normal operating rates, and expected to be consumed in its normal application, and (B) the denominator of which is the incident energy, whether mechanical, radiation, or thermal energy, which is measurable at the input of the electric generating facility. (3) Energy efficiency The term energy efficiency means the fraction— (A) the numerator of which is the total useful electrical, thermal, and mechanical power which is produced by the facility at normal operating rates and expected to be consumed in its normal operation, and (B) the denominator of which is the lower heating value of the energy sources for the facility. (4) Efficiency baseline Not less frequently than every 10 years, the Secretary, in consultation with the Secretary of Energy, shall establish baseline levels with respect to the types of electric generating facilities and the measures of efficiency described in paragraph (1) which a facility must exceed in order to meet the requirements of such paragraph. (5) 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. (6) 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. (7) 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. (f) Transfer of credit by certain public entities (1) In general If, with respect to a credit under subsection (a) for any taxable year— (A) a qualified public entity would be the taxpayer (but for this paragraph), and (B) such entity elects the application of this paragraph