Direkt zum Inhalt
  • Paul Scherrer Institut PSI
  • PSI Research, Labs & User Services

Digital User Office

  • Digital User Office
  • DE
  • EN
  • FR
Paul Scherrer Institut (PSI)
Suche
Paul Scherrer Institut (PSI)

Hauptnavigation

  • Research at PSIÖffnen dieses Hauptmenu Punktes
    • Research Initiatives
    • Ethics and Research integrity
    • Scientific Highlights
    • Scientific Events
    • Scientific Career
    • PSI-FELLOW
    • PSI Data Policy
  • Research Divisions and LabsÖffnen dieses Hauptmenu Punktes
    • Overview
    • Research with Neutrons and Muons
    • Photon Science
    • Energy and Environment
    • Nuclear Energy and Safety
    • Biology and Chemistry
    • Scientific Computing, Theory and Data
    • Large Research Facilities
  • Facilities and InstrumentsÖffnen dieses Hauptmenu Punktes
    • Overview
    • Large Research Facilities
    • Facilities
    • PSI Facility Newsletter
  • PSI User ServicesÖffnen dieses Hauptmenu Punktes
    • User Office
    • Methods at the PSI User Facilities
    • Proposals for beam time
    • Proposal Deadlines
    • Data Analysis Service (PSD)
    • EU support programmes
  • New ProjectsÖffnen dieses Hauptmenu Punktes
    • SLS 2.0
    • IMPACT
  • DE
  • EN
  • FR

Digital User Office (mobile)

  • Digital User Office

Sie befinden sich hier:

  1. PSI Home
  2. Labs & User Services
  3. NES
  4. LRC
  5. Research Groups
  6. Isotope and Target Chemistry
  7. Waste treatment

Sekundäre Navigation

Laboratory of Radiochemistry

  • Research Groups Ausgeklappter Submenü Punkt
    • Heavy Elements
    • Isotope and Target Chemistry Ausgeklappter Submenü Punkt
      • Isotope production and separation
      • Target Manufacturing
      • Nuclear Data
      • Waste treatment
      • MeaNCoRN
      • Instruments and Methods
        • Molecular Plating
        • Vapour Deposition
        • Droplet Deposition
        • Spin Coating
        • alpha-spectrometry
        • gamma-spectrometry
        • LSC
        • Thermochromatography
      • Fe-60 in Astrophysics
      • Workshops and Conferences
        • ERAWAST
      • Isotope and Target Delivery
    • Radionuclide Development
  • People
    • Team Heavy Elements
    • Team Isotope and Target Chemistry
    • Team Radionuclide Development
  • Publications
  • Annual Reports
  • Seminars
  • Open Positions
  • Nützliche Links

  • Neutron Irradiation Service (NIS)

Info message

Dieser Inhalt ist nicht auf Deutsch verfügbar.

Waste treatment and Isotope Reclamation

Table 1. Analytical results on elements/isotopes content in irradiated fuel
Table 1. Analytical results on elements/isotopes content in irradiated fuel
The PSI HOTLAB facility routinely performs examinations of spent nuclear fuel. This consequently leads to the accumulation of high level radioactive waste within the HOTLAB facility. Currently around 700 g of spent nuclear fuel dissolved in approx. 30 liters of 8 M nitric acid are stored within the facility. A representative composition of such fuel waste is presented in Table 1.

For the disposal of this waste extensive radiochemical separations are needed. These can be divided into three steps producing separate waste fractions that will be suitable for repository purposes. The first step is the separation of Uranium and Plutonium as the main α-radiation emitting radionuclides from other nuclides. Separations are performed by the solvent extraction technique with use of TBP (tributyl-phosphate) as extracting agent, offering a high selectivity for tetra- and hexavalent actinides over the other oxidation states during the extraction process. Secondly, a group extraction of lanthanides and minor actinides (mainly Americium and Curium) using HDEHP (Di-(2ethylhexyl) phosphoric acid) as extracting agent is performed. Americium and Curium are then separated from the Lanthanides in the selective stripping with DTPA (diethylenetriamine-pentaacetic acid) also known as Talspeak process (1). The stripping solution is further purified with respect to Americium and Curium by the means of extraction chromatography utilizing the DTPA/Ln-resin system. Fission and activation products that are still left in the waste solution after the previous two steps can be further concentrated on a suitable ion exchanger with sufficiently high radiation stability. The procedure for the sorption of nuclides and eventually selective desorption of valuable or rare radionuclides is under development.
  1. Weaver B., Kappelmann F.A., Talspeak: A new method of separating Americium and Curium from an aqueous solution of an aminopolyacetic acid complex with a monoacidic organophosphate or phosphonate. August 1964, Oak Ridge National Laboratory, ORNL-3559

Mit Sidebar

Further Information

  • Head: Dorothea Schumann

Contact

Paul Scherrer Institut
Laboratory of Radiochemistry
Secretariate
OFLB/108

Forschungsstrasse 111
5232 Villigen PSI
Switzerland

Mrs. A. Blattmann
+41 56 310 2401
angela.blattmann@psi.ch

Anfahrt zum PSI

Wie Sie uns finden (Beschreibung und Karte)


LRC Annual Reports

The Annual Reports of the LRC contain accounts of ongoing scientific research and provide an overview of the variety of topics investigated in our laboratory. Until 2015, they comprise results achieved within the former Laboratory for Radio- and Environmental Chemistry (LCH).

top

Fussbereich

Paul Scherrer Institut

Forschungsstrasse 111
5232 Villigen PSI
Schweiz

Telefon: +41 56 310 21 11
Telefax: +41 56 310 21 99

Der Weg zu uns
Kontakt

Besucherzentrum psi forum
Schülerlabor iLab
Zentrum für Protonentherapie
PSI Bildungszentrum
PSI Guest House (in english)
PSI Gastronomie
psi forum-Shop

 

Service & Support

  • Telefonbuch
  • User Office
  • Accelerator Status
  • Publikationen des PSI
  • Lieferanten
  • E-Rechnung
  • Computing
  • Sicherheit

Karriere

  • Arbeiten am PSI
  • Stellenangebote
  • Aus- und Weiterbildung
  • Career Center
  • Berufsbildung
  • PSI Bildungszentrum

Für die Medien

  • Das PSI in Kürze
  • Zahlen und Fakten
  • Mediacorner
  • Medienmitteilungen
  • Social Media

Folgen Sie uns: Twitter (deutsch) LinkedIn Youtube Facebook Instagram Issuu RSS

Footer legal

  • Impressum
  • Nutzungsbedingungen
  • Editoren-Login