; (4) identifies the number of tank cars that need to be phased out or retrofitted under subsection (a) and paragraph (2) and the number that could be retrofitted; and (5) estimates the demand for new tank cars. 111. Rail safety infrastructure research and development grants (a) Research requirement The Administrator of the Federal Railroad Administration shall award grants, in accordance with the restrictions and limitation on eligibility for Class I railroads under section 22907 of title 49, United States Code, which shall be used for research and development of defect detectors and the prevention of derailments of trains transporting hazardous materials. (b) Authorization of appropriations There is authorized to be appropriated to the Federal Railroad Administration, $22,000,000, which shall be used for the grants authorized under subsection (a) and shall remain available until expended. 112. Authorization of appropriations for tank car research and development There is authorized to be appropriated to the Pipeline and Hazardous Materials Safety Administration, $5,000,000, which shall be used for expenses related to the development of— (1) stronger, safer tank cars and valves for tank cars; and (2) other tank car safety features. 113. Federal Railroad Administration safety culture (a) Review Not later than 1 year after the date of the enactment of this Act, the Inspector General of the Department of Transportation shall— (1) conduct a review of the Federal Railroad Administration’s safety culture using the framework developed by the Nuclear Energy Agency of the Organisation for Economic Co-operation and Development