Design and fabrication of the uranium drum standards
The segmented gamma scanner has become an important instrument for assaying the special nuclear material content of low-density scrap and waste in 55-gal. drums. To perform these assays accurately, we need appropriate standards to calibrate the response of the system including the detector efficiency, the absorber in front of the detector, and the collimator geometry. A set of three uranium drum standards has been fabricated at Los Alamos. This paper discusses a Monte Carlo calculation to optimize the design of the drums. The drum standards are prepared using 20 modular 4-{ell} bottles in each drum. This paper also describes the fabrication procedure, which includes weighing the uranium oxide and the chemical analyzing of the uranium concentration. Also presented is the vertical scanning data of the 4- {ell} bottles to assure uniform mixing of the uranium and the diluent. Finally, the nondestructive measurements for checking consistency among the three drum standards am discussed.
- 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:
- 10177992
- Report Number(s):
- LA-UR-93-2605; CONF-930749-42; ON: DE93018542; TRN: 93:018979
- Resource Relation:
- Conference: 34. annual meeting of the Institute of Nuclear Materials Management,Scottsdale, AZ (United States),18-21 Jul 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CONTAINERS
DESIGN
PERFORMANCE TESTING
MONTE CARLO METHOD
RADIATION DETECTORS
CALIBRATION STANDARDS
URANIUM OXIDES
RADIOACTIVE WASTES
PLUTONIUM
DIATOMACEOUS EARTH
RADIOACTIVE WASTE STORAGE
052002
WASTE DISPOSAL AND STORAGE