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Vol.4 No.1 previous AA 39 -40-SP6(41-42-43-44)-NT 46 -47

Academic Articles
Regular Paper Vol.4No.2 (2012) p.88 - p.95
 

Method for Thinning Shape Evaluation of Elbow due to LDI and Representative Thinning Shape for Seismic Evaluation of Eroded Elbow

 
Ryo MORITA1*,Fumio INADA1, Michiya SAKAI2, Shin-ichi MATSUURA2, Shigenobu ONISHI3 and Mitsuo KUGIMOTO 3
 
1 Central Research Institute of Electric Power Industry, 2-11-1, Iwado-Kita, Komae-shi , Tokyo 201-8511, Japan
2 Central Research Institute of Electric Power Industry, 1646, Abiko, Abiko-shi, Chiba, 270-1194, Japan
3 Chubu Electric Power Company, 1, Higashi-shincho, Higashi-ku, Nagoya, Aichi, 461-8680, Japan
 
Abstract
For more realistic seismic safety evaluation of elbow with local thinning shape due to liquid droplet impingement erosion (LDI), a determination method of the thinning shape of the elbow due to LDI was developed, and a representative thinning shape for seismic evaluation of eroded elbows was proposed in this study. For the mechanistically-based determination of the thinning shape due to LDI, calculations of the droplet behavior and the thinning rate of the elbow were conducted. In addition, with this approach, the thinning shapes in various flow and piping size conditions were evaluated, and the enveloping thinning shape of those thinning shapes with a safety factor is considered as a representative thinning shape for seismic evaluation of eroded elbows.
 
Keywords
Liquid droplet impingement erosion, Seismic evaluation, Thinning shape
 
Full Paper: PDF EJAM Vol.4No. 2 pp.88-95 "Method for Thinning Shape Evaluation of Elbow due to LDI and Representative Thinning Shape for Seismic Evaluation of Eroded Elbow
Article Information
Article history:
Received 3 April 2012
Accepted 9 July 2012