the incident energy in that material. Some of the atoms in the material that absorb that energy become ionized, producing free electrons and areas lacking one or more electrons, called holes. Imperfections in the crystal lattice structure act as sites where free electrons can become trapped and locked into place.
Heating the crystal causes the crystal lattice to vibrate, releasing the trapped electrons in the process. Released electrons return to the original ground state, releasing the captured energy from ionization as light, hence the name thermoluminescent. Released light is counted using photomultiplier tubes and the number of photons counted is proportional to the quantity of radiation striking the phosphor.
Instead of reading the optical density (blackness) of a film, as is done with film badges, the amount of light released versus the heating of the individual pieces of thermoluminescent material is measured. The "glow curve" produced by this process is then related to the radiation exposure. The process can be repeated many times.
"I'd love to open a tennis school for children in my hometown of Sochi." said Sharapova Maria.
