the eurisol multi-mw target unit: radiological protection and radiation safety issues
DESCRIPTION
The EURISOL Multi-MW Target Unit: Radiological protection and radiation safety issues. Y. Romanets 1 , R. Luis 1 ,J . Bermudez 3 , J.C. David 5 , D. Ene 5 , I. F. Goncalves 1 , Y. Kadi 2 , C. Kharoua 2 , F. Negoita 4 , R. Rocca 2 , L. Tecchio 3 , P. Vaz 1 - PowerPoint PPT PresentationTRANSCRIPT
THE EURISOL MULTI-MW TARGET UNIT:RADIOLOGICAL PROTECTION AND RADIATION SAFETY ISSUES
Y. Romanets1, R. Luis1,J. Bermudez3, J.C. David5, D. Ene5, I. F. Goncalves1, Y. Kadi2, C. Kharoua2, F. Negoita4, R. Rocca2, L. Tecchio3, P. Vaz1
1ITN - Estrada Nacional 10, 2686-953, Sacavém, Portugal 2CERN- CH-1211, Genève 23, Switzerland
3INFN-LNL - Viale dell'Università, 2 - 35020 Legnaro (PD), Italy4NIPNE - Str. Atomistilor no.407, P.O.BOX MG-6, Bucharest - Magurele, Romania
5CEA - Saclay, DSM/IRFU/SPHN, F-91191 Gif-sur-Yvette, France
SATIF-10, CERN 2-4 June 2010
SATIF-10, CERN 2-4 June 2010
Outline
The EURISOL Project Facility layout
Multi-MW Target Station
Geometry used on the simulations
Calculation results
Conclusions
SATIF-10, CERN 2-4 June 2010
EURISOL-DS European Isotope Separation On-Line Radioactive Ion Beam Facility
The main objectives of the EURISOL Design Study were:
to show the reliability of the next-generation European ISOL Radioactive Ion Beam (RIB) facility as well as the consistence of it’s key elements: driver accelerator, target/ion-source assembly, mass-selection system and instrumentation;
to find the possible cross-interest of the scientific and research areas with other actual European projects and existing laboratory infrastructures;
to come out with the key technologies and the engineering solutions which need to evolve in order to progress on such kind of projects;
SATIF-10, CERN 2-4 June 2010
THE EURISOL FACILITY4 MW Proton Accelerator
(1GeV, up to 4mA)Multi MW Target Station
Mass SeparatorPost Accelerator
SATIF-10, CERN 2-4 June 2010
General layout of the Multi MW Target Station
SATIF-10, CERN 2-4 June 2010
Facility layout including support maintenance spaces
Proton Beam
A
C
B
General view of the facility (implemented (FLUKA) geometry): A – Cut (Plane) perpendicular to the beam, include fission target handling room, RIB extraction elements, fission target end spallation target area. Cut on the point of the beam collision(z=0 cm); B – Zoom of the fission targets and spallation target area; C – Zoom of the fission targets and spallation target areas. Plane parallel to the beam (x=0 cm).
Proton beam
1 m
1 m 1.2 m
SATIF-10, CERN 2-4 June 2010
RESULTS
SATIF-10, CERN 2-4 June 2010
Spallation Target and Fission Targets areasNeutron and photon flux (n*cm-2
*mA-2), FLUKA performed calculationsNeutron flux
Plane z=0
Plane x=0
Photon flux
Plane z=0
Plane x=0
7 m
8 m
10 m
SATIF-10, CERN 2-4 June 2010
Fission Targets Handling RoomNeutron and photon flux (n*cm-2
*mA-2), FLUKA performed calculations
Plane z=0cm
13 m
14 m
Neutron fluxPhoton flux
A B
Particle flux distribution in the Fission Target Handling Room during operation of the facility. Particle fluxes due leaks through the fission products extraction tubes: A – Photon flux distribution; B – Neutron flux distribution;
(n*c
m-2
*mA-2
)
(n*c
m-2
*mA-2
)
SATIF-10, CERN 2-4 June 2010
Fission Targets Handling Room(FLUKA performed calculations)
Plane z=0cmPrompt irradiation
4MW (1GeV*4mA) proton beam
0 day (shutdown time) cooling time
Dose‐E
Q (
Sv*h
‐1)
Dose‐E
Q (
Sv*h
‐1)
Activity (Ci*g‐1), 0 day (shutdown time) cooling time
13 m
14 m
SATIF-10, CERN 2-4 June 2010
Dose Equivalent after ShutdownDose‐EQ (Sv*h‐1)
Plane x=2cm (-1cm:1cm)Plane z=0.8 cm (-0.5cm:0.3cm)0 day (shutdown time) cooling
time
SATIF-10, CERN 2-4 June 2010
Spallation Target and Fission TargetsNeutron flux (n*cm-2
*mA-2), FLUKA performed calculations
Plane x=0cmPlane z=0cm
1 m
1 m 1.2 m
SATIF-10, CERN 2-4 June 2010
Activities after Shutdown (decay contribution after 200 days of irradiation (4MW power proton beam))
Activity (Ci*g‐1) Plane x=2cm (-1cm:1cm)Plane z=0.8 cm (-0.5cm:0.3cm)
0 day (shutdown time) cooling time
1 year cooling time
SATIF-10, CERN 2-4 June 2010
Mercury Loop Trolley
Neutron flux (n/cm2/mA)
prompt irradiation, 1MW (1GeV*1mA) proton
beam
2.5 m
5 m
2.5 m
2.5 m
SATIF-10, CERN 2-4 June 2010
Mercury Loop TrolleyActivities after Shutdown
0 day (shutdown time) cooling time
1 year cooling time
Activity (Ci*g‐1)
SATIF-10, CERN 2-4 June 2010
Dose‐E
Q (
Sv*h
‐1)
Dose‐E
Q (
Sv*h
‐1)
Mercury Loop TrolleyDose Equivalent
Prompt irradiation, 4MW (1GeV*4mA) proton beam
SATIF-10, CERN 2-4 June 2010
Extraction Tubes
SATIF-10, CERN 2-4 June 2010
Extraction Tubes
SATIF-10, CERN 2-4 June 2010
Extraction Tubes
SATIF-10, CERN 2-4 June 2010
CONCLUSIONS
Activation – the key parameter for: Future maintenance of the facility and each sector of it Evaluation of the facility waste production (Type and quantity)
Geometry – needs particular attention on this case because: Main element of the system, extraction tubes, are the source of the
direct neutron leak Due to the necessity of exchanging/replacing various elements of the
system from time to time and to the requirements of the high safety level, the geometry becomes more complicated
Dose - determination of this value is fundamental for: Decision on choice of the access type for the different parts/sectors of the
facility Shielding requirements Conditioning/restrictions on the operation and maintenance of the facility
Project supported by the European Commission under the FP6 “Research Infrastructure Action- Structuring the European Research Area” EURISOL-DS Project Contract no. 515768 RIDS. Part of the work has also been supported by the Portuguese Foundation for the Science and Technology (FCT) in the framework of the projects CERN/FP/83586/2008 and POCI/FP/81951/2007
SATIF-10, CERN 2-4 June 2010
Thank you
SATIF-10, CERN 2-4 June 2010