Design, engineering work for Sheldon Station conversion underway

October 29, 2018

Columbus, Neb.- The wheels are turning on Nebraska Public Power District’s Sheldon Station conversion project that would eliminate coal as a fuel source in one of its generating units and utilize hydrogen derived from a separate manufacturing process to generate electricity.

At the October NPPD Board of Directors meeting two agreements were approved – one to develop a preliminary boiler design and a second to assist NPPD with other engineering work required for the conversion of Sheldon Station Unit 2 boiler to burn hydrogen. Hydrogen is a by-product of the process used by Monolith Materials in manufacturing Carbon Black. Construction work on the Monolith facility, located south of Sheldon Station near Hallam, is underway.

“This is the first phase of the boiler conversion project,” said NPPD Vice President and Chief Operating Officer Tom Kent. “This initial work will lead to a solid foundation for NPPD as we progress through the process of converting the boiler. Eventually, Unit 2 will be the largest boiler in the country to burn hydrogen to generate electricity.” The second phase will deal with detailed engineering of the boiler unit with the third phase being engineering, procurement and construction of the new boiler.

Phase 1 includes preliminary boiler design, permitting technical assistance, preliminary supporting system design, consultant support, and NPPD project engineering and management.

Babcock & Wilcox, the original Sheldon Station Unit 2 boiler manufacturer, was selected to develop the Phase 1 preliminary boiler design.

Sargent & Lundy was selected to perform the Phase 1 permitting technical assistance and supporting system design for the conversion, which will include developing draft permits for the boiler unit, developing design and general arrangement drawings to allow for separate hydrogen and natural gas supply lines from the Monolith facility to Sheldon Station, and developing a preliminary cost estimate for the project.

Monolith Materials will reimburse NPPD for the costs associated with the Sheldon Station Unit 2 boiler conversion project.

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