HV/TC/0015 - ARTC Extranet

ARTC Risk Assessment - Context Setting
CONTEXT SETTING
1. Background
When ARTC commenced the lease of NSW lines and commenced the management of Country
Regional Network(CRN) lines, the RIC standard of minimum rail closure of 2.2 metres and the
minimum distance between welds of 2.2metres was adopted across NSW. ARTC subsequently
increased this standard to 4 metres . Since take up of some of these CRN lines in the North
West as Residual Network under lease by ARTC in 2012, these low volume inland route tracks
have many welds within 4.0m and when new welds are performed it is not practical to conform
to 4m weld distance as per standard requirement on these lines. Therefore it is necessary to
allow welding within 4 metres of existing welds and no less than 2.2m from an existing weld
on these lines until all welds within 4m are replaced by progressive rerailing on these lines. All
closures should be of minimum of 4m.
2. Risk Statement
To asses the safety risk when adopting the weld distance of less than 4m but not less than
2.2m on Inland Network in NSW.
3. Risk Assessment Objectives
The objective of the risk assessment is to identify risk associated with allowing welds within
4.0m of existing weld but not less than 2.2m from the existing weld.
4. Critical Success Factors of the activity/proposal being assessed
Maximum utilisation of existing rail life with welds being within 4m without compromising rail
safety on low volume Inland Network in NSW.
5. Scope (inclusions and exclusions)
All newly installed welds on Inland Network in NSW.
6. Stakeholders
ARTC asset management and operations.
7. Stakeholder consultation
ARTC asset management staff on the Inland Network in NSW have contributed for the
discussion and Risk assessment.
8. Assumptions
The former NSW standard of 2.2m distance from existing weld is safe SFAIRP within low
volume Inland Network.
9. Constraints
Technically it is not always possible to perform welding at a distance more than 4m from an
existing weld on the cascaded 2nd hand metropolitan rail installed on the Inland Network
10. Boundaries/interfaces
All Inland Network tracks in NSW.
11. Qualifications/conditions
Former NSW standard of not less than 2.2 metres distance from existing weld can be adopted.
12. Reference documentation and standards
NCoP Civil Sec 1; ETM 01 01; ETM 01 04;
13. Other clarifying commentary
This Risk Assessment was attended by Ray Palmer, Graham watts,Wally walker, Richard Allan, Robert
Hamilton and Kandiah Nithiyananthan.
Copy of InlandWeld2 2M_ Risk Assessment
RISK ASSESSMENT TITLE and DATE
1.0
Risk
No.
1.01
Element or
Category
(column
may be
"hidden"
1. RISK IDENTIFICATION
1.1
1.2
Hazard or
Caused by
scenario or
circumstance
Allow welds adjacent to existing weld at a distance less than 4.0m but not closer than 2.2m on ARTC
Inland Network in NSW
1.3
Leading to an Outcome
2.0
Existing Control
Weld Geometry standard
ETM 01 01- except sec 4
Plain Track
Most Likely
(Credible)
Outcome
1
Rail
Defective rail
weld geometry
Close proximity
of welds (of not
less than 2.2
metres)
Rough ride
and potential
to increased
track
geometry
irregularities
Pg 1 of 1
Worst Case Routine Track patrols
(Credible)
Outcome Front of train inspections
2. ANALYSIS AND EVALUATION
2.1
Comments
5. VALIDATION AND CLARIFICATION
2.2
2.3
2.4
5.0
5.2
Current
Current Current Has this workshop
Comments /
consequen likelihood risk level adequately addressed this clarification
ce
risk?
Administrative Perform welds to the Geometric standard requirements in relation
to peak, dip, and gauge narrowing and other gemetric
requirements except within 4m.
Yes
Administrative
Minor
Unlikely
L
Administrative
AK car inspections
Administrative
Ultrasonic rail testing by
Speno car
Administrative
3.0
Proposed Additional
Control
Potential for
Broken Rails
and
derailment
2.01
Control type
3. PROPOSED ADDITIONAL RISK TREATMENT
3.01
SFAIRP TEST
Control type
3.1
BENEFIT
3.2
COST
3.3
Decision
3.4
Responsible
Party
3.5
By when
4. RESCORE TO REFLECT
4.0
4.1
4.2
Revised
Revised Revised
Consequen Likelihoo risk level
d
ce
Closures are to
be 4m in length
and be welded no
closer than 2.2m
from an existing
weld.
5.1
Do the decisions make
sense?
#REF!
Copy of InlandWeld2 2M_ Risk Assessment