Nondestructive assay measurements in support of HEU suspension at the Portsmouth Gaseous Diffusion Plant

Book · Fri Dec 31 04:00:00 EST 1993

OSTI ID:61406

Mayer, II, R L; Bailey, J; Hagenauer, R C ^[1]; McGinnis, B R; Royce, R R ^[2]

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1. K-25 Site, Oak Ridge, TN (United States). Nondestructive Assay Dept.
2. Portsmouth Gaseous Diffusion Plant, Piketon, OH (United States). Applied Nuclear Technology Dept.

Production of highly enriched uranium at the Portsmouth Gaseous Diffusion Plant is being suspended. Nondestructive assay measurements are being conducted in support of the HEU Suspension Project to meet criticality safety and safeguards requirements. The measurement approach is to perform passive neutron and gamma-ray measurements from outside the equipment enclosures to quantify residual uranium deposits contained in each piece of process equipment scheduled for shutdown. Additional measurements will be performed from inside of the enclosures for all pieces of process equipment which exceed threshold quantities. High-resolution gamma-ray measurements are performed to determine {sup 235}U enrichment and {sup 234}U concentrations. A locate and quantify method is used to measure process piping. Gamma-ray scanning is used to locate deposits exceeding a threshold value and a combination of gamma-ray and neutron measurement methods are used to quantify residual deposits.

• OSTI ID: 61406
• Report Number(s): CONF-930749--
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
40 CHEMISTRY
CALIBRATION
DATA COVARIANCES
DECOMMISSIONING
DEPOSITS
EXPERIMENTAL DATA
GAMMA DETECTION
HIGHLY ENRICHED URANIUM
NEUTRON DETECTION
NONDESTRUCTIVE ANALYSIS
NUCLEAR MATERIALS MANAGEMENT
PORTSMOUTH GASEOUS DIFFUSION PLANT
RADIOISOTOPE SCANNING
RADIOMETRIC ANALYSIS
SURPLUS NUCLEAR FACILITIES
URANIUM 234
URANIUM 235