(1) A licensee
authorized to use a remote afterloader unit for medical use shall perform full
calibration measurements on each remote afterloader unit:
(a) Before the first medical use of the
unit;
(b)
1. Before medical use following replacement
of the source or following reinstallation of the unit in a new location outside
the facility; and,
2. Before
medical use 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,
(c) At
intervals not exceeding 1 quarter for high dose-rate, medium dose-rate, and
pulsed dose-rate remote afterloader units with sources whose half-life exceeds
75 days; and,
(d) At intervals not
exceeding 1 year for low dose-rate remote afterloader
units.
(2) Full
calibration measurements of remote afterloader unit shall include the
determination of:
(a) The output within 5
percent;
(b) Source positioning
accuracy to within 1 millimeter;
(c) Source retraction with backup battery
upon power failure;
(d) Timer
constancy and linearity over the range of use;
(e) Length of the source transfer
tubes;
(f) Length of the
applicators; and,
(g) Function of
the source transfer tubes, applicators, and transfer tube-applicator
interfaces.
(3) A
licensee shall use the dosimetry system described in Rule
64E-5.640, F.A.C., to measure
the output for one set of exposure conditions. The remaining radiation
measurements required in paragraph
64E-5.6411(2)(a),
F.A.C., may be made using a dosimetry system that indicates relative dose
rates.
(4) A licensee shall make
full calibration measurements required by subsection
64E-5.6411(1),
F.A.C., in accordance with published protocols accepted by nationally
recognized bodies.
(5) A licensee
shall correct mathematically the outputs determined in paragraph
64E-5.6411(2)(a),
F.A.C., for physical decay at intervals consistent with 1 percent physical
decay.
(6) Full calibration
measurements required by subsection
64E-5.6411(1),
F.A.C., and physical decay corrections required by subsection
64E-5.6411(5),
F.A.C., shall be performed by the authorized medical physicist.
(7) In addition to the requirements for full
calibrations for low dose-rate remote afterloader units in subsection
64E-5.6411(2),
F.A.C., a licensee shall perform an autoradiograph of the source(s) to verify
inventory and source(s) arrangement at intervals not exceeding 1
quarter.
(8) For low dose-rate
remote afterloader units, a licensee may use measurements provided by the
source manufacturer that are made in accordance with subsections
64E-5.6411(1)
-(5), F.A.C.
(9) A licensee shall
maintain a record of each remote afterloader unit calibration for three years.
The record shall include the following:
(a)
The date of the calibration;
(b)
The manufacturer's name, model number, and serial number for both the remote
afterloader unit and the source;
(c) The model numbers and serial numbers of
the instruments used to calibrate the remote afterloader unit;
(d) The results and an assessment of the full
calibrations.
(e) The results of
the autoradiograph required for low dose-rate remote afterloaders;
and,
(f) The signature of the
authorized medical physicist.