What is the balanced equation for radioactive iodine-131.
The banana equivalent dose is the radiation exposure received by eating a single banana. Radiation leaks from nuclear plants are often measured in extraordinarily small units (the picocurie, a millionth of a millionth of a curie, is typical). By comparing the exposure from these events to a banana equivalent dose, a more realistic assessment of the actual risk can sometimes be obtained.
Bananas Are Radioactive Comment. This fact sounds more exciting than it really is. Bananas contain potassium, and it turns out that about 120 parts per million of that potassium is radioactive. With 450 mg of potassium in one medium banana, you would have to consume an impossibly large quantity of the yellow fruit to notice any effects from radiation. Still, it makes for a fun fact to tell.
Attack of the Killer Bananas. The thing to remember about the Banana Equivalent Dose — and one of the reasons it’s not really used in any meaningful way when comparing radiation exposures — is that different radioactive isotopes act in different ways, and can affect the human body in different ways.
Radiation at unimaginable levels 300 tons of radioactive water leaking daily into the Pacific TEPCO needs 40 years to fix with radiation already on West-Coast US Fukushima nuclear plant in Japan is now leaking radiation at record levels. radiation levels could be many time higher than the 530 Sieverts per hour already recorded in other parts of the site; 300 tons of radioactive water leaking.
Bananas, by comparison, have an average radiation level of only 3520 picocuries per kg (3), although this is still high enough to place them among the more radiation-heavy foods. The source of the radiation is potassium, specifically radioactive isotope K40 inside potassium. Anything with potassium is radioactive because of this isotope, but few foods have the banana's potassium punch.
Banana equivalent dose (BED) is an informal measurement of ionizing radiation exposure, intended as a general educational example to compare a dose of radioactivity to the dose one is exposed to by eating one average-sized banana. Bananas contain naturally occurring radioactive isotopes, particularl.
The element that makes bananas official radioactive food is an isotope of potassium. Potassium-40 (K-40) is about .01 percent of all potassium. It has a half-life of around 1.25 billion years.