Electricity Generation and Delivery

Marquette University will enable an innovative combustion technology for lean-burn (high air-fuel ratio) natural gas engines to potentially reduce the amount of methane slip—or methane in the inlet fuel stream that escapes to the atmosphere—to 0.25% of the inlet fuel stream. The 0.25% target would represent a 90% reduction from current levels. The proposed system aims to achieve a non-premixed, mixing-controlled combustion process with natural gas in a lean-burn engine through an actively fueled prechamber.

The University of Minnesota will develop a non-thermal, low-temperature, plasma-assisted system for (1) in-situ flare gas reforming, (2) ignition, and (3) flame stabilization for small, unmanned pipe flares. Flares safely dispose of waste gases by burning them under controlled conditions. The new system will substantially enhance fuel reactivity by producing intermediate species such as ethylene, acetylene, and hydrogen. These hydrocarbons are highly reactive compared with methane and dramatically increase flare efficiency.

General Electric (GE) Gas Power will study high-velocity lifted-flame reheat combustion within the turbine section as a high-risk, high-payoff technology to achieve high-efficiency gas turbine operation with nearly pure hydrogen (H2) fuels. GE is proposing a novel approach to H2 jet injection into the main flow path in the hot gas path section to evaluate the commercial attractiveness of this approach in land-based gas turbines.

Argonne National Laboratory (ANL) and Oklo will develop crucial technologies in researching pyroprocessing for advanced fast reactor fuels. Pyroprocessing involves the use of high-temperature molten salts to enable the recycling and reuse of valuable nuclear materials from used fuel. Recycling improves the utilization of nuclear resources, generates less nuclear waste, and reduces the cost of fuel. The ANL team will develop a system to improve the safeguarding, security, and operations of future fuel reprocessing plants to support this outcome.

Argonne National Laboratory (ANL) and other national laboratories and universities will develop a transformational technology for LLFP transmutation using energetic photons and protons. For instance, long-lived isotope I-129 (half-life of 15.7 million years) can be transmuted to short-lived isotope I-128 (half-life of 25 minutes). A high transmutation performance can be achieved by multiple transmutations in the arrangement of the LLFP target surrounded by an LLFP blanket.

To use EGS as an unlimited renewable energy source, Eden will develop a new class of hydraulic fracturing methods to create fluid pathways for water to be heated and extracted for power production. Eden’s new “Electro-Hydraulic Fracturing” (E-HF) technology will use electricity and water to access a more extensive fracture network for heat recovery. This E-HF process will increase the heat transfer surface area for the water circulating through fractures, improving EGS power plant efficiency up to 500%.

To create energy storage that addresses Li-ion limitations, the project team has identified an unlikely source: inactive upstream oil and gas (O&G) wells. NREL will repurpose inactive O&G wells to create long-term, inexpensive energy storage. Team member Renewell Energy has invented a method of underground energy storage called Gravity Wells that will give a second life to ~$4 trillion worth of inactive upstream O&G infrastructure and result in the sealing of hundreds of thousands of idle O&G wells currently emitting methane.

Idaho National Laboratory (INL) will develop a thermal treatment process for extracting metallic actinides as a group and separating active fission products from used metal fuels. The INL team will leverage the anticipated formation of immiscible (unmixable) liquid layers and subsequent precipitation of solid phases upon cooling to improve the purity of resulting products at a potentially lower cost. A traveling molten zone system will rapidly extract actinides from used metallic fuels.

Stony Brook University aims to significantly reduce compact reactor waste via improved fuel utilization and reduced uranium loading. The team’s solution is a novel microencapsulated fuel form leveraging halide salt sintering of magnesium oxide (MgO), developed under ARPA-E’s MEITNER program to enable advanced moderator technologies with enhanced neutronic performance and temperature stability as a replacement for graphite.

Rutgers University aims to develop and demonstrate PACE-FORWARD, a high-density, durable cermet waste form (WF) suitable to immobilize all forms of AR wastes, significantly reducing processing complexity. The proposed WF will exhibit high waste loading (≥70% by volume) and immobilize multiple waste streams, including metal, salt (halide), and oxides from molten salt fueled or metallic fueled reactors; or metal and carbon-14/carbide waste from reprocessing of tri-structural isotropic fuel particles.