Development and test of the three-dimensional computer code ZELT-3D for unfolding power distributions using side reflector instrumentation signals

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Nucl. Technol.; (United States)

OSTI ID:5434164

Knob, P J; Neef, R D; Schaai, H

For pebble bed reactors, the problem exists that an in-core instrumentation is not possible. As a flux mapping method, we have developed the three-dimensional code ZELT-3D, which reconstructs the flux distribution in the core using the detector signals of the side reflector instrumentation as input. The results of a calculation utilizing this code and its associated theory for perturbation of flux distributions by absorber rods show that a three-dimensional flux mapping of perturbed fluxes is possible and positions of absorber rod tips can be detected well. We think that this flux mapping method can serve to locate xenon oscillations, misloaded core areas, and broken parts of absorber rods.

• Research Organization: Institut fur Reaktorentwicklung, Kernforschungsanlage Julich GmbH Julich
• OSTI ID: 5434164
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 64:3; ISSN NUTYB
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210400* -- Power Reactors
Nonbreeding
Otherwise Moderated or Unmoderated
COMPUTER CODES
COMPUTERIZED SIMULATION
DATA PROCESSING
DETECTION
FAILED ELEMENT DETECTION
GAS COOLED REACTORS
HOMOGENEOUS REACTORS
MAPPING
NEUTRON ABSORBERS
NEUTRON FLUX
PEBBLE BED REACTORS
PERTURBATION THEORY
POWER DISTRIBUTION
PROCESSING
RADIATION FLUX
REACTOR INSTRUMENTATION
REACTORS
SIMULATION
SOLID HOMOGENEOUS REACTORS
SPECTRA UNFOLDING
THREE-DIMENSIONAL CALCULATIONS
Z CODES