Safety Equipment & Systems – Edward W Clark Generating Station

Emergency retrieval access for W501B turbine No. 5 bearing tunnel

Edward W Clark Generating Station 
NV Energy

Challenge.  The plant operates four W501B combustion turbines. Access to the No. 5 bearing tunnel is limited and it is impossible to retrieve someone without completely removing the roof which requires considerable effort—including disconnecting electrical wiring and performing lifts with the overhead crane.

Solution.This issue was finally resolved by the plant’s safety committee by installing a hatch door on the roof where an emergency retrieval tripod could be setup rather than performing a complete roof removal (Fig 12). Hand rails were also installed to facilitate safe retrieval of personnel.

Results. This retrieval process was tested and validated by qualified confined-space rescue teams for effectiveness.