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Technical Material

Measurement of a very large negative reactivity inserted by rapid withdrawal of a partial fuel loading in Kyoto University Critical Assembly

, , , , , ORCID Icon & ORCID Icon show all
Pages 335-343 | Received 20 Jun 2019, Accepted 23 Aug 2019, Published online: 05 Sep 2019

Figures & data

Figure 1. Description of 1/8″P60EUEU fuel assembly

Figure 1. Description of 1/8″P60EUEU fuel assembly

Figure 2. Top view of A-core configuration and neutron detector location

Figure 2. Top view of A-core configuration and neutron detector location

Figure 3. Schematic view of emergency shutdown system

Figure 3. Schematic view of emergency shutdown system

Figure 4. Description of 7/4″G1/4″P8EUNU fuel assembly

Figure 4. Description of 7/4″G1/4″P8EUNU fuel assembly

Figure 5. Description of 3/8″ P38EU (driver) fuel assembly

Figure 5. Description of 3/8″ P38EU (driver) fuel assembly

Figure 6. Top view of B-core configuration and neutron detector location

Figure 6. Top view of B-core configuration and neutron detector location

Table 1. Delayed neutron data and generation time of the present reactor systems

Figure 7. N and Q decay behavior with withdrawal of central fuel loading in A-core

Figure 7. N and Q decay behavior with withdrawal of central fuel loading in A-core

Figure 8. N and Q decay behavior with withdrawal of central fuel loading in B-core

Figure 8. N and Q decay behavior with withdrawal of central fuel loading in B-core

Figure 9. Transient reactivity behavior obtained by conventional inverse kinetics analysis

Figure 9. Transient reactivity behavior obtained by conventional inverse kinetics analysis

Figure 10. Plot of variables and fitted line on X-Y coordinate for A-core

Figure 10. Plot of variables and fitted line on X-Y coordinate for A-core

Figure 11. Difference of N between FC1 and FC3 under withdrawing central fuel loading

Figure 11. Difference of N between FC1 and FC3 under withdrawing central fuel loading

Figure 12. Plot of variables and fitted line on X-Y coordinate for B-core

Figure 12. Plot of variables and fitted line on X-Y coordinate for B-core

Table 2. Reactivity worth of central fuel loading obtained by the integral count technique [%▵k/k]

Table 3. Reactivity worth of central fuel loading obtained by the least-squares inverse kinetics method [%▵k/k]

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