India sets year-end deadline for blueprint on tackling global warming

Ottawa Sewage Energy Exchange System uses wastewater heat recovery and efficient heat pumps to deliver renewable district energy, zero carbon heating and cooling, cutting greenhouse gas emissions at LeBreton Flats and scaling urban developments.

Key Points

A district energy system recovering wastewater heat via pumps to deliver zero carbon heating and cooling.

✅ Delivers 9 MW heating and cooling for 2.4M sq ft at LeBreton Flats

✅ Cuts 5,066 tonnes CO2e each year, reducing greenhouse gases

✅ Powers Odenak zero carbon housing via district energy

Ottawa is embarking on a groundbreaking initiative to harness the latent thermal energy within its wastewater system, in tandem with advances in energy storage in Ontario that strengthen grid resilience, marking a significant stride toward sustainable urban development. The Sewage Energy Exchange System (SEES) project, a collaborative effort led by the LeBreton Community Utility Partnership—which includes Envari Holding Inc. (a subsidiary of Hydro Ottawa) and Theia Partners—aims to revolutionize how the city powers its buildings.

Harnessing Wastewater for Sustainable Energy

The SEES will utilize advanced heat pump technology to extract thermal energy from the city's wastewater infrastructure, providing both heating and cooling to buildings within the LeBreton Flats redevelopment. This innovative approach eliminates the need for fossil fuels, aligning with Ottawa's commitment to reducing greenhouse gas emissions and promoting clean energy solutions across the province, including the Hydrogen Innovation Fund that supports new low-carbon pathways.

The system operates by diverting sewage from the municipal collection network into an external well, where it undergoes filtration to remove large solids. The filtered water is then passed through a heat exchanger, transferring thermal energy to the building's heating and cooling systems. After the energy is extracted, the treated water is safely returned to the city's sewer system.

Environmental and Economic Impact

Once fully implemented, the SEES is projected to deliver over 9 megawatts of heating and cooling capacity, servicing approximately 2.4 million square feet of development. This capacity is expected to reduce greenhouse gas emissions by approximately 5,066 tonnes annually—equivalent to the electricity consumption of over 3,300 homes for a year. Such reductions are pivotal in helping Ottawa meet its ambitious goal of achieving a 96% reduction in community-wide greenhouse gas emissions by 2040, as outlined in its Climate Change Master Plan and Energy Evolution strategy, and they align with Ontario's plan to rely on battery storage to meet rising demand across the grid.

Integration with the Odenak Development

The first phase of the SEES will support the Odenak development, a mixed-use project comprising two high-rise residential buildings. This development is poised to be Canada's largest residential zero-carbon project, echoing calls for Northern Ontario grid sustainability from community groups, featuring 601 housing units, with 41% designated as affordable housing. The integration of the SEES will ensure that Odenak operates entirely on renewable energy, setting a benchmark for future urban developments.

Broader Implications and Future Expansion

The SEES project is not just a localized initiative; it represents a scalable model for sustainable urban energy solutions that aligns with green energy investments in British Columbia and other jurisdictions. The LeBreton Community Utility Partnership is in discussions with the National Capital Commission to explore extending the SEES network to additional parcels within the LeBreton Flats redevelopment. Expanding the system could lead to economies of scale, further reducing costs and enhancing the environmental benefits.

Ottawa's venture into wastewater-based energy systems places it at the forefront of a growing trend in North America. Cities like Toronto and Vancouver have initiated similar projects, while related pilots such as the EV-to-grid pilot in Nova Scotia highlight complementary approaches, and European counterparts have long utilized sewage heat recovery systems. Ottawa's adoption of this technology underscores its commitment to innovation and sustainability in urban planning.

The SEES project at LeBreton Flats exemplifies how cities can repurpose existing infrastructure to create sustainable, low-carbon energy solutions. By transforming wastewater into a valuable energy resource, Ottawa is setting a precedent for environmentally responsible urban development. As the city moves forward with this initiative, it not only addresses immediate energy needs but also contributes to a cleaner, more sustainable future for its residents, even as the province accelerates Ontario's energy storage push to maintain reliability.

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Houston Power Outage Heatwave intensifies a prolonged blackout, straining the grid and infrastructure resilience; emergency response, cooling centers, and power restoration efforts race to protect vulnerable residents amid extreme temperatures and climate risks.

Key Points

A multi-day blackout and heatwave straining Houston's grid, limiting cooling, and prompting emergency response.

✅ Fourth day without power amid dangerous heat

✅ Grid failures expose infrastructure vulnerabilities

✅ Cooling centers, aid groups support vulnerable residents

Houston is enduring significant frustration and hardship as a power outage stretches into its fourth day amid a sweltering heatwave. The extended blackout has exacerbated the challenges faced by residents in one of the nation’s largest and most dynamic cities, underscoring the critical need for reliable infrastructure and effective emergency response systems.

The power outage began early in the week, coinciding with a severe heatwave that has driven temperatures to dangerous levels. With the city experiencing some of the highest temperatures of the year, the lack of electricity has left residents without essential cooling, contributing to widespread discomfort and health risks. The heatwave has placed an added strain on Houston's already overburdened power grid, which has struggled to cope with the soaring demand for air conditioning and cooling.

The prolonged outage has led to escalating frustration among residents. Many households are grappling with sweltering indoor temperatures, leading to uncomfortable living conditions and concerns about the impact on vulnerable populations, including the elderly, young children, and individuals with pre-existing health conditions. The lack of power has also disrupted daily routines, as morning routine disruptions in London demonstrate, including access to refrigeration for food, which has led to spoilage and further complications.

Emergency services and utility companies have been working around the clock to restore power, but progress has been slow, echoing how Texas utilities struggled to restore power during Hurricane Harvey, as crews contended with access constraints. The complexity of the situation, combined with the high demand for repairs and the challenging weather conditions, has made it difficult to address the widespread outages efficiently. As the days pass, the situation has become increasingly dire, with residents growing more impatient and anxious about when they might see a resolution.

Local officials and utility providers have been actively communicating with the public, providing updates on the status of repairs and efforts to restore power. However, the communication has not always been timely or clear, leading to further frustration among those affected. The sense of uncertainty and lack of reliable information has compounded the difficulties faced by residents, who are left to manage the impacts of the outage with limited guidance.

The situation has also raised questions about the resilience of Houston’s power infrastructure. The outage has highlighted vulnerabilities in the city's energy grid, similar to how a recent windstorm caused significant outages elsewhere, which has faced previous challenges but has not experienced an extended failure of this magnitude in recent years. The inability of the grid to withstand the extreme heat and maintain service during a critical time underscores the need for infrastructure improvements and upgrades to better handle similar situations in the future.

In response to the crisis, community organizations and local businesses have stepped up to provide support to those in need, much like Toronto's cleanup after severe flooding mobilized volunteers and services, in order to aid affected residents. Cooling centers have been established to offer relief from the heat, providing a respite for individuals who are struggling to stay cool at home. Additionally, local food banks and charitable organizations are distributing essential supplies to those affected by food spoilage and other challenges caused by the power outage.

The power outage and heatwave have also sparked broader discussions about climate resilience and preparedness. Extreme weather events and prolonged heatwaves are becoming increasingly common due to climate change, as strong winds knocked out power across the Miami Valley recently, raising concerns about how cities and infrastructure systems can adapt to these new realities. The current situation in Houston serves as a stark reminder of the importance of investing in resilient infrastructure and developing comprehensive emergency response plans to mitigate the impacts of such events.

As the outage continues, there is a growing call for improved strategies to manage power grid failures, with examples like the North Seattle outage affecting 13,000 underscoring the need, and better support for residents during crises. Advocates are urging for a reevaluation of emergency response protocols, increased investment in infrastructure upgrades, and enhanced communication systems to ensure that the public receives timely and accurate information during emergencies.

In summary, Houston's power outage, now extending into its fourth day amid extreme heat, has caused significant frustration and hardship for residents. The prolonged disruption has underscored the need for more resilient energy infrastructure, as seen when power outages persisted for hundreds in Toronto, and effective emergency response measures. With temperatures soaring and the situation continuing to unfold, the city faces a critical challenge in restoring power, managing the impacts on its residents, and preparing for future emergencies. The crisis highlights broader issues related to infrastructure resilience and climate adaptation, emphasizing the need for comprehensive strategies to address and mitigate the effects of extreme weather events.

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US power grid modernization addresses aging infrastructure, climate resilience, extreme weather, EV demand, and clean energy integration, using AI, transmission upgrades, and resilient substations to improve reliability, reduce outages, and enable rapid recovery.

Key Points

US power grid modernization strengthens infrastructure for resilience, reliability, and clean energy under rising demand.

✅ Hardening substations, lines, and transformers against extreme weather

✅ Integrating EV load, DERs, and renewables into transmission and distribution

✅ Using AI, sensors, and automation to cut outages and speed restoration

The power grid in the U.S. is aging and already struggling to meet current demand, with dangerous vulnerabilities documented across the system today. It faces a future with more people — people who drive more electric cars and heat homes with more electric furnaces.

Alice Hill says that's not even the biggest problem the country's electricity infrastructure faces.

"Everything that we've built, including the electric grid, assumed a stable climate," she says. "It looked to the extremes of the past — how high the seas got, how high the winds got, the heat."

Hill is an energy and environment expert at the Council on Foreign Relations. She served on the National Security Council staff during the Obama administration, where she led the effort to develop climate resilience. She says past weather extremes can no longer safely guide future electricity planning.

"It's a little like we're building the plane as we're flying because the climate is changing right now, and it's picking up speed as it changes," Hill says.

The newly passed infrastructure package dedicates billions of dollars to updating the energy grid with smarter electricity infrastructure programs that aim to modernize operations. Hill says utility companies and public planners around the country are already having to adapt. She points to the storm surge of Hurricane Sandy in 2012.

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"They thought the maximum would be 12 feet," she says. "That storm surge came in close to 14 feet. It overcame the barriers at the tip of Manhattan, and then the electric grid — a substation blew out. The city that never sleeps [was] plunged into darkness."

Hill noted that Con Edison, the utility company providing New York City with energy, responded with upgrades to its grid: It buried power lines, introduced artificial intelligence, upgraded software to detect failures. But upgrading the way humans assess risk, she says, is harder.

"What happens is that some people tend to think, well, that last storm that we just had, that'll be the worst, right?" Hill says. "No, there is a worse storm ahead. And then, probably, that will be exceeded."

In 2021, the U.S. saw electricity outages for millions of people as a result of historic winter storms in Texas, a heatwave in the Pacific Northwest and Hurricane Ida along the Gulf Coast. Climate change will only make extreme weather more likely and more intense, driving longer, more frequent outages for utilities and customers.

In the West, California's grid reliability remains under scrutiny as the state navigates an ambitious clean energy shift.

And that has forced utility companies and other entities to grapple with the question: How can we prepare for blackouts and broader system stress we've never experienced before?

A modern power station in Maryland is built for the future
In the town of Edgemere, Md., the Fitzell substation of Baltimore Gas and Electric delivers electricity to homes and businesses. The facility is only a year or so old, and Laura Wright, the director of transmission and substation engineering, says it's been built with the future in mind.

She says the four transformers on site are plenty for now. And to counter the anticipated demand of population growth and a future reliance on electric cars, she says the substation has been designed for an easy upgrade.

"They're not projecting to need that additional capacity for a while, but we designed this station to be able to take that transformer out and put in a larger one," Wright says.

Slopes were designed to insulate the substation from sea level rise. And should the substation experience something like a catastrophic flooding event or deadly tornado, there's a plan for that too.

"If we were to have a failure of a transformer," Wright says, "we can bring one of those mobile transformers into the substation, park it in the substation, connect it up in place of that transformer. And we can do that in two to three days."

The Fitzell substation is a new, modern complex. Older sites can be knocked down for weeks.

That raises the question: Can the amount of money dedicated to the power grid in the new infrastructure legislation actually make meaningful changes to the energy system across the country, where studies find more blackouts than other developed nations persist?

"The infrastructure bill, unfortunately, only scratches the surface," says Daniel Cohan, an associate professor in civil and environmental engineering at Rice University.

Though the White House says $65 billion of the infrastructure legislation is dedicated to power infrastructure, a World Resources Institute analysis noted that only $27 billion would go to the electric grid — a figure that Cohan also used.

"If you drill down into how much is there for the power grid, it's only about $27 billion or so, and mainly for research and demonstration projects and some ways to get started," he says.

Cohan, who is also author of the forthcoming book Confronting Climate Gridlock, says federal taxpayer dollars can be significant but that most of the needed investment will eventually come from the private sector — from utility companies and other businesses spending "many hundreds of billions of dollars per decade," even as grid modernization affordability remains a concern. He also says the infrastructure package "misses some opportunities" to initiate that private-sector action through mandates.

"It's better than nothing, but, you know, with such momentous challenges that we face, this isn't really up to the magnitude of that challenge," Cohan says.

Cohan argues that thinking big, and not incrementally, can pay off. He believes a complete transition from fossil fuels to clean energy by 2035 is realistic and attainable — a goal the Biden administration holds — and could lead to more than just environmental benefit.

"It also can lead to more affordable electricity, more reliable electricity, a power supply that bounces back more quickly when these extreme events come through," he says. "So we're not just doing it to be green or to protect our air and climate, but we can actually have a much better, more reliable energy supply in the future."

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California Rolling Blackouts expose grid reliability risks amid a heatwave, as CAISO curtails power while solar output fades at sunset, wind stalls, and scarce natural gas and nuclear capacity plus PG&E issues strain imports.

Key Points

Grid outages during heatwaves from low reserves, fading solar, weak wind, and limited firm capacity.

✅ Heatwave demand rose as solar output dropped at sunset

✅ Limited imports and gas, nuclear shortfalls cut reserves

✅ Policy, pricing, and maintenance gaps increased outage risk

Millions of Californians were denied electrical power and thus air conditioning during a heatwave, raising the risk of heatstroke and death, particularly among the elderly and sick. 

The blackouts come at a time when people, particularly the elderly, are forced to remain indoors due to Covid-19, and as later heat waves would test the grid again statewide.

At first, the state’s electrical grid operator last night asked customers to voluntarily reduce electricity use. But after lapses in power supply pushed reserves to dangerous levels it declared a “Stage 3 emergency” cutting off power to people across the state at 6:30 pm.

The immediate reason for the black-outs was the failure of a 500-megawatt power plant and an out-of-service 750-megawatt unit not being available. “There is nothing nefarious going on here,” said a spokeswoman for California Independent System Operator (CAISO). “We are just trying to run the grid.”

But the underlying reasons that California is experiencing rolling black-outs for the second time in less than a year stem from the state’s climate policies, which California policymakers have justified as necessary to prevent deaths from heatwaves, and which it is increasingly exporting to Western states as a model.

In October, Pacific Gas and Electric cut off power to homes across California to avoid starting forest fires after reports that its power lines may have started fires in recent seasons. The utility and California’s leaders had over the previous decade diverted billions meant for grid maintenance to renewables. 

And yesterday, California had to impose rolling blackouts because it had failed to maintain sufficient reliable power from natural gas and nuclear plants, or pay in advance for enough guaranteed electricity imports from other states.

It may be that California’s utilities and their regulator, the California Public Utilities Commission, which is also controlled by Gov. Newsom, didn’t want to spend the extra money to guarantee the additional electricity out of fears of raising California’s electricity prices even more than they had already raised them.

California saw its electricity prices rise six times more than the rest of the United States from 2011 to 2019, helping explain why electricity prices are soaring across the state, due to its huge expansion of renewables. Republicans in the U.S. Congress point to that massive increase to challenge justifications by Democrats to spend $2 trillion on renewables in the name of climate change.

Even though the cost of solar panels declined dramatically between 2011 and 2019, their unreliable and weather-dependent nature meant that they imposed large new costs in the form of storage and transmission to keep electricity as reliable. California’s solar panels and farms were all turning off as the blackouts began, with no help available from the states to the East already in nightfall.

Electricity from solar goes away at the very moment when the demand for electricity rises. “The peak demand was steady in late hours,” said the spokesperson for CAISO, which is controlled by Gov. Gavin Newsom, “and we had thousands of megawatts of solar reducing their output as the sunset.”

The two blackouts in less than a year are strong evidence that the tens of billions that Californians have spent on renewables come with high human, economic, and environmental costs.

Last December, a report by done for PG&E concluded that the utility’s customers could see blackouts double over the next 15 years and quadruple over the next 30.

California’s anti-nuclear policies also contributed to the blackouts. In 2013, Gov. Jerry Brown forced a nuclear power plant, San Onofre, in southern California to close.

Had San Onofre still been operating, there almost certainly would not have been blackouts on Friday as the reserve margin would have been significantly larger. The capacity of San Onofre was double that of the lost generation capacity that triggered the blackout.

California's current and former large nuclear plants are located on the coast, which allows for their electricity to travel shorter distances, and through less-constrained transmission lines than the state’s industrial solar farms, to get to the coastal cities where electricity is in highest demand.

There has been very little electricity from wind during the summer heatwave in California and the broader western U.S., further driving up demand. In fact, the same weather pattern, a stable high-pressure bubble, is the cause of heatwaves, since it brought very low wind for days on end along with very high temperatures.

Things won’t be any better, and may be worse, in the winter, with a looming shortage as it produces far less solar electricity than the summer. Solar plus storage, an expensive attempt to fix problems like what led to this blackout, cannot help through long winters of low output.

California’s electricity prices will continue to rise if it continues to add more renewables to its grid, and goes forward with plans to shut down its last nuclear plant, Diablo Canyon, in 2025.

Had California spent an estimated $100 billion on nuclear instead of on wind and solar, it would have had enough energy to replace all fossil fuels in its in-state electricity mix.

To manage the increasingly unreliable grid, California will either need to keep its nuclear plant operating, build more natural gas plants, underscoring its reliance on fossil fuels for reliability, or pay ever more money annually to reserve emergency electricity supplies from its neighbors.

After the blackouts last October, Gov. Newsom attacked PG&E Corp. for “greed and mismanagement” and named a top aide, Ana Matosantos, to be his “energy czar.” 

“This is not the new normal, and this does not take 10 years to solve,” Newsom said. “The entire system needs to be reimagined.”

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Vietnam Offshore Wind Regulations expand coastal zones to six nautical miles, remove water depth limits, streamline permits, and boost investment, grid integration, and renewable energy capacity across deeper offshore wind resource areas.

Key Points

Policies extend sites to six nautical miles, scrap depth limits, and speed permits to scale offshore wind.

✅ Extends offshore zones to six nautical miles from shore

✅ Removes water depth limits to access stronger winds

✅ Streamlines permits, aiding grid integration and finance

Vietnam has recently redefined its regulations for offshore wind power projects, marking a significant development in the country's renewable energy ambitions. This strategic shift aims to streamline regulatory processes, enhance project feasibility, and accelerate the deployment of offshore wind energy in Vietnam's coastal regions, amid a trillion-dollar offshore wind market globally.

Regulatory Changes

The Vietnamese government has adjusted offshore wind power regulations by extending the allowable distance from shore for wind farms to six nautical miles (approximately 11 kilometers), a move that aligns with evolving global practices such as Canada's offshore wind plan announced recently by regulators. This expansion from previous limits aims to unlock new areas for development and maximize the utilization of Vietnam's vast offshore wind potential.

Scrapping Depth Restrictions

In addition to extending offshore boundaries, Vietnam has removed restrictions on water depth for offshore wind projects. This revision allows developers to explore deeper waters, where wind resources may be more abundant, thereby diversifying project opportunities and optimizing energy generation capacity.

Strategic Implications

The redefined regulations are expected to stimulate investment in Vietnam's renewable energy sector, attracting domestic and international stakeholders keen on capitalizing on the country's favorable wind resources, with World Bank support for wind underscoring the growing pipeline in developing markets. The move aligns with Vietnam's broader energy diversification goals and commitment to reducing reliance on fossil fuels.

Economic Opportunities

The expansion of offshore wind development zones creates economic opportunities across the value chain, from project planning and construction to operation and maintenance. The influx of investments is anticipated to spur job creation, technology transfer, and infrastructure development in coastal communities, as industry groups like Marine Renewables Canada shift toward offshore wind specialization.

Environmental and Energy Security Benefits

Harnessing offshore wind power contributes to Vietnam's efforts to mitigate greenhouse gas emissions and combat climate change. By integrating renewable energy sources into its energy mix, Vietnam enhances energy security, as seen in the UK offshore wind expansion, reduces dependency on imported fuels, and promotes sustainable economic growth.

Challenges and Considerations

Despite the promising outlook, offshore wind projects face challenges such as technical complexities, environmental impact assessments, and grid integration, as well as exposure to policy risk exemplified by U.S. opposition to offshore wind debates.

Future Outlook

Looking ahead, Vietnam's redefined offshore wind regulations position the country as a key player in the global renewable energy transition, a trend reinforced by progress in offshore wind in Europe elsewhere. Continued policy support, investment facilitation, and technological innovation will be critical in unlocking the full potential of offshore wind power and achieving Vietnam's renewable energy targets.

Conclusion

Vietnam's revision of offshore wind power regulations reflects a proactive approach to advancing renewable energy development and fostering a conducive investment environment. By expanding development zones and eliminating depth restrictions, Vietnam sets the stage for accelerated growth in offshore wind capacity, contributing to both economic prosperity and environmental stewardship. As stakeholders seize opportunities in this evolving landscape, collaboration and innovation will drive Vietnam towards a sustainable energy future powered by offshore wind.

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Vogtle Units 3 and 4 are Westinghouse AP1000 nuclear reactors under construction in Waynesboro, Georgia, led by Southern Nuclear, Georgia Power, and Bechtel, adding 2,234 MWe of carbon-free baseload power with DOE loan guarantees.

Key Points

Vogtle Units 3 and 4 are AP1000 reactors in Georgia delivering 2,234 MWe of low-carbon baseload electricity.

✅ Each unit: Westinghouse AP1000, 1,117 MWe capacity.

✅ Managed by Southern Nuclear, built by Bechtel.

✅ DOE loan guarantees support financing and risk.

Construction is ongoing for two new nuclear reactors, Units 3 and 4, at Georgia Power's Alvin W. Vogtle Electric Generating Plant in Waynesboro, Ga. the first new nuclear reactors to be constructed in the United Stated in 30 years, mirroring a new U.S. reactor startup that will provide electricity to more than 500,000 homes and businesses once operational.

Construction on Unit 3 started in March 2013 with an expected completion date of November 2021. For Unit 4, work began in November 2013 with a targeted delivery date of November 2022. Each unit houses a Westinghouse AP1000 (Advanced Passive) nuclear reactor that can generate about 1,117 megawatts (MWe). The reactor pressure vessels and steam generators are from Doosan, a South Korean firm.

The pouring of concrete was delayed to 2013 due to the United States Nuclear Regulatory Commission issuing a license amendment which permitted the use of higher-strength concrete for the foundations of the reactors, eliminating the need to make additional modifications to reinforcing steel bar.

The work is occurring in the middle of an operational nuclear facility, and the construction area contains many cranes and storage areas for the prefabricated parts being installed. Space also is needed for various trucks making deliveries, especially concrete.

The reactor buildings, circular in shape, are several hundred feet apart from one another and each one has an annex building and a turbine island structure. The estimated total price for the project is expected in the $18.7 billion range. Bechtel Corporation, which built Units 1 and 2, was brought in January 2017 to take over the construction that is being overseen by Southern Nuclear Operating Company (SNOC), which operates the plant.

The project will require the equivalent of 3,375 miles of sidewalk; the towers for Units 3 and 4 are 60 stories high and have two million pound CA modules; the office space for both units is 300,000 sq. ft.; and there are more than 8,000 construction workers over 30 percent being military veterans. The new reactors will create 800 permanent jobs.

Southern Nuclear and Georgia Power took over management of the construction project in 2017 after Westinghouse's Chapter 11 bankruptcy. The plant, built in the late 1980s with Unit 1 becoming operational in 1987 and Unit 2 in 1989, is jointly owned by Georgia Power (45.7 percent), Oglethorpe Power Corporation (30 percent), Municipal Electric Authority of Georgia (22.7 percent) and Dalton Utilities (1.6 percent).

"Significant progress has been made on the construction of Vogtle 3 and 4 since the transition to Southern Nuclear following the Westinghouse bankruptcy," said Paul Bowers, Chairman, President and CEO of Georgia Power. "While there will always be challenges in building the first new nuclear units in this country in more than 30 years, we remain focused on reducing project risk and maintaining the current project momentum in order to provide our customers with a new carbon-free energy source that will put downward pressure on rates for 60 to 80 years."

The Vogtle and Hatch nuclear plants currently provide more than 20 percent of Georgia's annual electricity needs. Vogtle will be the only four-unit nuclear facility in the country. The energy is needed to meet the rising demand for electricity as the state expects to have more than four million new residents by 2030.

The plant's expansion is the largest ongoing construction project in Georgia and one of the largest in the state's history, while comparable refurbishments such as the Bruce reactor overhaul progress in Canada. Last March an agreement was signed to secure approximately $1.67 billion in additional Department of Energy loan guarantees. Georgia Power previously secured loan guarantees of $3.46 billion.

The signing highlighted the placement of the top of the containment vessel for Unit 3, echoing the Hinkley Point C roof lift seen in the U.K., which signified that all modules and large components had been placed inside it. The containment vessel is a high-integrity steel structure that houses critical plant components. The top head is 130 ft. in diameter, 37 ft. tall, and weighs nearly 1.5 million lbs. It is comprised of 58 large plates, welded together with each more than 1.5 in. thick.

"From the very beginning, public and private partners have stood with us," said Southern Company Chairman, President and CEO Tom Fanning. "Everyone involved in the project remains focused on sustaining our momentum."

Bechtel has completed more than 80 percent of the project, and the major milestones for 2019 have been met, aligning with global nuclear milestones reported across the industry, including setting the Unit 4 pressurizer inside the containment vessel last February, which will provide pressure control inside the reactor coolant system. More specialized construction workers, including craft labor, have been hired via the addition of approximately 300 pipefitters and 350 electricians since November 2018. Another 500 to 1,000 craft workers have been more recently brought in.

A key accomplishment occurred last December when 1,300 cu. yds. of concrete were poured inside the Unit 4 containment vessel during a 21-hour operation that involved more than 100 workers and more than 120 truckloads of concrete. In 2018 alone, more than 23,000 cu. yds. of concrete were poured part of the nearly 600,000 cu. yds. placed since construction started, and the installation of more than 16,200 yds. of piping.

Progress also has been solid for Unit 3. Last January the integrated head package (IHP) was set inside the containment vessel. The IHP, weighing 475,000 lbs. and standing 48 ft. tall, combines several separate components in one assembly and allows the rapid removal of the reactor vessel head during a refueling outage. One month earlier, the placement of the third and final ring for containment vessel, and the placement of the fourth and final reactor coolant pump (RCP, 375,000 lbs.), were executed.

"Weighing just under 2 million pounds, approximately 38 feet high and with a diameter of 130 feet, the ring is the fourth of five sections that make up the containment vessel," stated a Georgia Power press release. "The RCPs are mounted to the steam generator and serve a critical part of the reactor coolant system, circulating water from the steam generator to the reactor vessel, allowing sufficient heat transfer for safe plant operation. In the same month, the Unit 3 shield building with additional double-decker panels, was placed.

According to a construction update from Georgia Power, a total of eight six-panel sections have been placed, with each one measuring 20 ft. tall and 114 ft. wide, weighing up to 300,000 lbs. To date, more than half of the shield building panels have been placed for Unit 3. The shield building panels, fabricated in Newport News, Va., provide structural support to the containment cooling water supply and protect the containment vessel, which houses the reactor vessel.

Building the reactors is challenging due to the design, reflecting lessons from advanced reactors now being deployed. Unit 3 will have 157 fuel assemblies, with each being a little over 14 ft. long. They are crucial to fuelling the reactor, and once the initial fueling is completed, nearly one-third of the fuel assemblies will be replaced for each re-fuelling operation. In addition to the Unit 3 containment top, placement crews installed three low-pressure turbine rotors and the generator rotor inside the unit's turbine building.

Last November, major systems testing got underway at Unit 3 as the site continues to transition from construction toward system operations. The Open Vessel Testing will demonstrate how water flows from the key safety systems into the reactor vessel ensuring the paths are not blocked or constricted.

"This is a significant step on our path towards operations," said Glen Chick, Vogtle 3 & 4 construction executive vice president. "[This] will prepare the unit for cold hydro testing and hot functional testing next year both critical tests required ahead of initial fuel load."

It also confirms that the pumps, motors, valves, pipes and other components function as designed, a reminder of how issues like the South Carolina plant leak can disrupt operations when systems falter.

"It follows the Integrated Flush process, which began in August, to push water through system piping and mechanical components that feed into the Unit 3 reactor vessel and reactor coolant loops for the first time," stated a press release. "Significant progress continues ... including the placement of the final reinforced concrete portion of the Unit 4 shield building. The 148-cubic yard placement took eight hours to complete and, once cured, allows for the placement of the first course of double-decker panels. Also, the upper inner casing for the Unit 3 high-pressure turbine has been placed, signifying the completion of the centerline alignment, which will mean minimal vibration and less stress on the rotors during operations, resulting in more efficient power generation."

The turbine rotors, each weighing approximately 200 tons and rotating at 1,800 revolutions per-minute, pass steam through the turbine blades to power the generator.

The placement of the middle containment vessel ring for Unit 4 was completed in early July. This required several cranes to work in tandem as the 51-ft. tall ring weighed 2.4 million lbs. and had dozens of individual steel plates that were fabricated on site.

A key part of the construction progress was made in late July with the order of the first nuclear fuel load for Unit 3, which consists of 157 fuel assemblies with each measuring 14 ft. tall.

On May 7, Unit 3 was energized (permanently powered), which was essential to perform the testing for the unit. Prior to this, the plant equipment had been running on temporary construction power.

"[This] is a major first step in transitioning the project from construction toward system operations," Chick said.

Construction of the north side of the Unit 3 Auxiliary Building (AB) has progressed with both the floor and roof modules being set. Substantial work also occurred on the steel and concrete that forms the remaining walls and the north AB roof at elevation.

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