A critical reappraisal of nuclear power plant safety against accidental aircraft impact

Riera, Jorge Daniel

doi:10.1016/0029-5493(80)90233-2

Cited by 73 publications

(29 citation statements)

References 16 publications

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“…It is also used a model made with masses and stiffeners connected in serial way. This model was proposed by Riera (1980). The material used to model the structure was steel NBR 7008 ZAR-230, called Material 2 in the Table2.…”

Section: Numerical Analysis Of Bus Crash Testmentioning

confidence: 99%

“…In the case of the TRC model can be approximated speed assuming that between 5 ms and 35 ms, the displacement was 0.397 m a time of 30 ms, which produces a speed of 13.25 m/s. Riera (1980) Riera (1980) presents a simplified methodology that lets to determine the reaction force Fx(t) due to the unidimensional missile that impacts against a rigid blank. In this method the structure was discretized in lumped masses and non-linear springs series connected.…”

Section: The Numerical Simulation Of the Bus Crash Testmentioning

confidence: 99%

“…In the Figure 25 is represent a scheme typical of Riera model. (Riera, 1980) The strength of collapse C P is the force required to compress until the collapse of the structure studied, which can be determined experimentally or numerically. This collapse force can be determined for structures as the cave of an intercity bus body, the fuselage of an airplane or a simple profile.…”

Section: Crash Test Quantitative Assessment Using a Model Proposed Bymentioning

confidence: 99%

“…The Riera model (Riera 1980) was originally used to consider the computation of the impulse evolution produced by an aircraft impacting over a reinforced concrete nuclear reservoir wall, in this context the influence on the total force function F(t) of the yielding force PC(t) produced for target crushing is marginal (less than 20 % of the total impact force). But when using the same approach in the simulation of bus crash where the missile velocity range is low, the influence of the collapse force in the determination of the total impact force is very important, for this reason we propose a more elaborated way to consider Pc(t) in the case of the bus crash scenarios.…”

Section: Crash Test Quantitative Assessment Using a Model Proposed Bymentioning

confidence: 99%

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Numerical Analysis of an Intercity Bus Structure: A Simple Unifilar Model Proposal to Assess Frontal and Semifrontal Crash Scenarios

Meira

Iturrioz

Walber

et al. 2016

Lat. Am. j. solids struct.

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To improve the safety of the intercity bus structure against impact scenarios and to reduce the injuries and death in traffic accidents it is crucial in a country with continental dimensions like Brazil, where the road transport matrix is fundamental in the traffic of people and goods. In this context in the present article, a numerical model of an intercity bus was built with elastoplastic beam implemented in a commercial software Ls-Dyna. This model was submitted to different frontal and semi frontal impact crash scenarios. With this model were analyzed different accidents which happened in the Brazilian highways, it was also simulated a frontal impact test and the results obtained were compared with the experimental results. Finally two numerical approaches were compared, they are: a simple model made with lumped masses and non-linear springs series connected, and the elastoplastic beam model. The different comparisons carried out let us validate the intercity bus model created using elastoplastic beam elements and propose to use this model as an effective tool to search for more efficient bus structural configurations against impact scenarios. KeywordsFinite element method, intercity bus, frontal and semi frontal impact scenarios.

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Section: Numerical Analysis Of Bus Crash Testmentioning

confidence: 99%

Section: The Numerical Simulation Of the Bus Crash Testmentioning

confidence: 99%

Section: Crash Test Quantitative Assessment Using a Model Proposed Bymentioning

confidence: 99%

Section: Crash Test Quantitative Assessment Using a Model Proposed Bymentioning

confidence: 99%

See 2 more Smart Citations

Numerical Analysis of an Intercity Bus Structure: A Simple Unifilar Model Proposal to Assess Frontal and Semifrontal Crash Scenarios

Meira

Iturrioz

Walber

et al. 2016

Lat. Am. j. solids struct.

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show abstract

“…, 항공기(Boeing 707-320)의 하중함수를 이용하여 격납건물의 동적 응답을 해석하기 위한 연구 (Rebora et al, 1976), 항공기 충돌 벽체의 유연성 영 향(effect of target flexibility)과 충돌 각도(oblique) 영향 을 평가하기 위한 연구 (Riera 1980), 그리고 파손 변형률 (cracking strain)과 항공기/전투기의 충돌 위치에 따른 격 납건물 응답 해석을 위한 연구 (Abbas et al, 1996) Table 2 에 정리하였다. …”

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A Study on the Determination of Reference Parameter for Aircraft Impact Induced Risk Assessment of Nuclear Power Plant

Shup¹,

Hahm²,

Choi³

2014

jcoseik

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In this study, we developed a methodology to determine the reference parameter for an aircraft impact induced risk assessment of nuclear power plant (NPP) using finite element impact analysis of containment building. The target structure used to develop the method of reference parameter selection is one of the typical Korean PWR type containment buildings. We composed a three-dimensional finite element model of the containment building. The concrete damaged plasticity model was used for the concrete material model. The steels in the tendon, rebar, and liner were modeled using the piecewise-linear stress-strain curves. To evaluate the correlations between structural response and each candidate parameter, we developed Riera's aircraft impact force-time history function with respect to the variation of the loading parameters, i.e., impact velocity and mass of the remaining fuel. For each force-time history, the type of aircraft is assumed to be a Boeing 767 model. The variation ranges of the impact velocity and remaining fuel percentage are 50 to 200m/s, and 30 to 90%, respectively. Four parameters, i.e., kinetic energy, total impulse, maximum impulse, and maximum force are proposed for candidates of the reference parameter. The wellness of the correlation between the reference parameter and structural responses was formulated using the coefficient of determination (R 2 ). From the results, we found that the maximum force showed the highest R 2 value in most responses in the materials. The simplicity and intuitiveness of the maximum force parameter are also remarkable compared to the other candidate parameters. Therefore, it can be concluded that the maximum force is the most proper candidate for the reference parameter to assess the aircraft impact induced risk of NPPs.

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Modeling and Analysis of Nuclear Power Plant Structures Using ANATECH‐ANACAP Software System

Rashid¹,

James²,

Dunham³

2013

Infrastructure Systems for Nuclear Energy

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A critical reappraisal of nuclear power plant safety against accidental aircraft impact

Cited by 73 publications

References 16 publications

Numerical Analysis of an Intercity Bus Structure: A Simple Unifilar Model Proposal to Assess Frontal and Semifrontal Crash Scenarios

Numerical Analysis of an Intercity Bus Structure: A Simple Unifilar Model Proposal to Assess Frontal and Semifrontal Crash Scenarios

A Study on the Determination of Reference Parameter for Aircraft Impact Induced Risk Assessment of Nuclear Power Plant

Modeling and Analysis of Nuclear Power Plant Structures Using ANATECH‐ANACAP Software System

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