APPENDIX A

     

    The University of Colorado ALARA Program

    The University of Colorado maintains a Radioactive Materials license through the Colorado Department of Public Health and Environment (CDPHE).  The ALARA philosophy, or As Low As Reasonably Achievable, is a regulatory requirement for all radiation protection programs.  The University actively works to reduce dose and exposure due to radiation in our radiation safety program.  This reduction in dose and exposure should be accomplished in accordance with ALARA with an emphasis on protecting individuals at the University, including members of the general public.


    ALARA Levels

Dosimetry - External Monitoring
The ALARA levels used for monthly and/or quarterly monitoring are as follows:
     
    Level I Level II Level III
    Whole Body Dose: 50 mrem 300 mrem 500 mrem
    Skin Dose: 50 mrem 500 mrem 5,000 mrem
    Lens of the Eye Dose: 50 mrem 500 mrem 1,500 mrem
    Extremity Dose: 50 mrem 500 mrem 5,000 mrem
    Individual Organ Dose: 50 mrem 500 mrem 5,000 mrem

    Actions taken:

  1. Dose/Exposure less than Level I – No action unless deemed necessary by RSO.
  2. Dose/Exposure equal to or greater than Level I - Notification of employee and the RSC.  A copy of this notification is maintained in the individual’s dosimetry file.
  3. Dose/Exposure equal to or greater than Level II - Notification of employee and the RSC.  A copy of this notification is maintained in the individual’s dosimetry file.  The employee is encouraged to investigate and evaluate techniques for reducing future exposure in their work.  Assistance may be provided by Health Physics.
  4. Dose/Exposure equal to or greater than Level III (10% of Annual Limit) - Notification of employee and the RSC.  A copy of this notification is maintained in the individual’s dosimetry file.  An investigation will be performed by the employee and Health Physics.  A written report explaining the exposure will be provided for their dosimetry file and the RSC.

Bioassay - Internal Monitoring
The ALARA levels (modified in 1999 to match CDPHE license conditions) used to monitor internal contamination are as follows:
     
    Level I Level II Level III
    Thyroid (Iodine-125): 60 nCi 120 nCi 500 nCi
    Thyroid (Iodine-131): 20 nCi 40 nCi 140 nCi
    Urinalysis (Tritium): 10 uCi/liter 28 uCi/liter 50 uCi/liter

    Actions taken:

  1. Exposure less than Level I – No action unless deemed necessary by Radiation Safety Officer.  A copy of the bioassay report is given to the employee and placed in his/her dosimetry file.  Bioassays will be performed at the following intervals:
  2. Exposure equal to or greater than Level I - Notification of employee and the Radiation Safety Committee.  A copy of this notification is maintained in the individual’s dosimetry file.  The employee is encouraged to discuss experimental protocols with Health Physics to seek ways of reducing future exposures.
  3. Exposure equal to or greater than Level II - Notification of employee and the Radiation Safety Committee.  A copy of this notification is maintained in the individual’s dosimetry file.  In addition,
  4. Exposure equal to or greater than Level III - Notification of employee and the Radiation Safety Committee. A copy of this notification is maintained in the individual’s dosimetry file.  In addition,
  5. If any bioassay shows dose levels exceeding the limits listed in RH 4.52 of the Colorado Rules and Regulations Pertaining to Radiation Control, the notification requirements will be completed, with follow-up written reports to CDPHE within 30 days.

  6.  

     

                     Total Effective Dose Equivalent --
                      IMMEDIATE NOTIFICATION OF CDPHE:  25 rem
                      24-HOUR NOTIFICATION OF CDPHE:  5 rem

                    Total Organ Dose Equivalent --
                      IMMEDIATE NOTIFICATION OF CDPHE:  250 rad
                      24-HOUR NOTIFICATION OF CDPHE:  50 rem


Sealed Sources
The ALARA levels used with leaking sealed sources are as follows:
     
    Level I Level II
    Tier I source/wipe: 0.001 uCi 0.005 uCi
Actions taken:
  1. Contamination less than Level I – No action taken unless deemed necessary by RSO.
  2. Contamination equal to or greater than Level I - Notification of user and the RSC.  It is recommended that the source be monitored more frequently and possibly removed from circulation,  repaired, or disposed of as radioactive waste.
  3. Contamination equal to or greater than Level II - Notification of user, the RSC, and CDPHE (RH 4.58).  The source is removed from use for repair or disposal by Health Physics personnel.

Radiation Surveys
The ALARA levels currently used for Contamination Surveys are as follows:
     
    Level I Level II
    dpm/100 cm2 100 1,000
Actions taken:
  1. Contamination less than Level I – No action taken unless deemed necessary by RSO.
  2. Contamination equal to or greater than Level I - Notification of the licensee/lab and RSC.  Immediate clean-up of the area is recommended.  Documentation is maintained by the laboratory involved.
  3. Contamination equal to or greater than Level II - Notification of  the licensee/lab and RSC.  Immediate clean-up is required and the area is re-surveyed by Health Physics staff.  Documentation is maintained by the laboratory involved and Health Physics.
The ALARA levels currently used for Freezer Frost Contamination are as follows:
     
    Level I Level II Level III
    dpm/100 cm2 or per ml 100 1,000 10,000
Actions taken:

Radioactive Material Receipt and Inventory
The following ALARA levels are in effect for packages received:

 
Level I Level II
dpm/100 cm2 on outside of vial 1,000 10,000
dpm/100 cm2 on outside of box 100 --
mR/hr on outside surface of box -- 200
    Actions taken:
  1. Contamination/Exposure rate less than Level I on vial or box – No action taken unless  deemed necessary by RSO.  Package is delivered to laboratory.
  2. Contamination equal to or greater than Level I on vial - Notification of laboratory and the RSC.  The laboratory is reminded of safe handling practices and has the right to refuse the package. Contamination equal to or greater than Level I on box - An alternate box with appropriate certification and labeling may be used to transport the package, provided the vial is not contaminated.  The contaminated box is disposed of as radioactive waste.
  3. Contamination equal to or greater than Level II on vial - Notification of laboratory and the RSC.  The package is not delivered to the laboratory but is instead disposed of at Health Physics as radioactive waste.  Arrangements for replacement are the responsibility of the laboratory involved.
  4. Exposure rate equal to or greater than Level II on box - CDPHE is contacted for further instruction before the box is opened by Health Physics staff.

Table of Contents

Appendices List

Appendix B