Re: Co-57 flood sources

[BLHamrick <BLHamrick@aol.com>]

In a message dated 98-05-07 10:47:18 EDT, DEngelbretson@tmh.tmc.edu writes:

<< Can Co-57 sources be discarded as general waste once they have decayed to
 background levels?  If so, how could they be surveyed to satisfy regulatory
 agencies? >>

Generally speaking, no.  Most decay in storage procedures are limited to
nuclides with half-lives of less than 65 days (sometimes extended to 90 days
to capture S-35).  This is codified in 10 CFR 35.92.  In agreement states, it
may be in their regulation, or, as in California, it may be included as a
license condition.

Barbara L. Hamrick
Los Angeles County - Radiation Management
BLHamrick@aol.com