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Predictive Analysis of Toxic Gas Dispersion

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24EEK10499

Subject Category: Space Technology

PDF (to be added)

  • Responsible Representative: Hiroaki Sakai, Space Transportation Technology Directorate, Kagoshima Space Center, Ground Safety and Security Group
  • Contact Information: Keita Kanakubo(JAXA)(kaakubo.keita@jaxa.jp)
  • Members: Keita Kanakubo

Abstract

To improve the accuracy of analysis assuming an accident at the time of a launch of a key launch vehicle. During the launch of a key launch vehicle, propellant leakage due to satellite drop, etc., is considered to cause the diffusion of gases harmful to the human body. The scope of the impact is evaluated and appropriate personnel control/notification and communication plans are made. By improving the accuracy of the analysis, we will examine whether it is possible to reduce the extent of the impact and contribute to the reduction of the impact on the area around the launch site.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

The use of JAXA’s supercomputer satisfies the above needs and has the advantage that the trials can be repeated in JAXA’s in-house laboratory.

Achievements of the Year

Analysis of hazardous gas diffusion in the plains and its evaluation were conducted.

Tanegashima Island topography was read.

Publications

N/A

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: OpenMP
  • Number of Processes: 1 – 2
  • Elapsed Time per Case: 10 Minute(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.00

 

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name CPU Resources Used
(Core x Hours)
Fraction of Usage*2(%)
TOKI-SORA 0.00 0.00
TOKI-ST 619.36 0.00
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 177.68 0.01
TOKI-TST 1184.61 0.02
TOKI-TGP 0.00 0.00
TOKI-TLM 0.00 0.00

 

File System Resources
File System Name Storage Assigned
(GiB)
Fraction of Usage*2(%)
/home 0.00 0.00
/data and /data2 0.00 0.00
/ssd 0.00 0.00

 

Archiver Resources
Archiver Name Storage Used
(TiB)
Fraction of Usage*2(%)
J-SPACE 0.00 0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

 

ISV Software Licenses Used

ISV Software Licenses Resources
ISV Software Licenses Used
(Hours)
Fraction of Usage*2(%)
ISV Software Licenses
(Total)
23.02 0.02

*2: Fraction of Usage:Percentage of usage relative to each resource used in one year.

JAXA Supercomputer System Annual Report February 2024-January 2025