Subcriticality-Level Evaluation in Accelerator-Driven Systems by Harmonic Modulation of the External Source
| Autor: | Mario Carta, A. D'Angelo |
|---|---|
| Přispěvatelé: | D'Angelo, A., Carta, M. |
| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Physics
Multi-mode optical fiber Nuclear transmutation 010308 nuclear & particles physics Fuel cycle Nuclear engineering 0211 other engineering and technologies 02 engineering and technology External source 01 natural sciences Nuclear magnetic resonance Nuclear Energy and Engineering 0103 physical sciences Modulation (music) Calibration Harmonic Neutron source 021108 energy Fisica del reattore |
| Popis: | Accelerator-driven systems (ADS) for nuclear waste transmutation will periodically need absolutely calibrated measurements of the subcriticality level. These measurements will allow both the check of the subcriticality margin during the ADS operation life and the related comparison between the experimental and foreseen fuel cycle reactivity effect. Until now, the possibility of absolute (source-jerk-type) reactivity measurements, to be made just after external source breakoff, has been mentioned in ADS proposals. Complementary reactivity measurement techniques are investigated to analyze the ADS response to harmonic modulation of the external neutron source. The point-kinetics approximation is used to test the method by numerical simulations. To take into account spatial effects, a multimode case is finally investigated. Results show that in the case ofADS subcritical systems, the theory of an absolute reactimeter may be formulated. The need for explicit transport calculations, before any possible experimental validation, is also mentioned. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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