Kuliah Nuklir Online Tematik Minggu 4

1. Webdinar Nuklir 12 Desember 2020, Bandung, Indonesia 1
Komputasi Nuklir:
Pendekatan dan Perkembangannya
Sparisoma Viridi
Nuclear Physics and Biophysics Research Division,
Faculty of Mathematics and Natural Sciences,
Institut Teknologi Bandung,
Bandung 40132, Indonesia
v20201212_3

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Kerangka
• Pendahuluan
• TensorFlow
• GPU and Distributed Computing
• Penutup
Self introduction
..

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Pendahuluan

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8. Two cases
• One case of the computation in future nuclear
engineering is for a new field of innovative
nuclear engineering under development 
Innovative nuclear reactors case
• In another case, the development of the
computer enables calculation that was
impossible to date  Accident managements
case
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A majority of the codes
represent the cylindrical fuel
rod in a so-called one-and-
a-half dimension (1.5D). In
such simulation tools, all
transport processes are
solved in one (radial)
dimension, and the axial
segments are coupled via
balance equations. Hence,
the solution of the transport
processes is usually
programmed in separate
modules for each axial
slice, using couplers to
manage interactions
between models and slices.

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TensorFlow

15. Why TensorFlow
• TensorFlow is an end-to-end open source
platform for machine learning
• It has a comprehensive, flexible ecosystem of
tools, libraries and community resources that
lets researchers push the state-of-the-art in
ML and developers easily build and deploy ML
powered applications
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url https://www.tensorflow.org/ [20201212].

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18. A game with scenarios
• An overseas cyber-attack cases and attacking
scenario on the control facility of the nuclear
power plant
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GPU and Distributed
Computing

20. Istilah
• GPU computing is the use of a GPU (graphics
processing unit) as a co-processor to accele-rate
CPUs for general-purpose scientific and engineering
computing (boston.co.uk, 2020)
• Distributed computing also refers to the use of
distributed systems to solve computational pro-
blems, which is divided into many tasks, each of
which is solved by one or more computers, which
communicate with each other via message passing
(wikipedia, 2020)
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21. Pemanfaatan
• Astrofisika, Mencari pulsar dengan data sinyal
radio dan gelombang gravitasi, ..
• Mencari model terbaik untuk menjelaskan
alam semesta, ..
• Pelipatan protein, struktur protein ..
• Mengembangkan model prediksi cuaca, ..
• ..
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Wikipedia contributors, “”, Wikipedia, The Free Encyclopedia, 9 Dec 2020 08:45 UTS, url
https://en.wikipedia.org/w/index.php?oldid=993197397 [20201212].

22. Reconstructing Fusion Plasmas
• Ian Langmore reconstructs plasma tempera-
ture, density, and B-field from measurements
in partnership with TAE Technologies (a priva-
te fussion energy company)
• This is a Bayesian inverse problem (not DL)
• TensorFlow libraries:
distribution
tensorflow_probability
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TensorFlow, “Reconstructing Fusion Plasmas (TensorFlow Dev Summit 2018)”, YouTube, 30 Mar 2018, url
https://www.youtube.com/watch?v=Bb1_zlrjo1c [20201212].

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26. An inverse problem guided experiment
• Fussion reactor does experiment every 20 '
• The system pushes the data
• TensorFlow pulls the data to the code and do
the calculation
• Visualization is constructed and given back to
the reactor operators as guidance for the next
experiment
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TensorFlow, “At the intersection of TensorFlow & nuclear physics (TensorFlow Meets)”, YouTube, 28 Jun 2018, url
https://www.youtube.com/watch?v=T7G94kEoZTU&t=3m54s [20201212].

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Penutup

28. Ringkasan
• Perkembangan perhitungan komputasi yang
cepat dapat memandu eksperimen yang ber-
bahaya seperti dalam reaktor nuklir, meleng-
kapi pengukuran langsung (analog), semi-lang-
sung (analog2digital)
• Kolaborasi antar berbagai bidang diperlukan,
terutama sains yang mendasari pengukuran-
nya
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29. url https://de2.slideshare.net/sparisoma/komputasi-
nuklir-pendekatan-dan-perkembangannya [20201212]
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Terima kasih