Displaying items by tag: tva carbon

Supercomputer simulation of plasma turbulence in a spherical tokamak, which is an experimental machine designed to harness the energy of fusion.  Image courtesy of Walter Guttenfelder, Princeton Plasma Physics Laboratory and Filippo Scotti, Lawrence Livermore National Laboratory via DOE.

Fusion research, natural gas, solar power and battery improvements at heart of TVA’s plans to wean itself off coal

OAK RIDGE — The Tennessee Valley Authority is phasing out coal and announcing developments tied to other energy sources at two plants that sit on either side of Oak Ridge.

One of the options includes a fusion test site. Scientists have long pursued fusion energy, though the technology remains in infancy and has yet to generate electricity anywhere.

The TVA coal plant on Edgemoor Road in the Claxton community in Anderson County closed Dec. 1 last year. TVA remains uncommitted to any plans for most of the land around the plant. A company recently announced, however, that it plans tests connected to fusion power in a small part of one of Bull Run’s old buildings by 2028. It will be an experiment and not generate power directly.

Meanwhile, TVA plans to retire Kingston Fossil Plant on Swan Pond Road in Harriman by the end of 2027. Its nine coal-fired units power about 818,000 homes. To replace the power generated at the plant, TVA plans to build a new complex at the Kingston plant’s site, combining natural gas, solar power and battery storage.

TVA plans to retire all its coal plants by the 2030s.

The Tennessee Valley Authority’s Bob Deacy shows U.S. Department of Energy secretary Jennifer Granholm the site of a future nuclear reactor in Oak Ridge.  Ben Pounds/Tennessee Lookout

DOE chief: Little nuke plants posited to provide clean energy 

This story was originally published by Tennessee Lookout.

OAK RIDGE — U.S. Department of Energy Secretary Jennifer Granholm visited the site of a possible first-of-its-kind nuclear reactor for the Tennessee Valley Authority this week. 

The utility’s board authorized $200 million to explore building a reactor on the site last year after the Nuclear Regulatory Commission gave TVA an early site permit in 2019. 

This first-of-its-kind small modular reactor would be smaller than standard nuclear reactors and generate less power, but it could have other advantages. While typical nuclear power plants need to provide power at 100 percent of their capacity constantly, a small modular reactor can more easily increase or decrease the amount of power it provides to the overall grid. Melinda Hunter, TVA nuclear communication specialist explained that this flexibility can complement renewable plants elsewhere in the TVA grid.

“When the sun’s not shining, you can bring the power up,” she said, adding that during sunnier periods the small modular reactors can provide less power.

TVA CEO Jeff Lyash said the utility will likely start building its first reactor on the site in 2027 and finish by the early 2030s. TVA is looking to build four of these reactors on the site, but it’s not made a final decision on the first one yet. Each reactor would generate 300 megawatts. 

Warnings posted in Dickson County near Tennessee Gas Pipeline property. John Partipilo/Courtesy Tennessee Lookout

Environmental groups sue Tennessee Valley Authority over proposed new power plant

This story was originally published by Tennessee Lookout.

NASHVILLE — A trio of environmental groups filed suit against the Tennessee Valley Authority, claiming the utility violated federal law by failing to properly evaluate climate, environmental and financial impacts of a proposed new gas-fired plant in Cumberland City, Tennessee.

The lawsuit, filed in a Nashville federal court this month, also claims that TVA quietly inked a deal with an international pipeline company to supply the gas-fired plant, even as it publicly went through the motions of seeking input on alternative sources of power to replace the Cumberland Fossil Plant, its aging coal-fire facility located about 60 miles northwest of Nashville.

The groups are seeking an immediate halt to construction on the gas plant and an order forcing the utility to revise the existing environmental impact study used as the basis for moving forward with the gas-fired plant.

“Our country’s largest utility has gamed the system to fast-track dirty energy projects and that’s why we’re going to court to stop it,” Gaby Sarri-Tobar, a campaigner with the Center for Biological Diversity, said in a statement. “TVA needs to be held accountable for its reckless pursuit of a new fossil gas plant in the midst of the climate emergency.”

TVA service area and power generation assets.  Tennessee Valley Authority (TVA) | GAO-23-105375

GAO report concludes TVA is flat-footed on climate-change risks to infrastructure

This story was originally published by Tennessee Lookout.

WASHINGTON — Extreme weather patterns have sparked several improvements to the climate resiliency of Tennessee Valley Authority electrical infrastructure over the past two decades. 

A report from a government watchdog, however, found the huge utility still has work to do in mitigating climate hazards to the regional power grid. (Bitter cold around Christmas led TVA to implement rolling blackouts).

“TVA has taken several steps to manage climate-related risks,” the Jan. 30 report from the Government Accountability Office said. “However, TVA has not conducted an inventory of assets and operations vulnerable to climate change, or developed a resilience plan that identifies and prioritizes resilience measures to address specific risks.” 

One issue: The Southeast has experienced a period of accelerated warming since the 1960s. Among cities in the region, 61 percent are experiencing worsening heat waves, a percentage greater than anywhere else in the country, according to the GAO. 

The report came in response to a five-part joint request for information on the climate resiliency of U.S. infrastructure, from U.S. Senate Energy and Natural Resources Committee Chair Joe Manchin III of West Virginia and Environment and Public Works Committee Chair Tom Carper of Delaware. The two Democrats sent their request to the GAO on May 13, 2019. 

The Tennessee Valley Authority’s Cumberland Fossil Plant in Stewart County, Tennessee is leaking boron at 22 times safe levels, as well as unsafe levels of arsenic, cobalt, lithium and molybdenum, according to a recent report prepared by environmental groups using TVA’s own data. Tennessee Valley Authority

Report: TVA’s Allen Fossil Plant in Memphis ranks No. 10 in most contaminated U.S. sites

This story was originally published by Tennessee Lookout.

The Tennessee Valley Authority’s coal ash dumps in Memphis rank among the worst in the nation for contamination of groundwater with cancer-causing toxins, according to a new report that relied on the power provider’s own records.

TVA’s coal ash dumps at the now-defunct Allen Fossil Plant rank as the 10^th worst contaminated sites in the country in a report released earlier this month that examined groundwater monitoring data from coal-fired plant operators, including TVA.

TVA’s own monitoring data shows its Memphis dumps are leaking arsenic at levels nearly 300 times safe drinking water limits. Unsafe levels of boron, lead and molybdenum are also being recorded there.

The report, prepared and published by the Environmental Integrity Project (EIP) and Earthjustice, shows that coal ash dumps at every TVA coal-fired facility across Tennessee are leaking dangerous contaminants at unsafe levels, including arsenic, cobalt, lithium, molybedenum, boron, lead and sulfate, into groundwater.

A TVA ash pond at Watts Bar ruptured with disastrous consequences in December 2008.  Wikipedia 

Report contends coal plant operators are shirking responsibilities on ash cleanup

This story was originally published by Tennessee Lookout. 

NASHVILLE — In the wake of major coal ash spills from power plant containment ponds in Tennessee and into the Dan River along the North Carolina and Virginia border, the federal Environmental Protection Agency in 2015 laid out the first federal rules for managing the ash, one of the nation’s largest waste streams, and the toxins it contains.