OAR 333-116-0340
Control of Aerosols and Gases
(1)
A licensee who administers radioactive aerosols or gases must do so with a system that will keep airborne concentrations within the limits prescribed by OAR 333-120-0130 (Radiation Dose Limits: Determination of Internal Exposure) and 333-120-0180 (Radiation Dose Limits: Dose Limits for Individual Members of the Public).(2)
The system must either be directly vented to the atmosphere through an air exhaust or provide for collection and decay or disposal of the aerosol or gas in a shielded container.(3)
A licensee must only administer radioactive gases in rooms that are at negative pressure compared to surrounding rooms.(4)
Before receiving, using or storing a radioactive gas, the licensee must calculate the amount of time needed after a release to reduce the concentration in the area of use to the occupational limit listed in 10 CFR Part 20 Appendix B to 20.1001 to 20.2401. The calculation must be based on the highest activity of gas handled in a single container and the measured available air exhaust rate.(5)
A licensee must post the time calculated in accordance with section (4) of this rule at the area of use and require that, in case of a gas spill, individuals evacuate the room until the posted time has elapsed.(6)
A licensee must check the operation of collection systems before each use and measure the ventilation rates in areas of use at intervals not to exceed six months. Records of these checks and measurements must be maintained for five years or until inspected by the Authority.(7)
A copy of the calculations required in section (4) of this rule must be recorded and retained for the duration of the license.
Source:
Rule 333-116-0340 — Control of Aerosols and Gases, https://secure.sos.state.or.us/oard/view.action?ruleNumber=333-116-0340
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