Several PJM utilities released their fourth quarter earnings last week, but none made news like Exelon, which warned that it may shut down some of its nuclear generating stations if they can't compete against subsidized renewable generators and stubbornly low natural gas prices.

News briefs on companies in PJM Interconnection: Constellation, PPL, PSEG, and UGI.

News briefs from the states within the PJM footprint. This week we include Delaware, Kentucky, Maryland, North Carolina, Ohio, and Pennsylvania.

News briefs from the states within the PJM footprint. This week we include Kentucky, Maryland, New Jersey, Ohio, Pennsylvania, and Virginia.

News briefs on companies in PJM Interconnection: AEP, ComEd, Pepco and PPL.

State briefs from around PJM's territory. Included this week are Kentucky, Maryland, New Jersey, North Carolina, Ohio, Pennsylvania, and Virginia.

State briefs from around PJM's territory. Included this week are Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, and West Virginia.

News briefs on companies in PJM Interconnection: Constellation NewEnergy, FirstEnergy, Duke, PPL and TVA.

State briefs from around PJM's territory. Included this week are Illinois, Kentucky, North Carolina, Ohio, Pennsylvania, and West Virginia.

Facing continued skepticism from Wall Street, Exelon Corp. says it will begin shutting down unprofitable power plants if energy prices don't rebound within a year.