Cyclic Operation of Pressure Piping With γ Heating

[+] Author and Article Information
K. R. Merckx

Hanford Atomic Products Operation, Richland, Wash.

J. Basic Eng 82(2), 447-451 (Jun 01, 1960) (5 pages) doi:10.1115/1.3662617 History: Received January 30, 1959; Online November 04, 2011


An elastic-plastic analysis is developed for an internally cooled pressure tube with uniform heat generation. This analysis extends the method of calculating the location of the elastic-plastic boundary reported by Barrie [4] to account for the change in the plastic zone due to residual stresses which occur during cyclic operation. Numerical calculations are made for operating conditions expected to be encountered in a pressure tube in a loop through the Engineering Test Reactor Core. The numerical results show that the radius of the initial plastic boundary decreases during subsequent loading cycles. Also, for equal maximum pressure and volumetric heat generation, the total plastic strain per operational cycle on the inner tube surface and the residual tensile stress on the outer tube surface increase when the tube wall is thickened.

Copyright © 1960 by ASME
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