Single- and two-phase performance characteristics of the Mod-1 semiscale pump under steady state and transient fluid conditions

Multi-phase model development to assess RCIC system capabilities under severe accident conditions

“… Increased knowledge of the RCIC System operational characteristics under accident conditions  Technically-defensible models of the RCIC System v [Goudie, 1917] 5 Figure Terry Turbine Cut-away [Leland, 1917] 5 Figure Terry turbine coupled to a centrifugal pump [Leland, 1910] 6 Figure Terry turbine nozzle geometry and dimensions (inches) [Ross et al, 2015] 7 Figure Pressure stage geometry used for CFD analyses [Ross et al, 2015] 7 Figure Terry turbine velocity stage geometry [Ross et al, 2015] 8 Figure [IAPWS, 2007] 52 Figure An axially split centrifugal multi-stage pump [Sulzer, 2014] [SNL, 2016a] 78 Figure Semiscale single-phase head curve [Olson, 1974] 84 Figure [Gyarmathy, 2005] 173 Figure Tables Table RCIC Pump Test Simulation Conditions 70 Table Grid Independence Study Results for RCIC Pump Simulations 76 Table Possible Pump Operating Modes in MELCOR Simulations 83 Table Octant Arrangement Under the Polar Homologous Representation 85 Table Polynomial Fit Data for Curves in Figure 30 91 Table Polynomial Fit Data for Curves in Figure 31 92 Table NHTS [Luthman, 2017] 171 Table NHTS Experimental Torque/Power Comparison and Simulation Results 172 Table Gyarmathy Nozzle 4B Geometry Data (constant width 20 mm) [Gyarmathy, 2005] 174 Table Gyarmathy The Reactor Core Isolation Cooling (RCIC) System is a safety-related system that provides makeup water for core cooling of some Boiling Water Reactors (BWRs) with a Mark I containment. As its name implies, the RCIC System is intended for isolation events, when the Main Steam Isolation Valves (MSIVs) are closed and the reactor is "isolated" from the turbines.…”

“…Pump trips, 7. Pump numerical treatment options Additionally, pump data from both the Semiscale [Olson, 1974] and Loft [Reeder, 1978] experiments are available as "built-in" performance modeling options. A "universal correlation" [Lahssuny and Jedral.…”

“…An example of the final form for a homologous curve is shown in Figure 28. Note that Appendix A of Beeny [2017] contains all Semiscale [Olson, 1974] and Loft [Reeder, 1978] homologous pump curves.…”

“…Figure 28 Semiscale single-phase head curve [Olson, 1974] Note that a system of three-letter octant identifiers is used. Each octant identifier indicates at once the dependent variable, the independent variable, and the pump mode.…”

Single-phase pump model for analysis of LMFBR heat transport systems

“…a x a 5 + a 2 va' t + (a 3 v 2 -h)a 3 + a 4 v 3 a 2 + a 5 v lt a + a 6 v 5 = 0 (15) This is a fifth degree polynomial equation in a, and is solved by a Newton 1 (8) iteration method specially adapted for polynomials. ; Pump steady-state operating speed can now be obtained from Equation (2) since both a and fi R are known.…”