Research Program to Investigate the Fundamental Chemistry of Technetium

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Technetium (99Tc, half-life = 2.13x105 years, ?-emitter) is one of the radionuclides of major concern for nuclear waste disposal. This concern is due to the long half-life of 99Tc, the ease with which pertechnetate, TcO4 -, migrates in the geosphere, difficulties in incorporating Tc into glass waste forms, and the corresponding regulatory considerations. The problem of mobility of pertechnetate in the environment is compounded by the fact that pertechnetate is the thermodynamically stable form of Tc in oxidizing environments. These factors present challenges for the separation and immobilization of Tc. The objective of this research project is to provide new ... continued below

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Shuh, David K. & Pegg, Ian l. September 24, 2005.

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Description

Technetium (99Tc, half-life = 2.13x105 years, ?-emitter) is one of the radionuclides of major concern for nuclear waste disposal. This concern is due to the long half-life of 99Tc, the ease with which pertechnetate, TcO4 -, migrates in the geosphere, difficulties in incorporating Tc into glass waste forms, and the corresponding regulatory considerations. The problem of mobility of pertechnetate in the environment is compounded by the fact that pertechnetate is the thermodynamically stable form of Tc in oxidizing environments. These factors present challenges for the separation and immobilization of Tc. The objective of this research project is to provide new knowledge about the chemical behavior of Tc so that the factors underlying its speciation in nuclear waste and in waste forms can be understood and the problems can be addressed. In particular, the behavior of Tc and Re in glass will be examined since Re is often used as a non-radioactive surrogate to predict the behavior of Tc.(1) In this project, glasses containing both Re and Tc will be prepared, so that the behavior of both metals can be compared under identical conditions

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  • Report No.: EMSP-73778-2005
  • Grant Number: None
  • DOI: 10.2172/893269 | External Link
  • Office of Scientific & Technical Information Report Number: 893269
  • Archival Resource Key: ark:/67531/metadc882525

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 24, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Feb. 16, 2017, 7:19 p.m.

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Shuh, David K. & Pegg, Ian l. Research Program to Investigate the Fundamental Chemistry of Technetium, report, September 24, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc882525/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.