Obiettivo For the non-destructive examlnation of radioactive waste packages passive and active neutron assay techniques are supposed to be suitable for the determination of fissile material, especially in case of strongly gamma -absorbing matrix material or in the presence of fission and activation products, where gamma measurements need an extremely long time or fail completely. To interprete the results of passive neutron counting correctly the nuclide composition concerning plutonium and other transuranic elements and the chemical environment of alpha emitting nuclides must be known. Furthermore the absorption properties of the matrix have to be considered. In the existing devices the consideration of these effects in evaluation of the measured data has not been taken into account completely. Therefore development and testing of an appropriate interpretation model considering all information available (including other NDT methods) will be realised. To distinguish between sf- and (alpha,n)-neutron emitters the applicability of time correlation methods for typical waste matrices and geometries (e.g. conditioned waste in 200 1 drums) will be studied. Active neutron counting is a well established method in the field of safeguards. However, the determination of fissile material in typical waste containers by this technique is not sufficiently studied yet. Commercially available active neutron interrogation devices do not provide sufficient information from measurement to characterise the waste packages with respect to their neutron moderation and absorption characteristics. To overcome this problems the properties of existing neutron sources and advanced detector configurations have to be considered resulting in an appropriate interpretation model and a recommendation for an appropriate device. Programma(i) EAEC-NFS 2 - Specific research and training programme in the field of nuclear safety and safeguards, 1994-1998 Argomento(i) 030303 - Quality control of nuclear waste packages and waste forms Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore TECHNICAL UNIVERSITY OF MUNICH Contributo UE Nessun dato Indirizzo Walther-Meissner-Strasse 3 85748 Garching Germania Mostra sulla mappa Costo totale Nessun dato Partecipanti (5) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto Agenzia Nazionale per la Protezione dell'Ambiente (ENEA) Italia Contributo UE Nessun dato Indirizzo Via Anguillarese 301 00060 Santa Maria di Galeria Roma Mostra sulla mappa Costo totale Nessun dato Bundesrepublik Deutschland Germania Contributo UE Nessun dato Indirizzo 100,Bundesallee 100 38116 Braunschweig Mostra sulla mappa Costo totale Nessun dato Centre d'Etude de l'Energie Nucléaire- Studiecentrum voor Kernenergie CEN/SCK Belgio Contributo UE Nessun dato Indirizzo 200,Boeretang 2400 Mol Mostra sulla mappa Costo totale Nessun dato Commissariat à l'Energie Atomique Francia Contributo UE Nessun dato Indirizzo Ctr Etudes de Cadarache - CE-CA 13108 Saint-Paul-lez-Durance Mostra sulla mappa Costo totale Nessun dato FORSCHUNGSZENTRUM JUELICH GMBH Germania Contributo UE Nessun dato Indirizzo Wilhelm-Johnen-Straße 52425 Juelich Mostra sulla mappa Costo totale Nessun dato