D.C. Circuit Strikes Down ACE Rule
On January 19, 2021, the U.S. Court of Appeals for the District of Columbia Circuit struck down the Affordable Clean Energy Rule (ACE), which the Environmental Protection Agency (EPA) promulgated in 2019 to replace the Obama-era Clean Power Plan (CPP). The CPP had sought to reduce greenhouse gas (GHG) emissions from existing power plants, in part, by authorizing states to increase renewable generation. As explained in a previous post, EPA had reasoned that it had the discretion to define the best system of emission reduction (BSER) at a plant under Section 111 of the Clean Air Act (Act) to include measures employed outside the facility (such as new renewable resources) that were located “beyond the fenceline.” Stayed by the Supreme Court in 2016, the CPP never went into effect. Instead, the Trump administration repealed the CPP and replaced it with ACE. In ACE, EPA reasoned that Section 111 of the Act required EPA to only find BSER to be a technology that could be applied “inside the fenceline” on the facility.
EPA Issues Final Power Plant Wastewater Rule
On August 31, 2020, the U.S. Environmental Protection Agency (EPA) announced a final rule addressing effluent concentration limits for certain metals in power plant wastewater under the Clean Water Act. The Steam Electric Reconsideration Rule (SERR) changes several aspects of the coal-fired power plant effluent limitations included in the 2015 Effluent Limitations Guidelines and Standards rule, including the limits for two waste streams: flue gas desulfurization (FGD) wastewater and bottom ash (BA) transport water. (more…)
U.S. Nuclear Regulatory Commission Approves First Small Modular Reactor Design
On August 28, 2020, the U.S. Nuclear Regulatory Commission (NRC) approved the first-ever design certification application for a small modular reactor (SMR) through its issuance of a final safety evaluation report that outlines the agency’s multiyear, six-phased technical review. The agency approval represents a milestone for the U.S. nuclear sector and advanced nuclear technologies.