Purdue University plans to explore advanced nuclear energy technologies in collaboration with Duke Energy to meet campus power needs.

Duke Energy won't be allowed to make its customers pay the more than $210 million needed to recoup coal-ash cleanup costs after the utility failed to follow the proper steps to recover those expenses, the Indiana Supreme Court ruled.

Indiana utility companies are preparing for severe weather. A mix of heavy snow, sleet, freezing rain and high winds will move across the state Wednesday and Thursday.

According to Duke Energy Indiana's latest 20-year plan, the utility plans to be coal free by 2035 and have about 60 percent of its generating capacity be renewables in the next two decades — that includes energy efficiency and what's called demand response.

Among other things, the coalition wants Duke Energy to retire its Gibson coal plant by 2030, stop burning coal at its Edwardsport plant and replace that energy through renewables and energy efficiency.

Duke Energy announced it will retire its Gallagher coal plant in New Albany, Indiana, more than a year early.

The state has approved Duke Energy's rate increase, but for less than half as much money as the utility had requested. The utility had asked for $395 million last July and was approved for $146 million.

Duke Energy hopes to double its renewable energy sources within five years. But it also plans to keep some coal plants running for two more decades and add natural gas pipelines.

Duke Energy wants to raise the average resident's bill by about $24 a month. The utility says that money would go to pay for everything from metering infrastructure, to helping retire some coal plants earlier.

Duke Energy in July asked the state Utility Regulatory Commission to approve a 15 percent rate increase over two years that would boost its annual revenue by about $395 million.