Radial rings

If a Ufer ground is not being implemented, the radials maybe Cadwelded to a subterranean ring, with the ring interconnected to the tower foot pad via a minimum of three no. 1/0 wires spaced at 120° angles and Cadwelded to the radial ring. 

A typical MELCOR nodalization for the test simulations is shown in Figure 1 [5]. There are 4 control volumes (inlet-, fuel bundle, plenum, and environment) and 3 flow paths interconnecting them. The environment is a contrived volume and is assiimed very large, allowing the system pressure to stay nominally constant, as in the experiments. The fuel bundle active length is nodalized into several axial segments and 1 radial ring. The shroud is nodalized axially to match the core cells and radially into several layers. 

In the MELCOR core model, the btmdle region is divided into concentric radial rings and axial segments that define core cells. Each cell may contain one or more components such as fuel pellets, cladding, etc. and a lumped parameter approach is used for each component within a cell. For the... 

Fig. 4.3.3.1 shows the evolution of Cs(OH), Csl and TeO deposited on the vessel structures during the in-vessel phase of the accident. A revaporization episode is apparent between 2000 and 3000 s, i.e. during the late phase of the core degradation process, but before core support plate failure. At that time, the CVH Package finds a core vapor temperature close to the temperature of the deposits, so revaporization is achieved. Other revaporization episodes are noticeable at 4776 and 5902, corresponding to failures of the second and third radial rings of the lower core support plate. 

Floating Seal Rings Clearance seals that are free to move in a radial direction are known as floating seals. The floating characteris-... 

Larger tubular, or single-can, units usually have more than one nozzle. In many cases a ring of nozzles is placed in the primary zone area. The radial and circumferential distribution of the temperature to the turbine nozzles is not as even as in tubo-annular combustors. In some cases, high stresses are exerted on the turbine casing leading to casing cracks. 

By sliding the scoop tube radially outwards its tip enters the rotating ring of oil and a quantity of oil is picked up by the scoop tube and transferred to the working circuit. With the working circuit partially filled (Figure... 

The one-dimensional geometry of a radially expanding ring is perhaps the simplest for considering fundamental aspects of the fracture and fragmentation process. In a ductile metal ring, fracture proceeds through the multiple... 

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