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Nondestructive Testing of Jet-Engines by Using 192Ir

1969; Atomic Energy Society of Japan; Volume: 11; Issue: 7 Linguagem: Inglês

10.3327/jaesj.11.419

2186-5256

Masatoshi Kobayashi, Shigemasa ENOMOTO, Sho Maeda, Yoshiro MATSUO,

Nuclear and radioactivity studies

The Japan Atomic Energy Research lnstitute and the Japan Air Lines Co. have undertaken in cooperation a series of nondestructive tests on jet-engines using 10Ci of 192lr. To examine the possibility of applying this method in actual practice, detailed test programs were prepared in advance for trials on two types of engine for jet-planes-Boeing 727 (JT-3D engine) and Douglas DC-8 (JT-8D engine).With the engine cover removed, a steel guide tube was inserted into the hollow turbine shaft, and the radioactive source was positioned in the predetermined point along the guide tube. An X-ray film of fine grain and high sensitivity was placed in a flexible holder with lead screen, and set over the surface of the jet-engine. After each exposure, the radiographic image was examined for detection sensitivity.The trials proved to fulfill most of the expectations of the proposed method, and effective detection was promised of anomalies in such components as compressor blades and guide vanes, combustion chamber lining, as well as turbine blades and vanes. The airline company deuded to adopt the method in their routine operations.