Washington Administrative Code
Title 246 - Health, Department of
RADIATION
Chapter 246-240 - Radiation protection Medical use of radioactive material
PHOTON EMITTING REMOTE AFTERLOADER UNITS, TELETHERAPY UNITS, AND GAMMA STEREOTACTIC RADIOSURGERY UNITS
Section 246-240-372 - Full calibration measurements on remote after-loader units
Current through Register Vol. 24-24, December 15, 2024
(1) A licensee authorized to use a remote afterloader unit for medical use shall perform full calibration measurements on each unit:
(2) To satisfy the requirement of subsection (1) of this section, full calibration measurements must include, as applicable, determination of:
(3) A licensee shall use the dosimetry system described in WAC 246-240-366(1) to measure the output.
(4) A licensee shall make full calibration measurements required by subsection (1) of this section in accordance with published protocols accepted by nationally recognized bodies.
(5) In addition to the requirements for full calibrations for low dose-rate remote afterloader units in subsection (2) of this section, a licensee shall perform an autoradiograph of the sources to verify inventory and sources arrangement at intervals not exceeding one calendar quarter.
(6) For low dose-rate remote afterloader units, a licensee may use measurements provided by the source manufacturer that are made in accordance with subsections (1) through (5) of this section.
(7) A licensee shall mathematically correct the outputs determined in subsection (2)(a) of this section for physical decay at intervals consistent with one percent physical decay.
(8) Full calibration measurements required by subsection (1) of this section and physical decay corrections required by subsection (7) of this section must be performed by the authorized medical physicist.
(9) A licensee shall retain a record of each calibration in accordance with WAC 246-240-614.
Statutory Authority: RCW 70.98.050. 06-05-019, § 246-240-372, filed 2/6/06, effective 3/9/06.