Document: NUREG-0800
Document ID: d4acff25-51e1-4891-b590-9ad78ef4833e
Document Type: srp
Title: REACTOR VESSEL MATERIALS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340633.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.1
CFR Part: 
CFR Title: 

Content:
exposure to neutron irradiation and the thermal environment. Under the surveillance programs, fracture toughness test data are obtained from material specimens withdrawn periodically from the reactor vessel. These data will permit the determination of the conditions under which the vessel can be operated with adequate margins of safety against fracture throughout its service life. 5.3.1-2 Rev. 1 - July 1981 7. Reactor Vessel Fasteners The materials for the stud bolts, washers, and nuts, or other fasteners used to hold the reactor vessel head, are reviewed to determine their adequacy. Mechanical properties, including frac- ture toughness, are checked to ensure that all requirements are met. Lubricants or surface treatments used are reviewed to ensure that the studs will be resistant to stress-corrosion cracking under the environmental conditions during service and shutdowns. The adequacy of the destructive testing procedures used to ensure initial integrity is reviewed, along with the applicable acceptance criteria. In addition, the MTEB will coordinate evaluations, of other branches, that interface with the overall review of the reactor vessel materials as follows: The Chemical Engineering Branch (CHEB) determines the compatibility of the thermal insulation with the austenitic stainless steel of the reactor vessel appurtenances and determines the acceptability of any nonmetallic thermal insulation that is employed, as part of its secondary review responsibility for SRP Section 5.2.3. The review for Quality Assurance is coordinated and performed by the Quality Assurance Branch (QAB) as part of its primary review respon- sibility for SRP Sections 17.1 and 17.2. For those areas of review identified above as part of the review responsibility of other branches, the acceptance criteria necessary for the review and their method of application are contained in the referenced SRP section of the corre- sponding branch. II. ACCEPTANCE CRITERIA MTEB acceptance criteria are