Current through Bulletin 2024-06, March 15, 2024
(1) The registrant shall ensure that the
survey instruments used to show compliance with R313-30 have been calibrated
before first use, at intervals not to exceed 12 months, and following
repair.
(2) To satisfy the
requirements of R313-30-8(1), the registrant shall:
(a) Calibrate required scale readings up to
10 mSv (1000 mrem) per hour with an appropriate radiation source that is
traceable to the National Institute of Standards and Technology
(NIST);
(b) Calibrate at least two
points on the scales to be calibrated. These points should be at approximately
1/3 and 2/3 of scale rating; and
(3) To satisfy the requirements of
R313-30-8(2), the registrant shall:
(a)
Consider a point as calibrated if the indicated dose rate differs from the
calculated dose rate by not more than ten percent; and
(b) Consider a point as calibrated if the
indicated dose rate differs from the calculated dose rate by not more than 20
percent if a correction factor or graph is conspicuously attached to the
instrument.
(4) The
registrant shall retain a record of calibrations required in R313-30-8(1) for
three years. The record shall include:
(a) A
description of the calibration procedure; and
(b) 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) The
registrant may obtain the services of individuals licensed by the Board, the
U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State to
perform calibrations of survey instruments. Records of calibrations which
contain information required by R313-30-8(4) shall be maintained by the
registrant.
(6) Dosimetry
Equipment.
(a) The registrant shall have a
calibrated dosimetry system available for use. The system shall have been
calibrated for 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 shall have been
performed within 24 months prior to use and after servicing that may have
affected system calibration.
(i) For beams
with energies greater than 1 MV (1 MeV), the dosimetry system shall have been
calibrated for Cobalt-60;
(ii) For
beams with energies equal to or less than 1 MV (1 MeV), the dosimetry system
shall have been calibrated at an energy or energy range appropriate for the
radiation being used.
(b) The registrant shall have available for
use a dosimetry system for quality assurance check measurements. To meet this
requirement, the system may be compared with a system that has been calibrated
in accordance with R313-30-8(6)(a). This comparison shall have been performed
within the previous 12 months (six months if the dosimetry system is an
ionization chamber) and after servicing that may have affected system
calibration. The quality assurance check system may be the same system used to
meet the requirement in R313-30-8(6)(a);
(c) The registrant shall maintain a record of
dosimetry system calibration, intercomparison, and comparison for the duration
of the license and registration. For calibrations, intercomparisons, or
comparisons, the record shall include the date, the model numbers and serial
numbers of the instruments that were calibrated, intercompared, or compared as
required by R313-30-8(6)(a) and R313-30-8(6)(b), the correction factors that
were determined, the names of the individuals who performed the calibration,
intercomparison, or comparison, and evidence that the calibration,
intercomparison, or comparison was performed by, or under the direct
supervision of, a Radiation Therapy Physicist.
