Local power distribution

The local power distribution is reduced by the use of several uranium enrichments in a fuel bundle. Lower uranium enrichments are located near the water gaps, and higher enrichments are located in the center of a fuel bundle. 

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Figure 6.239 Time-related and local power distribution on an AC fed cable. The integral of power over the time window tw must not exceed a certain limiting value in order to ensure the intrinsic safety of this system.

Electrical systems are a collection of complex processes that generate steam, produce electricity, reduce electrical output, centralize local power distribution, and run electrically powered equipment. Lubrication systems provide a constant source of clean oil to pump and compressor bearings, gearboxes, steam turbines, and rotating or moving equipment. Hydraulic systems, which are designed to apply pressure on a confined liquid in order to perform work, are used to open and close valves, lift heavy objects, run hydraulic motors, and stop the rotation of a rotary or reciprocating device. 

Fig. 2.34 Example of a local power distribution of the hexagonal fuel assembly. (Taken from doctoral thesis of K. Dobashi, the University of Tokyo (1998) [18])...

Local Power Distributions for a Homogenized Fuel Assembly... 

Since the core-wide nuclear performance parameters and local power distribution within a fuel assembly depend highly on the moderator condition in LWRs, thermal-hydraulic coupled calculations have been regarded as essential in the core design procedure for thermal neutron spectrum cores. As the thermal-hydraulic... 

The original SRAC system does not include the capability for pin power reconstmction. It only provides the neutron fluxes and power distributions for the homogenized mesh structure. If the intra-assembly heterogeneity is not significant, the fluxes and power distributions for homogenized regions must be similar to those of local ones. On the other hand, the local power distribution in a fuel assembly may... 

The peak values of the cladding surface temperatures in each seed assembly are shown in Fig. 7.41. The MCST throughout the equilibrium cycle, calculated by the single channel analyses, is 643°C. The local power distribution within an assembly is taken into account, but heterogeneity of the subchannels is not considered. The maximum cladding surface temperature is calculated again by subchannel analyses in Sect. 7.6. 

The third transition procedure defines the rules under which competitive suppliers of electricity can compete for end users. There are two polar models that are often debated for power market organization the direct access (or bilateral contracts) regime, and the Poolco regime. Under direct access, consumers enter into direct contracts with competitive suppliers of electricity, and competitive providers of electricity enter into contracts with, and pay an access fee to, the local (regulated) distribution company for the use of local power lines. 

It was shown, in Eqs. (1-73), (1-74), (1-75), that a = 1, afy r> => 0, a = 0. As the zeroth approximation we shall assume that A mid /a are zero (their effects are negligibly small) if Eqs. (1-86) and (1-87) are multiplied by /a and A, respectively, we obtain the condition that og0 and -oSi are zero higher order equations would show that all the coefficients are zero. Thus, the coefficients are proportional to some power of /a (or A). The zero-order approximation to the distribution function is just the local maxwellian distribution... 

Operated in parallel with the local utility while supplying power to a facility s power distribution system... 

A spin-A spin interaction. The fluctuation of the precession frequency is also induced by the microwave pulses used for the excitation and the refocussing the microwave pulses induce the transition betwen a and p spin states, so that the magnetic interaction of a particular A spin with other A spins is changed instantaneously during the second microwave pulse of the ESE measurements. The relaxation process due to the thus-created fluctuation is called instantaneous diffusion. The relaxation rate due to the instantaneous diffusion depends on the distance between the A spins and the number of the A spins. Because the concentration of the A spin depends on the intensity of the microwave pulse, the rate of the instantaneous diffusion also depends on the intensity of the microwave pulse this process can be eliminated in the ESE experiments by lowering the power of the microwave pulses. When the instantaneous diffusion is the dominant process in the phase relaxation, this provides us with a means of studying the local spatial distribution of radical species [13],... 

Number of particles per unit volume of dispersion at time t in incremental range X, X -I- dx in phase space Rotational speed of impeller General function, Eq. (105) Impeller power Distribution function for kinetic energy, Eq. (37) Probability distribution function for local velocity, Eq. (44)... 

The dissipation of microwave power by ceramics is a function of the material properties s and s, which are the real (storage) and imaginary (loss) parts of the dielectric constant, respectively. In addition to the frequency dependence of pabs [Eq. (la)], s and s are themselves functions of the microwave frequency, the ambient temperature, T, as well as material properties, including a number of microstructural and chemical variables. Thus, to emphasize the range of parameters that impact the local power dissipation, we define the following symbols M denotes the microstructural variables, especially volume fraction porosity (VFP), as well as the size, shape, and the distribution of size... 

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