TXR 325M - Maximum Permissible Dose (MPD); Radiation Protection; Adverse Effects from Material Located in the X-Ray Beam

Standard Frequency Series Generators
Operation
6
M-2008-7-14
2.3 MAXIMUM PERMISSIBLE DOSE (MPD)
Beforeoperation, persons qualiedand authorized to operatethis equipment shouldbefamiliar with the
Recommendations of the International Commission on Radiological Protection, contained in Annals Number
60 of the ICRP, with applicable National Standards, and should have been trained in use of the equipment.
For occupational exposures, the ICRP recommends that the MPD accumulated should not exceed the
following limits:
•Annualeffectivedose ....................................... 50 mSv
•Annualdoseforthelensoftheeye .................. 150 mSv
•Annualdoseforallotherareas ........................500 mSv
(i.e. red bone marrow, breast, lung,
Gonads, skin and extremeties)
Theselimits arenoteasytodeneandfrom timetotime mustbeupdatedasnewinformationbecomes
available.
2.4 RADIATION PROTECTION
Because exposure to X-ray radiation may be damaging to health, use great care to provide protection against
exposure to the primary beam. Some of the effects of X-ray radiation are cumulative and may extend over a
period of months or years. The best safety rule for X-ray operator is “Avoid exposure to the primary beam at
all times”.
2.4.1 ADVERSE AFFECTS FROM MATERIALS LOCATED IN THE X-RAY BEAM
Any object in the path of the primary beam produces secondary (scattered) radiation. The intensity of the
secondary radiation depends upon the energy and intensity of the primary beam and the atomic number for
the object material struck by the primary beam. Secondary radiation may be of greater intensity than that of
theradiationreachingthelm.Takeprotectivemeasurestosafeguardagainstit.
An effective protective measure is the use of lead shielding. To minimize dangerous exposure, use such items
as lead screens, lead impregnated gloves, aprons, thyroid collars, etc. The lead screen should contain a
minimum of 2.0 mm of lead or equivalent and personal protective devices (aprons, gloves, etc.) must contain
aminimumof0.25mmofleadorequivalent.Forconrmationofthelocalrequirementsatyoursite,please
refer to your “Local Radiation Protection Rules” as provided by your Radiation Protection Advisor.
WHILE OPERATING OR SERVICING X-RAY EQUIPMENT, ALWAYS
KEEP A DISTANCE OF NOT LESS THAN 45 CENTIMETERS FROM
THE FOCAL SPOT AND X-RAY BEAM, PROTECT BODY AND DO
NOT EXPOSE HANDS, WRISTS, ARMS OR OTHER PARTS OF THE
BODY TO THE PRIMARY BEAM.