Second SC5 pilot identifying the release location of a substance
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Transcript of Second SC5 pilot identifying the release location of a substance
SECOND SC5 PILOTIDENTIFYING THE RELEASE LOCATIONRELEASE LOCATION OF A SUBSTANCE
NCSR Demokritos11 October 2016
ContentContent
Environment contamination The Chernobyl plumey p The Algeciras plume Th F k hi l The Fukushima plume Problem definition Leveraging BDE Issues to be explored Issues to be explored
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Exposure pathwaysExposure pathways
Cloudshine
Inhalation
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Ingestion
Groundshine
FactorsFactors
Climate and weather are important factors affecting accident consequences
In the absence of rain dry deposition takes placeo radioactive particles settle under the influence of o radioactive particles settle under the influence of
gravity, wind and turbulence
Snow and rain result Snow and rain result in wet deposition
S Source: http://www.irsn.fr/EN/publications/thematic/fukushima/Documents/IRSN_Fukushima-Environment-consequences_28022012.pdf
The Chernobyl plumeThe Chernobyl plume
At 01:23 on 26/4/1986 a severe accident took place at Chernobyl-4 nuclear power plant
Atmospheric dispersion models were applied to the 137Cs atmospheric release po The meteorological conditions in Europe following the
accident were reconstructedacc de we e eco s uc ed
Source: http://www.irsn.fr/EN/publications/thematic-safety/chernobyl/Pages/The-Chernobyl-Plume.aspxwww.big-data-europe.eu
Source: http://www.europarl.europa.eu/news/en/news-room/20140514STO47018/forsmark-how-sweden-alerted-the-world-about-the-danger-of-chernobyl-disaster
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Source: http://www.europarl.europa.eu/news/en/news-room/20140514STO47018/forsmark-how-sweden-alerted-the-world-about-the-danger-of-chernobyl-disasterwww.big-data-europe.eu
The Algeciras plumeThe Algeciras plume
HYSPLIT simulation of 137Cs dispersion between 0 and 500m altitude every 3 hours over a 3-day period.
Source: http://www-dase.cea.fr/public/dossiers_thematiques/modelisation_et_simulation_du_transport_atmospherique/description_en.html
p y y pIt is presumed that the source (red dot) emits 100 Bq between 00:00 and 03:00 on May 30, 1998.
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The Fukushima plumeThe Fukushima plume
At 14:46 on 11/3/2011 the Tohoku-Chihou-Taiheiyo-Oki earthquake rocked Fukushima Daiichi nuclear power station
An hour later a tsunami invaded the site Hydrogen explosions
E l ti di th F k hi D ii hi Explanations regarding the Fukushima Daiichi accident consequences on the environment appear
h // i f /EN/ bli i / h iat: http://www.irsn.fr/EN/publications/thematic-safety/fukushima/Pages/2-fukushima-understanding-environment.aspx
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Issue at handIssue at hand
Release of a hazardous substance in the atmosphere
Support the decision making process for countermeasure takingg
Estimation of consequences on:h manso humans
o environment
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Problem statementProblem statement
Identify the release location of a substance Available information:
o Measurements of the substance level at certain locations
o Current weather conditionso Past weather conditionso Past weather conditions
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Current approachesCurrent approaches
Computational approach:o work backwards – inverse modelling – from the current
atmospheric conditions to estimate source location
Long computation times required, especially for g p q , p ycomplex caseso complicated topography o complicated topography o weather conditions
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Leveraging BDELeveraging BDE
Use BDE to manage:o A large number of pre-computed dispersion datao Historical atmospheric conditions
In this manner: In this manner:o The computationally hardest part is pre-computed
M t hi t t h i diti t th o Matching current atmospheric conditions to the pre-computed cases formulates a smaller problem
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The computational essenceThe computational essence
Match current weather against a database of historical atmospheric conditions by:o Building upon the NetCDF data management and
searching tools created during the first SC5 piloto Encoding weather patterns onto mapsWeather similarity map/image similarity
o Developing operators that search 7 consecutive hourly slices for similar weather
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Preliminary architecturePreliminary architecture
Transparent ingestion and exporting of
NetCDF dataNetCDF data
W3C PROV
Analytics on climate data
SC5 NetCDF toolsSC7 image/map change detection tools?
Apache HiveHadoop
MapReduceSpark
Apache HDFSwww.big-data-europe.eu
Open issuesOpen issues
Open issues to be investigated during the pilot implementation:o What exactly does “similar enough weather” mean for
this pilot purposes?o What volumes need to be pre-computed to always
have in the database “similar enough weather”?o Are these volumes manageable and searchable?
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