North Anna Power Station
The Nuclear Regulatory Commission has indicated it will issue a license within the next few days to build a third nuclear reactor at Dominion Energy’s North Anna power station, the Richmond Times-Dispatch reported earlier this week.
Dominion has spent $600 million so far on planning, engineering and developing the 1,450-megawatt facility, which has been widely reported to cost an estimated $19 billion. While acknowledging the huge up-front expense, Dominion has argued that it needs to keep open the option of a third nuclear unit in case federal and state regulators impose strict carbon controls on Virginia’s electric utilities.
Robert Zullo has done a fine job of covering Dominion for the Richmond Times-Dispatch, and I rely upon his reporting to keep up with the energy and environmental issues the company is embroiled in. But I would not frame the North Anna 3 issue as he did:
Given the massive cost of the controversial project, which has been opposed by both consumer and environmental groups and has yet to be approved by the State Corporation Commission, it remains unclear whether the utility will actually build the reactor.
True, consumer and environmental groups do oppose the project, and, true, it is unclear whether the utility will build the reactor. But the driver isn’t the cost, which is horrendous. The driver is what kind of regulatory regime federal and state governments enact to reduce carbon dioxide emissions from Virginia power plants. If regulators choose a “mass-based” approach that caps CO2 emissions on existing power plants and all new generation units built in the future, Dominion argues, the only way to meet electricity demand, maintain federally mandated reliability standards and stay within the CO2 limits is to construct a new nuclear unit, which emits zero carbon.
Dominion is not advocating construction of North Anna 3. It is not recommending construction of North Anna 3. There is no indication that it even wants to build North Anna 3. Rather it is preserving the option should political and regulatory developments leave it no alternative.
The company lays out its logic in its 2017 Integrated Resource Report, a planning document that provides a 15-year look into the future. There is so much political and regulatory uncertainty that Dominion examines eight different scenarios predicated on different schemes for restricting CO2 emissions. Building North Anna 3 appears in only one of the eight options, which the IRP refers to as “Plan H.” Here’s how Dominion describes that plan:
Plan H is a Mass-Based program that limits the total CO2 emissions from both the existing fleet of fossil fuel-fired generating units and all new generation units in the future, but also includes the construction and operation of North Anna 3 in 2030. This Alternative Plan was developed assuming that the Company achieves [Clean Power Plan] compliance through portfolio modifications with no market purchase of CO2 allowances. This Alternative Plan limits the generation of [the Mt. Storm coal-fired power station] to a 40% capacity factor.
Key assumptions include:
- Retirement of up to four coal-fired units at the Mecklenburg and Clover power stations, totaling 577 megawatts, by 2025.
- 3,360 megawatts of additional solar capacity;
- 2,290 MW of additional natural-gas, Combustion Turbine capacity;
- A 20-year extension of the four existing nuclear units at the North Anna and Surry power stations.
- Addition of 1,452 of nuclear capacity at North Anna 3.
Dominion acknowledges that the compliance costs of Plan H would be extremely expensive — $14.79 billion over the IRP study period compared to $5.71 billion for the next most expensive alternative and $2.3 billion compared to the least expensive alternative.
The impact of Plan H on residential consumers would be considerable. Dominion estimates that average monthly electric rates for a typical residential customer using 1,000 kilowatt hours per month would increase 29.44% by 2030 and subside to 19.01% higher by 2042. That would be more than five times the increase of the next most costly plan in 2030.
Source: Dominion Energy
A key assumption embedded in Dominion’s projections is that electricity demand will increase by an average of 1.5% annually over the next 15 years. The IRP forecasts a compound annual growth rate of 2.04% for the Virginia economy, based upon data supplied by Moody’s Analytics. Thus, a 1.5% load increase implies continued energy-efficiency gains that reduce the energy intensity of each unit of economic growth.
Virginia’s success in attracting energy-intensive data centers plays into the utility’s Virginia forecast. “The Company has seen significant interest in data centers locating in Virginia because of its proximity to fiber optic networks as well as low-cost, reliable power sources,” the IRP says. (See yesterday’s post, “Building on Virginia’s Data Center Boom.”)
Some observers argue that Dominion’s forecast overstates demand growth. Most notably, PJM Interconnection, the regional transmission organization of which Dominion is a part, provides a significantly lower growth forecast for the Dominion transmission zone, as seen here:
Source: Dominion Energy
The IRP addresses this forecast discrepancy at length. Dominion says four factors account for the gap in projected demand growth. First, PJM eliminated new data center growth from its forecast. Second, PJM makes assumptions about Distributed Energy Resources (primarily solar) that overestimate how they would perform during critical system conditions. Third, PJM bases its forecast of appliance saturation and efficiencies on Southeast regional data, while Dominion uses historical data from its own service territory. And fourth, Dominion uses a different methodology to account for public sector energy growth, which accounts for 13% of company sales.
Another unknown is the likelihood that a Plan H scenario will materialize.
The Trump administration has expressed a desire to scrap the Clean Power Plan. Even if it succeeds in neutering the CO2 regulations, though, a future administration could reinstate them. Meanwhile, the Virginia environmental lobby is pushing hard for the CO2 caps contemplated in Plan H, and the McAuliffe administration will announce its own plan later this month to combat CO2. Furthermore, several environmental groups have gone on the record in opposition to extending the life of the existing Surry and North Anna nuclear plants. Should Dominion fail to renew those licenses, it would have to make up nearly 3,400 megawatts of capacity elsewhere. Unable to add fossil fuel capacity under a Plan H scenario, it would be limited to renewables or nuclear. An all-renewables approach could create an unstable grid with major reliability issues. That would leave North Anna 3 as the only alternative.
Many possibilities might obviate the necessity of building North Anna 3 under a Plan H scenario. The electricity load might increase at a slower pace than Dominion forecasts. The utility might succeed in extending the life of its existing nuclear units. Battery storage technology might advance to the point where it is feasible store massive amounts of sunlight-generated energy. There is no way to know at this time what will happen. But as the entity responsible for keeping the lights on, now and far into the future, Dominion is taking no chances. Despite the jaw-breaking cost, it is not taking the North Anna 3 option off the table.