Analytical and experimental studies relating to the simulated start-up of in-core thermionic reactor systems

Abstract

Page 3.7. Comparison of Present Thermionic Analysis to R-D Approach for +2c Step 84 3.8. Comparison of Present Thermionic Analysis to R-D Approach for Change in Load 85 4.1. Experimental Diode Assembly 91 4.2. Simulated Diode Assembly 93 4.3. Steady-State Comparisons of Experimental and Analytical I-V Curves 102 4.4. Three Parallel-Connected Diode Model 105 4.5. Comparison of Three Parallel Diode Model and Experimental System Responses for + Power Ramp HO 4.6. Comparison of Single Average Diode Model and Experimental System Responses for + Power Ramp HI 4.7. Comparison of Three Parallel Diode Model and Experimental System Responses for Decrease in Load 113 4.8. Comparison of Single Average Diode Model and Experimental System Responses for Decrease in Load H^ 4.9. Effect of Heat Input on Emitter Temperature at Constant Reservoir Temperature 116 4.10. Comparison of Three Parallel Diode Model and Experimental System Responses for Thermionic Burnout 118 4.11. Comparison of Single Average Diode Model and Experimental System Responses for Thermionic Burnout 119 5.1.

Stability of nuclear reactor systems having time delays

“…al. 1968;Brehm, Hetrick, and Schmidt 1969;Guppy, 1970a). With the in-core concept, heat energy from fission is supplied directly to a metallic surface; (emitter) causing electrons to gain enough energy to leave the surface, traverse a cesiated gap, and be collected by a second metallic surface called a collector.…”

“…(1969) 1969) we then use the prompt-jump approximation to the one-delayedgroup point-reactor equations to describe the neutron dynamics. Rather than writing one heat transfer equation for each region as Gronroos (1967) and Guppy (1970a) have done, we assume that the fuel and emitter may be treated as a single region described by the emitter temperature.…”

“…al. 1968) or the Taylor series approximation (Gronroos 1967;Guppy 1970a). In the model for this analysis, we will go one step further by representing the coolant loop with pure time delays between the reactor and radiator.…”

“…The materials selected for the thermionic diode as well as the operating conditions are based on the models used by Guppy (1970a) and Gronroos (1967). The values of the parameters selected are given in Table 4.1.…”

Multiple input-output feedback synthesis incorporating cross-coupling

“…3-12 dynamic compensators can be placed in the input channels to condition the system response further (Tyler and Tuteur, 1966). Guppy (1970) and in the single-input, single-output control system study by Weaver, Gronroos, Guppy, and Davis (1969).…”