Activity Limits for Use of Radionuclides in Various Types of Workplaces

["Redmond, Randy (RXQ)" <redmondrr@Y12.doe.gov>]

As usual, looking for some info and help.  The Rad Health Handbook contains

a table which breaks radionuclides down into four (or five) groups  based on

radiotoxicity.  Limits are placed on the amount of activity depending on the

particular workplace used - benchtop, hood, glovebox and modifying factors

(dry/dusty ops, storage, etc.).



What is the basis for the activity levels?  Are they based on the ALI of

each (seems not, since U-234 is consider very highly toxic and U-235/U-238

are low) or what? Will working at the activity levels with the controls

given calculate to one ALI per year?  I do not have a copy of "Guidelines

for the Radiation Protection of Workers in Industry (Ionizing Radiations)"

which appears to be the source document.



Thank you,



Randy Redmond (32458)

Radiological Control Organization

BWXT Y-12 L.L.C.

Oak Ridge, TN

865-574-5640





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