Power in Collaborative Rulemaking Processes: Writing the Rules for US Hydroelectric Project Licensing

2006 ◽  
Author(s):  
Jill M. Purdy
Keyword(s):  
Hydroelectric Project

Optimization of a Weld Overlay on a Plate Structure

2009 ◽  
Vol 132 (1) ◽  
Author(s):  
John Goldak ◽  
Mahyar Asadi ◽  
Jianguo Zhou ◽  
Stanislav Tchernov ◽  
Dan Downey
Keyword(s):  
Welding Process ◽  
Francis Turbine ◽  
Transient Temperature ◽  
Weld Repair ◽  
Weld Overlay ◽  
Hydroelectric Project ◽  
Repair Procedure ◽  
Strain Stress ◽  
Welding Direction ◽  
Interpass Temperature

An overlay weld repair procedure on a 1066.8×1066.8 mm2 square plate 25.4 mm thick was simulated to compute the 3D transient temperature, microstructure, strain, stress, and displacement of the overlay weld repair procedure. The application for the overlay was the repair of cavitation erosion damage on a large Francis turbine used in a hydroelectric project. The overlay weld consisted of a 4×6 pattern of 100×100 mm2 squares. Each square was covered by 15 weld passes. Each weld pass was 100 mm long. The total length of weld in the six squares was 36 m. The welds in each square were oriented either front-to-back or left-to-right. The welding process was shielded metal arc. The analysis shows that alternating the welding direction in each square produces the least distortion. A delay time of 950 s between the end of one weld pass and the start of the next weld pass was imposed to meet the requirement of a maximum interpass temperature to 50°C.

Design of Karadj Hydroelectric Project

1960 ◽  
Vol 86 (4) ◽  
pp. 31-50
Author(s):  
Richard D. Harza ◽  
Robert F. Edbrooke
Keyword(s):  
Hydroelectric Project

Seasonal variation in the composition of the drift below a peaking hydroelectric project

1989 ◽  
Vol 3 (1) ◽  
pp. 29-34 ◽  
Author(s):  
James B. Layzer ◽  
Timothy J. Nehus ◽  
Wendell Pennington ◽  
James A. Gore ◽  
John M. Nestler
Keyword(s):  
Seasonal Variation ◽  
Hydroelectric Project
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