TASK 4 - Fission Target

eurisol ds
Engineering design and prototyping of the UCx target and ion source module coupled with the high power converter target and remote handling system, design of the target shape for optimum irradiation. A high Z solid converter will also be investigated. top
PUBLICATIONS: INTERNAL TASK NOTE
Design of 1+ Ion Source Coupling First Design of the Resonant Ionization Laser Ion Source For the Multi-Mega Watt Target Station

21/09/2009 -Task : TASK 4
Author(s) :A. Olivier-Kaiser, F. Le Blanc, C. Lau

The realisation of next-generation ion sources suitable for the EURISOL multi-mega-watt (MMW) target station needs exhaustive studies and developments. An exhaustive review was carried out to evaluate the capability of the ion-sources to operate under the irradiation conditions of the MMW target station. In addition, selectivity must be taken into account to avoid the spread of unwanted radioactivity out of the target-ion-source system (TIS). These studies led to consider RILIS (Resonance Ionization Laser Ion Source) as the reference ion source for this target station.
Improved Design of EURISOL Fission Target Systems and Handling

08/07/2009 -Task : TASK 4
Author(s) :F. Negoita, L. Serbina, E. Udup, O. Alyakrinskiy, M. Barbui, J. Bermudez, L.B. Tecchio, Y. Kadi, C. Kharoua, Y. Romanets

The report discusses the constraints, solutions and options for integration of the main systems needed to assure the operation and maintenance/exchange of the fission target – ion sources assemblies capable to withstand very high neutron fluxes around EURISOL multi-MW neutron converter, to provide the desired fission rate of 10e15 fis./sec. and to extract with highest possible efficiencies the fission products as radioactive ion beam. Adapting the concepts developed for a single fission target within PIAFE and MAFF projects, simultaneous operation of six fission targets was proposed for EURISOL. A first design following these concepts was presented in a previous report. Here we describe several improvements implemented in the design for a more efficient, more reliable and safer operation. An optimized layout of the part of the EURISOL MMW station related to fission target services and handling is proposed as well.
FISSION TARGET DESIGN AND INTEGRATION OF NEUTRON CONVERTER FOR EURISOL-DS PROJECT

08/07/2009 -Task : TASK 4
Author(s) :J. Bermudez, O. Alyakrinskiy, M. Barbui, F. Negoita, L. Serbina, L.B. Tecchio, E. Udup

A study of a new fission target for EURISOL-DS is presented with a detailed description of the target. Calculations of several configurations were done using Monte Carlo code FLUKA aimed to obtaining 1015 fissions/s on single target. In Eurisol, neutrons inducing the fission reactions are produced by a proton beam 1GeV-4mA interacting with a mercury converter. The target configuration was customized to gain fission yield from the large amount of low energy neutrons produced by the Hg converter. To this purpose, the fissile material is composed by discs of 238-Uranium carbide enriched with 15 g of 235-U. Studies of several geometries were done in order to define the shape and composition of uranium target, taking into account the mechanical and space constraints
Investigation on Ion Source Parameters

07/07/2009 -Task : TASK 4
Author(s) :M. Cheikh Mhamed, S. Essabaa, C. Lau

The EURISOL multi-mega-watt target station requires dedicated radioactive ion sources. Notably, they must be capable of operating under extremely hard radiations and with a larger fission target producing over 1014 fissions/s. The realisation of next-generation ion sources suitable for such operating conditions needs exhaustive studies and developments. In order to take up such a challenge, a review on radioactive ion sources was achieved and the investigation on ion source parameters was in particular focused on a plasma ion source through a R&D program.
Design of 1+ Ion Source Coupling First Design of the Resonant Ionization Laser Ion Source For the Multi-Mega Watt Target Station

07/07/2009 -Task : TASK 4
Author(s) :A. Olivier, F. Le Blanc, C. Lau

The realisation of next-generation ion sources suitable for the EURISOL multi-mega-watt (MMW) target station needs exhaustive studies and developments. An exhaustive review was carried out to evaluate the capability of the ion-sources to operate under the irradiation conditions of the MMW target station. In addition, selectivity must be taken into account to avoid the spread of unwanted radioactivity out of the target-ion-source system (TIS). These studies led to consider RILIS (Resonance Ionization Laser Ion Source) as the reference ion source for this target station.
Fission Target - Data Base Parameters

19/03/2009 -Task : TASK 4
Author(s) :L.B. Tecchio

List of parameters concerning the Fission Target
EURISOL Fission Target Design adapting MAFF concept

12/12/2007 -Task : TASK 4
Author(s) :O. Alyakrinskiy, M. Barbui, L.B. Tecchio (INFN-Legnaro) F. Negoita, L. Serbina, E. Udup (NIPNE-Bucharest)

The first two version of design as described in “Fission Target Design” report available on Task 4 pages on EURISOL web-site (http://www.eurisol.org), integrating a number of eight fission targets and ion sources around the multiMW Hg target inside one large vacuum vessel, have raised several concerns about the viability of the concept. Following the decision of EURISOL-DS Management Board, the adaptation of solutions proposed for MAFF project was studied from different points of view within tasks 2-4. In the present report, the new engineering design coming out form these studies is described and discussed.
Fission Target Design

18/10/2007 -Task : TASK 4
Author(s) :F. Negoita, L. Serbina, L. Tecchio, E. Udup

The report describes the technical concepts and the main parameters adopted for the first design for the fission target of the multi-MW Target Station of EURISOL. Starting from the dimensions of liquid neutron converter as defined by Baseline Design, eight fission target containers were disposed around the converter and closely coupled to eight ion-sources. Two versions of design are presented , proposing different solutions at all levels: target geometry, heating resistance, thermal expansion compensation, supporting in the view of remote handling, type of ion source, current and high voltage powering scheme, cooling and others. At this stage of design many details are skipped, while the dimensions of different components are not yet the result of mechanical/electrical/thermal calculations.
Detailed thermal stress analysis of EURISOL Fission target-First concept

06/09/2007 -Task : TASK 4
Author(s) :Emeric Brun

A first concept for the fission boxes of the planned EURISOL facility is analysed from a thermal and structural point of view. The fission boxes in this facility consists in stacks of uranium carbide sheets surrounded by tantalum blanket which are all cooled through radiative heat exchange with a convectively cooled outer stainless steel container.
Neutronic Calculations for the EURISOL-DS Fission Target

06/09/2007 -Task : TASK 4
Author(s) :Luca Zanini

Neutronic calculations for the EURISOL-DS fission target have been performed using the FLUKA code. The design is based on the reference (the so-called Intermediate Solution) mercury neutron converter, surrounded by eight uranium carbide fission targets. The power deposited in the fission target, and the number of fissions produced in-target, are calculated and compared with previous calculations based on preliminary fission target designs. Due to the bigger distance from the center of the target in the present design, and to the lower impact of the reflector, the performance of the fission target is lower than found in previous calculations. The number of fissions per box is 9.6×1013 fissions/box/4MW. A power deposition of 4.3 W/cm3/ 4 MW was found, which is also lower than previous results. The power deposition results have been used as inputs for thermo-mechanical calculations.
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