TREAT fast-neutron hodoscope: improvements in time and mass resolution of fuel motion

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6786663

Rhodes, E; DeVolpi, A; Fink, C; Stanford, G; Pecina, R; Travis, D; Kash, R

The fast-neutron hodoscope at the Transient Reactor Test Facility detects fuel motion in thick opaque capsules during in-core destructive transient tests. Counts from several hundred detectors, each with rates up to a megahertz, are collected at intervals as short as a millisecond for up to tens of seconds. The large amount of data must be decoded, normalized, represented in suitable forms, and analyzed. A computer-controlled magnet disk data acquisition system has been installed which provides shorter data collection intervals, simplifies decoding, and permits immediate data analysis. Data normalizations and representations have been developed which significantly increase the dynamic range, yield sensitive quantitative indications of fuel mass motion, and render the data intuitively comprehensible. The improved hodoscope system performance level is demonstrated by results from a recent transient test, Pinex-2, which show the quantitative evolution of fuel mass motion from 1515 MW peak reactor power through a 1 MW post-scram radiation level.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6786663
• Report Number(s): CONF-781033-18
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
220600* -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACCIDENTS
AIR COOLED REACTORS
BARYONS
ELEMENTARY PARTICLES
ENRICHED URANIUM REACTORS
EXPERIMENTAL REACTORS
FAST NEUTRONS
FERMIONS
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HADRONS
HODOSCOPES
HOMOGENEOUS REACTORS
MASS RESOLUTION
MELTDOWN
NEUTRONS
NUCLEONS
PERFORMANCE
REACTOR ACCIDENTS
REACTOR INSTRUMENTATION
REACTORS
RESEARCH AND TEST REACTORS
RESOLUTION
SIMULATION
SOLID HOMOGENEOUS REACTORS
TEST REACTORS
THERMAL REACTORS
TIME RESOLUTION
TIMING PROPERTIES
TREAT REACTOR