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From MIT:

Adult: 5,000 Millirems per year

The current federal occupational limit of exposure per year for an adult (the limit for a worker using radiation) is "as low as reasonably achievable; however, not to exceed 5,000 millirems" above the 300+ millirems of natural sources of radiation and any medical radiation. Radiation workers wear badges made of photographic film which indicate the exposure to radiation. Readings typically are taken monthly. A federal advisory committee recommends that the lifetime exposure be limited to a person's age multiplied by 1,000 millirems (example: for a 65-year-old person, 65,000 millirems).

Minor: 500 Millirems

The maximum permissible exposure for a person under 18 working with radiation is one-tenth the adult limit or not to exceed 500 millirems per year above the 300+ millirems of natural sources, plus medical radiation. This was established in 1957 and reviewed as recently as 1990.

Fetus: 500 Millirems Or 50 Per Month (New Rule Jan. 1, 1994)

New federal regulations went into effect New Year's Day, establishing for the first time an exposure limit for the embryo or fetus of a pregnant woman exposed to radiation at work. The limit for the gestation period is 500 millirems, with a recommendation that the exposure of a fetus be no more than 50 millirems per month.

Weight Variables

Like alcohol intoxication levels, levels of exposure to radioactivity (due to radioactivity deposited in the body) depend on a person's weight. A diagnostic tracer of one microcurie of radioactive calcium 45, given orally, would result in an exposure of 3.7 millirems for a 100-pound person, and half of that, 1.85 millirems, for a 200-pound person.

Therapeutic Radiation

Therapeutic radiation treatment that is delivered by administering radioactive material via the mouth or by injection usually results in high, very localized doses to a small part of the body, which absorbs most of the radioactivity. The radioactivity concentrates and remains in the target organ (for example, the thyroid) for a longer period of time than does the radioactivity that is distributed to the rest of the body. The radiation exposure for other parts of the body is a function of the amount of radioactivity per pound and the time the radioactivity is present in the tissue.

As well if you are looking for ways to reduce your risk of radiation there are certain foods and supplements that you can take that can greatly reduce your risk, squidoo.com/radiation-alert-inspector-measure

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Q: How much nuclear radiation is considered safe for humans?
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Continue Learning about General Science

What do humans use fission for?

One use is in nuclear power plants to produce steam and turn turbines to generate electricity.Nuclear bombs ^.^


How much radiation does a computer transformer give off?

none. They are safe.


What will happen to man when one gets too much radiation?

he will burn from the inside out


Why is it that a person expose to radiation is no chance for survival?

A person's chances of dying of exposure to radiation depends on how much radiation they are exposed to.Radiation is a naturally occurring phenomenon. We are exposed to radiation through the sun, for example. Radiation is also found in man-made sources (ex. appliances, medical equipment). The human body, however, can only tolerate but so much exposure to radiation at any given time without damage.Radiation is often measured in REMS. Exposure to the sun will yield approximately 5-20 REMS. If exposed to 50-100 REMS of radiation, a person would experience mild radiation poisoning, with symptoms like headache, a temporary lowering of red blood cell count and even temporary male sterility.Between 100-200 REMS, humans experience light radiation poisoning. Symptoms include mild to moderate nausea and vomiting, fatigue, immune system suppression, miscarriage and even death in 10% of cases.Between 200-300 REMS, fatality occurs in 35% of cases.Between 600-1,000 REMS, fatality is almost 100% within 2 weeks of exposure.During the explosion of the power plant Chernobyl in the Soviet Union in 1986, the workers at the plant were exposed to fatal levels of radiation. Estimates are that those who died immediately were exposed to approximately 8,000 REMS of radiation.


How much gas do humans use a year?

All of it

Related questions

How much concrete is needed to block nuclear radiation?

My Astronomy professor says that we need at least 15 feet of concrete to block nuclear radiation.


Why is radiation being created?

Its being created because nuclear power plants are giving of to much radiation


What is the difference between waves used in microwave ovens and nuclear radiation?

Both microwave radiation and nuclear electromagnetic radiation are members of the same species, but they're as different as babies are from elephants, to wit, microwaves are much, much less powerful than nuclear electromagnetic radiation. Microwave radiation, for instance, makes atoms shift their position (and magnetic fields) very, very quickly. Now the definition of heat is "movement," so the faster anything moves, the "hotter" we say it is. Ergo, something placed in a microwave-radiation-field becomes noticeably "hotter." But comparing microwave and nuclear electromagnetic radiation is like comparing a face-slap to a 20-ton BOMB. Nuclear radiation comes from atomic nuclei, so "nuclear radiation" can strike, penetrate, damage, and even destroy atoms in their path. Big difference, capiche? Huge.We left out the part about nuclear particulate radiation. There is no comparison there. Additionally, nuclear electromagnetic radiation is ionizing radiation while microwave radiation is not.


How much radiation are humans exposed to yearly?

800 msv


Does radiation therapy affect the lungs and or heart?

Yes, nuclear radiation can affect the lungs. The radiation can be cancerous and dangerous, so try not to breathe too much of it.


What is the difference between nuclear radiation and heat radiation?

Heat radiation is infrared radiation, which is a relatively low frequency radiation, slightly lower than that of visible light. Nuclear radiation includes a variety of types, including X rays and gamma rays, which are very high frequency radiation, and which are consequently much more dangerous, and can cause radiation sickness. There are also other types of nuclear radiation such as alpha rays, beta rays, and neutrons, all of which are in the form of subatomic particles rather than electromagnetic radiation.


What will happen to you if the nuclear plant radiate in front of you?

if you get too much radiation you will die, simple as that.


What are the uses of nuclear radiation?

Nuclear Warfare to kill people, according to the first answer to this question. Nuclear medicine is the use of radiation to treat or cure disease. It is often used in cancer treatments. Nuclear imaging is the use of radiation to create images, for example, to follow pattern of blood flow in internal organs. Radiography uses radiation (x-rays) to create an image that contrasts dense areas of a body with softer areas, for example, in dentistry or orthopedics. Nuclear radiation is used to make batteries for spacecraft. Nuclear radiation is used in ionizing smoke detectors. Nuclear radiation creates much of the heat inside the earth. Without it the core would solidify and earth would not be habitable. Naturally occurring nuclear radiation is used to locate fault lines and to place dates on volcanic eruption. Nuclear radiation produces about 10% of the world's electricity. Radiation was used for peaceful purposes many years before it was used for bombs. Most uses of radiation are peaceful and productive.


How much radiation do you receive per year in your lives?

.2 gamma radiation every year for humans but it is natural


What does radiation cause?

Radiation is emitted from the sun to the Earth as short-wavelength radiation. It is also the energy that is released from a nucleus as it breaks-up, when the nuclear force acting on the nucleus is not enough to hold it together.


Four uses of nuclear radiation?

Nuclear radiation is used to make batteries for spacecraft. Nuclear radiation is used in ionizing smoke detectors. Nuclear radiation creates much of the heat inside the earth. Without it the core would solidify and earth would not be habitable.


How much danger does the US face with Japan's nuclear plant radiation fallout?

The U.S does not face much of a threat from the radiation in Japan but it may quite be possible for the minimal amounts of radiation to get here, possibly the amount a microwave emits when activated.