PPT Master Format Template

1
International Railway Safety Conference 2007 Goa,
India
Risk-based Evaluations and Trends of Railway
Casualty Accidents on the National Railway of
South Korea
30th September - 6th October
Chanwoo Park, Jongbae Wang, Yunok Cho, Hyukjin
Yoon, Joonam Park
2
Contents
I
Introduction
II
Development of Risk Assessment Model
III
Risk Assessment Results
IV
Conclusion
3
1. Introduction
Railway Accident Classification in South Korea
The Railway Safety Act was established in 2004
The railway accident report regulation has been
set up in 2006
Railway Accident Classification by the Railway
Accident Report Regulation
Railway Traffic Accident Train Accident Train collision accident, Train derailment accident, Train fire accident, Other train accidents
Railway Traffic Accident Level Crossing Accident Collision or contact between a train and a road vehicle on the railway level crossing (excluding collision between a train and people)
Railway Traffic Accident Railway Traffic Casualty Accident Passenger casualty accident, Worker casualty accident, MOP casualty accident (including collision between a train and people in level crossings)
Train Operation Delay Accident Rolling stock derailment, Rolling stock damages, Rolling stock fire, Rolling stock separation, Rolling stock rolling, Regulation violation such as SPAD, Railway track failure, Electric supply system failure, Signal system failure, Rolling stock failure, etc Rolling stock derailment, Rolling stock damages, Rolling stock fire, Rolling stock separation, Rolling stock rolling, Regulation violation such as SPAD, Railway track failure, Electric supply system failure, Signal system failure, Rolling stock failure, etc
Railway Safety Accident Railway safety casualty accident, Fire accident, Infrastructure/equipment accident, Construction accident Railway safety casualty accident, Fire accident, Infrastructure/equipment accident, Construction accident
Disaster Disaster Disaster
4
1. Introduction
Railway Casualty Accident
The railway casualty accident refers to ..
Casualty accidents in both railway traffic
accidents and safety accidents All kinds of
accidents that cause Injuries of people on
railway premises

• Excluding train derailment, train collision,
  train fires/explosion
• Excluding collision between a train and a road
  vehicle on the railway level crossing
• Including suspected suicide
• Including collision between a train and people in
  level crossings

5
1. Introduction
Railway Casualty Accident Situation on the Main
Line
Accident Frequency per Year
Fatalities and Weighted Injuries (FWI/Year)
0.1 of a fatality for major injury 0.005 of a
fatality for minor injury.
the number of casualty accidents occupies more
than 50 of railway accidents and 90 of the
total risk of railway in South Korea.
6
1. Introduction
Research Objectives
Quantitative Risk Evaluation of Casualty
Accidents for Passengers, Railway Staffs and MOP
(Member of public)
Risk Analysis
Frequency Analysis
Consequence Analysis
Interaction analysis between hazardous events and
hazardous condition
Hazard Identification / Preliminary Hazard
Analysis (PHA)
Safety regulations, Published sources
Accident related reports
7
2. Development of Risk Assessment Model
Risk Analysis Process
- Railtrack, Yellow Book 3 Fundamentals and
Guidance, 2000 -
8
2. Development of Risk Assessment Model
Overall Procedures
Hazard Identification
Defining the Initiating Hazardous Events
Development of Accident Scenarios
Casual Analysis
Consequence Analysis
Railway Accident Progress Scenarios
Railway Accident Appearance Scenarios
Hazardous Events
FTA Model
ETA Model
Risk Assessment (Loss Analysis)
9
2. Development of Risk Assessment Model
Initiating Hazardous Events
Railway Category Initiating Hazardous Events Initiating Hazardous Events
Railway Traffic Casualty Accident People struck/crushed Striking with train, Striking with objects
Railway Traffic Casualty Accident Trip/Slip Trip/slip during train boarding/alighting, Trip/slip by train emergency braking/emergency start
Railway Traffic Casualty Accident Falling Falling from train, Falling from platform during train boarding/alighting
Railway Traffic Casualty Accident Caught/Dragged Caught in a train door, Caught between platform and train
Railway Traffic Casualty Accident Others Electric Shock, Burn, Suffocation
Railway safety accident People struck/crushed Striking with rolling stock, Striking with objects
Railway safety accident Trip/Slip Trip/slip inside station premises, Trip/slip on track/level crossing, Trip/slip inside rolling stock , Trip/slip at workplace
Railway safety accident Falling Falling from rolling stock, Falling from rolling stock roof, Falling during elevated work, Falling from railway structure, Falling from platform
Railway safety accident Caught/Dragged Caught in installations inside rolling stock, Caught in railway structure of station, Caught in work equipment/objects
Railway safety accident Electric Shock Electric shock in rolling stock and railway structure
Railway safety accident Burn Burn in rolling stock and railway structure
Railway safety accident Suffocation Suffocation in rolling stock and railway structure
Railway safety accident Others Patient occurrence, Assault/threat, Discovery for casualties
10
2. Development of Risk Assessment Model
Accident Appearance Scenario Structure
Hazardous Event
Hazardous Factor 1
Hazardous Factor X
Human Factors
Technical Factors
Third Party Hazard
Human Factors
Technical Factors
Third Party Hazard
Detailed Hazardous Factors
Detailed Hazardous Factors
The number of

• Hazardous events is 28.
• Appearance scenarios including hazardous factors
  is 282.
• Detailed hazardous factors is 47.
• Accident appearance scenarios is 13,254.

11
2. Development of Risk Assessment Model
Accident Appearance Scenario Example
12
2. Development of Risk Assessment Model
Accident Progress Scenario Structure
Critical factors influencing accident
severity were identified in the accident progress
scenarios
Example of the Accident Progress Scenarios
13
2. Development of Risk Assessment Model
Accident Analysis Information System
Railway Accident Analysis Information System
Accident Scenario Creation/Management
Statistical Analysis of Accident/Incident Data
Accident/Incident Analysis
1) railway operation data processing part 2)
accident/incident data processing part 3) hazard
list management part 4) hazardous event
management part 5) environment condition
management part 6) safety measure management
part 7) statistical analysis part of
accident/incident data 8) accident scenario
creation/management part
14
3. Risk Assessment Results
Railway Casualty Accident Data Analysis
Railway accident data for two years (2004 2005)
on the main line of South Korea were analyzed.
In the case of rare events not available from
accident data, each risk were assessed using
engineering judgments.
Average Frequency per year 447.0
Total risk per year 182.9
Injured People Fatalities and Weighted Injuries (FWI)/Year Fatalities and Weighted Injuries (FWI)/Year
Injured People Values Percentages
Passenger 53.0 29.0
Member of public (MOP) 115.3 63.1
Staff 14.5 7.9
Total 182.8 100.0
15
3. Risk Assessment Results
Total Risk for Railway Casualty Accidents
16
3. Risk Assessment Results
Average Frequency/yr for Hazardous Events
17
3. Risk Assessment Results
Risk for Hazardous Events
18
3. Risk Assessment Results
Risk for Train Striking Events
19
3. Risk Assessment Results
Risk Profile
20
4. Conclusion
Development of risk assessment model for the
railway casualty accidents

• Risk model based on the accident scenarios.
• Totally 28 initiating hazardous events
• Accident frequency assessment model using the FTA
  technique
• Consequence estimation model using the FTA
  technique

Risk assessment for railway casualty accidents

• Total overall risk per year 182.9
• Risk per year for passenger, MOP, and staff 53,
  115.3, 14.5
• Risk of people striking with train event 86.7
• Risk of trespassers on the open tracks between
  stations event 49.2

First step in the risk assessment of railway
casualty accidents in Korea Application to the
definition of the risk reduction measures
21
Thank you!