Replacing a Sheared Wicket Gate

摘要

A wicket gate stem on Unit 1 at Holyoke Gas & Electric's 30-MW Hadley plant sheared in two in January 2007. The utility quickly commissioned design and fabrication of a replacement gate. To avoid dismantling the unit to install the new gate, a contractor cut the new gate into thirds horizontally, installed it in the unit, and welded it back together. The unit has operated problem-free since the new gate was installed in May 2007.