Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Morisaki, Norihiro; Hayashi, Koji; Inagaki, Yoshiyuki; Kato, Michio; Fujisaki, Katsuo*; Maeda, Yukimasa; Mizuno, Sadao*
JAERI-Tech 2005-009, 37 Pages, 2005/03
The breakage of the catalyst dust filter was found at the nozzle flange, which was welded onto the end plate of the filter, by the bubbling test using nitrogen gas of the mock-up model test facility. We investigated the cause of breakage and devised a repairing method. The cause of the breakage was the stress corrosion cracking (SCC) generated from the inside of the filter. The filter was repaired based on the following countermeasures such as reduction of condensed water in the filter, tensile stress and sensitization at welding joints. Furthermore, the inspection was carried out to investigate the structural integrity of the welding joints in the test facility of which structure, material and operating condition were similar to the filter. As the results, it was confirmed that the structural integrity was maintained.
古瀬 貴広; 雛 哲郎
鳴海 昭紀*; 盛田 和久*
【課題】加工屑を高い回収率で回収できる集塵ドリル装置を提供する。 【解決手段】ドリル本体10が、先端にドリルチップ11を有するリード部12と、リード部12に連結される連結部15と、リード部12の先端から連結部15の外周面15Aに接続される貫通孔16,17と、を有し、ドリルチップ11が、リード部12より外径が大きく構成され、密閉体20が貫通穴25と、被加工物Mに設置される設置面26と、設置面26の反対側の非設置面27と、貫通穴25と接続する連結孔28と、を有する本体21と、非設置面27に設けられ連結部15と同じ径又は小さい径の孔23Aを有し気密性を有する材質で構成された第1弾性体23と、を有し、ドリル本体10が、孔23Aを貫通して被加工物Mに当接するように構成され、連結孔28とフィルター30が気密性を保持して接続された集塵ドリル装置1を提供する。