Enhancement of the epithermal neutron beam at the Brookhaven Medical Research Reactor

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6821042

Liu, Hungyuan B; Brugger, R M; Rorer, D C

Improvements for the Brookhaven Medical Research Reactor (BMRR) epithermal neutron beam have been evaluated by MCNP calculations and measurements. Different dosimetric measurements have been made after one fuel element was in place of the graphite stringer in the core. Measurements show an 18% increase of beam intensity without reducing the beam quality. These results are consistent with the predictions of an MCNP calculation. Major changes to enhance the beam include rearranging the fuel elements in the core, placing aluminum pellets in the moderator tank C, redesigning the moderator assembly, replacing the outer bismuth by lead plus 0.05% atomic number density of [sup 6]Li, and modifying the irradiation port to accommodate an air indentation. The MCNP calculated values for the present and new designs were compared to demonstrate the improvements. The results show that the epithermal flux can be increased by 80% at the irradiation port. The neutron dose per epithermal neutron can be reduced by 30%. The beam directionality can be improved by 7%.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6821042
• Report Number(s): BNL-48184; CONF-9209280--4; ON: DE93005580
• Country of Publication: United States
• Language: English

Related Subjects

550603* -- Medicine-- External Radiation in Therapy-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
BARYONS
BEAMS
ELEMENTARY PARTICLES
EPITHERMAL NEUTRONS
FERMIONS
HADRONS
MEDICINE
MODERATORS
NEUTRON BEAMS
NEUTRON FLUX
NEUTRON THERAPY
NEUTRONS
NUCLEAR MEDICINE
NUCLEON BEAMS
NUCLEONS
PARTICLE BEAMS
RADIATION FLUX
RADIOLOGY
RADIOTHERAPY
SHIELDS
THERAPY