Influences of blast wave on dose field of delayed neutron

Hu Jiaqi; Shang Peng; Zhu Jinhui; Zuo Yinghong; Liu Li; Niu Shengli

doi:10.11884/HPLPB202537.250222

Article Contents

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Hu Jiaqi, Shang Peng, Zhu Jinhui, et al. Influences of blast wave on dose field of delayed neutron[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250222

Citation:

Hu Jiaqi, Shang Peng, Zhu Jinhui, et al. Influences of blast wave on dose field of delayed neutron[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250222

Hu Jiaqi, Shang Peng, Zhu Jinhui, et al. Influences of blast wave on dose field of delayed neutron[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250222

Citation:

Hu Jiaqi, Shang Peng, Zhu Jinhui, et al. Influences of blast wave on dose field of delayed neutron[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250222

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Influences of blast wave on dose field of delayed neutron

doi: 10.11884/HPLPB202537.250222

State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi’an 710024, China

Received Date: 2025-07-18
Accepted Date: 2025-08-29
Rev Recd Date: 2025-08-30

Available Online: 2025-09-06

Abstract

Abstract

Background
Delayed neutron, as a key signature of nuclear fission, plays a significant role in nuclear technology and engineering. Major nuclear reactor accidents (e.g., Chernobyl, Fukushima) are often accompanied by explosions, which generated shockwave that may affects the transport of delayed neutron and consequently influence delayed neutron dose assessment. Understanding the influence of the shockwaves on the transport of delayed neutron is critical for accurate radiological evaluation in such scenarios.
Purpose
This study aims to investigate the influence of shockwave on the transport of delayed neutron released from fission products and to calculate the resulting dose field at ground-level monitoring points.
Methods
A correspondence between mass thicknesses and delayed neutron doses was established by using Monte Carlo method. The LAMBR model, based on a mirroring technique, was used to calculate the complex air density distribution arised by shockwave at around the delayed neutron source. By combing the mass-thickness equivalent attenuation law with the LAMBR model, the delayed neutron dose fields of typical fission nuclides were calculated.
Results
The results indicated that when the strength of the shockwave source is fixed, the enhancing effect of the shockwave on the transport of delayed neutron becomed more pronounced as the source height increased. Conversely, when the source is close to the ground and the strength of the shockwave source is sufficiently strong, ground-reflected shockwave may attenuate the transport of delayed neutron.
Conclusions
The transport of delayed neuron was significantly influenced by the shockwave, furthermore the influence is closely related to height and strength of the shockwave source. These findings provided valuable insights for improving dose assessment in accident conditions involving explosions.
- delayed neutron,
- Monte Carlo method,
- shock wave,
- mass thickness,
- dose

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References(20)

References

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