N.M. Admin. Code § 20.3.7.707

Current through Register Vol. 35, No. 21, November 5, 2024

Section 20.3.7.707 - CONTROL OF AEROSOLS AND GASES

A. System Requirements.

(1) A licensee who administers radioactive aerosols or gases shall do so with a system that shall keep airborne concentrations of the radioactive material, including releases to the environment, within the limits prescribed by 20.3.4 NMAC.

(2) The delivery or control system for the radioactive aerosols or gases shall either be directly vented to the atmosphere though an air exhaust or shall provide collection and decay or disposal of the aerosol or gas in a shielded container. Other federal, state or local regulatory requirements shall be met.

(3) The licensee shall perform check of the operation of reusable gas collection systems monthly or at other frequency approved by the department.

B. Room Requirements.

(1) A licensee shall only administer radioactive gases in rooms that are at negative pressure compared to surrounding rooms.

(2) The licensee shall perform measurements of ventilation rate at least semiannually or other frequency approved by the department for those areas of use required to operate under a negative pressure.

C. Clearance Time.

(1) Before receiving, using or storing a radioactive gas, the licensee shall calculate the amount of time needed after a release to reduce the concentration in the area of use to the limits in 20.3.4.461 NMAC. The calculation shall be based on the highest activity of gas handled in a single container and the measured available air exhaust rate.

(2) A licensee shall post the time calculated in Paragraph (1) of this subsection in the area of use and require that, in case of a gas spill, individuals evacuate the room until the posted time has elapsed or the concentration in the area of use is reduced below the limits in 20.3.4.461 NMAC.

D. Record keeping. A copy of the calculations required in Paragraph (1) of Subsection C of this section shall be retained in accordance with Subsection N of 20.3.7.715 NMAC.

N.M. Admin. Code § 20.3.7.707

20.3.7.707 NMAC - Rp, 20 NMAC 3.1.7.707, 4/30/2009