| Autor: |
David L. Chichester, William A. Noonan, Mathew T. Kinlaw, Scott M. Watson, Jeffrey M. Kalter, Eric C. Miller |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). |
| DOI: |
10.1109/nssmic.2014.7431085 |
| Popis: |
A series of experiments and numerical simulations using thermal-neutron time-correlated measurements has been performed to determine the neutron multiplication, M, of assemblies of highly-enriched uranium available at Idaho National Laboratory. The experiments used up to 14.4 kg of highly-enriched uranium, including bare assemblies and assemblies reflected with high-density polyethylene, carbon steel, and tungsten. A small 252Cf source was used to initiate fission chains within the assembly. Both the experiments and the simulations used 6-channel and 8-channel detector systems, each consisting of 3He proportional counters moderated with polyethylene; data was recorded in list mode for analysis. ‘True’ multiplication values for each assembly were empirically derived using basic neutron production and loss values determined through simulation. A total of one-hundred sixteen separate measurements were performed using fifty-seven unique measurement scenarios, the multiplication varied from 1.75 to 10.90. This paper presents the results of these comparisons and discusses differences among the various cases. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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