@jen3700, organizer of the Pittsburgh TweetUp HeatUp, looks on as @texburgher gets LOLs.

Hanford Vit Plant crews made history by initiating Melter 2 heatup. Jackbolts are compression bolts within a melter that must be adjusted, loosened, and tightened throughout heatup to keep gaps between refractory blocks closed.

Hanford Vit Plant crews made history by initiating Melter 2 heatup. Jackbolts are compression bolts within a melter that must be adjusted, loosened, and tightened throughout heatup to keep gaps between refractory blocks closed.

Hanford Vit Plant crews made history by initiating Melter 2 heatup. The melter will reach 2,100 degrees F.