What is a locked high radiation area?
In the CFR, NRC defines a HRA as “an area, accessible to individuals, in which radiation levels from radiation sources external to the body could result in an individual receiving a dose equivalent in excess of 0.1 rem (1 mSv) in 1 hour at 30 centimeters from the radiation source or 30 centimeters from any surface that …
What is a very high radiation area?
Very high radiation area means any area accessible to individuals in which radiation levels could result in an individual receiving an absorbed dose in excess of 500 rads (5 grays) in one hour at 1 meter from a radiation source or from any surface that the radiation penetrates.
What is considered a radiation area?
A “radiation area” is defined in 10 CFR 20.202 (b) (2) as any area, accessible to personnel, in which radiation, originating in whole or in part within licensed material, exists at such levels that a major portion of the body could receive a dose greater than 5 millirem in 1 hour or greater than 100 millirem in 5 …
What is the agency that designates the different restrictive levels for radiation areas?
NRC (U.S. Nuclear Regulatory Commission) regulations for radiation protection programs (10 CFR 20.1101) or state regulations for such programs apply to some specific radiation sources and occupational settings.
What is a controlled area radiography?
Controlled Area: A controlled area is a limited access area in which the occupational exposure of personnel to radiation is under the supervision of an individual in charge of radiation protection. This implies that access, occupancy, and working conditions are controlled for radiation protection purposes.
What is the highest level of radiation that’s safe?
The highest recommended limit for radiation exposures is for astronauts-25,000 millirems per Space Shuttle mission, principally from cosmic rays. This amount is beyond the average 300+ millirems of natural sources of radiation and any medical radiation a person has received.
What is radiation controlled area?
Controlled Radiation Area – This is a work area in which the annual radiation doses may exceed 3/10ths of the annual maximum permissible doses for exposed workers. It is the main disposal point for aqueous radioactive waste and is usually equipped with a fume cupboard for dispensing isotopes.
Who can legally enter a controlled radiation area?
No medical is required. Risk of over exposure is negligible provided handling limits and systems of work are followed. In general only classified radiation workers are permitted in a controlled radiation area but other workers may have access provided they follow the procedures of an Approved Scheme of Work.