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- W2351796452 abstract "This paper presents a numerical simulant solution of a scatheless measurement of helium pressure in fuel rod by measuring clad temperature indirectly based on the principle that helium has different heat transfer characteristics at different pressure.The paper uses two-dimensional difference method to develop a code named RODTRAN to calculate the transient two-dimensional temperature distribution within the fuel rod.The temperature response at x=14.5 cm is calculated when an end of the rod is inserted into a heat source that has constant temperature.Also calculated are dynamic heat transfer characteristics in the fuel rod under different pressure and it is found that we can use the temperature raising speed at x=14.5 cm to calculate helium pressure in the fuel rod.Moreover,the measure accuracy of helium pressure can be less than five percent,that means we can distinguish 1.9 MPa and 2.0 MPa by 0.5 ℃ maximum temperature difference.At the same time,it is found that the temperature response of rod region with spring inside it is more quick than that region with uranium pellets.The conclusion made in the paper provides a technical support for the design of instrument of in-rod helium pressure scatheless measurement." @default.
- W2351796452 created "2016-06-24" @default.
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- W2351796452 date "2007-01-01" @default.
- W2351796452 modified "2023-09-22" @default.
- W2351796452 title "Numerical simulation on scatheless measurement of helium pressure in fuel rod" @default.
- W2351796452 hasPublicationYear "2007" @default.
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