Design and fabrication of NDA standards
Conference
·
OSTI ID:219382
The Plutonium Facility, TA-55, at Los Alamos National Laboratory is currently producing NDA calibration standards used by various laboratories in the DOE complex. These NIST traceable standards have been produced to calibrate NDA instruments for accountability measurements used for resolving shipper/receiver differences, and for accountability in process residues and process waste. Standards are needed to calibrate various NDA (Non-destructive Assay) instruments such as neutron coincidence counters, gamma-ray counters, and calorimeters. These instruments measure various ranges of nuclear material being produced in the DOE nuclear community. Los Alamos National Laboratory has taken a lead role in fabrication of uranium and plutonium standards, along with other actinides such as neptunium and americium. These standards have been fabricated for several laboratories within the complex. This paper will summarize previous publications detailing the careful planning encompassing components such as precise weighing, destructive analysis, and the use of post fabrication NDA measurements to confirm that the standards meet all preliminary expectations before use in instrument calibration. The paper will also describe the specialized containers, diluents, and the various amount of nuclear materials needed to accommodate the calibration ranges of the instruments.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 219382
- Report Number(s):
- LA-UR--96-1013; CONF-960376--10; ON: DE96008153
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
05 NUCLEAR FUELS
40 CHEMISTRY
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
CALIBRATION STANDARDS
CALORIMETERS
COINCIDENCE METHODS
DESIGN
FABRICATION
GAMMA DETECTION
INVENTORIES
MATERIALS HANDLING
NEUTRON DETECTORS
NONDESTRUCTIVE ANALYSIS
NUCLEAR MATERIALS MANAGEMENT
SHIPPER-RECEIVER DIFFERENCES
40 CHEMISTRY
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
CALIBRATION STANDARDS
CALORIMETERS
COINCIDENCE METHODS
DESIGN
FABRICATION
GAMMA DETECTION
INVENTORIES
MATERIALS HANDLING
NEUTRON DETECTORS
NONDESTRUCTIVE ANALYSIS
NUCLEAR MATERIALS MANAGEMENT
SHIPPER-RECEIVER DIFFERENCES