scholarly journals The mechanistic implications of the high temperature, long time thermal stability of nanoscale Mn-Ni-Si precipitates in irradiated reactor pressure vessel steels (link in doc)

2020 ◽  
Author(s):  
Nathan Almirall ◽  
Peter Wells ◽  
Soupitak Pal ◽  
Philip Edmondson ◽  
Takuya Yamamoto ◽  
...  
Keyword(s):  
High Temperature ◽  
Pressure Vessel ◽  
Atom Probe ◽  
X Ray ◽  
Pressure Vessel Steels ◽  
Long Time ◽  
Radiation Induced ◽  
Two Temperatures ◽  
Thermal Stability Of ◽  
Reactor Pressure

Post irradiation annealing (PIA) clarified the induced versus enhanced controversy regarding nanoscale Mn-Ni-Si precipitate (MNSP) formation in pressure vessel steels. Radiation induced MNSPs would dissolve under high temperature PIA, while radiation enhanced precipitates would be stable above a critical radius (rc). A Cu-free, high Ni steel was irradiated with 2.8MeV Fe2+ ions at two temperatures to generate MNSPs with average radii () above and below an estimated rc for PIA at 425°C up to 52 weeks. Atom probe tomography and energy dispersive x-ray spectroscopy showed MNSPs with r < rc dissolved, while those with r > rc slightly coarsened, consistent with thermodynamic predictions.

scholarly journals 3-D Atom Probe Observation of Solute Atom Clusters in Reactor Pressure Vessel Steels

Materia Japan ◽  
2008 ◽  
Vol 47 (12) ◽  
pp. 619-619
Author(s):  
Kenji Nishida ◽  
Kenji Dohi ◽  
Akiyoshi Nomoto ◽  
Naoki Soneda
Keyword(s):  
Pressure Vessel ◽  
Solute Atom ◽  
Atom Probe ◽  
Reactor Pressure Vessel ◽  
Atom Clusters ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

701 Surveillance Test Specimens of Nuclear Reactor Pressure Vessel Steels analyzed by 3D Atom Probe and Positron Annihilation

2006 ◽  
Vol 2006 (0) ◽  
pp. 379-380
Author(s):  
Yasuyoshi NAGAI ◽  
Takeshi TOYAMA ◽  
Zheng TANG ◽  
Masayuki HASEGAWA ◽  
Abderrahim Almazouzi ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Pressure Vessel ◽  
Nuclear Reactor ◽  
Atom Probe ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

The Effect of Radiation-Induced Structural Changes under Accelerated Irradiation on the Behavior of Water-Cooled Reactor Pressure Vessel Steels

2013 ◽  
Vol 592-593 ◽  
pp. 573-576 ◽  
Author(s):  
Boris A. Gurovich ◽  
Evgenia A. Kuleshova ◽  
Dmitry A. Maltsev ◽  
Oleg Zabusov ◽  
Kirill Prikhodko ◽  
...  
Keyword(s):  
Pressure Vessel ◽  
Structural Changes ◽  
Structural Features ◽  
Reactor Pressure Vessel ◽  
Fast Neutron Flux ◽  
Radiation Embrittlement ◽  
Pressure Vessel Steels ◽  
Radiation Induced ◽  
Hardening Mechanisms ◽  
Reactor Pressure

In this paper the influence of fast neutron flux on the structural features and properties of VVER-1000 reactor pressure vessel steels was studied. It is shown that for high Ni steels the flux effect is due to hardening and non-hardening mechanisms of radiation embrittlement.

On the thermal stability of late blooming phases in reactor pressure vessel steels: An atomistic study

2013 ◽  
Vol 442 (1-3) ◽  
pp. 282-291 ◽  
Author(s):  
G. Bonny ◽  
D. Terentyev ◽  
A. Bakaev ◽  
E.E. Zhurkin ◽  
M. Hou ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steels ◽  
Atomistic Study ◽  
Thermal Stability Of ◽  
Reactor Pressure
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