chan-woo park presentation

8/13/2019 Chan-Woo Park Presentation

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1

Risk-based Evaluations and Trends of Railway Casualty

Accidents on the National Railway of South Korea

International Railway Safety Conference 2007

Goa, India

30th September - 6th October

Chanwoo Park, Jongbae Wang, Yunok Cho, Hyukjin Yoon, Joonam Park

http://www.krri.re.kr/



2

I Introduction

Contents

II Development of Risk ssessment Model

III Risk ssessment Results

IV Conclusion



Railway Casualty Accident

1. Introduction

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

Casualty accidents in both railway traffic accidents and safety accidents

All kinds of accidents that cause Injuries of people on railway premises

The railway casualty accident refers to …..



Railway Casualty Accident Situation on the Main Line

1. Introduction

300

400

500

600

700

800

900

1000

1100

1200

2000 2001 2002 2003 2004 2005

Year

F r e

q u e c y

Total Accident Frequency

Casualty Accident Frequency

150

170

190

210

230

250

2000 2001 2002 2003 2004 2005

Year

F W I

Total Accident Risk

Casualty Accident Risk

Accident Frequency per Year Fatalities and Weighted Injuries (FWI/Year)

“the number of casualty accidents occupies more than 50% of railway accidents

and 90% of the total risk of railway in South Korea.”

0.1 of a fatality for major injury

0.005 of a fatality for minor injury.



1. Introduction

Research Objectives

Quantitative Risk Evaluation of Casualty Accidents for

Passengers, Railway Staffs and MOP (Member of public)

Hazard Identification / Preliminary Hazard Analysis (PHA)

Frequency Analysis Consequence Analysis

Risk Analysis

Interaction analysis between hazardous events andhazardous condition

WWWSafety regulations,Published sources

Accident relatedreports

Accident Analysis



2. Development of Risk Assessment Model

Risk Analysis Process

Hazard

Identification

Causal Analysis

Consequence

Analysis

LossAnalysis

OptionsAnalysis

ImpactAnalysis

DemonstrationOf ALARP and

Compliance

- Railtrack, Yellow Book 3: Fundamentals and Guidance, 2000 -

2 D l t f Ri k A t M d l




Overall Procedures

Railway Accident

Appearance Scenarios

FTA Model

Railway Accident

Progress Scenarios

ETA Model

C a s u a

l

An al y s

i s

C on s e q u e

n c e

An al y si s

Hazard Identification

Defining the Initiating Hazardous Events

Development of Accident Scenarios

Risk Assessment (Loss Analysis)

Hazardous

Events

2 De elopment of Risk Assessment Model




Initiating Hazardous Events

Railway

Category

Initiating Hazardous Events

Railway Traffic

Casualty

Accident

People

struck/crushedStriking with train, Striking with objects

Trip/SlipTrip/slip during train boarding/alighting, Trip/slip by train emergency

braking/emergency start

Falling Falling from train, Falling from platform during train boarding/alighting

Caught/Dragged Caught in a train door, Caught between platform and train

Others Electric Shock, Burn, Suffocation

Railway safetyaccident

People

struck/crushedStriking with rolling stock, Striking with objects

Trip/SlipTrip/slip inside station premises, Trip/slip on track/level crossing,

Trip/slip inside rolling stock , Trip/slip at workplace

FallingFalling from rolling stock, Falling from rolling stock roof, Falling during

elevated work, Falling from railway structure, Falling from platform

Caught/DraggedCaught in installations inside rolling stock, Caught in railway structure of

station, Caught in work equipment/objects

Electric Shock Electric shock in rolling stock and railway structure

Burn Burn in rolling stock and railway structure

Suffocation Suffocation in rolling stock and railway structure

Others Patient occurrence, Assault/threat, Discovery for casualties

2 Development of Risk Assessment Model




Accident Appearance Scenario Structure

Hazardous

Event

Hazardous

Factor 1

Human

Factors

Technical

Factors

Third

Party

Hazard

Hazardous

Factor X

Human

Factors

Technical

Factors

Third

Party

Hazard

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.

Detailed Hazardous Factors Detailed Hazardous Factors





Accident Appearance Scenario Example





Accident Progress Scenario Structure

Critical factors influencing accident severity

were identified in the accident progress scenarios”

Example of the Accident Progress Scenarios




13


Accident Analysis Information System

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

Railway Accident Analysis Information System

Accident/Incident Analysis

Statistical Analysis ofAccident/Incident Data

Accident Scenario

Creation/Management



3. Risk Assessment Results



15

Total Risk for Railway Casualty Accidents

3. Risk Assessment Results



16

Average Frequency/yr for Hazardous Events



20

4. Conclusion

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

Development of risk assessment model for the 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%

Risk assessment for railway casualty accidents

“First step in the risk assessment of railway casualty accidents in Korea

Application to the definition of the risk reduction measures”

chan-woo park presentation

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