In the undergrounding pipe-space, there are many pipes for utility (electronic cable, water, gas, steam, etc.). These pipes are kept to safe by daily inspect ion. But hot environment of the pipe-space affects badly the device and a labor er's health.The investigation of the heat distribution was carried on, therefor e it was found that the radiant heat around the valve was very much. The method of thermal insulation was examined from the view point of the shape, cost, and effect. Then some of valves were ...
英字タイトル:
The activities for improvement of hot environment in undergrounding pipe-space(trench)(1)The decrease of the radiant heat from steam pipe

There are 4-boiler in nuclear fuel cycle engineering laboratories( NCL). These boilers have been operated in the long term over 20 years. One of them, the leakage of boiler water was found at one of the generating tubes, and 2 adjoining generating tubes were corroded in Dec, 2011. These generating tubes were investigated by immersion ultrasonic testing (UT) for measure thickness of the tube. As a result, thinner tube was found in a part of a bend and near the water drum. These parts are covered with s...
英字タイトル:
Maintenance of immersion ultrasonic testing on the water tube boiler