Followup calculations for the UVAR LEU conversion

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:505743

Rydin, R A; Hosticka, B; Burns, T ^[1]

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1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Mechanical, Aerospace and Nuclear Engineering; and others

The UVAR reactor was successfully converted to LEU fuel in April 1994. Void coefficient measurements were made on the 4-by-4 fully-graphite-reflected LEU-1 core configuration, and an isothermal temperature coefficient measurement was made on the operational 4-by-5 partially-graphite-reflected LEU-2 core configuration. Both of these experiments have now been modeled in their critical configurations using the 3DBUM code. The LEU cores were also modeled using the Monte Carlo code MCNP in order to obtain a neutron/gamma source for BNCT filter design calculations. Advanced BNCT filters have been evaluated using both MCNP and the discrete ordinates code DORT. The results indicate that the UVAR would be an ideal source for the BNCT treatment of brain tumors.

• Research Organization: Oak Ridge Inst. for Science and Education, TN (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
• DOE Contract Number: AC05-76OR00033
• OSTI ID: 505743
• Report Number(s): DOE/OR/00033--T690; CONF-9509253--18; ON: DE97053099
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
99 GENERAL AND MISCELLANEOUS
D CODES
DESIGN
DISCRETE ORDINATE METHOD
EPITHERMAL NEUTRONS
FILTERS
NEUTRON BEAMS
NEUTRON LEAKAGE
REACTOR CORES
UVAR REACTOR
VOID COEFFICIENT