b.
External hazard present
c.
Shielding used to prevent external exposures
d.
Shielding arranged so as not to hinder experiments
e,
Major hazard from unsealed sources is contamination and
threat of ingestion
3.
Contamination problem
a.
Not easily seen as such
b.
Presence detected or verified through instruments
c.
Radioactive contamination easily transferred and spread on
contact or through ventilation
d.
Variables considered in dealing with radioactive contamination
e.
(1)
Extent of contamination
(2)
Location
(3)
Chemical and physical form
laboratory contamination limits set by following:
(1)
Employee health
(2)
Community health
(3)
Technical requirements - need to keep radiation below
background
4,
Methods of preventing contamination
a.
Building and laboratory design with following factors
considered
(1)
Nature of radioisotope programs involved
DOS ARCHIVES