Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 69 for “"Cycle length"”.
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Economic and fuel-performance analysis of extended operating cycles in existing light water reactors (LWRs)
… I: Economic Analysis of Extended Operating Cycles in Existing LWRs The generic economic aspects of extending operating cycles in LWRs are examined to assess the factors associated with cycle lengths at or near the limit of technical feasibility, based on current NRC mandated burnup limits. …
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Reactor physics assessment of thick silicon carbide clad PWR fuels
… peaking, balancing lower peaking with longer cycle length, or maximal cycle length. Results display the tradeoff between minimized peaking and maximized cycle length for each clad/fuel/reload # case. The presented Zr reference cases and Thick SiC RCF cases operate for an 18 month cycle at 3587 …
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Progesterone and Prolactin Profiles of the Female Asian Elephant (Elephas Maximus)
… (around estrus), weekly (throughout the estrous cycle), and bimonthly (during gestation) in 8 female Asian elephants. A total of 18 estrous cycles with 4 resulting in conception are described. Early gestational values are shown in 4 animals, with 2 animals followed to term. Serum progesterone …
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Induced maturation and spawning of striped bass, Morone saxatilis, exposed to 6-, 9-, and 12-month photothermal regimes
… respectively throughout an annual reproductive cycle. Egg diameter was highly correlated with average (r = 0.89) and maximum (r=0.92) ovarian diameter as measured by ultrasound. Spenniating males exhibited larger maximum testicular diameters (23.5 mm) than non-spermiating males (13.1 mm). Fully …
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Investigating a countercyclical price level with procyclical inflation
… what are often thought of as consistent business cycle facts, and one of these in particular is that of procyclical prices. Several publications have found empirical evidence that, counter to widespread acceptance, this cycle fact is not always true, and in the post World War II era prices have …
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Reactor physics considerations for implementing silicon carbide cladding into a PWR environment
… To evaluate the feasibility of longer fuel cycles and higher power density in SiC clad fuel, a core design study was completed with uranium dioxide fuel and SiC cladding in a standard, Westinghouse 4-loop PWR. NRC-limited values for hot channel and hot spot values were taken into account as …
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Markers of Circadian Disruption and Reproductive Risk Factors for Breast Cancer
… nocturnal melatonin production, menstrual cycle length and circulating sex steroid hormones and prolactin were examined in two additional populations using ordinary least squares regression and generalized estimating equations. Effect modification of nocturnal melatonin and prolactin by age …
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Achievable power uprates in pressurized water reactors using uranium nitride fuel
… the core power that allows for an 18-months fuel cycle length. The impact of the change in the core operating temperature on the steam cycle efficiency is considered in order to provide a final evaluation of the electric power uprate. The steady state limits considered are pressure drop, minimum …
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Developing and Testing a Novel De-centralized Cycle-free Game Theoretic Traffic Signal Controller: A Traffic Efficiency and Environmental Perspective
… operates a flexible phasing sequence and free cycle length to adapt to dynamic changes in traffic demand levels. The developed controller was implemented and tested in the INTEGRATION microscopic traffic assignment and simulation software. The proposed controller was compared to the operation …
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Innovative design of uranium startup fast reactors
… Fast Reactors (USFR) on a once-through fuel cycle in order to facilitate the transition to fast reactors by reducing their plant costs and increase capacity factor. Three different fuel types including uranium carbide (UC), metal (UZr) and uranium oxide (UO₂) are investigated and analyzed …
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Investigation of the oxytocin receptor gene in sheep
… over the late luteal phase of the estrous cycle in sheep is thought to play an important role in the regulation of the cycle length by facilitating the effect of oxytocin on uterine prostaglandin release. At the end of pregnancy, a dramatic increase in the number of OTR also indicates the …
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A mixed-integer linear programming (MILP) model for dynamic coordinated signal optimization along a traffic corridor
… optimization model that jointly determines cycle length, phase sequencing, green-time allocation, and offset synchronization. We also introduce demand-responsive bounds adapting to real-time traffic conditions and a rolling-horizon execution strategy enabling continuous adaptation. The …
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Phase transitions in neural networks
… nature) and imposed structure are studied, when cycles of length greater than, say, 12 time units are considered separately from the less complex, shorter cycles; the aforementioned transitions appear to be consistently rapid, compared to the cycle length, unless architecture is imposed such that …
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Spot evolution on the red giant star XX Triangulum
… a key quantity for the deduction of an activity cycle length. So far, no single starspot decay has been observed, and thus no stellar activity cycle was inferred from its corresponding turbulent diffusivity. We investigate the evolution of starspots on the rapidly-rotating K0 giant XX Triangulum. …
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Long-term scheduling technique for wastewater minimisation in multipurpose batch processes
… of 168h for the case study was reduced to 8 cycles with the cycle length of 23h, for which the CPU time for the optimum cycle is 64.53s.
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Random Walks with Pheromone
… In Chapter 2, we discuss when the graph is the n-cycle, and the set of non-zero function values (the trail) is generated by visits of a simple random walk. We show that an optimal trail length is, in some sense, approximately one third of the cycle length. In Chapter 3, we consider non-contiguous …
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The Food Habits of Redbreast Sunfish in the San Marcos River, Texas
… data were investigated for the effects of fish length and collection area over an annual cycle. Length-weight relationships and condition factors were also determined. The analysis revealed that redbreast sunfish in the San Marcos River were opportunistic feeders and fed heavily upon …
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Extension of EOQ model with emergency orders and explicit energy cost considerations
… order quantity, safety stock, and inventory cycle length that minimize the expected cost per unit time of a product. In order to investigate the effect of energy cost on inventory decisions as well as investigate the environments in which the proposed inventory model is most costeffective, …
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The Greedy Exhaustive Dual Binary Swap methodology for fuel loading optimization in PWR reactors using the poropy reactor optimization Tool
… optimizations are carried out using beginning of cycle eigenvalue as a surrogate for core excess reactivity and thus cycle length. The deterministic Dual Binary Swap is found to locate acceptable patterns less reliably than stochastic methods, but those that are located are of higher quality. …
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LEU+ Fuel Cycle Investigation of the BWRX-300 Design Using Neutronic and Two-Phase Thermal Hydraulic Analyses
… water reactor (BWR) utilizing a typical direct cycle balance of plant (BOP); this reactor concept greatly reduces the complexity of earlier BWRs, has robust passive safety systems, and has vast operational experience due to the prevalence of BWR type reactors across the world. Part of this …
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