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Radiological consequence assessment for hypothetical nuclear explosion scenario using HotSpot

Kundu, Dipan ; Srinivas, C.V. ; Chandrasekaran, S. ; Venkatraman, B.

Progress in nuclear energy (New series), 2022-05, Vol.147, p.104192, Article 104192 [Periódico revisado por pares]

Oxford: Elsevier Ltd

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  • Título:
    Radiological consequence assessment for hypothetical nuclear explosion scenario using HotSpot
  • Autor: Kundu, Dipan ; Srinivas, C.V. ; Chandrasekaran, S. ; Venkatraman, B.
  • Assuntos: Atmospheric parameters ; Explosions ; Height ; Hot spots ; HotSpot ; Nuclear energy ; Nuclear explosion ; Nuclear explosions ; Nuclear reactors ; Parameter sensitivity ; Particle size ; Radiological impact ; Rain ; Sensitivity ; Simulation ; Terrain
  • É parte de: Progress in nuclear energy (New series), 2022-05, Vol.147, p.104192, Article 104192
  • Descrição: In this study the influence of atmospheric conditions, release height and particle size are studied on the radiological impact due to a hypothetical 15 KT nuclear explosion using the HotSpot model. Simulations show that among different parameters, the height of burst produces the highest impact on the total effective dose (TED). It is found that the maximum TED is about 4 orders higher for surface burst compared to elevated explosions. The range of impact of acute doses (TED >0.25 Sv) extends up to 10 km for neutral to stable conditions for ground releases and 5 km for unstable conditions for 600 m release. It has been found that city type terrain reduces the doses by 40% and 80% in unstable and stable conditions respectively compared to flat terrain. Simulations with different particle sizes indicate that the ground shine and TED are about twice higher for 100% RF particles compared to 50% RF particles after 0.5 km for all atmospheric conditions. The range of impact extends from 6 km for unstable to 10 km for stable conditions for both particle sizes. Larger particles lead to roughly 8 times higher ground deposited activity within 0.5 km for A to D conditions. For elevated release dose is highly sensitive to particle size parameter, almost 40 times higher compared to ground release and the range of impact extends to 10 km for 50% RF against 6 km for 100% RF. Simulations with inversion conditions suggest that an elevated inversion leads to enhanced TED especially for unstable condition (A, B, C classes) roughly by 2 factors at 1 km to 1 order at 10 km relative to no inversion and sensitivity of capping layer is lower for elevated releases. It has been found that presence of rain (10 mm.h−1) leads to higher groundshine dose by ∼1 order compared to no rain scenario. The sensitivity of washout is relatively high for elevated releases in the first 4 km range where the groundshine is at least 2 to 3 orders more compared to no rain condition and range of acute dose extends up to 8 km from 6 km in raining condition. •Influence of atmospheric conditions and source term characteristics on the radiological impact for a 15 KT hypothetical explosion studied using HotSpot.•Impact due to surface bursts is about 4 orders higher compared to elevated explosions.•Urban terrain reduces the impact by ∼40–80% under different atmospheric conditions compared to rural flat terrain.•Increase of radionuclide particle size increases ground contamination by ∼8 times in short range and impact extends to 10 km for 50% RF against 6 km for 100% RF.•Rainfall during explosion scenario increases ground contamination by 1-3 orders in the short range (3–5 km).
  • Editor: Oxford: Elsevier Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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