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PLANT-2 STEAM NETWORK PHA

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imrane haifr

on 8 December 2013

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Transcript of PLANT-2 STEAM NETWORK PHA

PLANT-2 STEAM NETWORK PHA
PHA recommendations File
Master P&ID reference files.
PHA Level -2 Document.
PHA final Report.



FOLLOWING ARE ATTACHED LIST OF DOCUMENTS

1. Quantities of pressurized fuel gases
2. Flammables
3. Combustibles over their flash point
4. Explosives
5. Combustible dust
6. Highly acute and moderately acute toxicity materials
7. Strong acids and caustics
8. Steam at more than 20.5 kg/cm2 pressure.

EXAMPLES OF HIGHER HAZARD PROCESSES (HHP)

PHAs are examinations of each new or existing facility to assure that hazards of "catastrophic and major" safety or environmental consequences are identified and adequately controlled to an acceptable risk level.

PURPOSE OF PHA

RECOMMENDATIONS CLASSIFICATIONS

RECOMMENDATIONS

Following are the steam and condensate networks
which fall under HHP Process at URUT-3

This PHA covers the cyclic scope of Plant-2 steam network which fall under the HHP category. Previous PHA conducted in 2008. Re validation of past PHA has been conducted and recommendations generated with respect to any modification implemented.
Following are the networks on which PHA is conducted.

KS, HS, LHS, MS, LMS, LS Steam Networks (AMM-3 , URUT-3)
HC, LHC, LMC, MC, LC Condensate Networks. (AMM-3 , URUT-3)

A Higher Hazard Process is any activity Manufacturing, Handling, Storing, or using Hazardous substances (classified by OSHA / EPA) that, when released or ignited, can result in death or irreversible human health affects, significant property or environmental damage, or off-site impacts due to acute toxicity, flammability, Explosivity, corrosively, thermal instability, latent heat, or compression. Also operations involving chemicals where runaway conditions would result in container (vessel, tank etc) failure are included in HHP. Higher Hazard Process PHA is mandatory as per OSHA / EPA guideline. PHA must be conducted on existing facilities as outlined in the OSHA and EPA regulations.

HIGHER HAZARD PROCESS (HHP)

PFD OF STEAM NETWORK AT PLANT-2

PLANT-2 STEAM NETWORK PHA

Following are the steam and condensate networks which fall under HHP Process at AMM-3

INTRODUCTION TO STEAM NETWORK

SCOPE OF PHA

Following team was formulated to conduct subject PHA.

TEAM FORMATION

Total Man-hours = 136 hrs.

Following are details of PHA session.
Full day session conducted as per following schedule

July 3rd to July 6th

PHA SESSION

02 months
04 months
Next Turnaround / FAO
02 Year






Maximum Time

Procedural
Simple Job
Turnaround Job
Engineering Job

Category of Job

RECOMMENDATIONS TIMELINE CRITERIA

In addition to HAZOP What if/Checklist technique was also used for brainstorming and viewing every aspect of process variables.

What If/ Checklist

Nodes were prepared for each network and
each circuit was analyzed against its
possible deviating parameters

HAZOP

TECHNIQUES USED FOR PHA

Logging on MIS along with target dates

TOTAL RECOMMENDATIONS GENERATED 311

Consequence analysis, Risk Assessment and Scoring Done. Total 62 Recommendations finalized after merging and segregating simple jobs.

Recommendations sent to interfaces for consent

RECOMMENDATIONS PATH

LIST OF HAZARDS IN STEAM NETWORK

Human Error

Steam Hammering

High noise

Inadvertent Mixing
(Contamination)

Condensate
Splashing

High pressure

High Temperature
Full transcript