Radiation Safety System for SPIDER Neutral Beam Accelerator

Journal Article · Tue Dec 13 04:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3665342· OSTI ID:22003944

Sandri, S; Poggi, C ^[1]; Coniglio, A ^[2]; D'Arienzo, M ^[3]

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1. ENEA, Radiation Protection Institute, IRP-FUAC, Frascati (Italy)
2. Medical Physics Department, S. Giovanni Calibita Hospital, Fatebenefratelli, Isola Tiberina, Roma (Italy)
3. ENEA, Ionizing Radiation Metrology National Institute, METR, Casaccia, Rome (Italy)

SPIDER (Source for Production of Ion of Deuterium Extracted from RF Plasma only) and MITICA (Megavolt ITER Injector Concept Advanced) are the ITER neutral beam injector (NBI) testing facilities of the PRIMA (Padova Research Injector Megavolt Accelerated) Center. Both injectors accelerate negative deuterium ions with a maximum energy of 1 MeV for MITICA and 100 keV for SPIDER with a maximum beam current of 40 A for both experiments. The SPIDER facility is classified in Italy as a particle accelerator. At present, the design of the radiation safety system for the facility has been completed and the relevant reports have been presented to the Italian regulatory authorities. Before SPIDER can operate, approval must be obtained from the Italian Regulatory Authority Board (IRAB) following a detailed licensing process. In the present work, the main project information and criteria for the SPIDER injector source are reported together with the analysis of hypothetical accidental situations and safety issues considerations. Neutron and photon nuclear analysis is presented, along with special shielding solutions designed to meet Italian regulatory dose limits. The contribution of activated corrosion products (ACP) to external exposure of workers has also been assessed. Nuclear analysis indicates that the photon contribution to worker external exposure is negligible, and the neutron dose can be considered by far the main radiation protection issue. Our results confirm that the injector has no important radiological impact on the population living around the facility.

• OSTI ID: 22003944
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1412; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
61 RADIATION PROTECTION AND DOSIMETRY
ACCELERATOR FACILITIES
ANIONS
BEAM CURRENTS
BEAM EXTRACTION
BEAM INJECTION
CYCLOTRONS
DEUTERIUM IONS
DOSE LIMITS
KEV RANGE
MEV RANGE
NEUTRON SOURCES
NEUTRONS
PERSONNEL
PHOTONS
RADIATION DOSES
RADIATION PROTECTION
SHIELDING