105 CMR 120.314 - Radiation Survey Instruments
(A) The
licensee or registrant shall maintain sufficient calibrated and operable
radiation survey instruments to make physical radiation surveys as required by
105
CMR 120.300 and
120.225(A).
Instrumentation required by
105
CMR 120.300 shall have a range from 0.02
mSv/hr (2 mrem/hr) through 0.01 Sv/hr (1 rem/hr).
(B) Each radiation survey instrument shall be
calibrated:
(1) By a person licensed or
registered by the Agency, another Agreement State, a Licensing State, or the
U.S. Nuclear Regulatory Commission to perform such service;
(2) At energies appropriate for the
licensee's or registrant's use;
(3)
At intervals not to exceed six months and after each instrument servicing other
than battery replacement;
(4) To
demonstrate an accuracy within plus or minus 20%; and
(5) At two points located approximately a and
b of full-scale on each scale for linear scale instruments; at midrange of each
decade, and at two points of at least one decade for logarithmic scale
instruments; and for digital instruments, at three points between 0.02 and 10
mSv/hr (2 and 1,000 mrem/hr).
(C) Records of these calibrations shall be
maintained for Agency inspection for five years after the calibration
date.
(D) Each radiation survey
instrument shall be checked with a radiation source at the beginning of each
day of use and at the beginning of each work shift to ensure it is operating
properly.
Notes
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