Nuclear safeguards progress report, July--December 1975
- ed.
The gamma-ray energy region from 120 to 350 keV was investigated using a 1-cc planar Ge(Li) detector. Plutonium isotopic ratios are presented for 0.25 g NBS Standard Reference Material. The results show the feasibility of obtaining /sup 240/Pu and /sup 241/Am isotopic ratios to better than 5 percent of the chemical value by using gamma-ray spectrometers having 600-eV resolution at 122 keV. A single exponential equation has been used to predict the equilibrium of a 1-in. x 3-in. calorimeter (Mound Laboratory Model 100). The formulas necessary for this prediction are presented with some preliminary results. This technique has proved to be successful in significantly reducing the time required to calorimetrically analyze a sample. The installation of the X,Y,Z transporter on a test frame and the computer programs necessary to test it were completed. Tests were performed to determine the sensitivity, thermal resistance, heat distribution error, and reproducibility of the APAS calorimeter. Two computer programs were written to facilitate the handling of inventory verification data. Seventy-nine samples were analyzed using calorimetric assay techniques. The results of the isotopic ratio determinations are presented. The overall uncertainty in the plutonium measurements is less than 1 percent. Gamma-ray spectroscopic techniques were used to measure the isotopic ratios for five ZPPR fuel pins. The data were analyzed using two gaussian fitting programs. The resulting plutonium values determined using gamma-ray isotopic ratios in calorimetric assay are 0.43 percent and 1.2 percent higher than those using chemical isotopic ratios. The contribution from the uncertainty in the gamma-ray isotopic ratios to the overall uncertainty in calorimetric assay is about 0.7 percent.
- Research Organization:
- Mound Plant (MOUND), Miamisburg, OH (United States)
- DOE Contract Number:
- E-33-1-GEN-53
- OSTI ID:
- 7194403
- Report Number(s):
- MLM-2302; TRN: 76-014261
- Country of Publication:
- United States
- Language:
- English
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Progress report for the Division of Safeguards and Security: July--December 1976. [Development of nondestructive assay measurements, systems development, and applications]
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FUEL PINS
GAMMA FUEL SCANNING
PLUTONIUM
GAMMA SPECTROSCOPY
INVENTORIES
SAFEGUARDS
ACCURACY
AMERICIUM 241
CALORIMETERS
CALORIMETRY
ISOTOPE RATIO
NUCLEAR MATERIALS MANAGEMENT
PLUTONIUM 240
RESEARCH PROGRAMS
SENSITIVITY
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ACTINIDES
ALPHA DECAY RADIOISOTOPES
AMERICIUM ISOTOPES
ELEMENTS
EVEN-EVEN NUCLEI
FUEL ELEMENTS
FUEL SCANNING
GAMMA RADIOGRAPHY
HEAVY NUCLEI
INDUSTRIAL RADIOGRAPHY
ISOTOPES
MANAGEMENT
MATERIALS TESTING
MEASURING INSTRUMENTS
METALS
NONDESTRUCTIVE TESTING
NUCLEI
ODD-EVEN NUCLEI
PLUTONIUM ISOTOPES
RADIOISOTOPES
REACTOR COMPONENTS
SPECTROSCOPY
TESTING
TRANSURANIUM ELEMENTS
YEARS LIVING RADIOISOTOPES
055001* - Nuclear Fuels- Safeguards
Inspection
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400103 - Radiometric & Radiochemical Procedures- (-1987)