Current through Register Vol. 49, No. 13, September 23, 2024
Subpart 1.
Applicability.
This part applies to irradiators whose construction began
after July 1, 1993. The requirements of this part must be met prior to loading
sources.
Subp. 2.
Panoramic irradiators.
For panoramic irradiators, a licensee must:
A. monitor the construction of the shielding
to verify that its construction meets design specifications and generally
accepted building code requirements for reinforced concrete;
B. monitor the construction of the
foundations to verify that their construction meets design
specifications;
C. test the
movement of the source racks for proper operation prior to source loading.
Testing must include source rack lowering due to simulated loss of
power;
D. test the completed access
control system to ensure that it functions as designed and that all alarms,
controls, and interlocks work properly;
E. test the ability of the heat and smoke
detectors to detect a fire, to activate alarms, and to cause the source rack to
automatically become fully shielded;
F. test the operability of the fire
extinguishing system;
G.
demonstrate that the source racks can be returned to their fully shielded
positions without off-site power;
H. if a computer system is used to control
the access control system, verify that the access control system will operate
properly if off-site power is lost and verify that the computer has security
features that prevent an irradiator operator from commanding the computer to
override the access control system when it is required to be operable;
and
I. verify that the electrical
wiring and electrical equipment that were installed meet the design
specifications.
Subp. 3.
Pool and underwater irradiators.
For pool and underwater irradiators, a licensee must
verify:
A. that the pool meets design
specifications and must test the integrity of the pool;
B. that outlets and pipes meet the
requirements under part 4731.6110, item C;
C. that the water purification system, the
conductivity meter, and the water level indicators operate properly;
D. for pool irradiators, the proper operation
of the radiation monitors and the related alarm if used to comply with part
4731.6190, subpart 2; and
E. for
underwater irradiators, the proper operation of the over-the-pool monitor,
alarms, and interlocks required under part 4731.6090, subpart 2.
Subp. 4.
All
irradiators.
For all irradiators, a licensee must verify the proper
operation of the monitor to detect sources carried on the product conveyor
system and the related alarms and interlocks required under part 4731.6090,
subpart 1.
Subp. 5.
Irradiators with product conveyor systems.
For all irradiators with product conveyor systems, a licensee
must observe and test the operation of the conveyor system to ensure that the
requirements under part 4731.6120 are met for protection of the source rack and
the mechanism that moves the rack. Testing must include tests of any limit
switches and interlocks used to protect the source rack and mechanism that
moves the rack from moving product carriers.
Statutory Authority: MS s
144.1202;
144.1203
