Radiation Safety Training

Initial Radiation Safety Training

Module 6: Radiation Monitoring Badge Program

TLD dosimeter

Overview of the Module

This module provides information about the following topics:


Purpose of Radiation Monitoring

At Miami University, radiation monitor badges are provided to monitor occupational radiation exposure for those workers who use radiation sources under certain conditions.  Miami University monitor badges should not be used to measure occupational doses received at any other institution or to measure doses from non-occupational sources such as medical x-rays.  Individuals issued dosimters must make them accessible to Radiation Safety Office staff for quarterly replacement and may not wear someone else's dosimeter.  Individuals may request to see their dosimetry results at any time.
 

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When Radiation Monitoring Badges Are Required

State and federal regulations require that those persons who are likely to receive 10% or more of the Annual Radiation Dose Limits must be provided with radiation monitoring badges. This means that federal regulations require monitoring for any person likely to receive a whole body dose of 500 millrem or more or a skin or hand dose of 5000 millirem or more.

Miami University takes a conservative approach to monitoring individuals that use radioactive materials that emit high energy beta particles or gamma radiation.  Personal dosimetry may be required when a person is working with or in the vincinity of:

  • Beta emitters whose maximum energy is greater than 1 Mev
  • Gamma emitters
  • Neutron sources or neutron-generating devices
  • X-ray generating equipment

Dosimeters may also be issued at the request of the Approved User. This conservative approach results in the issuance of personal dosimetry more often than required by the regulatory requirements.

Temporary Badges

Temporary badges are available for workers whose high-level radioisotope use is sporadic and for visitors on campus. Radiation Safety maintains a small supply of temporary badges and can usually supply you with them the same day that you request one.

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When Radiation Monitoring Badges Are Not Issued

Monitoring badges are not routinely provided to workers who do not meet the criteria described in the section above.  For example, you will not be routinely provided with badges if using the following isotopes:

  • H-3
  • C-14
  • P-33
  • S-35
If you have concerns about your radiation exposure and would like to be monitored even though you do not meet the criteria to require monitoring, you may either contact the Radiation Safety Office directly or you may ask your Approved User to request badges for you.  If you request badges even though you do not meet the Required Monitoring Badge criteria, badges will be provided for you for a year.  After the first year of monitoring, Radiation Safety will meet with you to review your dose history and to discuss whether monitoring badges should be continued.

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Dose History at Miami Universiy

The following table provides information about doses received at Miami University during the years 2000-2006:
 

Year ODH 
Whole Body Dose Limit mrem/Year 
Highest 
Whole Body Dose mrem/year
ODH
Skin/Hand Dose Limit mrem/Year 
Highest 
Skin/Hand Dose mrem/Year
# of People Above ALARA* Levels
2000 5,000 11 50,000 32 to hand 0
2001 5,000 12 50,000 13 to hand 0
2002 5,000 22 50,000 24 to hand 0
2003 5,000 0 50,000 65 to skin 0
2004 5,000 12 50,000 43 to skin 0
2005 5,000 32 50,000 36 to hand 0
2006 5,000 15 50,000 236 to hand** 0

* ALARA (As Low As Reasonably Achievable) levels are established at 10% of    allowable limits

** Dose was received by a researcher performing frequent syntheses with mCi quantities of P-32.

During this period of time, no one received a dose high enough to require monitoring under state and federal regulations.

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Internal Monitoring

Current and anticipated usage quantities do not require bioassays.  Should usage requirements change significantly, appropriate monitoring based on nuclide, quantity, and types of use will be initiated. In the event of incidental exposure, appropriate biosampling will be accomplished through the University of Cincinnati, Department of Nuclear Medicine, Cincinnati, Ohio.

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You've completed the last of the six Radiation Basics modules.  You may now go to the test or you may go to any of the previous modules:

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Miami University's Radiation Safety Office would like to thank Sue Dupre and Princeton University for the training materials used in this website.

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