Document: NUREG-0800
Document ID: 7c7e043f-0cf6-4d85-ad06-3f01128bc7f8
Document Type: srp
Title: (ENiCrFe-7), and 5.14 (ERNiCrFe-7)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380192.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.11
CFR Part: 
CFR Title: 

Content:
e staff concludes that the steam generator materials are acceptable and meet the requirements of GDC 1, 4, 14, 15, 30, and 31 of Appendix A to 10 CFR Part 50; the requirements of Appendices B and G to 10 CFR Part 50; and the requirements of 10 CFR 50.55a. This conclusion is based on the staff’s review of the SAR. 2. The materials used in the fabrication of the steam generator have been identified and conform with the requirements of 10 CFR 50.55a. (For those materials not allowed by Section III of the ASME Code, the materials were reviewed on a case-by-case basis and determined to be acceptable, consistent with the provisions of 10 CFR 50.55a(a)(3).)* 3. The primary side of the steam generator is designed and fabricated to comply with ASME Class 1 criteria. The secondary side of the steam generator is designed and fabricated to comply with ASME Class 2 criteria. (The secondary-side pressure boundary parts of the steam generator will be designed, manufactured, and tested to ASME Class 1 criteria, although the staff-required classification is ASME Class 2.)* 4. The crevice between the tubesheet and the inserted tube will be limited because the tube will be expanded to the full depth of insertion of the tube in the tubesheet. The tube expansion and subsequent positive contact pressure between the tube and the tubesheet will preclude any buildup of impurities from forming in the crevice region and will reduce the probability of crevice boiling. *Indicates material within parentheses “as applicable.” *Indicates material within parentheses “as applicable.” 5.4.2.1-14 Revision 3 - March 2007 (The tube support plates will be manufactured from ferritic stainless steel material, which laboratory tests have shown to be corrosion resistant to the operating environment.)* (The tube support plates will be designed and manufactured with noncircular holes (e.g., a quatrefoil-shaped hole) that only come in close contact with the tube at a limited number of locations around