CONTEMPORARY EQUIPMENT FOR INDUSTRIAL RADIOGRAPHY

摘要

Radiographic nondestructive testing of pipeline welds is effective because it provides documentation, rapid working, independence from power supplies, mobility, and viability in field and constructional conditions under a wide range of circumstances. Radiography is provided by gamma-ray flaw detectors of universal type with sharp-focus gamma sources (selenium 75, indium 192, and cobalt 60). VNIITFA has collaborated with Energomontazh International and the NIIAR State Scientific Center in devising and producing the general industrial RID-Se4/R gamma-ray flaw detector with sharp-focus unique selenium 75 source. Its mobility, throughput, high radiographic sensitivity (1.5%), and working safety attract users. More than 300 RID-Se4/R gamma-ray flaw detectors are in use abroad and in Russia. Figure 1 gives an external view of the radiation head and transport-loading container. It uses sealed gamma-ray sources (selenium 75) with high specific activity (800-1200 Ci/g). VNIITFA has developed a mobile gamma-ray system called the RID-K/100 with a cobalt 60 source of activity up to 100 Ci for monitoring sealed components of wall thickness up to 200 mm.