ReACT air system on Weston Unit 3 due to be in-service on July 25

Wisconsin Public Service Corp. told the Public Service Commission of Wisconsin in an April 29 update that the ReACT emissions control system on the coal-fired Weston Unit 3 is scheduled to be in service by July 25, 2016. 

The commission had approved the project in April 2013. This July 25 in-service date date corresponds to the In‐Service milestone as identified in the ReACT System contract with Hamon Research Cottrell.  

Hamon Research Cottrell (HRC) has completed deliveries of all of the activated coke (AC) pellets it procured for the Initial Fill and for use through Minimum Performance Standards (MPS) testing to warehouses in central Wisconsin and northern Illinois, the utility added. HRC is nearly complete with the  Initial Fill of AC pellets, into ReACT and all remaining HRC warehoused AC pellet inventory is now located in central Wisconsin.

HRC will continue to transport AC pellets from the warehouse to Weston through Mechanical Completion, at which point remaining warehoused inventory will be transferred to WPS and WPS will transport the AC pellets. WPS has contracted for AC pellets for use during Guaranteed Performance Standards (GPS) seasoning and testing.

Delivery of these pellets to warehouses near Weston began in January 2016, with deliveries scheduled to continue through April 2017. These AC pellets will be transported from the warehouses to Weston as required to support ReACT operation.

WPS said that it is in the process of contracting for a supply of post‐GPS pellets. A contract for a portion of the supply has been put in place. A contract for the remaining portion of the supply is being negotiated.

WPS also said it is pursuing potential liquidated damages for submittals associated with Structural Loading Diagrams, including certified loads and locations of embeds for the ReACT Plant area and the Acid Plant area. WPS will also be pursuing potential liquidated damages associated with failure to reach Mechanical Completion by March 27, 2016.

Said the Wisconsin Public Service website: “The Weston Power Plant site, near Wausau, in central Wisconsin, is home to three fossil-fueled electric generating units that make electricity for WPS customers. Weston 4, the newest unit, is a state-of-the-art, 595-megawatt electric generator that uses clean coal technologies — making it one of the cleanest power plants of its kind in the country. Weston 4 began operating on June 30, 2008. WPS owns 70% (416.5 MW) and Dairyland Power Cooperative of La Crosse, WI owns 30% (178.5 MW). Weston Unit 3 began operating in 1981, Unit 2 in 1960 and Unit 1 in 1954. Unit 1 was retired in 2015.” The website no longer shows a MW rating for Unit 1, with Unit 2 at 65.4 MW on its new fuel, natural gas.

Said the website about the ReACT project at Unit 3: “The new system, called ReACT (Regenerative Activated Coke Technology) will significantly reduce sulfur dioxide (SO2) nitrogen oxides (NOx), mercury (Hg) and other emissions from the exhaust flow. The new system is in addition to the existing exhaust controls of the Weston 3 fabric filter (bag house installed in 2000), the low NOx burners and separated over-fire air system (installed in 2009) and the mercury control system (installed 2009). The 321-megawatt Unit 3 electric generator began operation in 1981 and is fueled by Powder River Basin (low sulfur) coal from Wyoming.”

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.