Minn. R. agency 144, ch. 4731, MEDICAL USE OF RADIOACTIVE MATERIAL, pt. 4731.4506

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

Part 4731.4506 - RELEASE RECORDS; INDIVIDUALS CONTAINING RADIOACTIVE MATERIAL OR IMPLANTS

Subpart 1.Release basis.

A licensee must retain a record of the basis for authorizing the release of an individual according to part 4731.4427, if the total effective dose equivalent is calculated by:

A. using the retained activity rather than the activity administered;

B. using an occupancy factor less than 0.25 at one meter;

C. using the biological or effective half-life; or

D. considering the shielding by tissue.

Subp. 2.Instructions to mothers.

A licensee must retain a record that the instructions required under part 4731.4427, item B, were provided to a breast-feeding woman if the radiation dose to the infant or child from continued breast-feeding could result in a total effective dose equivalent exceeding 0.5 rem (5 mSv).

Subp. 3.Retention period.

The records required under this part must be retained for three years after the date of release of the individual.

Minn. R. agency 144, ch. 4731, MEDICAL USE OF RADIOACTIVE MATERIAL, pt. 4731.4506

29 SR 755

Statutory Authority: MS s 144.1202; 144.1203