Document: NUREG-0800
Document ID: e6a79bdb-930d-4b57-91b9-39db4d8a76f1
Document Type: srp
Title: ENGINEERED SAFETY FEATURES MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190010.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.1.1
CFR Part: 
CFR Title: 

Content:
@ 25 EC Hydrogen generation in BWR containments is assumed to follow the same characteristics as in pressurized water reactors (PWRs) in that the rates of hydrogen generation will rise with increasing zinc corrosion as the temperature rises, and will change with any change in pH. 3. Component and Systems Cleaning. To meet the requirements of Appendix B to 10 CFR Part 50, Criteria IX and XIII, measures should be established to control the cleaning of material and equipment in accordance with work and inspection instructions to prevent damage or deterioration. 6.1.1-8 Revision 2 - March 2007 Components and systems should be cleaned in conformance with the positions of RG 1.37. 4. Thermal Insulation. To meet the requirements of GDC 1, 14, and 31, the RCPB should be designed, fabricated, erected, and tested in conformance with the following guidelines, such that there is an extremely low probability of abnormal leakage, of rapidly propagating failure, and of gross rupture: A. The composition of nonmetallic thermal insulation on ESF components should be controlled as described in RG 1.36. B. The use of nonmetallic insulation on nonaustenitic stainless steel components should be controlled as described in RG 1.36. Moisture dripping from wet insulation can affect austenitic stainless steel components at lower elevations. C. Concentrations of leachable contaminants and added inhibitors should be controlled as specified in position C.2.b and Figure 1 of RG 1.36 to reduce the probability of stress corrosion cracking of austenitic stainless steel components. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: 1. GDC 1 and 10 CFR 50.55a require that SSCs be designed, fabricated, erected, constructed, tested, and inspected to quality standards commensurate with the importance of the safety function to be performed. 10 CFR 50.55a also incorporates by