December 31, 2041 . 8. Authorization of appropriations There are authorized to be appropriated such sums as may be necessary to carry out this Act. 9. Effective date This Act shall take effect 120 days after the date of enactment of this Act. 10. Definitions In this Act: (1) Commission The term Commission means the Nuclear Regulatory Commission. (2) Critical infrastructure The term critical infrastructure means a facility, asset, system, or network, whether physical or virtual, that is so vital to the United States that the incapacity or destruction of such facility asset, system, or network would have a debilitating impact on national economic security, public health or safety, or any combination of those matters. (3) Key resources The term key resources has the meaning given such term section 2 of the Homeland Security Act of 2002 ( 6 U.S.C. 101 ). (4) Small modular nuclear reactor The term small modular nuclear reactor means a nuclear reactor with an electric generating capacity of not more than 200 megawatts.