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|  DOE-HDBK-1106-97
Abbreviated Table of Contamination Values
(See 10 CFR 835 Appendix D for Complete Listing)
NUCLIDE
REMOVABLE
TOTAL
dpm/100cm2
I-125
20
500
I-131, I-133
200
1,000
Beta/gamma
1,000
5,000
Tritium
10,000*
N/A
3.
High Contamination Area
Any area where contamination levels are greater than 100 times the values listed in
Appendix D of 10 CFR 835.
A DAC is the radionuclide airborne concentration. Breathing an air concentration of 1
DAC for 1 working year (2,000 hours) will result in committed dose equivalent equal to
an annual limit, i.e., 5 rem whole-body or 50 rem to any organ or tissue.
The posting/sign will indicate:
"DANGER, HIGH CONTAMINATION AREA" "Radiological Work Permit
(RWP) Required for Entry."
4.
Airborne Radioactivity Area
Any area where the measured concentration of airborne radioactivity, above natural
background, exceeds or is likely to exceed 10 percent of the derived air concentration
(DAC) values listed in Appendix A or Appendix C of 10 CFR 835.
15
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