Ariz. Admin. Code § R9-7-735 - Full Calibration Measurements on Remote After-loader Units
A. A licensee
authorized to use a remote afterloader unit for medical use shall perform full
calibration measurements on each unit:
1.
Before the first medical use of the unit;
2. Before medical use under the following
conditions:
a. Following replacement of the
source or following reinstallation of the unit in a new location outside the
facility; and
b. Following any
repair of the unit that includes removal of the source or major repair of the
components associated with the source exposure assembly; and
3. At intervals not exceeding one
quarter for high dose-rate, medium dose-rate, and pulsed dose-rate remote
after-loader units with sources whose half-life exceeds 75 days; and
4. At intervals not exceeding one year for
low dose-rate remote afterloader units.
B. To satisfy the requirement of subsection
(A), full calibration measurements shall include, as applicable, determination
of:
1. The output within plusmn; 5
percent;
2. Source positioning
accuracy to within plusmn; 1 millimeter;
3. Source retraction with backup battery upon
power failure;
4. Length of the
source transfer tubes;
5. Timer
accuracy and linearity over the typical range of use;
6. Length of the applicators; and
7. Function of the source transfer tubes,
applicators, and transfer tube-applicator interfaces.
C. A licensee shall use the dosimetry system
described in R9-7-733(A) to measure the output.
D. A licensee shall make full calibration
measurements required by subsection (A) in accordance with published protocols
accepted by nationally recognized bodies.
E. In addition to the requirements for full
calibrations for low dose-rate remote afterloader units in subsection (B), a
licensee shall perform an autoradiograph of the sources to verify inventory and
source arrangement at intervals not exceeding one quarter.
F. For low dose-rate remote afterloader
units, a licensee may use measurements provided by the source manufacturer that
are made in accordance with subsections (A) through (E).
G. A licensee shall mathematically correct
the outputs determined in subsection (B)(1) for physical decay at intervals
consistent with 1 percent physical decay.
H. Full calibration measurements required by
subsection (A) and physical decay corrections required by subsection (G) shall
be performed by an authorized medical physicist.
I. A licensee shall retain a record of each
calibration for three years from the date it was completed.
Notes
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