Minnesota Administrative Rules
Agency 144 - Health Department
Chapter 4731 - RADIATION SAFETY
MEDICAL USE OF RADIOACTIVE MATERIAL
Part 4731.4421 - CALIBRATION OF SURVEY INSTRUMENTS
Universal Citation: MN Rules 4731.4421
Current through Register Vol. 49, No. 13, September 23, 2024
A. A licensee must calibrate the survey instruments used to show compliance with parts 4731.2000 to 4731.2950 and 4731.4400 to 4731.4527 before first use, intervals not to exceed 12 months, and following a repair that affects the calibration. A licensee must:
(1) calibrate
all scales with readings up to 1,000 millirems (10 mSv) per hour with a
radiation source;
(2) calibrate two
separate readings on each scale or decade that will be used to show compliance;
and
(3) conspicuously note on the
instrument the date of calibration.
B. A licensee may not use survey instruments if the difference between the indicated exposure rate and the calculated exposure rate is more than 20 percent.
C. A licensee must retain a record of each survey instrument calibration according to part 4731.4502, subpart 2.
Statutory Authority: MS s 144.1202; 144.1203
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