Section 216-RICR-40-20-5.11 - Calibration of Survey Instruments and Dosimetry Systems5.11.1Survey InstrumentsThe registrant must ensure that the survey instruments used to show compliance with this Part have been calibrated before first use, at intervals not to exceed twelve (12) months, and following repair.
5.11.2Calibration ProtocolsA. To satisfy the requirements of §5.11.1 of this Part, the registrant must: 1. Calibrate all required scale readings up to ten (10) mSv (one thousand (1,000) mrem) per hour with an appropriate radiation source that is traceable to the National Institute of Standards and Technology (NIST). 2. Calibrate at least two (2) points on each scale to be calibrated. These points should be at approximately one third (1/3) and two thirds (2/3) of full-scale.B. To satisfy the requirements of §5.11.2(A) of this Part, the registrant must: 1. Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than ten percent (10%).2. Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than twenty percent (20%) if a correction factor or graph is conspicuously attached to the instrument.5.11.3Record RetentionA. The registrant must retain a record of each calibration required in §5.11.1 of this Part in an auditable form for three (3) years. The record must include: 1. A description of the calibration procedure; and2. A description of the source used and the certified dose rates from the source, and the rates indicated by the instrument being calibrated, the correction factors deduced from the calibration data, the signature of the individual who performed the calibration, and the date of calibration.5.11.4Use of Calibration ServicesA. The registrant may obtain the services of individuals licensed by the Agency, the U.S. Nuclear Regulatory Commission or another Agreement State to perform calibrations of survey instruments. Records of calibrations which contain information required by §5.11.3 of this Part must be maintained in an auditable form by the registrant.B. The registrant must maintain a record of each calibration in an auditable form for the duration of the registration. The record must include: the manufacturer's name, model name, serial number, date of calibration and name of the laboratory where the calibration was performed.5.11.5Dosimetry SystemsA. The registrant must have a calibrated dosimetry system available for use. The system must have been calibrated by the National Institute for Standards and Technology (NIST) or by an American Association of Physicists in Medicine (AAPM) Accredited Dosimetry Calibration Laboratory (ADCL). The calibration must have been performed within the previous twenty-four (24) months and after any servicing that may have affected system calibration. A system may be cross-calibrated with another system that has been calibrated in accordance with this section. This cross-calibration must have been performed within the previous twelve (12) months and after each servicing that may have affected system calibration.1. The dosimetry system must have been calibrated at an energy (energy range) appropriate for the radiation being measured.2. Field sizes of less than three square centimeters by three square centimeters (3 cm x 3 cm) are considered to be small and require small volume micro-detector dosimetry systems.B. The registrant must maintain a record of each calibration in an auditable form for the duration of the registration. The record must include: the manufacturer's name, model name, serial number, date of calibration and name of the lab where the calibration was performed.216 R.I. Code R. 216-RICR-40-20-5.11
Adopted effective 1/1/2019
Amended effective 5/25/2022
Amended effective 11/27/2023