About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Presentation Title |
Characterization of High-Fluence A-60 Surveillance Capsule From Palisades NPP |
| Author(s) |
Mikhail Sokolov, Tim Lach, Kun Wang, Xiang Chen |
| On-Site Speaker (Planned) |
Mikhail Sokolov |
| Abstract Scope |
The Palisades NPP included in its surveillance program a surveillance capsule, designated A-60, containing specimens of a weld metal with nickel content of about 1.36 wt% and copper content of about 0.20 wt%. The capsule was removed from its surveillance position in the early 1995 and has been resident in the spent fuel pool since that time. This capsule was irradiated to a fluence of 1.9×1020 n/cm2 (E> 1MeV) that is equivalent for more than 160 effective full power years (EFPYs) for the US reactor pressure vessel (RPV) fleet. The A-60 capsule contained specimens made from 1) standard reference material (SRM, HSST Plate 01), 2) intermediate shell course A302-B Modified plate, 3) heat-affected-zone material, and 4) weld metal using Linde 1092 flux. This presentation will provide results of tensile and Charpy impact testing data as well as discuss how Palisades high-fluence surveillance data corresponds to the current embrittlement correlation models. Changes in mechanical properties are compared with microstructural changes characterized by TEM and APT to evaluate the extent of radiation induced defects – primarily radiation induced segregation and precipitation – which are known to contribute to radiation-induced embrittlement. Current results support current trend of RPV fleet operation for 80 years and provide insights to improve embrittlement trend curves, ensuring the safety and reliability of nuclear power plants operating at high fluences beyond 80 years. |
| Proceedings Inclusion? |
Undecided |