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Question 119: Is it permissible under 10 CFR Part 20 for a
licensee to have a controlled area that is controlled for
purposes of radiation protection but that is not a
restricted area?
Answer: No. By definition, in Part 20, a "restricted
area means an area, access to which is limited by the
licensee for the purpose of protecting individuals against
undue risks from exposure to radiation and radioactive
materials." As stated in the answer to Question 26 (a)
under the heading "Controlled Area": ". . . an area that
satisfies both the definition of a restricted area and the
definition of a controlled area is considered to be a
restricted area for purposes of compliance with Part 20."
(Reference: 10 CFR 20.1003)