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NUCLEAR TECHNIQUES, Volume. 47, Issue 3, 030601(2024)

Toward the instantaneous short reactor period and rate constraint of reactivity insertion

Guifeng ZHU1,2, Rui YAN1,2, Yang ZOU1,2、*, Changqing YU1, Xuechao ZHAO1, and Jian GUO1,2
Author Affiliations
  • 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (8)
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    References (16)
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    Figures & Tables(8)
    Neutron density and reactor period curves during the step insertion of reactivity from -1×10-3 to 1×10-3

    Fig. 1. Neutron density and reactor period curves during the step insertion of reactivity from -1×10-3 to 1×10-3

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    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. 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)

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    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. 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)

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    Reactivity state and limit of reactivity insertion rate curve under different aims of shortest reactor double periods

    Fig. 4. Reactivity state and limit of reactivity insertion rate curve under different aims of shortest reactor double periods

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    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. 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)

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    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. 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)

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    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)

    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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      Table 1. DNP double period and processing error for different aimed reactivity cases

      ρ / 10-5Td / sTc,1 / sTc,2 / sTc,3 / sTc,4 / sTc,5 / sTc,6 / s

      ∑λiβi(Tλi+1

      / 10-5 s-1

      、      		∑λiβi(Tλi+1-∑λiβi(Tc,iλi+1βeffT-∑λiβi(Tc,iλi+1 / %
      -2042.5140.0160.0109.066.044.641.85.628.4
      043.1168.0163.0105.064.645.442.95.628.3
      2044.0152.0139.092.259.644.642.66.027.6
      4045.1121.0108.075.952.942.341.06.826.2
      6041.089.480.360.145.438.737.87.924.1
      8033.664.158.546.538.034.233.69.520.9
      10029.745.842.535.731.429.629.311.416.6
      12025.233.331.428.026.225.425.213.611.3
      14021.824.323.522.522.121.921.815.94.7

      假设值

      Supposed period

      		20.020.020.020.020.020.020.017.30.0
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    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

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    Paper Information

    Category: Research Articles

    Received: Aug. 10, 2023

    Accepted: --

    Published Online: Apr. 29, 2024

    The Author Email: ZOU Yang (ZOUYang)

    DOI:10.11889/j.0253-3219.2024.hjs.47.030601

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology