Document: NUREG-0800
Document ID: e2737d9a-8e56-46cb-a97d-aaf62a442c6c
Document Type: srp
Title: PRESSURE-TEMPERATURE LIMITS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340637.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.3.2
CFR Part: 
CFR Title: 

Content:
urveillance program are covered by Appendix H, 10 CFR Part 50. It is strongly recommended that con- sideration by given to the desirability of additional surveillance methods, such as the inclusion of CT, DWT, DT, or other specimens to provide the capability of redundant test methods and analytical procedures, particularly if the estimated neutron fluence is over 2 x 1O16, or the toughness of the vessel material is marginal. The selection of material to be included in the surveillance program should be in accordance with ASTH E-185-73, unless the intent of the program is better realized by using more rigorous criteria. For example, the approach of estimating the actual RTNDT and upper shelf toughness of each plate, forging, or weld in the beltline as a function of service life, and choosing as the surveillance materials those that are expected to be most limiting, may be preferable in some cases. This would include consideration of the initial RTNDT, the upper shelf toughness, the expected radiation sensitivity of the material (based on copper and phosphorous content, for example) and the neutron fluence expected at its location in the vessel. 3.2 SAR Requirements The adequacy of the surveillance program cannot be evaluated unless all pertinent information is included in the SAR. Information requested for beltline materials includes the following: (1) Tensile properties. (2) DWT and Charpy V test results used to determine RTNDT. 5.3.2-17 Rev. 1 - July 1981 (3) Charpy V test results to determine the upper shelf toughness. (4) Composition, specifically the copper and phosphorous content. (5) Estimated maximum fluence for each beltline material. (6) List of materials included in the surveillance program, with basis used for their selection. 3.3 Surveillance Test Procedures Surveillance capsules must be removed and tested at intervals in accordance with Appendix H, 10 CFR Part 50. The proposed removal and test schedule shall be included in the Technical Specifications.