4730.2510 INDUSTRIAL USES OF IONIZING RADIATION PRODUCING EQUIPMENT AND NONMEDICAL ACCELERATORS.
Subpart 1. Applicability. This part establishes standards for the use of ionizing radiation producing equipment and nonmedical accelerators in industrial settings. The requirements of this part are in addition to the requirements of parts 4730.0100 to 4730.1640.
Subp. 2. Classes. Industrial facilities using ionizing radiation producing equipment and nonmedical accelerators must be classified as using either Class A, Class B, Class C, Class D, Class E, or Class F equipment. The class of the equipment must be specified by the registrant at the time of registration.
A. Class A registration is for unlimited use of industrial ionizing radiation producing equipment and nonmedical accelerators used for industrial radiography at maximum capacity in a permanent, shielded enclosure.
B. Class B registration is for time-limited use and temporary operation of industrial radiography.
C. Class C registration is for use of industrial cabinet and industrial cabinet baggage radiography.
D. Class D registration is for use of analytical ionizing radiation producing equipment.
E. Class E registration is for use of a nonmedical accelerator in a nonmedical setting.
F. Class F registration is for use of x-ray equipment or nonmedical accelerators for manufacturing processes, including curing, polymer linking, thickness measurements or coating weight, and quality control on continuously moving webs.
Subp. 3. Operating and emergency procedures. A copy of a registrant's written operating and emergency procedures must be supplied to the registrant's employees and must include:
A. methods for handling and using each source of radiation so no individual is exposed to radiation doses in excess of the limits established in parts 4730.0310 to 4730.0380;
B. methods and frequency for conducting radiation safety surveys, as required under subpart 5, item F, so radiation doses do not exceed the limits established in parts 4730.0310 to 4730.0380;
C. methods for controlling access to industrial ionizing radiation producing equipment and nonmedical accelerator areas;
D. methods and conditions for locking and securing sources of radiation;
E. methods and conditions for personnel monitoring and using personnel monitoring dosimeters under part 4730.1510, subpart 11, item C;
F. procedures and notifications that must be undertaken immediately by industrial radiography personnel when a direct reading pocket dosimeter is found to be off-scale;
G. emergency procedures for the registrant's employees to minimize exposure of individuals in the event of an accident;
H. procedures for the registrant's employees to notify the registrant in the event of an accident;
I. procedures to be followed by the registrant and the registrant's employees for notifying the commissioner and state duty officer, as required in parts 4730.1110 to 4730.1140, in the event of an accident;
J. methods for maintaining personnel monitoring records as required by subpart 12 and part 4730.1520;
K. procedures for inspecting and maintaining industrial ionizing radiation producing equipment and nonmedical accelerators; and
L. procedures for calibrating and testing radiation survey instruments and alarming ratemeters.
Subp. 4. Instruction and training. The registrant must provide a worker who operates or maintains industrial ionizing radiation producing equipment or nonmedical accelerator equipment with a copy of and instruction in the operating and emergency procedures for the industrial ionizing radiation producing equipment or nonmedical accelerator equipment used. The registrant must ensure that the worker receives and maintains training in the following areas:
A. the operating procedures for industrial ionizing radiation producing equipment or nonmedical accelerator equipment;
B. identifying radiation hazards associated with the use of industrial ionizing radiation producing equipment or a nonmedical accelerator;
C. the significance of the various radiation warning signs, safety devices, and interlocks incorporated into the equipment, or the reasons they have not been installed on a certain piece of industrial ionizing radiation producing equipment or nonmedical accelerator and the extra precautions required in such a case;
D. recognizing the symptoms of an overexposure; and
E. the procedures for reporting an actual or suspected overdose.
Subp. 5. Inspection and maintenance of equipment. The registrant must ensure that:
A. checks for defects in industrial ionizing radiation producing equipment and nonmedical accelerators are performed before each day or each shift of use;
B. industrial ionizing radiation producing equipment and nonmedical accelerators are inspected quarterly for proper functioning of warning devices, control devices, and components important to safety, in compliance with part 4730.0300, subparts 5 and 6, and the results of the inspections are recorded and maintained according to part 4730.1520, subparts 5 and 6;
C. tests of alarming ratemeters are conducted and recorded according to part 4730.0300, subpart 8;
D. equipment parts are maintained according to the manufacturer's specifications;
E. when an inspection required by this subpart reveals damage to a component critical to radiation safety or the function of the equipment, the component is removed from service and labeled as defective until repairs are made; and
F. a radiation safety survey is performed, at intervals not to exceed one year, to determine compliance with parts 4730.0310 to 4730.0380.
Subp. 6. Industrial radiation safety survey. The registrant must ensure that a radiation safety survey is performed initially and when change occurs in shielding, operation, or equipment.
Subp. 7. Calibrated and operable radiation survey instruments. The registrant must have sufficient calibrated and operable radiation survey instruments accessible to make a radiation safety survey as required by subparts 5 and 6 at each facility.
A. Each radiation survey instrument must be calibrated according to the procedures in part 4730.0300, subpart 7.
B. Records of radiation survey instrument calibrations must be maintained according to subpart 12 and part 4730.1520, subpart 5.
Subp. 8. Use logs. Each registrant must maintain use logs until the next inspection by the commissioner. For each nonmedical accelerator or piece of industrial ionizing radiation producing equipment other than Class C equipment, Class F equipment, and Class D electron microscopes that by design preclude personnel monitoring, the log must specify:
A. a serial number or other unique identification;
B. the identity of the operator assigned to the equipment;
C. the locations and dates where the equipment was used; and
D. the technique factors specifying the voltage, current, exposure time for each radiographic exposure, and number of exposures.
Subp. 9. Bypassing a safety device. The registrant must ensure that a safety device or interlock is not bypassed unless written approval has been obtained from the radiation safety officer or an alternate person designated by the radiation safety officer. The approval must be for a specified period of time. When a safety device or interlock is to be bypassed, a readily discernible sign stating "SAFETY DEVICE NOT WORKING" must be posted on the radiation source housing. A radiation safety survey must be performed after the safety device is removed.
Subp. 10. Beam stop. A device that prevents the entry of any portion of an individual's body into the primary x-ray beam path or causes the beam to be shut off when an object enters its path must be provided on all open-beam configurations. This subpart does not apply when beam alignment is being performed.
Subp. 11. Security. For radiation sources other than Class C and Class F industrial x-ray equipment and Class D electron microscopes designed to work without personnel dosimetry, the registrant must ensure that security systems are designed and used so that:
A. no operable industrial ionizing radiation producing equipment or nonmedical accelerator is left unattended unless:
(1) the industrial ionizing radiation producing equipment or nonmedical accelerator is locked in an inoperable condition; or
(2) the room or building in which the industrial ionizing radiation producing equipment or nonmedical accelerator is located is locked to prevent its use, tampering, or removal by unauthorized personnel; and
B. in a high and very high radiation area, the operator maintains direct surveillance of the operation to protect against unauthorized entry into a high or very high radiation area, unless:
(1) the high or very high radiation area is equipped with a control device or alarm system as described in part 4730.0300, subpart 5, 6, or 8; or
(2) the high or very high radiation area is locked to protect against unauthorized or accidental entry.
Subp. 12. Records. The registrant must ensure that the records in this subpart are maintained for each piece of industrial ionizing radiation producing equipment and nonmedical accelerator, except electron microscopes. A copy of the records must be kept with the operating and emergency procedures for the equipment.
A. Except as provided in item B, the following must be maintained for inspection by the commissioner until the time of the next inspection:
(1) records of the inspection and maintenance of equipment as required by subpart 5;
(2) records of industrial radiation safety surveys as required by subpart 6;
(3) records of radiation survey instrument tests and calibrations as required by subpart 7. Acceptable records include tags or labels affixed to the device or survey meter; and
(4) use logs as required by subpart 8.
B. If the results of a radiation safety survey under item A, subitem (2), are used to determine an individual's dose of radiation, the record of the radiation safety survey must be maintained according to part 4730.1520, subpart 4, item B.
C. For records at temporary jobsites, each registrant conducting industrial radiography must have available at the temporary jobsite:
(1) a copy of current registration;
(2) a copy of operating and emergency procedures;
(3) industrial radiation safety survey records as required by subpart 6;
(4) direct reading pocket dosimeter records for the period of operation at the site; and
(5) the latest instrument calibration records for instruments in use at the site.
Subp. 13. Personnel monitoring and radiation survey requirements; Class A, Class B, and Class E. The registrant must ensure that at a permanent or temporary jobsite, the personnel monitoring and radiation survey requirements specified in this subpart are met for Class A, Class B, and Class E industrial radiographic equipment.
A. In areas that require warnings as specified in part 4730.0300, subpart 1a, items A to C, there must be a current thermoluminescent dosimeter, film badge, or other whole body personnel monitoring device for each operator and all workers present.
B. For each operator, there must be a calibrated direct reading pocket dosimeter with a range of at least 0 to 200 milliroentgens (5.16 x 10-5 C/kg), and an alarming ratemeter that will alarm at an exposure of up to 500 mR/hr (1.29 x 10-4a C/kg/hr) or an alarming ratemeter that also integrates the total exposure up to 5,000 milliroentgens (1.29 x 10-3 C/kg). A hand-held portable radiation survey meter with an audible and visible readout of exposure rate or a fixed area radiation exposure rate monitor with a visible or audible alarming indicator may be substituted for the alarming ratemeter.
C. A yellow barrier rope with a purple, magenta, or black stripe and the warning signs specified in part 4730.0300, subpart 1a, items A to C, must be in place.
D. An exposure rate survey must be made after each industrial radiographic exposure to determine that the machine is "off."
STAT AUTH: MS s 144.05; 144.12; 144.121
HIST: 22 SR 314; 23 SR 1760
Current as of 10/30/03