Guifeng ZHU, Rui YAN, Yang ZOU, Changqing YU, Xuechao ZHAO, Jian GUO. Toward the instantaneous short reactor period and rate constraint of reactivity insertion[J]. NUCLEAR TECHNIQUES, 2024, 47(3): 030601
- NUCLEAR TECHNIQUES
- Vol. 47, Issue 3, 030601 (2024)
Fig. 1. Neutron density and reactor period curves during the step insertion of reactivity from -1× 10-3 to 1× 10-3
Fig. 2. Variation curves of reactor period under different insertion rates of reactivity from -5× 10-4 to 5× 10-4 and from 5× 10-4 to 1× 10-3 (color online)
Fig. 3. Variation curves of reactor period and rising periods of delayed neutron precursors during the step insertion of reactivity from -1× 10-3 to 1× 10-3 (color online)
Fig. 4. Reactivity state and limit of reactivity insertion rate curve under different aims of shortest reactor double periods
Fig. 5. Reactor double period curves during reactivity change from -9×10-3 to 1×10-3 (each 1×10-3 insertion with speed of 33.0×10-5 s-1, 29.5×10-5 s-1, 26.1×10-5 s-1, 22.6×10-5 s-1, 19.1×10-5 s-1, 15.7×10-5 s-1, 12.2×10-5 s-1, 8.7×10-5 s-1, 5.3×10-5 s-1, and 1.8×10-5 s-1, and interval time of 10 s and 100 s)
Fig. 6. Reactor double period curves during reactivity change from -9×10-3 to 1×10-3 (each 1×10-3 insertion with interval time of 100 s and aim reactor double period of 20 s, 40 s, and 60 s)
Fig. 7. Reactor and double period curves of DNPs during reactivity change from -4.0×10-4 to 1.40×10-3 (each 2.0×10-4 insertion with interval time of 100 s and aim reactor double period of 20 s)
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Table 1. DNP double period and processing error for different aimed reactivity cases
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