Assessment of the fire resistance of a nuclear power plant subjected to a large commercial aircraft crash

Jeon, Se-Jin; Jin, Byeong-Moo; Kim, Young‐Jin

doi:10.1016/j.nucengdes.2012.02.003

Cited by 31 publications

(7 citation statements)

References 2 publications

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“…The studies of aircraft impact events with different impact velocities have been considered in previous research (Dritter and Gruner, 1976;Zorn and Schueller, 1986;Sugano et al, 1993;Abbas et al, 1996;Arros and Doumbalski, 2007;Petrangeli, 2010;Frano and Forasassi, 2011;Wilt et al, 2011;Iqbal et al, 2012;Jeon et al, 2012;Lu et al, 2015;Thai and Kim, 2015;Jeon and Jin, 2016). The impact velocities are 235, 247, 293 m/s in the September 11 event, while the most previously considered impact velocities were less than 220 m/s.…”

Section: Resultsmentioning

confidence: 99%

“…In the last several decades, the crashworthiness design and the safety assessment for the protecting shell of nuclear power plants (NPP) subjected to the malevolent aircraft impact have attracted great interests due to the increasing threats of the terrorist attacks and the rapidly https://doi.org/10. 1016/j.nucengdes.2018.11.034 Received 15 August 2018; Received in revised form 7 November 2018; Accepted 26 November 2018 growing numbers of NPP (Abbas et al, 1996;Itoh et al, 2005;Li et al, 2005;Arros and Doumbalski, 2007;Petrangeli, 2010;Frano and Forasassi, 2011;Iqbal et al, 2012;Jeon et al, 2012;Lee et al, 2013;Sadique et al, 2013;Kostov et al, 2014;Siefert and Henkel, 2014;Tennant et al, 2014;Andonov, et al, 2015;Lu et al, 2015;Thai and Kim, 2015;Jeon and Jin, 2016;Hu et al, 2017;Yu et al, 2017;Zhang et al, 2017;Hu et al, 2018;Wang et al, 2018). The histories of the impact force and the impact impulse have to be estimated from the expected impact velocities in order to assess the effects of aircraft impacts on the protecting shell of NPP.…”

Section: Introductionmentioning

confidence: 99%

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An engineering model and its numerical validation for a malevolent aircraft impinging against a rigid target: Force and impulse estimations

Wang

Yuan

et al. 2019

Nuclear Engineering and Design

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Generally, the time-dependent impact force of a commercial aircraft against a rigid wall can be calculated based on the Riera's model, which consists of the static crushing force and the dynamic force. The reduction coefficient α is generally considered to be less than a unity in the modified Riera's function, while the influence of the impact velocity on the reduction coefficient is not investigated before. Moreover, the static crushing force is hard to be determined in practice. Thus an engineering model was proposed in the present study, and the total force was only described by the dynamic force and another velocity-dependent coefficient γ. Based on a well-defined finite element model for the commercial aircraft Boeing B737-800, the entire impact process of the aircraft impinging on a rigid wall was reproduced by the commercial software LS-DYNA, and four different impact velocities (150, 200, 250, 300 m/s) were considered. Based on the simulation results, the influences of impact velocity on the two coefficients (α and γ) were investigated and discussed by matching the aircraft impact force/ impulse with the reaction force/impulse of the rigid wall. Finally, two formulas for the effects of impact velocity on the two coefficients were proposed, which is helpful for the engineers in designing and assessing the protecting shell of the nuclear power plant.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An engineering model and its numerical validation for a malevolent aircraft impinging against a rigid target: Force and impulse estimations

Wang

Yuan

et al. 2019

Nuclear Engineering and Design

View full text Add to dashboard Cite

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“…is condition is considered the most destructive case as reported by Sadique et al [11] and Zhang et al [13]. e initial velocity of the aircraft is assumed to be 150 m/s, which is used by Jeon et al [30] for structures with relatively low altitude. e time increments range from 3e-7 s to 7e-7 s. It has been demonstrated that further reduction in the time increment does not result in discrepancies in the calculated results.…”

Section: Integral Crash Analysis Of Boeing 767-200ermentioning

confidence: 99%

An Integral Numerical Analysis of Impact of a Commercial Aircraft on Nuclear Containment

Wang

Zhou

Shi

et al. 2019

Science and Technology of Nuclear Installations

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After the September 11 attack, the resistant capability of containments against aircraft impacts is required to be assessed for newly constructed nuclear power plants (NPPs). In this paper, the crash of a commercial airplane Boeing 767-200ER on the reinforced concrete containment building of an NPP is analyzed using the missile-target interaction method. Two plane models with the same total weight but different fuel distribution are analyzed. The force-time history obtained by FEA (finite element analysis) is compared with the one calculated by the Riera function. In the integral analysis, the mesh sensitivity of the reinforced concrete containment model is studied, and recommendations are provided on the modelling of containment. The impact phenomenon and damage on the containment are investigated through the validated model. The fuel distribution in the aircraft is found to have strong influence on the damage of the containment, which indicates that the load distribution in the transverse direction is critical in the analysis of aircraft impact. The classic load-time function analysis is unable to incorporate this factor and may not be adequate to provide satisfactory results. For this reason, the application of an integral analysis is advantageous in the safety assessment of aircraft impact.

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“…Abbas [7] and Kukreja [8] analysed the outer containment wall using load versus time history curve for Boeing 707-320 and many aircrafts. After that, Jeon et al [9] evaluated the response of a nuclear containment wall against fire resistance for a large commercial aircraft crash. The present study focuses on the studying the behavior of a nuclear containment of outer concrete layer 0.85 m thick with 6 mm thick steel liner and 60m high against the impact of an aircraft and its subsequent fire induced stresses.…”

Section: Revised Manuscript Received On September 15 2019mentioning

confidence: 99%

Nuclear Containment Wall under Aircraft Crash

Rawsan¹,

Maiti²

2019

IJRTE

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The safety analysis of important structure such as nuclear power plant against commercial aircraft has been studied. In the present study, a stepwise sequential analysis has been performed to determine the stresses on the nuclear containment wall under aircraft crash and induced fire effects. ABAQUS/Implicit finite element code was followed to get the response of the nuclear containment. First, the impact load is applied on the containment using Riera force history curve of Boeing 707-320, after 0.16 sec nodal temperatures were increased following the proposed jet fuel curve to imitate fire as a result of fuel burning. Combined effect of impact and heat has been used to study thermal stress variation. As the fuel is stored in the wings of the plane, the effect of fire is assumed to trigger as soon as the wings hit the outer face of containment wall. From Riera force history curve, time delay between plane’s first contact and wing contact with the containment wall was assumed to be 0.16 second. The effect due to fire was considered to be most severe at 10 m height from the base of containment structure. This is due to the fact that post-impact most of the fuel will immediately flow down to the bottom of containment. In the impact region, moderate fire for 15 minutes has been considered. The fire duration has been considered for 2 hrs at severe zone. The deformed geometry of model in impact analysis is then assumed to be the initial state for the thermal stress analysis. The concrete damaged plasticity model for concrete and JohnsonCook elastic-visco plastic material model for reinforcement have been taken to predict the behavior of concrete and steel. For heat transfer and thermal stress analysis, the material properties have been taken at elevated temperature form Eurocode 2. The containment has a circular cylindrical wall of inner diameter 42 m and thickness 0.85m excluding 6mm steel plate which was provided at the inner face of containment. The total height of the containment was assumed to be 60 m. The impact location of the aircraft was considered at the mid-height of the containment as more deformation was observed in this location

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Assessment of the fire resistance of a nuclear power plant subjected to a large commercial aircraft crash

Cited by 31 publications

References 2 publications

An engineering model and its numerical validation for a malevolent aircraft impinging against a rigid target: Force and impulse estimations

An engineering model and its numerical validation for a malevolent aircraft impinging against a rigid target: Force and impulse estimations

An Integral Numerical Analysis of Impact of a Commercial Aircraft on Nuclear Containment

Nuclear Containment Wall under Aircraft Crash

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