High Contamination Area - doe-hdbk-1106-97

DOE-HDBK-1106-97

Abbreviated Table of Contamination Values

(See 10 CFR 835 Appendix D for Complete Listing)

NUCLIDE

REMOVABLE

TOTAL

500

I-125

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 removable 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 the derived air concentration

(DAC) values listed in Appendix A or Appendix C of 10 CFR 835 or where an

individual in the area without respiratory protection could receive an intake

exceeding 12 DAC-hours in a week.