Document: NUREG-0800
Document ID: fbf00155-ed67-4c5f-bb08-246909eb564a
Document Type: srp
Title: REACTOR COOLANT PRESSURE BOUNDARY MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340601.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.3
CFR Part: 
CFR Title: 

Content:
actor coolant pressure boundary should have an upper limit on the yield strength of 90,000 psi. (Applicable to material reviewed by MTEB in item I.4.b.) c. The acceptance criteria for compatibility of austenitic stainless steel with thermal insulation are based on Regulatory Guide 1.36 to satisfy GDC 14 and 31 relative to prevention of failure of the RCPB. The compatibility of austenitic stainless steel materials with thermal insulation is dependent upon the type of insulation. The thermal insulation is acceptable if either reflective metal insulat- ion is employed or a nonmetallic insulation which meets the criteria of Regulatory. Guide 1.36, "Nonmetallic Thermal Insulation for Austen- itic Stainless Steel," is used. The acceptance criteria for nonmetallic insulation for stainless steel are based on the levels of leachable contaminants in the material and are presented in position C.2.b and Figure 1 of the guide. (Applicable to material reviewed by CMEB in item I.4.c.) d. The acceptance criteria for control of welding of austenitic stainless steels are based on Regulatory Guides 1.31, 1.34, and 1.71 to satisfy the quality standards requirements of GDC 1, GDC 30, and §50.55a. (Item II.4.d is applicable to material reviewed by MTEB as specified in item I.4.d.) The acceptance criteria for delta ferrite in austenitic stainless steel welds are given in Regulatory Guide 1.31, "Control of Ferrite Content in Stainless Steel Weld Metal." These acceptance criteria cover (1) verification of delta ferrite content of filler metals, (2) ferrite measurement, (3) instrumentation, (4) acceptability of test results, and (5) documentation of weld pad verification test. The acceptance criteria for electroslag welds in austenitic stainless steel are given in Regulatory Guide 1.34, "Control of Electroslag Weld Properties." These criteria specify acceptable solidification patterns for qualification of austenitic stainless steel welds and the basis for verifying conformance during