The Michigan City Unit 12 flue gas desulfurization (FGD) retrofit project was successfully put into service on Dec. 15, 2015, with the facility currently undergoing commissioning, tuning and performance testing.
That is according to testimony written by Kurt W. Sangster, the Vice President, Projects and Construction Electric at Northern Indiana Public Service Co. (NIPSCO). The testimony was filed on Jan. 29 by NIPSCO with the Indiana Utility Regulatory Commission in an environmental cost recovery case.
Sangster wrote about prior FGD projects at other coal-fired units: “The Unit 14 FGD Facility Addition and Unit 14/15 FGD Common facilities were successfully put into service on November 19, 2013. The Unit 15 FGD Facility Addition was successfully put into service on November 5, 2014. For the Unit 14 FGD, the 2015 average outlet SO2 level was 0.014 #/MMBtu. For the Unit 15 FGD, the 2015 average outlet SO2 level was 0.011 #/MMBtu. Both units are operating well below the Consent Decree limit of 0.08 lb/MMBtu. The Consent Decree limit is more restrictive for SO2 than the MATS limit of 0.20 lb/MMBtu. The total cost estimate for the three components of the Schahfer FGD program has not changed ($500 million total for Unit 14 FGD, Unit 15 FGD and Unit 14/15 Common Facilities).”
Sangster also reported that the Units 7, 8, 12, 14 and 15 activated carbon injection (ACI) retrofit projects are progressing on schedule and under budget. The Units 7 and 8 ACI System was commissioned on Jan. 16, 2015. The Unit 12 ACI System is mechanically complete and commissioning is expected to occur after the Unit 12 FGD has been put into service, tuned and tested, which is projected to occur around March 31, 2016. The Unit 14 ACI System was commissioned on July 31, 2015. The Unit 15 ACI System was commissioned on May 22, 2015. NIPSCO currently expects the ACI Program to be under budget by about $6 million.
Sangster also said the Unit 7 and 8 Fuel Additive project was commissioned on Dec. 8, 2015. The Unit 12 Fuel Additive project is mechanically complete and commissioning is expected to occur after the Unit 12 FGD has been put into service, tuned and tested, which is projected to occur around March 31. The Unit 14 and Unit 15 Fuel Additive projects were commissioned on Dec. 10, 2015. The additives are chemicals applied to coal to reduce stack emissions when the coal is burned.