Ringhals sets production record

Ringhals 1 nuclear power plant in Sweden set a new production record in January, an accomplishment which is being attributed to the six new custom advanced-design LP rotors installed at the plant late last year. The unit is reported to be producing more than 40 additional MW.

On March 30, 1992, Vattenfall AB chose Westinghouse Power Generation to supply and install six new advanced-design LP rotors to replace the original rotors in units 11 and 12 in Ringhals 1. An intensive engineering and manufacturing effort was required, with rotation and stationary blading manufactured at Westinghouse`s Winston-Salem facility and rotor assembly performed at the Charlotte Turbine Plant, both in the United States.

The installation was completed in 446 days on an accelerated schedule, which included significant field milling and boring to fit and assemble the replacement stationary and rotating components to the existing inner cylinders.

Units 11 and 12 were rolled with steam and synchronized to the grid on Sept. 3 and 5, 1994. Within days, both units achieved 100-percent load, with all operating parameters well within specified limits.