title: The TRADE experiment: shielding calculations for the building hosting the subcritical system.
abstract: The TRADE project (TRiga Accelerator Driven Experiment), to be performed at the existing TRIGA reactor at ENEA Casaccia, has been proposed as a validation of the accelerator-driven system (ADS) concept. TRADE will be the first experiment in which the three main components of an ADS--the accelerator, spallation target and sub-critical blanket--are coupled at a power level sufficient to encounter reactivity feedback effects. As such, TRADE represents the necessary intermediate step in the development of hybrid transmutation systems, its expected outcomes being considered crucial--in terms of proof of stability of operation, dynamic behaviour and licensing issues--for the subsequent realisation of an ADS Transmutation Demonstrator. An essential role in the feasibility study of the experiment is played by radioprotection calculations. Such a system exhibits new characteristics with respect to a traditional reactor, owing to the presence of the proton accelerator. As beam losses always occur under normal operating conditions of an accelerator, shielding studies need to be performed not only around the reactor but also along the beam line from the accelerator to the spallation target. This paper illustrates a preliminary evaluation, using Monte Carlo methods, of the additional shielding to be located around the reactor structures, the beam transport line and the existing reactor building to allow access into the reactor hall and to restrict the doses outside to their legal limits.
authors.affiliation: ENEA FIS-NUC, Via M. Monte Sole 4, 40129 Bologna, Italy.
authors.forename: K W
authors.initials: KW
authors.lastname: Burn
authors.forename: M
authors.initials: M
authors.lastname: Carta
authors.forename: L
authors.initials: L
authors.lastname: Casalini
authors.forename: Y
authors.initials: Y
authors.lastname: Kadi
authors.forename: S
authors.initials: S
authors.lastname: Monti
authors.forename: E
authors.initials: E
authors.lastname: Nava
authors.forename: M
authors.initials: M
authors.lastname: Palomba
authors.forename: C
authors.initials: C
authors.lastname: Petrovich
authors.forename: L
authors.initials: L
authors.lastname: Picardi
authors.forename: C
authors.initials: C
authors.lastname: Rubbia
authors.forename: F
authors.initials: F
authors.lastname: Troiani
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design / Q000379:methods; D019544:Equipment Failure Analysis / Q000379:methods; D005160:Facility Design and Construction / Q000295:instrumentation / Q000379:methods*; D005720:Gamma Rays; D008962:Models, Theoretical; D009502:Neutrons; D010315:Particle Accelerators / Q000295:instrumentation*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods*; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D017356:Synchrotrons / Q000295:instrumentation*