must exceed in order to meet the requirements of such paragraph. (7) Commercial technology The term commercial technology means a design that has been installed in and is being used in 3 or more projects in the United States marketplace in the same general application as in the electric generating facility, and has been in such use in at least 1 of such projects for a period of at least 5 years. (8) Core damage frequency The term core damage frequency means the likelihood that, given the way a reactor is designed and operated, an accident could cause the fuel in the reactor to be damaged. (9) Large early release frequency The term large early release frequency means the likelihood of a release into the environment of a sufficiently large quantity of fission products in an early enough time frame to have the potential for a prompt fatality. (10) Gross recoverable resource potential The term gross recoverable resource potential means the subset of total resource potential for any given renewable energy resource within the boundaries of the United States economic exclusion zone that can be considered theoretically recoverable without allowing for common technological constraints that exist as of the most recent date on which the Secretary has established baseline levels described in paragraph (6). (11) Technical resource potential The term technical resource potential means the subset of gross recoverable resource potential for any given renewable energy resource that can be considered recoverable under available technological performance conditions as of the date of the enactment of this section while considering land-use and environmental siting constraints. (e) Facility Tiers (1) Tier 1 facility The term tier 1 facility means an electric generating facility using a type of technology which accounts for less than 1 percent of annual domestic electricity production in the preceding taxable year, as determined by the Secretary on the basis of data reported by the Energy Information Administration. (2) Tier 2