§ 35.2642. Records of periodic spot-checks for teletherapy units.
191 words·~1 min read·
/us/cfr/t10/s§ 35.2642·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)A licensee shall retain a record of each periodic spot-check for teletherapy units required by § 35.642 for 3 years.
(b)The record must include—
(1)The date of the spot-check;
(2)The manufacturer's name, model number, and serial number of the teletherapy unit, source and instrument used to measure the output of the teletherapy unit;
(3)An assessment of timer linearity and constancy;
(4)The calculated on-off error;
(5)A determination of the coincidence of the radiation field and the field indicated by the light beam localizing device;
(6)The determined accuracy of each distance measuring and localization device;
(7)The difference between the anticipated output and the measured output;
(8)Notations indicating the operability of each entrance door electrical interlock, each electrical or mechanical stop, each source exposure indicator light, and the viewing and intercom system and doors; and
(9)The name of the individual who performed the periodic spot-check and the signature of the authorized medical physicist who reviewed the record of the spot-check.
(c)A licensee shall retain a copy of the procedures required by § 35.642(b) until the licensee no longer possesses the teletherapy unit.