First International Conference on MOLDAVIAN RISKS – FROM ...
Share Embed Flag
Download ePaper

First International Conference on MOLDAVIAN RISKS – FROM ...

First International Conference on MOLDAVIAN RISKS – FROM ... First International Conference on MOLDAVIAN RISKS – FROM ...

mrconference.ub.ro
from mrconference.ub.ro More from this publisher
11.12.2012 Views

ong>Firstong> ong>Internationalong> ong>Conferenceong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE 16-19 May 2012, Bacau, Romania A NEW APPROACH OF ATMOSPHERIC VORTEX DYNAMICS BY NON-DIFFERENTIABILITY Adrian Timofte 1, 2 , Marius Mihai Cazacu 1 , Dan Gheorghe Dimitriu 1 , Silviu Octavian Gurlui 1 , Maricel Agop 3 1 “Alexandru Ioan Cuza” University of Iasi, Faculty of Physics, Romania 2 National Meteorological Administration, Regional Forecast Center Bacau, Romania 3 “Gheorghe Asachi” Technical University of Iasi, Romania Corresponding author: Maricel Agop, m.agop@yahoo.com Abstract: Assimilating the atmospheric fluid with a complex fluid and considering that the fluid particles dynamics takes place on continuous and non-differentiable curves we build a new theoretical model of atmospheric vortex. This theory enables us to perform a good approach of dynamics both on a predictable scale (that correspond in our model with a differentiable scale) and an unpredictable scale (that corresponding at undifferentiated scale). The global vision of dynamics is realized into an atmospheric fluid considering that until now was used only a deterministic models or stochastic models. Furthermore it is shown that the vortex source is given by a complex fluid dynamics on the nondifferentiable scale. Validation of the theoretical model was based on correlations with meteorologically data. An immediate perspective is to taking into account the tropospheric particles distribution with altitude, such as a LIDAR system (Light Detection and Ranging), with a high spatial and temporal resolution (3.5 meters/ from 30 seconds to 1 or 5 minutes). Thus, the variation of aerosols distribution in the atmosphere (up to altitudes of 10 - 12 km) and complex variation of the fluid particle distributions (according to theoretical model) will be highlighted and correlated for validation of theoretical model. Key words: vortex, complex fluid, non-differentiability, atmospheric dynamic. 50

ong>Firstong> ong>Internationalong> ong>Conferenceong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE 16-19 May 2012, Bacau, Romania STRESS TESTS FOR CERNAVODA NPP - ASSESSMENT OF PROTECTION AGAINST EARTHQUAKES Cantemir Ciurea-Ercau, Elena Dinca, Madalina Tronea Comisia Nationala pentru Controlul Activitatilor Nucleare (CNCAN), Bucharest, Romania Corresponding author: Cantemir Ciurea-Ercau, cantemir.ciurea@cncan.ro Abstract: On the 11 th of March 2011, the Fukushima Daiichi nuclear power plant in Japan experienced a seismic event and a subsequent tsunami exceeding the design basis of the plant. This led to a severe nuclear accident affecting multiple units of the Fukushima Daiichi plant and resulting in uncontrolled radioactive releases. Following the Fukushima Daiichi accident, the Romanian authorities and the nuclear industry have performed reassessments of nuclear safety and emergency preparedness arrangements and have started to implement improvements, in line with the international efforts in this direction. The safety reassessments conducted in response to the Fukushima accident included the "stress tests" review required by the European Council, in compliance with the specifications and criteria issued by the European Commission, based on the work done by the European Nuclear Safety Regulators' Group (ENSREG) and the Western European Nuclear Regulators' Association (WENRA). A significant effort has been made by the licensee for Cernavoda nuclear power plant to respond to the lessons learned from the Fukushima accident in a timely manner. Several potential design and operational improvements have been identified and their implementation is in progress to further enhance the existing safety margins and reduce the risk from severe accidents. The reviews and inspections performed by the National Commission for Nuclear Activities Control (CNCAN) confirmed the licensee is able to support all the claims made in their "stress test" report and that any issues and opportunities for improvement arising from the stress test will be adequately addressed. This conclusion is supported also by the results of the peer review performed by a team of experts coming from the European Commission and several nuclear safety authorities from all across Europe. The "stress tests" included an assessment of the nuclear power plants' capabilities to cope with extreme natural hazards, such as beyond design basis earthquakes and floods. This paper presents the results of the "stress tests" for Cernavoda nuclear power plant and the current status of the work performed by the National Commission for Nuclear Activities Control (CNCAN) to review safety in the light of the lessons learned from the Fukushima accident, with a focus on the protection against seismic events. Key words: nuclear power, nuclear safety, seismic hazard assessment, stress tests. 51

<str<strong>on</strong>g>First</str<strong>on</strong>g> <str<strong>on</strong>g>Internati<strong>on</strong>al</str<strong>on</strong>g> <str<strong>on</strong>g>C<strong>on</strong>ference</str<strong>on</strong>g> <strong>on</strong> <strong>MOLDAVIAN</strong> <strong>RISKS</strong> - <strong>FROM</strong> GLOBAL TO LOCAL SCALE<br />

16-19 May 2012, Bacau, Romania<br />

STRESS TESTS FOR CERNAVODA NPP - ASSESSMENT OF<br />

PROTECTION AGAINST EARTHQUAKES<br />

Cantemir Ciurea-Ercau, Elena Dinca, Madalina Tr<strong>on</strong>ea<br />

Comisia Nati<strong>on</strong>ala pentru C<strong>on</strong>trolul Activitatilor Nucleare (CNCAN), Bucharest, Romania<br />

Corresp<strong>on</strong>ding author: Cantemir Ciurea-Ercau, cantemir.ciurea@cncan.ro<br />

Abstract: On the 11 th of March 2011, the Fukushima Daiichi nuclear power plant in Japan<br />

experienced a seismic event and a subsequent tsunami exceeding the design basis of the<br />

plant. This led to a severe nuclear accident affecting multiple units of the Fukushima<br />

Daiichi plant and resulting in unc<strong>on</strong>trolled radioactive releases. Following the Fukushima<br />

Daiichi accident, the Romanian authorities and the nuclear industry have performed<br />

reassessments of nuclear safety and emergency preparedness arrangements and have<br />

started to implement improvements, in line with the internati<strong>on</strong>al efforts in this directi<strong>on</strong>.<br />

The safety reassessments c<strong>on</strong>ducted in resp<strong>on</strong>se to the Fukushima accident included the<br />

"stress tests" review required by the European Council, in compliance with the<br />

specificati<strong>on</strong>s and criteria issued by the European Commissi<strong>on</strong>, based <strong>on</strong> the work d<strong>on</strong>e by<br />

the European Nuclear Safety Regulators' Group (ENSREG) and the Western European<br />

Nuclear Regulators' Associati<strong>on</strong> (WENRA). A significant effort has been made by the<br />

licensee for Cernavoda nuclear power plant to resp<strong>on</strong>d to the less<strong>on</strong>s learned from the<br />

Fukushima accident in a timely manner. Several potential design and operati<strong>on</strong>al<br />

improvements have been identified and their implementati<strong>on</strong> is in progress to further<br />

enhance the existing safety margins and reduce the risk from severe accidents. The reviews<br />

and inspecti<strong>on</strong>s performed by the Nati<strong>on</strong>al Commissi<strong>on</strong> for Nuclear Activities C<strong>on</strong>trol<br />

(CNCAN) c<strong>on</strong>firmed the licensee is able to support all the claims made in their "stress<br />

test" report and that any issues and opportunities for improvement arising from the stress<br />

test will be adequately addressed. This c<strong>on</strong>clusi<strong>on</strong> is supported also by the results of the<br />

peer review performed by a team of experts coming from the European Commissi<strong>on</strong> and<br />

several nuclear safety authorities from all across Europe. The "stress tests" included an<br />

assessment of the nuclear power plants' capabilities to cope with extreme natural hazards,<br />

such as bey<strong>on</strong>d design basis earthquakes and floods. This paper presents the results of the<br />

"stress tests" for Cernavoda nuclear power plant and the current status of the work<br />

performed by the Nati<strong>on</strong>al Commissi<strong>on</strong> for Nuclear Activities C<strong>on</strong>trol (CNCAN) to review<br />

safety in the light of the less<strong>on</strong>s learned from the Fukushima accident, with a focus <strong>on</strong> the<br />

protecti<strong>on</strong> against seismic events.<br />

Key words: nuclear power, nuclear safety, seismic hazard assessment, stress tests.<br />

51

logo

products

Resources

Company

Terms of service
Privacy policy
Cookie policy
Cookie settings
Imprint
Change language
Made with love in Switzerland
© 2024 Yumpu.com all rights reserved

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!