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What are the three basic principles of radiation exposure?
Justification Any time a new activity arises that puts people at risk via their occupation (as is the case for pilots or astronauts) The use of those sources are proven to be of reasonable benefit for the individual (as is the case where x-rays, CT and PET-CT equipment is used) or for society as a whole.
What are the three ways to protect against radiation?
In general, alpha, beta, gamma and x-ray radiation can be stopped by:
- Keeping the time of exposure to a minimum,
- Maintaining distance from the source,
- When appropriate, placing a shield between yourself and the source, and.
- Protecting yourself against radioactive contamination by using proper protective clothing.
What are the limits of exposure to radiation?
Adult: 5,000 Millirems 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.
What are the factors we need to consider to reduce exposure to radiation?
Time, Distance and Shielding Distance: Just as the heat from a fire reduces as you move further away, the dose of radiation decreases dramatically as you increase your distance from the source. Shielding: Barriers of lead, concrete, or water provide protection from penetrating gamma rays.
What is the principle of radiation?
General principles of radiation protection from the hazard of ionizing radiation are summarized as three key words; justification, optimization, and dose limit. Because medical exposure of radiation has unique considerations, diagnostic reference level is generally used as a reference value, instead of dose limits.
What are types of radiation?
The three most common types of radiation are alpha particles, beta particles, and gamma rays.
What are the principles of protection against external exposure of radiation?
Three principles for radiation safety: time, distance, and shielding.
How do you shield radiation?
Shielding: Barriers of lead, concrete, or water provide protection from penetrating radiation such as gamma rays and neutrons. This is why certain radioactive materials are stored under water or in concrete or lead-lined rooms, and why dentists place a lead blanket on patients receiving x-rays of their teeth.
What are the levels of radiation?
Orders of magnitude (radiation)
| Level (mSv) | Level in standard form (mSv) | Hourly equivalent (μSv/hour) |
|---|---|---|
| 0.1 | 1×10−1 | 0.011 |
| 0.15 | 1.5×10−1 | 0.017 |
| 0.25 | 2.5×10−1 | 0.028 |
| 0.27 | 2.7×10−1 | 0.031 |
