Sensitivity and uncertainty analysis of the Coupled Fast Reactivity Measurements Facility central flux spectrum

Journal Article · Thu Apr 01 04:00:00 EST 1982 · Nucl. Technol.; (United States)

OSTI ID:6834834

Ryskamp, J M; Andrel, R A; Broadhead, B L; Ford, W E; Lucius, J L; Marable, J H; Wagschal, J J

The Coupled Fast Reactivity Measurements Facility (CFRMF) is a zoned-core critical assembly with a fast neutron spectrum zone in the center of an enriched /sup 235/U, water-moderated thermal driver. The central neutron field is a Cross-Section Evaluation Working Group benchmark for data testing of fission product, actinide, and dosimetry cross sections important to fast reactor technology. The AMPX and FORSS code systems were used to determine a covariance matrix for the CFRMF central neutron spectrum. The covariance matrix accounts for neutron cross section and fission spectrum uncertainties and correlations. Uncertainties in the /sup 238/U inelasticscattering cross sections and in the /sup 235/U fission spectrum were found to contribute most to the standard deviations in the central flux spectrum. The flux-spectrum covariance matrix contains strong correlations. This strongly motivates including the off-diagonal elements in data testing and cross section adjustment applications. The flux spectrum covariance matrix was applied in this work for integral data testing for dosimeter cross sections.

• Research Organization: EG and G Idaho, Inc. P.O. Box 1625, Idaho Falls, Idaho 83415
• OSTI ID: 6834834
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 57:1; ISSN NUTYB
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
220600* -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
A CODES
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
CFRMF REACTOR
COMPUTER CODES
CORRECTIONS
CORRELATIONS
CROSS SECTIONS
DATA COVARIANCES
DOSEMETERS
EPITHERMAL REACTORS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL REACTORS
F CODES
FAST REACTORS
FISSION SPECTRA
HEAVY NUCLEI
INELASTIC SCATTERING
INFORMATION VALIDATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATRICES
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NEUTRON FLUX
NEUTRON SPECTRA
NUCLEI
PERFORMANCE TESTING
RADIATION FLUX
RADIOISOTOPES
REACTORS
RESEARCH AND TEST REACTORS
SCATTERING
SENSITIVITY ANALYSIS
SPECTRA
TESTING
URANIUM 235
URANIUM 238
URANIUM ISOTOPES
VALIDATION
YEARS LIVING RADIOISOTOPES
ZERO POWER REACTORS