Document: NUREG-0800
Document ID: 38291c4d-6d61-4922-8b44-6af61374cfaa
Document Type: srp
Title: ENGINEERED SAFETY FEATURES MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340646.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.1.1
CFR Part: 
CFR Title: 

Content:
th Regulatory Guide 1.37. The reviewer (CMEB) determines whether non-metallic thermal insulation will be used on components of the ESF, and if it is, the reviewer verifies that the amount of leachable impurities in the specified insulation will be within the "acceptable analysis area" of Figure 1 6.1.1-8 Rev. 2 - July 1981 a of Regulatory Guide 1.36, as discussed in subsection II.B.3 of this SRP section. The reviewer (CMEB) verifies that the coatings used in the containment conform with Regulatory Guide 1.54. a. Pressurized Water Reactors (PWRs) The reviewer determines that the coolant spray will have a minimum pH of 7.0 and reviews the methods of ascertaining that the pH will remain above this minimum during the operation of the sprays. The reviewer examines the control of pH of such coolants to evaluate the short-term (during the mixing process) compatibility and long-term compatibility of these sprays with all safety-related components within the containment. The reviewer examines the methods of storing the ESF fluids to determine whether deterioration will occur either by chemical instability or by corrosive attack on the storage vessel. The reviewer determines what effects such deterioration could have on the compatibility of these ESF coolants with both the ESF materials of construction and the other materials within the containment. CMEB further verifies that hydrogen release is controlled in accordance with Regulatory Guide 1.7. The reviewer also compares the assigned corrosion rates of materials in containment, as stated in the SAR, with standard corrosion rate data. In accordance with the procedures in SRP Section 6.5.8 the reviewer examines the paths that the solutions would follow in the containment from sprays and emergency core cooling systems to the sump, for both injection and recirculation phases to verify that no areas accumulate very high or low pH solutions and that any assumptions regarding pH in the modeling of containment spray fission product