Document: NUREG-0800
Document ID: aa2826ba-9e50-487f-8166-6282791ae259
Document Type: srp
Title: STEAM AND FEEDWATER SYSTEM MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350076.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.3.6
CFR Part: 
CFR Title: 

Content:
fficient information has been provided in accordance with the requirements of this SRP section and that his evaluation supports con- clusions of the following type to be included in the staff's safety evaluation report: The staff concludes that the main steam and feedwater system materials are acceptable and meet the relevant requirements of 10 CFR Part 50, §50.55a, General Design Criteria 1 and 35, and Appendix B to 10 CFR Part 50. This conclusion is based on the following: The applicant has selected materials for Class 2 and 3 components of the steam and feedwater systems that satisfy Appendix I of Section III of the ASME Boiler and Pressure Vessel Code, and meet the requirements of Parts A, B, or C of Section II of the Code. The applicant has also met the recommendations of Regulatory Guide 1.85 which describes acceptable code cases that may be used in conjunction with this industry standard. 10.3.6-5 Rev. 2 - July 1981 When required, the fracture toughness properties of ferritic steel materials satisfy the requirements of the Code. Where the Code allowed fracture testing to be optional, the applicant provided reasonable justification for not requiring fracture toughness testing of ferritic steel components .of the main steam and feedwater systems. These fracture toughness tests and mechanical properties required by the' Code provide reasonable assurance that ferritic materials will have adequate safety margins against the possibility of nonductile behavior or rapidly propagating fracture. The applicant has met the requirements of Regulatory Guide 1.71, "Welder Qualification for Areas of Limited Accessibility," by meeting the regulatory positions in Regulatory Guide 1.71 or pro- viding and meeting an alternative to the regulatory positions in Regulatory Guide 1.71, that the staff has reviewed and found to be acceptable. The onsite cleaning and cleanliness controls during fabrication satisfy the position given in Regulatory Guide 1.37, "Quality Assurance