arXiv subjects

B. Vachev

Publications and source records attributed to B. Vachev.

5 recordsLinked to original sources

arXiv2014

Hydrodynamic model of Fukushima-Daiichi NPP Industrial site flooding

While the Fukushima-Daiichi was designed and constructed the maximal tsunami height estimate was about 3 m based on analysis of statistical data including Chile earthquake in 1960. The NPP project industrial site height was 10 m. The further deterministic estimates TPCO-JSCE confirmed the impossibility of the industrial site flooding by a tsunami and therefore confirmed ecological safety of the NPP. However, as a result of beyond design earthquake of 11 March 2011 the tsunami height at the shore near the Fukushima-Daiichi NPP reached 15 m. This led to flooding and severe emergencies having catastrophic environmental consequences. This paper proposes hydrodynamic model of tsunami emerging and traveling based on conservative assumptions. The possibility of a tsunami wave reaching 15 m height at the Fukushima-Daiichi NPP shore was confirmed for deduced hydrodynamic resistance coefficient of 1.8. According to the model developed a possibility of flooding is determined not only by the industrial site height, magnitude and distance to the earthquake epicenter, but also by duration of seismic impacts, power dissipation conditions, epicenter size and other conditions.

physics.flu-dyn↗

arXiv2013

Does the problem of global warming exist at all? Insight from the temperature drift induced by inevitable colored noise

In the present paper we state a problem of the colored noise nonremovability on the climatic 30-year time scale, which essentially changes the angle of view on the known problem of global warming.

physics.ao-ph↗

arXiv2012

Can Resonant Oscillations of the Earth Ionosphere Influence the Human Brain Biorhythm?

Within the frames of Alfv\'en sweep maser theory the description of morphological features of geomagnetic pulsations in the ionosphere with frequencies (0.1-10 Hz) in the vicinity of Schumann resonance (7.83 Hz) is obtained. It is shown that the related regular spectral shapes of geomagnetic pulsations in the ionosphere determined by "viscosity" and "elasticity" of magneto-plasma medium that control the nonlinear relaxation of energy and deviation of Alfv\'en wave energy around its equilibrium value. Due to the fact that the frequency bands of Alfv\'{e}n maser resonant structures practically coincide with the frequency band delta- and partially theta-rhythms of human brain, the problem of degree of possible impact of electromagnetic "pearl" type resonant structures (0.1-5 Hz) onto the brain bio-rhythms stability is discussed.

physics.gen-ph↗

arXiv2008

Carbon Dioxide Production Responsibility on the Basis of comparing in Situ and mean CO2 Atmosphere Concentration Data

The method is proposed for estimation of regional CO2 and other greenhouses and pollutants production responcibility. The comparison of CO2 local emissions reduction data with world CO2 atmosphere data will permit easy to judge for overall effect in curbing not only global warming but also chemical polution.

physics.ao-ph↗

arXiv2004

Gamma background and neutron flux measurements at Basic Ecological Observatory Moussala

The Basic Ecological Observatory (BEO) Moussala is located at 2925m above sea level and one of the main activities is connected with gamma background and neutron dose rate monitoring. The neutron and gamma measurements are carried out with help of site radiation monitor Harwell Type 3208-1. The dose rate of ambient gamma background is measured with SBN-90, improved with the embedded microprocessor system using automatic PC based system. A cross check and inter calibration with existing TLD (thermo luminescent dosimeters) at BEO Moussala which is a part of the monitoring network of INRNE is presented. A polyethylene sphere with a layer of lead serving as a neutron breeder, extending the energy range from about 40 MeV to several hundred MeV is presented as a project in development. Another project in development is the construction of active detector based on SNM-15 detectors for a dose rate measurement of cosmic neutrons is described. Preliminary study of the performances of the detectors are carried out. A further project for muonic telescope similar to the yet developed is discussed.

physics.ins-det↗