Material Buckling Measurements in a Subcritical Assembly

Journal Article · Tue Dec 01 00:00:00 EST 1959 · Nuclear Science and Engineering

OSTI ID:4214052

Uhrig, R. E. ^[1]

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1. Iowa State Univ., Ames, IA (United States)

An alternate method of measuring material buckling in a subcritical assembly is presented. The fundamental mode of the neutron flux is isolated by using the orthogonality introduced when the equation for the neutron flux in a subcritical assembly is multiplied by STAcos pi x/a cos pi y/b dx dy and integrated over the cross-sectional area of the assembly. The resulting double integral is evaluated by measuring the neutron flux at grid points and then employing tabular integration. After neutron flux measurements were taken on two levels, the inverse relaxation length and material buckling can be evaluated. The precision of these determinations are obtained by using the method of propagation of precision indices.

• Research Organization: Iowa State Univ. of Sciences and Technology, Ames, IA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); US Atomic Energy Commission (AEC)
• DOE Contract Number: NONE
• NSA Number: NSA-14-004905
• OSTI ID: 4214052
• Journal Information: Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Vol. 6; ISSN 0029-5639
• Publisher: Taylor & Francis
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BUCKLING
CRITICAL ASSEMBLIES
MEASURED VALUES
NEUTRON FLUX
Nuclear Criticality Safety Program (NCSP)