Development of a Triple-Coincidence Positron Lifetime Spectrometer for Nuclear Materials Research

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In this paper, the development of a new positron lifetime spectrometer dedicated to high radioactive materials such as nuclear power plant’s mixed oxide fuels and structural steels is discussed. In the case of nuclear fuels, the behaviour of nanoscale defects, which are mainly created by the high radioactivity and high irradiation flux of neutrons and fission products is of primer importance to control the evolution of the fuel properties from its synthesis to its long term depository after its use in reactor. The deterioration of mechanical strength of structural components under high thermal and radiation fluxes is dependent on the microstructural evolution of radiation damage. A new kind of a lifetime spectrometer is required in order to reduce unwanted effects arising from the excess gamma radiation of the high-active nuclear fuel samples.


Original languageEnglish
Number of pages4
Publication statusPublished - 2016
EventNuclear Science and Technology Symposium - Suomalaisen Ydintekniikan Päivät - Marina Congress Center, Helsinki, Finland
Duration: 2 Nov 20163 Nov 2016


ConferenceNuclear Science and Technology Symposium - Suomalaisen Ydintekniikan Päivät
Abbreviated titleNST
Internet address

ID: 10532832