RE: Lower limit for SCO 1 classification

[Glen.Vickers@ucm.com]

I believe NUREG 1608 explicitly states that the contamination limits are
those on the equipment and your smears can only be a tenth of that limit
because of the 10% smear efficiency.

As far as lower limits go, NUREG 1608, 3.1.2. says that if your material is
<2 nCi/g, 2200 dpm/100 cm^2 beta/gamma, and 220 dpm/100 cm^2 alpha then it
is below DOT concern.  This is where the free-release policy for your
facility comes in.
 
NUREG 1608 3.1.3. says that if you have a "limited quantity", then you may
ship as a limited quantity and not SCO.

Sincerely,
Glen Vickers
glen.vickers@ucm.com

	-----Original Message-----
	From:	ausbrookskl@ornl.gov [SMTP:ausbrookskl@ornl.gov]
	Sent:	Wednesday, November 04, 1998 11:06 AM
	To:	Multiple recipients of list
	Subject:	Lower limit for SCO 1 classification

	Radsafers,
		A review of 49CFR173 gives the upper limits for SCO 1
classification as
	22000 dpm/100 cm2 beta gamma and 2200 dpm/100cm2 alpha transferable.
NUREG
	1608 provides some additional guidance, however, I have two
questions:

	1.  Do these limits include the 10% smearing efficiency correction
like
	49CFR173 Table 11 limits?  I have heard that they do not.

	2.  What are the lower limits for the SCO 1 classification?  One
document I
	have seen states this limit as 2200 dpm/100cm2 beta and 220 dpm/100
cm2
	alpha TOTAL (fixed plus transferable).

	Can any of you DOT-meisters provide some clarification here?  Please
	respond via private email if you do not think this is worthy of
RadSafe
	bandwidth.

	Thanks,
	Kelly

	Kelly Ausbrooks
	BJC RadCon
	502-441-5123
	
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