{"data":{"id":"us/10-cfr-35.2642","jurisdiction":"us","citation":"10 CFR 35.2642","heading":"Records of periodic spot-checks for teletherapy units.","body":"(a) A licensee shall retain a record of each periodic spot-check for teletherapy units required by § 35.642 for 3 years.\n(b) The record must include—\n(1) The date of the spot-check;\n(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;\n(3) An assessment of timer linearity and constancy;\n(4) The calculated on-off error;\n(5) A determination of the coincidence of the radiation field and the field indicated by the light beam localizing device;\n(6) The determined accuracy of each distance measuring and localization device;\n(7) The difference between the anticipated output and the measured output;\n(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\n(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.\n(c) A licensee shall retain a copy of the procedures required by § 35.642(b) until the licensee no longer possesses the teletherapy unit.","path":["Title 10—Energy","CHAPTER I—NUCLEAR REGULATORY COMMISSION","PART 35—MEDICAL USE OF BYPRODUCT MATERIAL","Subpart L—Records"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-10.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:09Z","sha256":"536aeb4c8fc6dd0c98aef1943b53e98219632225929fbd22043919799f8e176c","source_id":"us-cfr","stale":true,"prev":"us/10-cfr-35.2632","next":"us/10-cfr-35.2643"},"notice":"GroundRules: Original legal text. Not legal advice."}