slide1
Download
Skip this Video
Download Presentation
Hydrogen risk assessment in São Paulo State – Brazil

Loading in 2 Seconds...

play fullscreen
1 / 18

Hydrogen risk assessment in São Paulo State – Brazil - PowerPoint PPT Presentation


  • 147 Views
  • Uploaded on

4 th International Conference on Hydrogen Safety ICHS 2011 12 - 14 September 2011 San Francisco, CA, USA. Hydrogen risk assessment in São Paulo State – Brazil Newton Pimenta Sandro Tomaz Giuseppe Michelino. 198_NevesN. São Paulo State (SP). Municipalities: 645 Population:

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Hydrogen risk assessment in São Paulo State – Brazil' - angus


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

4th International Conference on Hydrogen SafetyICHS 2011

12 - 14 September 2011

San Francisco, CA, USA

Hydrogen risk assessment in São Paulo State – Brazil

Newton PimentaSandro TomazGiuseppe Michelino

198_NevesN

slide2

São Paulo State (SP)

  • Municipalities: 645
  • Population:
    • 41 million inhabitants
    • 95% urban
  • Gross Domestic Product: 34% of the country
  • 21 million vehicles
  • 108,000 industries

FONTES: IBGE, DETRAN-SP

cetesb main objectives
CETESB Main Objectives
  • Evaluation of environmental quality Air - Water - Soil
  • Inspection of environmental pollution sources
  • Technology transfer in the environmental field
  • Prevention - environmental licensing
  • Main focus is outside the walls.
slide5

VILA SOCÓ - CUBATÃO CITY

04/Feb/1984

GASOLINE PIPELINE RUPTURE

FOLLOWED BY FIRE

Source: Banco de Imagens da CETESB/1984

slide6

500 victims

93 deaths

Source: Petrobrás

licensing prevention
Licensing - Prevention

Environmental

Licensing

Previous and

Installation License

Operational License

Risk Analysis

(RA)

slide8

Hazardous substanceand quantity (RD)

Off-site Vulnerability

QRA?

NO

YES

Off-site scenarios selection

ConsequenceAnalysis

FrequencyAnalysis

CETESB’s Risk Analysis Flowchart

Risk estimation (Societal & Individual)

Needriskreduction?

YES

Risk reduction measures

NO

Risk Management Program

risk management program rmp
Risk Management Program (RMP)
  • Process Safety Information
  • Management of Change
  • Operating Procedures
  • Training
  • Assuring the Quality and Mechanical Integrity of Critical Equipment
  • Emergency Response and Control
  • Investigation of Incidents
  • Audit of Risk Management Systems
comparison qra x rmp
Comparison: QRA x RMP

Quantitative Risk Analysis:

Expensive

Subject to greater uncertainties

Time-consuming

Risk Management Program

Not expensive

Simple

Less time used in analysis

Reference Distance supports the decision-making

reference distance rd
Reference Distance (RD)
  • Reference Distance (RD)
    • Maximum distance reached by 0.1 bar overpressure from vapour cloud explosion (1% death).
  • Instantaneous release of 20% of the inventory of a vessel/tank
    • Cloud dispersion to Lower Flammability Limit (LFL)
    • Vapour Cloud Explosion (VCE)
    • Software PHAST 6.54 determines the “worst case” consequences for an explosion.
  • Chart: RD x Mass
hydrogen rd chart and vce
Hydrogen RD Chart and VCE

Vapour Cloud Explosion

Hydrogen RD Chart

Distance to 0.1 bar

Cloudcenter

Leaksource

LFL

Reference Distance (m)

Simulation : weather conditions

rd application
RD Application

Population inside

RD circle?

NO

Risk Management Program (RMP)

YES

QRA

example of rd application
Example of RD Application
  • Four interconnected hydrogen vessels, each one with 250 kg (total 1,000 kg)
  • Chart indicates a RD of 81 m
  • Is there population inside the RD circle? From the figure the answer is YES
  • Conclusion: the facility must submit a full QRA to CETESB
discussion
Discussion
  • The assumptions may be conservative in some cases. For example: it does not consider any protective system
  • Initial screening
  • Covers storage cases
  • Not for continuous process
conclusion
Conclusion
  • Not the worst case, but conservative
  • Simple, easy to aplly and cheaper
  • Money / time saving
slide18

Thank you! Obrigado!

São Paulo Environmental Protection Agency

Brazilian Reference Center

for Hydrogen Energy

Hydrogen Laboratory

at Unicamp

Contacts:

Sandro Tomaz [email protected]

Giuseppe Michelino [email protected]

Newton Pimenta [email protected]

ad