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Title: Evaluation of kalman filters and genetic algorithms for delayed neutron nondestructive assay data analyses.

The ability to nondestructively determine the presence and quantity of fissile/fertile nuclei in various matrices is important in several areas of nuclear applications, including international and domestic safeguards, radioactive waste characterization, and nuclear facility operations. An analysis was performed to determine the feasibility of identifying the masses of individual fissionable isotopes from a cumulative delayed-neutron signal resulting from the neutron irradiation of several uranium and plutonium isotopes. The feasibility of two separate data-processing techniques was studied: Kalman filtering and genetic algorithms. The basis of each technique is reviewed, and the structure of the algorithms as applied to the delayed-neutron analysis problem is presented. The results of parametric studies performed using several variants of the algorithms are presented. The effect of including additional constraining information such as additional measurements and known relative isotopic concentration is discussed. The parametric studies were conducted using simulated delayed-neutron data representative of the cumulative delayed-neutron response following irradiation of a sample containing {sup 238}U, {sup 235}U, {sup 239}Pu, and {sup 240}Pu. The results show that by processing delayed-neutron data representative of two significantly different fissile/fertile fission ratios, both Kalman filters and genetic algorithms are capable of yielding reasonably accurate estimates of the mass of individual isotopesmore » contained in a given assay sample.« less
Authors:
; ;
Publication Date:
OSTI Identifier:
960338
Report Number(s):
ANL/ED/JA-24029
Journal ID: ISSN 0029-5450; NUTYBB; TRN: US200923%%407
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nucl. Technol.; Journal Volume: 122; Journal Issue: 1 ; Apr. 1998
Research Org:
Argonne National Laboratory (ANL)
Country of Publication:
United States
Language:
ENGLISH
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ALGORITHMS; DATA PROCESSING; DELAYED NEUTRONS; DOMESTIC SAFEGUARDS; EVALUATION; FISSION RATIO; GENETICS; IRRADIATION; MATRICES; NEUTRONS; NUCLEI; PLUTONIUM ISOTOPES; PROCESSING; RADIOACTIVE WASTES; URANIUM