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Title: Reactor physics input to the safety analysis report for the High Flux Isotope Reactor

Abstract

HFIR specific, few group neutron and coupled neutron-gamma libraries have been prepared. These are based on data from ENDF/B-V and beginning-of-life (BOL) conditions. The neutron library includes actinide data for curium target rods. Six critical experiments, collectively designated HFIR critical experiment 4, were analyzed. Calculated k-effective was 2% high at BOL-typical conditions but was 1.0 at end-of-life-typical conditions. The local power density distributions were calculated for each of the critical experiments. The axially averaged values at a given radius were frequently within experimental error. However at individual points, the calculated local power densities were significantly different from the experimentally derived values (several times greater than experimental uncertainty). A reassessment of the foil activation data with transport theory techniques seems desirable. Using the results of the critical experiments study, a model of current HFIR configuration was prepared. As with the critical experiments, BOL k-effective was high (3%). However, end-of-life k-effective was high (2%). The end-of-life concentrations of fission products were compared to those generated using the ORIGEN code. Agreement was generally good through differences in the inventories of some important nuclides, Xe and I, need to be understood. End-of-cycle curium target isotopics based on measured, discharged target rods were compared tomore » calculated values and agreement was good. Axial flux plots at various irradiation positions were generated. Time-dependent power distributions based on two-dimensional calculations were provided.« less

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5780442
Report Number(s):
ORNL/TM-11956
ON: DE92010369
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; HFIR REACTOR; REACTOR PHYSICS; SAFETY ANALYSIS; ACTINIDES; CROSS SECTIONS; FISSION PRODUCTS; IODINE; NUCLEAR DATA COLLECTIONS; POWER DENSITY; POWER DISTRIBUTION; REACTOR KINETICS; SAFETY REPORTS; TRANSPORT THEORY; XENON; ELEMENTS; ENRICHED URANIUM REACTORS; FLUIDS; GASES; HALOGENS; IRRADIATION REACTORS; ISOTOPE PRODUCTION REACTORS; ISOTOPES; KINETICS; MATERIALS; METALS; NONMETALS; PHYSICS; RADIOACTIVE MATERIALS; RARE GASES; REACTORS; RESEARCH AND TEST REACTORS; RESEARCH REACTORS; TANK TYPE REACTORS; TEST REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 220600* - Nuclear Reactor Technology- Research, Test & Experimental Reactors; 220100 - Nuclear Reactor Technology- Theory & Calculation

Citation Formats

Primm, III., R. T. Reactor physics input to the safety analysis report for the High Flux Isotope Reactor. United States: N. p., 1992. Web. doi:10.2172/5780442.
Primm, III., R. T. Reactor physics input to the safety analysis report for the High Flux Isotope Reactor. United States. https://doi.org/10.2172/5780442
Primm, III., R. T. 1992. "Reactor physics input to the safety analysis report for the High Flux Isotope Reactor". United States. https://doi.org/10.2172/5780442. https://www.osti.gov/servlets/purl/5780442.
@article{osti_5780442,
title = {Reactor physics input to the safety analysis report for the High Flux Isotope Reactor},
author = {Primm, III., R. T.},
abstractNote = {HFIR specific, few group neutron and coupled neutron-gamma libraries have been prepared. These are based on data from ENDF/B-V and beginning-of-life (BOL) conditions. The neutron library includes actinide data for curium target rods. Six critical experiments, collectively designated HFIR critical experiment 4, were analyzed. Calculated k-effective was 2% high at BOL-typical conditions but was 1.0 at end-of-life-typical conditions. The local power density distributions were calculated for each of the critical experiments. The axially averaged values at a given radius were frequently within experimental error. However at individual points, the calculated local power densities were significantly different from the experimentally derived values (several times greater than experimental uncertainty). A reassessment of the foil activation data with transport theory techniques seems desirable. Using the results of the critical experiments study, a model of current HFIR configuration was prepared. As with the critical experiments, BOL k-effective was high (3%). However, end-of-life k-effective was high (2%). The end-of-life concentrations of fission products were compared to those generated using the ORIGEN code. Agreement was generally good through differences in the inventories of some important nuclides, Xe and I, need to be understood. End-of-cycle curium target isotopics based on measured, discharged target rods were compared to calculated values and agreement was good. Axial flux plots at various irradiation positions were generated. Time-dependent power distributions based on two-dimensional calculations were provided.},
doi = {10.2172/5780442},
url = {https://www.osti.gov/biblio/5780442}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 1992},
month = {Sun Mar 01 00:00:00 EST 1992}
}