| Autor: |
Willard G. Winn |
| Rok vydání: |
1982 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research. 193:251-255 |
| ISSN: |
0167-5087 |
| DOI: |
10.1016/0029-554x(82)90705-4 |
| Popis: |
A prototype instrument for nondestructive gamma-monitoring of plutonium uniformity in fuel tubes has been developed at the Savannah River Laboratory. A 55 cm 3 Ge(li) detector performs assays of PuO 2 density over a range of 0.0 to 1.3 g/cm 3 within gamma-collimated disk volumes with dimensions of 3.2 or 6.4 mm in diameter and 1.9 or 2.9 mm in depth. The attenuation-corrected intensity of the 208 keV gamma ray resulting from 2 to 3% enrichment 241 Pu yields the relative amount of PuO 2 in the assay volume to a precision of 2 to 5%. This accuracy depends on how well the gamma-attentuation effects can be defined. Improved precision is possible by monitoring two gamma rays. the instrument was used to appraise 19 SRP-produced fuel tubes which had high-PuO 2 density regions of “hot spots” (areas ≲65 mm 2 ) and to compare them with acceptance criteria for reactor fuel. Some additional tube nonuniformities were measured to appraise aspects of the tube manufacturing process. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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