Full calibration measurements on remote afterloader units.

CFR · 2024-01-01 · US · Title 10

(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: (i) Following replacement of the source or following reinstallation of the unit in a new location outside the facility; and (ii) 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 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 (4) At intervals not exceeding 1 year for low dose-rate remote afterloader units. (b) To satisfy the requirement of paragraph (a) of this section, full calibration measurements must include, as applicable, determination of: (1) The output within ±5 percent; (2) Source positioning accuracy to within ±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 § 35.630(a) to measure the output. (d) A licensee shall make full calibration measurements required by paragraph (a) of this section in

official document · source cfr-2024 · id 10:§ 35.633