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NUCLEAR APPLICATIONS OF ELECTRON BEAM WELDING
Electron beam has been applied to the fabrication of fuel elements for pressurised water reactors and the distinct advantages are:Vacuum environment prevents contamination of the weld joint and ensures that the weld metal possesses good corrosion resistance & mechanical properties. High concentration of weld heat, the concentration of thermal energy is an important advantage of EBW of plate t ype fuel element s. High concentration of heat reduces shrinkage and thermal distortion for example, in fuel elements welding, total transverse shrinkage weld seam is only 0:02 mm to 0:04 mm for electron beam welds. Complex welded structures of molybdenum are being EB welded.
Radiu s of Gyration (K) The radius of gyration of given lamina about given axis is that distance from te given axis at which all the elemental parts of lamina would have to be
Determine the moment of resistance of the beam: A circular beam of diameter 100 mm is subjected to bending. The maximum bending stress is restricted to 50 N/mm 2 . Determine t
Evaluatio n of the Internal Energy of Steam: It is actual heat energy stored in steam above the freezing point of water. We know enthalpy = internal energy + pressure ener
DEFINE A SHAPE FACTOR
Determine Strain energy stored in coiled helical spring: For a close coiled helical spring subjected to an axial load of 200 N with 10 coils of wire of diameter 18 mm and buil
WELD PREPARATION: Joint Tolerance & Cleaning Joint Tolerance The allowable tolerance of joint dimensions depends upon whether the welding is to be done manually or
What is Tool Angle? The several angles influence tool performance to a considerable extent & therefore their value should be selected with great care & consideration. a) It
Give justification toward the development of rapid prototyping?
actual division 2km is shown as 1 cm in a map.construct a clean scale to measure km which can travel a distance upto 30 km.Show measurement of 18 km in the scale
A steel rod of 20 mm diameter passes centrally through a copper tube of 50 mm external diameter and 40 mm internal diameter. The tube is closed at each end by rigid plates of negli
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