Reconstitution and Upgrade of the Thermal Neutron Irradiation Facility in the Basement Medical Room of the MIT Research Reactor

Harling, Otto, K. ; Riley, Kent, J. ; Binns, Peter J.

Massachusetts Institute of Technology, Cambridge, MA (United States)

关键词: Boron Neutron Capture Therapy;    Basements;    Beam Monitoring;    Irradiation;    Shielding;   

DOI  :  10.2172/824507
RP-ID  :  NONE
RP-ID  :  FG02-00ER62983
RP-ID  :  824507

美国|英语

来源: UNT Digital Library

【 摘 要 】

The M-011 thermal neutron beam has been reconstituted and upgraded to provide a high intensity and high quality facility for preclinical and certain clinical studies. Intensities of thermal neutrons in the beam range from 5.0-8.5 x 109 n cm-2 s-1. Beam contamination is at a low level where it has no practical influence on beam performance. New computer controlled dose and beam monitoring systems have been implemented which assure precise dose delivery and redundant safety interlocks. An additional beam shutter and massive shielding in the back of the medical room have been added which significantly reduce room background and now permit staff entry without the necessity for lowering the reactor power. This system is needed for BNCT research by the MIT group as well as other US groups. This need became acute with the closure of the BMRR which previously had the only high quality thermal neutron irradiation facility for BNCT in the USA.