Assessment of Cavitation-Erosion Resistance of Potential Pump Impeller Materials for Mercury Service at the Spallation Neutron Source

Comparison of Cavitation-Erosion Resistance of Carburized and Carburized-Plus-Nitrided 316LN Stainless Steel in Mercury

“…This is the same heat of 316LN material that was used in several previous investigations of cavitation-erosion performance in mercury in this laboratory. 2-,3, Specimens were machined from the original cross-rolled plate such that 4 the majority of the few inclusion stringers present were oriented parallel to the test surface. After machining (specimen size/shape details reported previously and light 1 grinding of the test surface on 800 grit paper, the specimens were vacuum annealed at 1020EC at 10 Pa (10 torr) or less for 1 h, followed by cooling in the small water-cooled -4 -6 furnace chamber to less than 300EC in about 1 h. It is expected that this sequence of treatments generated specimens as free of residual stress -such as associated with the original plate fabrication, machining or grinding of the test surface -as possible.…”

Status of R&D on mitigating the effects of pressure waves for the Spallation Neutron Source mercury target

“…In-proton-beam mercury target experiments at the Los Alamos Neutron Science Center (LANSCE) Weapons Neutron Research (WNR) and proton radiography facilities [14][15][16][17][18][19][20]. ORNL staff with expertise in erosion, corrosion, and irradiated material science [21][22][23][24][25][26][27][28][29], single-and multi-phase Computational Fluid Dynamics (CFD) [30][31][32][33][34][35][36][37][38], and design/fabrication/ operation of water and mercury test hardware [39]. Resources from university and industry R&D subcontracts (for small gas bubble diagnostic and generation development, gas wall physics, cavitation detection, helium in mercury solubility) [40][41][42][43][44], and Collaboration with the Japan Atomic Energy Agency (JAEA) and JPARC, including access to their Magnetic IMpact Testing Machine (MIMTM) [45][46][47].…”

Numerical Investigation of a High-Pressure Submerged Jet Using a Cavitation Model Considering Effects of Shear Stress

“…Cavitation is a well-known phenomenon in the field of fluid machinery. It can damage the hydraulic parts of the machines accompanied by noise and vibration [1][2][3]. Efforts have been made by researchers to avoid or reduce cavitation impact on pumps and turbines [4][5][6].…”