Graphite additives

Antiwear additives Graphite, M0S2, polytetrafluoroethylene (PTFE)... 

All hexagonal side reflectors and fuel columns have an individual support post with a post seat at the top and bottom of the lower plenum cavity. The support post diameter is 228.6 mm (9 in.). This size is selected to provide additional graphite in the lower pleniim cavity for neutron shielding as well as mixing the primary coolant. The post size is much larger than structurally required to support the column loads. A fracture of lower plenum support structure is a very unlikely event since the mechanical and thermal stresses are far below design limits. 

Pocket Plate Electrode. This is the same type of electrode used in pocket plate nickel-cadmium and nickel-iron batteries. Electrodes are prepared by loading nickel hydroxide hydrate active material and a conductive additive (graphite and/or nickel flake) into tubular flat pockets which are then assembled into electrodes. Little interest currently exists in using this type of electrode in nickel-zinc cells since modern cells attempt to utilize lightweight electrode construction. 

Fig. 8.5 HRTEM images in plan-view orientation of CNTs in a polymer mixture. The TEM specimen has been coated with a thin amorphous carbon film prior to the TEM experiment to prevent specimen from charging. In a, bright-white spots (indicated by arrows) represent open nanotube pores, (b) and (c) HRTEM images at higher magnification reveal the structure of these pores. In b, an encapsulated SWNT bundle is shown in the upper part of the image, and an encapsulated individual SWNT is in the lower part of the image. This SWNT bundle has an inner diameter of 4 nm. (c) The individual SWNT with an inner diameter of ca 1.5 nm is clearly encapsulated by additional graphite layers. The area density of SWNTs was measured to be ca (7.0 1.75 x lO / cm ) from several HRTEM images. (Erom [8])...

In addition, graphite capsules were used in some cases, into which the substances to be tested were placed. Table VII-8 gives some of the results obtained. As the sulphur used was the main source of oxygen in these tests (see test with sulphur alone using a C-capsule) the results were expressed as mq 0/g S. The known oxygen contents of copper and tin were taken into account. 

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