32 Ill. Adm. Code 340.1045
Decay-In-Storage
Section 340.1045 Decay-In-Storage
A licensee may store waste containing or composed of
radioactive material with a physical half-life of less than 120 days for
"decay-in-storage" before disposal as normal waste without regard to
its radioactivity if it:
a)
Holds the radioactive material for
a minimum of 10 half-lives; and
b) Pursuant
to Section 340.510(a) and (b), performs radiation surveys prior to disposal of
the radioactive material to ensure that the material's radioactivity cannot be
distinguished from background radiation levels. The package/container surface
shall be surveyed with an appropriate radiation detection survey instrument set
on its most sensitive scale, with no interposed shielding between the detector
and the material, in a low background radiation environment; and
c) Maintains
records of monitoring to include: date of disposal; date placed in storage;
manufacturer, model and serial number of the survey instrument used; background
radiation levels; and measured radiation levels; and
d) Records
the identity of the individual performing the monitoring; and
e) Removes or obliterates
all radiation labels.