Re: Controlled Areas

[Slaback@micf.nist.gov]

Question 1  -  Does this mean that even though access can be limited, it
MAY not be limited?  [Correct, it does not have to be controlled but must
have the potential to be controlled.  The control issue becomes important
if you want to take advantage of the fact that it is controlled, i.e.,
project public dose at less than 100% occupancy.]

If this is true, then consider the definition of an unrestricted area:
"an area, access to which is neither limited nor controlled by the licensee."

Question 2 - Does this mean that controlled areas and unrestricted areas
can overlap?  [Geographically - yes, but not at the same time.]

There is supposed to be a regulatory advantage to declare an area a
controlled area, e.g., 2 mrem in any hour no longer applies.  But if I
limit access because of the dose rate, then the area is a restricted
area by definition.  I don't understand!
[With the change to 10CFR19 the downside to declaring the whole area
a restricted area no longer exists.  This larger area can be a 
restricted area with minimal requirements.  But this begs the question.
If the 'control' is established for reasons other than radiation protection
then it is not a restricted area, even though it results in advantages to
the rad. prot. program.]

Also, can someone tell me where the REGULATIONS stipulate what LIMITING
access to controlled and restricted areas means?  Is signage adequate?
Rope and stantion barriers?  Security guards with assult weapons?
[Yes.  And none of these.  It can simply be procedural control.  It
simply has to be appropriate for the situation at hand.  But regardless
of the regulatory requirement liability issues and organization P.R. will
usually mandate controls well in excess of anything 10CFR requires]

P.S.  Sorry about the blank message.  An erroneous mouse click is faster
than the neural synapse.