In 1967 the Atomic Energy Commission granted Vermont Yankee a construction permit for a nuclear power plant in Vernon, Vermont, after the required adjudicatory hearing and reviews. Vermont Yankee later applied for an operating license; NRDC intervened and objected to exclusion of fuel-reprocessing and waste-disposal impacts from the hearing. In November 1972 the Commission opened a separate rulemaking proceeding on those fuel-cycle issues, noticed two alternative approaches based on its Environmental Survey, and conducted a February 1973 hearing at which more than forty participants submitted comments but no discovery or cross-examination occurred. In April 1974 the Commission adopted a rule assigning numerical values to fuel-cycle impacts and applied it prospectively.
In January 1969 Consumers Power applied for permits to build two nuclear reactors in Midland, Michigan. After staff and ACRS review, Saginaw and Mapleton intervened and raised 119 environmental contentions, including seventeen on energy conservation. The Licensing Board held hearings on radiological issues, the staff issued a final environmental impact statement in March 1972, and further hearings occurred in May and June 1972; Saginaw declined to participate in the later hearings or submit proposed findings. The Licensing Board granted the construction permit, the Appeal Board affirmed, and the Commission declined further review. In November 1973 the Commission ruled in another case that energy-conservation evidence meeting threshold tests could be considered, but it later refused Saginaw's motion to reopen the Consumers Power record.
NRDC appealed the Vermont Yankee license and rule to the D.C. Circuit; Saginaw and others appealed the Consumers Power permit. In 1976 the Court of Appeals remanded both matters, holding the fuel-cycle rulemaking procedures inadequate, the Consumers Power environmental impact statement defective for omitting energy conservation, and the ACRS report insufficiently explained. The Supreme Court granted certiorari in 1977.
The Commission is the successor agency to the Atomic Energy Commission under the Energy Reorganization Act of 1974. All licensing proceedings followed the two-stage process of construction permit followed by operating license under the Atomic Energy Act of 1954, with NEPA environmental reviews added after 1969.
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