1. U.S. NRC 10 CFR 50 Appendix G; Fracture toughness requirements; January 2011.
2. U.S. NRC 10 CFR 50 Appendix H; Reactor vessel material surveillance program requirements.
3. ASME Code Section XI, App G; Fracture toughness criteria for protection against failure; Edition 2010.
4. U.S. NRC Regulatory Guide 1.99 Rev. 2; Radiation embrittlement of reactor vessel materials; May 1988.
5. Technical basis for revision of regulatory guide 1.99: NRC guidance on methods to estimate the effects of radiation embrittlement on the Charpy V-notch impact toughness of reactor vessel materials; 1 October 2007.