Document: NUREG-0800
Document ID: 91fee075-c567-438d-bf9f-47be3177b457
Document Type: srp
Title: ENGINEERED SAFETY FEATURES MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070453.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.1.1
CFR Part: 
CFR Title: 

Content:
gency. In some plants, the coolant is stored as a boric acid solution that is neutralized by (dry) sodium phosphates mounted in baskets inside the containment after the ESF sprays are activated.12 The controls on contaminants, such as chlorides, lead, zinc, sulfur, or mercury, in the ESF fluids are reviewed. Nonmetallic thermal insulation, that will be exposed to ESF fluids in DBA environments is evaluated as a potential source of these contaminants. CMEBEMCB reviews corrosion rates as related to hydrogen generation upon 13 request of the Containment Systems Branch (CSB)Containment Systems and Severe Accident Branch (SCSB).14 Compatibility of ESF fluids with organic materials (coatings) is reviewed by CMEB as part of its primary review responsibility for SRP Section 6.1.2.15 2. Component and Systems Cleaning CMEBEMCB reviews the requirements for the cleaning (shop and on-site) of 16 materials and components, cleanliness control, and preoperational system cleaning and the procedures for lay-up of nuclear plant fluid systems. Requirements for the maintenance of system cleanliness of fluid systems and associated components during the operational phase of the nuclear power plant are also reviewed. 3. Thermal Insulation CMEBEMCB reviews the composition of the non-metallic insulation and the 17 control of leachable contaminants from the insulation. The branch also reviews the use of inhibitors to reduce the probability of stress corrosion cracking of automatic stainless steel components. 4. Coatings CMEB reviews the use, and qualifications of the protective coatings used in containment as part of SRP Section 6.1.2. Peeling, flaking or delamination of coatings can result in clogging of ESF system strainers and spray nozzles and thereby stop or slow down the flow rates of the ESF fluids.18 DRAFT Rev. 2 - April 1996 6.1.1-4 Review Interfaces EMCB also performs the following related reviews under the SRP Sections indicated:19 1. Reviews the adequacy of programs for assuring