Detecting Technique for Uranium Distribution Uniformity of Dispersion Uranium-Zirconium Fuel Core Based on Dual Energy Gama-Ray Transmission

Dual energy gama-rays transmission method is a new method for the detection of uranium distribution uniformity of dispersion fuel core. The 136 ke V and 264 ke V high energy of Se-75 radiation source is chosen for the test. HPGe is detected by Gama-ray detector. Under the energy of 264 ke V,U and Zr’s gamma ray attenuation coefficient, which is far greater than the coefficient at the energy of 136 ke V, the content and uniformity of U and Zr in dispersion fuel core were determined. Plexiglass bottles contain Uranium and Zirconium powder are used as criterion specimen for the attenuation measurement and iterative method is used for solve the equation. The results present that the relative errors of detecting system is less than 5%, well meet the requirements.