Minn. R. agency 144, ch. 4731, MEDICAL USE OF RADIOACTIVE MATERIAL, pt. 4731.4475

Current through Register Vol. 49, No. 29, 2025

Part 4731.4475 - MOBILE REMOTE AFTERLOADER UNITS; ADDITIONAL REQUIREMENTS

Subpart 1.General requirements.

A licensee providing mobile remote afterloader service must:

A. check survey instruments before medical use at each address of use or on each day of use, whichever is more frequent; and

B. account for all sources before departure from a client's address of use.

Subp. 2.Check requirements.

In addition to the periodic spot checks required under part 4731.4473, a licensee authorized to use mobile afterloaders for medical use must perform checks on each remote afterloader unit before use at each address of use. At a minimum, checks must be made to verify the operation of:

A. electrical interlocks on treatment area access points;

B. source exposure indicator lights on the remote afterloader unit, on the control console, and in the facility;

C. viewing and intercom systems;

D. applicators, source transfer tubes, and transfer tube-applicator interfaces;

E. radiation monitors used to indicate room exposures;

F. source positioning (accuracy); and

G. radiation monitors used to indicate whether the source has returned to a safe shielded position.

Subp. 3.Simulated treatment cycle.

In addition to the requirements for checks under subpart 2, a licensee must ensure proper overall operation of the remote afterloader unit by conducting a simulated cycle of treatment before use at each address of use.

Subp. 4.Malfunctions.

If the results of the checks required under subpart 2 indicate the malfunction of any system, a licensee must lock the control console in the off position and not use the unit except as may be necessary to repair, replace, or check the malfunctioning system.

Subp. 5.Record retention.

A licensee must retain a record of each check required under subpart 2 according to part 4731.4522.

Minn. R. agency 144, ch. 4731, MEDICAL USE OF RADIOACTIVE MATERIAL, pt. 4731.4475

29 SR 755

Statutory Authority: MS s 144.1202; 144.1203