Entergy plans MATS-inspired emissions controls for coal plants

Currently, the coal-fired White Bluff Units 1 and 2 and Independence Steam Electric Station (ISES) Units 1 and 2 are not equipped with the necessary controls to achieve Mercury and Air Toxics Standard (MATS) compliance.

That is according to Aug. 26 rebuttal testimony filed at the Arkansas Public Service Commission in a rate case from Kurtis Castleberry, Director of Resource Planning for Entergy Arkansas.

The original deadline for MATS compliance at White Bluff and ISES was April 16, 2015. However, Entergy Arkansas has secured a one-year extension until April 16, 2016, from the Arkansas Department of Environmental Quality (ADEQ) for these plants.

EAI has committed to ADEQ to install activated carbon injection and calcium bromide injection systems at each of the units at White Bluff and ISES. These controls will be operational during 2015, Castleberry noted.

The amount of the commodities needed, activated carbon and calcium bromide, needed to run these systems for MATS compliance is a function of how much electricity is generated at White Bluff and ISES in the future. Neither the amount nor the price of the commodities that will be needed in the future can be known with sufficient accuracy now to include an adjustment in base rates.

White Bluff and Indepedence are each about 1,800 MW size, with their coal primarily from the Powder River Basin in Wyoming, and they each went commercial in the early to mid 1980s.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.