The quality supervision of X ray testing of the welds in nuclear power plant fuel rods was introduced including its necessity, basis, contents and implementation.

Through dye check, X-ray test, and metallographic examination, quite a lot of cracks were found in the welds of a deaerator storage tank at the cogeneration plant of Shanghai Petrochemical Works.

Rigaku 3080e3 X-ray spectrometer was applied to the determination of major and trace mineral elements in muskmelon, calibration was made by using national plant standard reference materials.