Radiation Monitoring Badges

State regulations require that any individual who is likely to receive 10% of any applicable limit must be provided with a monitoring device.

Although most individuals who work with radioactive materials or radiation-emitting equipment at KUMC never approach values that require personnel monitoring, KUMC will provide monitoring at the request of a worker.  Requests can be made by filling out the Request for a Radiation Monitor and bringing it to the EHS Office (G032 Wescoe).  Usually a badge can be given to a user the same day the form is turned in.

The whole body badges that EHS can issue to radiation workers have some limitations (see table below).

Lower Limit of Detection (keV)

Gamma and X-Rays

Beta Particles

Radiosotopes Commonly Used at KUMC that the Badges Cannot Detect Accurately**

Whole Body Badge

5

150

H-3 (18 keV), C-14 (157 keV), S-35 (167 keV), P-33 (249 keV), Ca-45 (258 keV)

Rings

15

200


** Note:  Most radioisotopes emit beta particles in a range of energies.  The energies listed for the radioisotopes in the table above are the maximum.  However, the majority of the beta particles emitted for these radioisotopes are at an energy of 1/3 of the maximum beta energy.

The EHS Office can advise workers when radiation badges are required.  Anyone who wishes to be issued a badge is encouraged to ask for one.  No one will be turned away by the EHS office.

In general, the EHS Office strongly recommends that individuals working with millicurie quantities of P-32, Rb-86 and  I-125 wear radiation badges.

What Happens After the Badge is Issued:

The EHS Office will ask what type of work will be done so that a recommendation can be made about the orientation of the badge.  It is important to wear the badges so that the badge is recording the maximum exposure received.  For example, ring badges can be worn with the "recording chip" facing toward the palm of the hand or toward the back of the hand.  The orientation chosen is determined by the types of handling of radioactive materials that will be done.

EHS will advise you on the appropriate wear period for the badge.  The wear period is the amount of time you will wear a particular badge before it is sent to be processed (usually quarterly or monthly) and how the badge exchange will take place at the end of each wear period.

When a badge is issued to a radiation worker, the badge must be worn at all times at all times when work is being done with radioactive materials.

Badges are processed by a vendor who holds current accreditation from the National Voluntary Laboratory Accreditation Program (NVLAP) of the National Bureau of Standards.  It generally takes several weeks after the end of the wear period to get badge readings from the vendor.  If you would like information on your radiation exposure, call the EHS Office (8-6126) or email a request for that information.

Last modified: Aug 21, 2014
ID=x22355