Subpart
1.
Entrance controls required.
A. A licensee must ensure that each entrance
or access point to a high radiation area has one or more of the following
features:
(1) a control device that, upon
entry into the area, causes the level of radiation to be reduced below that
level at which an individual might receive a deep dose equivalent of 0.1 rem (1
mSv) in one hour at 30 centimeters from the radiation source or from any
surface that the radiation penetrates;
(2) a control device that energizes a
conspicuous visible or audible alarm signal so that the individual entering the
high radiation area and the supervisor of the activity are made aware of the
entry; or
(3) entryways that are
locked, except during periods when access to the areas is required, with
positive control over each individual entry.
B. In place of the controls required under
item A for a high radiation area, a licensee may substitute continuous direct
or electronic surveillance that is capable of preventing unauthorized
entry.
C. A licensee may apply to
the commissioner for approval of alternative methods for controlling access to
high radiation areas.
Subp.
2.
Egress required.
A licensee must establish the controls required under subpart
1 in a way that does not prevent individuals from leaving a high radiation
area.
Subp. 3.
Exception; package for transport.
Control is not required for each entrance or access point to
a room or other area that is a high radiation area solely because of the
presence of radioactive materials prepared for transport and packaged and
labeled according to the regulations of the DOT, provided that:
A. the packages do not remain in the area
longer than three days; and
B. the
dose rate at one meter from the external surface of any package does not exceed
0.01 rem (0.1 mSv) per hour.
Subp.
4.
Exception; hospitals.
Control of entrance or access to rooms or other areas in
hospitals is not required solely because of the presence of patients containing
radioactive materials, provided that there are personnel in attendance who will
take the necessary precautions to:
A.
prevent the exposure of individuals to radiation or radioactive material in
excess of the limits established under parts 4731.2000 to 4731.2950;
and
B. operate within the ALARA
provisions of the licensee's radiation protection program.
Notes
Minn. R. agency
144, ch. 4731, STANDARDS FOR PROTECTION AGAINST RADIATION, pt.
4731.2220
29 SR
755
Statutory Authority: MS s
144.1202;
144.1203
