Nev. Admin. Code § 459.307 - Testing sealed sources for leakage
1. Any licensee who
possesses sealed sources shall have each sealed source containing radioactive
material tested for leakage at intervals not to exceed 6 months, unless a
longer interval is authorized by the Division, the Nuclear Regulatory
Commission or an agreement state in the Sealed Source and Device Registry
maintained by the Nuclear Regulatory Commission. In the absence of a
certificate from a transferor indicating that a test has been made within 6
months before the transfer, the sealed sources should not be used until tested,
but no leak tests are required when:
(a) The
source contains only radioactive material with a half-life of less than 30
days;
(b) The source contains only
radioactive material as a gas;
(c)
The source contains 100 microcuries (3.7 megabecquerels) or less of beta- or
gamma-emitting material or 10 microcuries (370 kilobecquerels) or less of
alpha-emitting material;
(d) The
sealed source is stored and is not being used. The sources must be tested for
leakage before any use or transfer unless they have been leak tested within 6
months before the date of use or transfer; or
(e) The source is seeds of iridium-192
encased in nylon ribbon.
2. The leak test must be capable of detecting
the presence of 0.005 microcurie (185 becquerels) of radioactive material on
the test sample. The test sample must be taken from the sealed source or from
the surfaces of the device in which the sealed source is permanently mounted or
stored on which contamination might be expected to accumulate. Records of leak
test results must be maintained for 3 years for inspection by the Division and,
for persons licensed pursuant to the provisions of this chapter for the medical
use of radioactive material, must include, without limitation:
(a) The model number and serial number, if
one has been assigned, of each sealed source tested;
(b) The identity of each source by
radionuclide and its estimated activity;
(c) The results of the test of each sealed
source;
(d) The date of the test of
each sealed source; and
(e) The
name of the person who performed each test.
3. If the leak test reveals the presence of
0.005 microcurie (185 becquerels) or more of removable contamination, or 0.001
microcurie (37 becquerels) of radon 222 in a 24-hour period if the sealed
source is a brachytherapy source manufactured to contain radium, the licensee
shall immediately inform the Radiological Health Section of the Division by
telephone, withdraw the sealed source, or the device in which it is permanently
mounted, from use and cause it to be placed in locked storage. A written report
must be filed with the Division within 5 days after the test and must include,
without limitation:
(a) A description of the
equipment involved;
(b) The model
number and serial number, if assigned, of the leaking source;
(c) The radionuclide of the leaking source
and its estimated activity;
(d) The
test results;
(e) The date of the
test; and
(f) A description of the
action taken.
Notes
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