Section 120.920 - Inspection, Maintenance and Opening of a Source or Source Holder(A) Each licensee shall visually check source holders, logging tools, and source handling tools, for defects before each use to ensure that the equipment is in good working condition and that required labeling is present. If defects are found, the equipment must be removed from service until repaired, and a record must be made listing: the equipment involved, defects found, and retained for three years after the defect is found.(B) Each licensee or registrant shall have a program for semi-annual visual inspection and routine maintenance of source holders, logging tools, injection tools, source handling tools, storage containers, transport containers, and uraniun sinker bars to ensure that the required labeling is legible and that no physical damage is visible. If defects are found, the equipment must be removed from service until repaired, and a record must be made listing: date, equipment involved, inspection and maintenance operations performed, any defects found, and any actions taken to correct the defects. Records of inspection and maintenance shall be maintained for a period of three years for inspection by the Agency.(C) Removal of a sealed source from a source holder or logging tool, and maintenance on sealed sources or holders in which sealed sources are contained may not be performed by the licensee unless a written procedure developed pursuant to 105 CMR 120.932 has been approved either by the Agency pursuant to 105 CMR 120.903(C), the NRC, an Agreement State or a Licensing State.(D) If a sealed source is struck in the source holder, the licensee shall not perform any operation, such as drilling, cutting, or chiselling, on the source holder unless the licensee is specifically approved by the Agency to perform such operation.(E) The repair, opening, or modification of any sealed source shall be performed only by persons specifically authorized to do so by the Agency, the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State.