Carbon Rules Proposed for Existing Power Plants

Existing fossil fuel–fired U.S. power plants must comply with state-specific goals to lower carbon pollution by 2030 under rules proposed by the Environmental Protection Agency (EPA) today.

The so-called “Clean Power Plan,” which applies to existing power plants, seeks to cut carbon emissions from the power sector by 30% from 2005 levels by 2030.

It essentially consists of two main parts: state goals that must be achieved within a 10- to 15-year window after the plan is final and guidelines to help states develop plans by June 2016 (with a one-year extension option) to meet those goals. The EPA said the proposal, which gives states the option to work individually or in regional groups, “ensures that states have the flexibility to choose the best set of cost-effective reductions for them.”

Each state’s goal is a rate—a single number for the future carbon intensity of that state, calculated as CO2 emissions from fossil fuel–fired power plants in pounds divided by state electricity generation from fossil fuel–fired power plants and certain low- or zero-emitting power sources in megawatt-hours.

“Each state’s goal reflects the fact that CO2 emissions from fossil fuel–fired power plants are determined both by how efficiently they operate and by how much they operate,” the EPA said.

States can choose how to meet their goals through specific options, including investing in energy efficiency programs, expanding renewable and “low-carbon” capacity, upgrading aging infrastructure, or “looking broadly across the power sector for strategies that get reductions.”

The EPA is proposing the state goal approach under Section 111(d) of the Clean Air Act, which requires that the EPA identify the “best system of emission reduction … adequately demonstrated” (BSER) that is available to limit pollution. It identified four “building blocks” that it says are in use by many states and utilities to make up the best system to curb carbon pollution. These include making fossil fuel power plants more efficient; using lower-emitting sources (such as natural gas combined cycle units); using more renewable and nuclear sources; and using power more efficiently.

New Proposal for Modified, Reconstructed Power Plants

In a separate action today, the EPA also proposed standards to address CO2 emissions from modified and reconstructed power plantsunder the authority of Clean Air Act Section 111(b). “The proposed emission limits for modified or reconstructed sources are based on the performance of available and demonstrated technology,” the EPA said. “These proposed limits for modified and reconstructed sources do not require implementation of carbon capture and storage (CCS) technology, nor are they based on that technology.”

Instead, the agency proposed separate numeric standards for different types of units. For modified utility boilers and integrated gasification combined cycle units, the EPA proposed two alternative standards of performance. Under the first alternative, all modified units would be subject to a single standard of performance, and under the second, the specific form of the standard will depend on whether the source makes the modification before or after becoming subject to a CAA section 111(d) state plan. Performance standards for modified natural gas stationary combustion turbines are set at a level based on natural gas combined cycle technology.

Total Compliance Costs Range from $7.3B to $8.8B

According to the EPA’s Regulatory Impact Analysis (RIA), total compliance costs for the longer-term “building block” BSER-approach (dubbed “Option 1”) are much steeper than for “Option 2,” on which the EPA is taking comment, and which calls for carbon emissions reductions of 24% over a shorter timeframe to 2025.

Total compliance state costs for Option 1 will be $7.5 billion in 2020, while total compliance regional costs for the same option will be $4.6 billion in 2020. Option 2 state costs tally $5.5 billion, while regional costs are about $4.5 billion in 2020. Option 1 state compliance costs by 2030 amount to $8.8 billion, while regional costs are $7.3 billion.

The RIA also estimates that under Option 1, average nationwide retail power prices could increase between 6% and 7% in 2020, but only by 3% in 2030 because increased energy efficiency will lead to reduced usage.

Average delivered coal prices to the power sector could see a steep drop (by 16%–17% in 2020) under Option 1—but that is in large part due to a decline in the use of coal for power, which the EPA estimates will drop to roughly 30% to 32% in 2030. Natural gas prices, on the other hand, could soar by 9% to 12% in 2020.

According to EPA Administrator Gina McCarthy, climate and health benefits are much higher. “In 2030, the Clean Power Plan will deliver climate and health benefits of up to $90 billion dollars,” she said in a statement today.  “And for soot and smog reductions alone, that means for every dollar we invest in the plan, families will see $7 dollars in health benefits. And if states are smart about taking advantage of efficiency opportunities, and I know they are, when the effects of this plan are in place in 2030, average electricity bills will be 8% cheaper.”

“This plan is all about flexibility,” she added. “That’s what makes it ambitious, but achievable. That’s how we can keep our energy affordable and reliable. The glue that holds this plan together, and the key to making it work, is that each state’s goal is tailored to its own circumstances, and states have the flexibility to reach their goal in whatever way works best for them.”

Sonal Patel, associate editor (@POWERmagazine, @sonalcpatel)



SHARE this article