Close Proximity Radiography is similar to Gamma radiography with the exception that the demarcated exclusion areas are considerably less. With the use of a special source container and additional shielding, the safe barrier distance can be reduced to as much as no more than 2.5 metres from the point of the exposed source during operations. This can be very beneficial when having to perform radiography on sites that have equipment that are sensitive to the presence of outside sources of ionising radiation, such as level switches. It grants planners greater freedom with other activities that would normally be affected by this method of inspection due to the substantially smaller demarcated areas required. This is especially effective during Turnarounds and Shutdowns whereby radiography can be carried out 24 hours of the day without interfering or stopping of any other surrounding work.
