NAC459.600. X-ray and electron therapy installations: Dose monitors.

     1. Irradiation must not be possible until a selection of a number of dose monitor units has been made at the treatment control panel.

     2. After useful beam termination, it must be necessary to reset the preselected dose monitor units before treatment can be reinitiated.

     3. The preselected number of dose monitor units must be displayed at the treatment control panel until reset for the next irradiation.

     4. Each of the monitoring systems must be capable of independently terminating irradiation. Provisions must be made to test the correct operation of each system.

     5. Each primary system must terminate irradiation when the preselected number of dose monitor units has been reached and each secondary system must be used as a backup.

     [Bd. of Health, Radiation Control Reg. §§ 6.9.1.5-6.9.1.6.2, eff. 2-28-80]