Document: NUREG-0800
Document ID: 6cdd237d-c5b3-4a09-8753-54cfe1fea503
Document Type: srp
Title: REACTOR VESSEL MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190007.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.1
CFR Part: 
CFR Title: 

Content:
meet the provisions for the additional analysis in paragraph IV.A.1.a. The reviewer also evaluates the end-of-license Charpy upper shelf energy for the reactor vessel materials in accordance with the acceptance criterion specified in 10 CFR Part 50, Appendix G, paragraph IV.A.1.a. Reactor vessel materials that do not meet the specified initial Charpy upper shelf energy acceptance criterion shall be evaluated in accordance with the provisions for additional analysis also specified in paragraph IV.A.1.a. In accordance with paragraph IV.A.1.c., this analysis must be submitted to the staff for review and approval at least three years prior to the date on which the predicted Charpy upper shelf energy will no longer satisfy the requirements of paragraph IV.A.1.a. In addition to the ASME Code, RG 1.161 provides an acceptable methodology for the performance of analyses intended to meet the provisions for additional analysis specified in paragraph IV.A.1.a. For those plants that were designed and constructed prior to the effective date of Appendix G, 10 CFR Part 50, some of the fracture toughness requirements of Appendix G may not be explicitly met. The detailed procedure for conducting the review of such cases is found in Branch Technical Position 5-3, “Fracture Toughness Requirements.” Exemptions from the regulation can only be granted when the applicant has demonstrated equivalence to the required margin of safety. 6. Material Surveillance. The reviewer verifies that the information contained in the SAR and the Technical Specifications is complete enough to determine that the surveillance program will comply with Appendix H, 10 CFR Part 50. The following information must be provided as a minimum: A. The reviewer verifies that the PSAR states the end-of-life fluence calculated for the vessel belt-line, the maximum predicted shift in reference transition temperature (RTNDT), the number of capsules, and the number and types of specimens to be placed in the capsules, and