Current through Register Vol. 24-18, September 15, 2024
Equipment used in industrial radiography operations must
meet the following minimum criteria:
(1)
(a)
Each radiographic exposure device, source assembly or sealed source, and all
associated equipment must meet the requirements specified in American National
Standards Institute, N432-1980 "
Radiological Safety for the Design and
Construction of Apparatus for Gamma Radiography," (published as NBS
Handbook 136, issued January 1981). This publication may be purchased from
American National Standards Institute, Inc., 25 West 43rd Street, New York, New
York, 10036; telephone: 212-642-4900. Copies of the document are available for
inspection at the Department of Health, Office of Radiation Protection,
Olympia, Washington. A copy of the document is also on file at the National
Archives and Records Administration. For information on the availability of
this material at the National Archives and Records Administration call
202-741-6030, or go to:
http://www.archives.gov/federal_register/code_of_federal
regulations/ibr_locations.html.
(b) Engineering analysis may be submitted by
an applicant or licensee to demonstrate the applicability of previously
performed testing on similar individual radiography equipment components. Upon
review, the department may find this an acceptable alternative to actual
testing of the component pursuant to the above referenced standard.
(c) Notwithstanding (a) of this subsection,
equipment used in industrial radiographic operations need not comply with
§ 8.9.2(c) of the Endurance Test in American National Standards Institute
N432-1980, if the prototype equipment has been tested using a torque value
representative of the torque that an individual using the radiography equipment
can realistically exert on the lever or crankshaft of the drive mechanism.
(2) In addition to the
requirements specified in subsection (1) of this section, the following
requirements apply to radiographic exposure devices, source changers, source
assemblies and sealed sources.
(a) The
licensee shall ensure that each radiographic exposure device has attached to it
a durable, legible, clearly visible label bearing the:
(i) Chemical symbol and mass number of the
radionuclide in the device;
(ii)
Activity and the date on which this activity was last measured;
(iii) Model (or product code) and serial
number of the sealed source;
(iv)
Manufacturer's identity of the sealed source; and
(v) Licensee's name, address, and telephone
number.
(b) Radiographic
exposure devices intended for use as Type B transport containers must meet the
applicable requirements of 10 C.F.R. Part 71.
(c) Modification of radiographic exposure
devices, source changers, and source assemblies and associated equipment is
prohibited, unless the design of any replacement component, including source
holder, source assembly, controls or guide tubes would not compromise the
design safety features of the system.
(3) In addition to the requirements specified
in subsections (1) and (2) of this section, the following requirements apply to
radiographic exposure devices, source assemblies, and associated equipment that
allow the source to be moved out of the device for radiographic operations or
to source changers.
(a) The coupling between
the source assembly and the control cable must be designed in such a manner
that the source assembly will not become disconnected if cranked outside the
guide tube. The coupling must be such that it cannot be unintentionally
disconnected under normal and reasonably foreseeable abnormal
conditions.
(b) The device must
automatically secure the source assembly when it is cranked back into the fully
shielded position within the device. The securing system may only be released
by means of a deliberate operation on the exposure device.
(c) The outlet fittings, lock box, and drive
cable fitting on each radiographic exposure device must be equipped with safety
plugs or covers which must be installed during storage and transportation to
protect the source assembly from water, mud, sand, or other foreign
matter.
(d)
(i) Each sealed source or source assembly
must have attached to it or engraved on it, a durable, legible, visible label
with the words: "DANGER-RADIOACTIVE."
(ii) The label may not interfere with the
safe operation of the exposure device or associated equipment.
(e) The guide tube must be able to
withstand a crushing test that closely approximates the crushing forces that
are likely to be encountered during use, and be able to withstand a kinking
resistance test that closely approximates the kinking forces likely to be
encountered during use.
(f) Guide
tubes must be used when moving the source out of the device.
(g) An exposure head or similar device
designed to prevent the source assembly from passing out of the end of the
guide tube must be attached to the outermost end of the guide tube during
radiographic operations.
(h) The
guide tube exposure head connection must be able to withstand the tensile test
for control units specified in ANSI N432-1980.
(i) Source changers must provide a system for
ensuring that the source will not be accidentally withdrawn from the changer
when connecting or disconnecting the drive cable to or from a source
assembly.
(4) All
radiographic exposure devices and associated equipment in use after January 1,
1998, must comply with the requirements of this section.
(5) The maximum exposure rate limits for
storage containers and source changers with the sealed source in the shielded
position are:
(a) 2 millisieverts (200
millirem) per hour at any exterior surface; and
(b) 0.1 millisieverts (10 millirem) per hour
at one meter from any exterior surface.
Statutory Authority:
RCW
70.98.050. 99-05-012, § 246-243-040,
filed 2/5/99, effective 3/8/99; 94-01-073, § 246-243-040, filed 12/9/93,
effective 1/9/94. Statutory Authority:
RCW
43.70.040. 91-02-049 (Order 121), recodified
as § 246-243-040, filed 12/27/90, effective 1/31/91. Statutory Authority:
RCW
70.98.050. 81-01-011 (Order 1570), §
402-36-030, filed 12/8/80; Order 1084, § 402-36-030, filed 1/14/76; Order
1, § 402-36-030, filed 1/8/69; Rules (part), filed
10/26/66.
