T.O. 33B-1-1l.When entering the area after inactivation of the radiation source, radiographers shall use a suitablecalibrated survey meter to assure that the source has returned to its ‘‘off’’ position or that X-rays areno longer being produced.6.9.18.3.3OperatingProcedures.The following are minimum mandatory requirements that must be adhered to when performing radiographicinspection operations in ‘‘unshielded’’ areas:6.9.18.3.3.1General.Industrial X-ray or sealed gamma-ray sources will be used in unshielded areas by only qualified radi-ographers and with written approval of the Radiation Safety Officer. (Devices generating ‘‘Very HighRadiation’’ areas shall not be used in unshielded areas without prior written approval from the applicableMAJCOM Headquarters.)6.9.18.3.3.2Equipment.In addition to the radiation producing equipment the following equipment must be readily available for use atthe site selected for radiographic purposes.a.At least two serviceable, properly calibrated, radiation survey meters authorized for use with X-ray orgamma radiography operations. One instrument shall be placed by the operator’s console and otherutilized for surveys of the perimeter as appropriate. Each radiation survey meter shall be checked foracceptable response to radiation using the provided check source prior to the first operation of the dayor shift, and after suspected damage such as would occur if dropped.b.A minimum of one pocket dosimeter and/or one personal alarming dosimeter, and one TLD badge foreach radiographer involved in the radiography operations.c.An interlock assembly designed to prevent irradiation unless a properly functioning warning light isconnected in the circuit.d.At least two 250-foot coils of rope with sufficient supporting stands (recommended).e.Radiation warning signs: sufficient quantity of each required type, i.e., ‘‘Caution, Radiation Area’’ andCaution, or ‘‘Danger’’ ‘‘High Radiation Area’’ and ‘‘Danger, Very High Radiation Area.’’f.For X-ray equipment, at least 75 feet of power cable and coolant hose; or as recommended by theequipment manufacturer.g.A rotating/f lashing strobe-type (blinking, low intensity, warning lights shall not be used) red lightand a radiation warning sign stating ‘‘X-ray ON’’ (or ‘‘SHUTTER OPEN’’ for gamma radiography),when the light is lit. The sign shall be as close to the radiation source as possible and still be visiblefrom all angles of approach, and shall be connected to the control circuit in such a manner that thesign is ON when the radiation source is activated.h.For night radiographic operations, sufficient lighting equipment to illuminate the area.i.A minimum of 500 feet (150 meters) of commercially available barrier material which states‘‘CAUTION RADIATION AREA’’ (bright yellow background with magenta letters and radiationsymbol) and self supporting stands may be used to cordon off the affected area.6.9.18.3.3.3RestrictedArea.Radiographic operations in unshielded facilities require an initial evaluation of the exposure area todetermine the bounds of the area to be restricted during exposure.a.A restricted area means any area to which access is controlled by the individual in charge of radiationprotection for the purpose of protection of individuals from exposure to radiation and radioactivematerials. This implies that a restricted area is one that requires control of access, occupancy andworking conditions for radiation protection purposes.Change 26-149
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
