scholarly journals Mesoscale Analysis on the Asymmetric Rainband of Typhoon Matmo (2014) and the Related Weather Situations for the GE222 Aircraft Crash Case

2020 ◽  
Vol 8 (2) ◽  
pp. 33-44
Author(s):  
Tai-Hwa Hor ◽  
Chih-Hsien Wei ◽  
Yi-Sheng Chen ◽  
Tian-Yow Shyu
Keyword(s):  
Mesoscale Analysis ◽  
Aircraft Crash

Inclusion of Aircraft Crash into NPP Design Bases and Probabilistic Justification of Loads on Civil Structures and Equipment

2020 ◽  
pp. 35-47
Author(s):  
Nikita Chernukha
Keyword(s):  
Nuclear Power ◽  
Response Spectra ◽  
Mechanical Action ◽  
Exceedance Probability ◽  
Civil Structures ◽  
Method Of Calculation ◽  
Floor Response Spectra ◽  
Aircraft Trajectory ◽  
Probabilistic Justification ◽  
Aircraft Crash

The article is about nuclear power plant (NPP) safety analysis in case of aircraft crash. Specifically, the article considers the following problems: inclusion of aircraft crash into NPP design bases regarding calculation of frequency of an aircraft crash into NPP; aspects of justification of loads on NPP structures, systems and components (SSCs) caused by mechanical action of a primary missile – aircraft fuselage impact. Probabilistic characteristics of such random parameters as frequency of aircraft crash and direction of aircraft trajectory are determined by the results of analysis of world statistics of aviation accidents. Method of calculation of aircraft crash frequency on structures, buildings and NPP as a whole is presented. It takes into account options of accidental and intentional aircraft crashes and various aircraft approach scenarios. Procedure of probabilistic justification of loads on civil structures under aircraft impact is described. The loads are specified so as not to exceed allowable value of failure probability of NPP as a whole. Calculation of failure frequency of civil structures of existing NPP is given as an example to show analysis in case of a crash of an aircraft heavier than considered in NPP design. Procedure of probabilistic justification of dynamic loads on NPP equipment in case of aircraft impact is described. Method of floor response spectra (FRS) calculation with the required non-exceedance probability is given. Probabilistically justified loads in case of intentional aircraft impact (act of terrorism) are also considered. Additionally it is presented how internal forces calculated with the use of FRS with the required non-exceedance probability can be summed to provide analysis of subsystems.

Computer simulation of light aircraft crash

1977 ◽  
Vol 14 (10) ◽  
pp. 1009-1014 ◽  
Author(s):  
R. J. Melosh ◽  
M. P. Kamat
Keyword(s):  
Computer Simulation ◽  
Aircraft Crash

scholarly journals Mesoscale Analysis of Heavy Rainfall Episodes from SoWMEX/TiMREX

2012 ◽  
Vol 69 (2) ◽  
pp. 521-537 ◽  
Author(s):  
Christopher A. Davis ◽  
Wen-Chau Lee
Keyword(s):  
Heavy Rainfall ◽  
Southwest Monsoon ◽  
Rainfall Events ◽  
Mesoscale Analysis ◽  
Mesoscale Structure ◽  
Profound Influence ◽  
Moist Condition ◽  
Virtual Temperature ◽  
Convection Initiation ◽  
Heavy Rainfall Events

Abstract The authors analyze the mesoscale structure accompanying two multiday periods of heavy rainfall during the Southwest Monsoon Experiment and the Terrain-Induced Mesoscale Rainfall Experiment conducted over and near Taiwan during May and June 2008. Each period is about 5–6 days long with episodic heavy rainfall events within. These events are shown to correspond primarily to periods when well-defined frontal boundaries are established near the coast. The boundaries are typically 1 km deep or less and feature contrasts of virtual temperature of only 2°–3°C. Yet, owing to the extremely moist condition of the upstream conditionally unstable air, these boundaries appear to exert a profound influence on convection initiation or intensification near the coast. Furthermore, the boundaries, once established, are long lived, possibly reinforced through cool downdrafts and prolonged by the absence of diurnal heating over land in generally cloudy conditions. These boundaries are linked phenomenologically with coastal fronts that occur at higher latitudes.

scholarly journals Crashworthiness of Safe Fuels

1972 ◽  
Author(s):  
R. A. Rockow ◽  
L. M. Shaw
Keyword(s):  
Performance Evaluation ◽  
Fire Hazard ◽  
Full Scale ◽  
Safety Performance ◽  
Screening Tests ◽  
Aircraft Accidents ◽  
The Past ◽  
Relative Safety ◽  
Series Of Experiments ◽  
Aircraft Crash

Safety fuels such as emulsified and gelled fuels have been studied over the past several years as one means for reducing the post-crash fire hazard associated with aircraft accidents. However, through the work described herein, only recently has a quantitative evaluation been made to characterize the safety performance of these fuels. The safety performance evaluation program described in this paper includes an initial series of screening tests designed to obtain the characteristics of safe fuels in the aircraft crash environment. The authenticity of the screening tests relative to the full-scale crash environment was evaluated through a second series of experiments designed to simulate a full-scale aircraft crash environment. A crashworthiness evaluation criterion was established in terms of an “ignition susceptibility parameter” to quantitize the relative safety performance of different fuels. The conclusions of this research clearly show that significant savings in lives and equipment can be realized if safe fuels which perform within the non-hazardous envelope of the ignition susceptibility parameter are operationally incorporated in present-day aircraft.

Numerical analysis of nuclear power plant structure subjected to aircraft crash

2017 ◽  
Vol 9 (4) ◽  
pp. 341-352 ◽  
Author(s):  
Reza Saberi ◽  
Majid Alinejad ◽  
Mir Omid Mahdavi ◽  
Kamran Sepanloo
Keyword(s):  
Numerical Analysis ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Plant Structure ◽  
Aircraft Crash

Carbon monoxide determinations in postmortem tissues as an aid in determining physiologic status prior to death

1959 ◽  
Vol 14 (3) ◽  
pp. 313-320 ◽  
Author(s):  
Syrrel S. Wilks ◽  
Robert T. Clark
Keyword(s):  
Experimental Data ◽  
Carbon Monoxide ◽  
Human Beings ◽  
Controlled Experiments ◽  
Experimental Conditions ◽  
Aircraft Accidents ◽  
Solid Tissue ◽  
Solid Tissues ◽  
Tissue Specimens ◽  
Aircraft Crash

With appropriate methodology, carbon monoxide in the ‘solid’ tissues of animals was quantitated and correlated with the blood carbon monoxide level in a series of controlled experiments with rats and dogs. Experimental conditions simulating aircraft crashes were devised and again the blood and ‘solid’ tissue CO levels were determined. Using the experimental data on animals as a basis for extrapolating blood CO levels, along with tissue CO values, obtained from ‘control’ and CO-asphyxial cases in human beings, an analysis was made of the ‘solid’ tissue specimens obtained in 186 fatal aircraft accidents. From the analysis of tissue specimens from approximately 200 aircraft crash cases, some 30% gave by this method a blood CO level in excess of 30% saturation. These results point to the likelihood that CO was present in the personnel compartments of some or all of these aircraft at some time during flight. Submitted on September 22, 1958

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