Nebraska Administrative Code
Topic - HEALTH AND HUMAN SERVICES SYSTEM
Title 180 - CONTROL OF RADIATION
Chapter 7 - MEDICAL USE OF RADIOACTIVE MATERIAL
Section 180-7-074 - FULL CALIBRATION MEASUREMENTS ON REMOTE AFTERLOADER UNITS

Universal Citation: 180 NE Admin Rules and Regs ch 7 ยง 074

Current through September 17, 2024

074.01 FREQUENCY. A licensee authorized to use a remote afterloader unit for medical use must perform full calibration measurements on each unit:

(A) Before the first medical use of the unit;

(B) Before medical use under the following conditions:
(i) Following replacement of the source or following reinstallation of the unit in a new location outside the facility; and

(ii) Following any repair of the unit that includes removal of the source or major repair of the components associated with the source exposure assembly;

(C) At intervals not exceeding one calendar quarter for HDR, MDR, and PDR remote afterloader units with sources whose half-life exceeds 75 days; and

(D) At intervals not exceeding one year for LDR remote afterloader units.

074.02 DETERMINANTS. To satisfy the requirement of 7-074.01, full calibration measurements must include, as applicable, determination of:

(A) The output within ± 5%;

(B) Source positioning accuracy to within ±1 millimeter;

(C) Source retraction with backup battery upon power failure;

(D) Length of the source transfer tubes;

(E) Timer accuracy and linearity over the typical range of use;

(F) Length of the applicators; and

(G) Function of the source transfer tubes, applicators, and transfer tube-applicator interfaces.

074.03 VERIFICATION OF INVENTORY AND SOURCE ARRANGEMENT. In addition to the requirements for full calibration for LDR remote afterloader units in 180 NAC 7-074.02, a licensee must perform an autoradiograph of the source or sources to verify inventory and source or sources arrangement at intervals not exceeding one calendar quarter.

074.04 USE OF DOSIMETRY SYSTEM. A licensee must use the dosimetry system described in 180 NAC 7-072.01 to measure the output.

074.05 PROTOCOLS. A licensee must make full calibration measurements required by 180 NAC 7-074.01 according to published protocols accepted by nationally recognized bodies.

074.06 SOURCE MANUFACTURER MEASUREMENTS. For LDR remote afterloader units, a licensee may use measurements provided by the source manufacturer that are made according to 180 NAC 7-074.01 through 7-074.05.

074.07 ONE PERCENT PHYSICAL DECAY. A licensee must mathematically correct the outputs determined in 180 NAC 7-074.02(A) for physical decay at intervals consistent with one percent physical decay.

074.08 FULL CALIBRATION MEASUREMENTS AND PHYSICAL DECAY CORRECTIONS. Full calibration measurements required by 180 NAC 7-074.01 and physical decay corrections required by 180 NAC 7-074.07 must be performed by the authorized medical physicist.

074.09 RECORDS. A licensee must retain a record of each calibration according to 180 NAC 7-108.

Disclaimer: These regulations may not be the most recent version. Nebraska may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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