hsep0304 - hazard and operability study hazops procedure

8/12/2019 HSEP0304 - Hazard and Operability Study HazOpS Procedure

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HSEP0304Hazard study procedure(HazOps)

In this Procedure:

1.0Objectives.............................................................................................................2

2.0Scope....................................................................................................................2

3.0Risk management context....................................................................................2

3.1Individual risk level...................................................................................23.2Aggregation..............................................................................................33.3AAR! !rinciple......................................................................................3

3."Ot#er Risk Scales $%&A' !roject' (2()..................................................33.*Sa+et,.......................................................................................................3

".0Stud, leader - +acilitator training and accreditation..............................................3

".1&ig# value' #ig# risk projects...................................................................3".2Ot#er projects..........................................................................................3".3&aard stud, leader accreditation..........................................................."

*.0!rocedure /etail...................................................................................................*

.0/e+initions.............................................................................................................

.0inks......................................................................................................................

.0Responsibilit,........................................................................................................

.1evel 2 managers.....................................................................................2!roject manager........................................................................................3&aard stud, leader $appointed b, project manager).............................."!roduction manager $client)......................................................................*ommissioning manager $nominated b, project manager)....................

4.0Re+erences...........................................................................................................

10.0Revision #istor,..................................................................................................

Appendix A&aard stud, 1 5 identi+, #aards $&A6I/)............................................

Appendix 7&aard stud, 2 5 preliminar, design.....................................................11

Appendix &aard stud, 3 5 detail design &aOpS...............................................13Appendix /&aard stud, " 5 commissioning readiness inspection and c#ecklist..1

Appendix 8&aard stud, * 5 #andover readiness..................................................1

Appendix 9&aard stud, 5 +inalisation revie:......................................................20

Hydro Tasmania Procedure

;itleolnar /ateApproveda, 2011

/ate 8++ective< >a, 2011


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1.0 Obecti!esIdenti+,ing and managing risk +rom existing and potential #aards' and avoiding introduction o+ ne:#aards' is an integral part o+ t#e development' design and implementation o+ ne: e?uipment and

modi+ications to existing e?uipment.;#is procedure +ormalises six opportunities to identi+, and manage risk t#roug# a developmentli+ec,cle' and is intended to provide t#e +ollo:ing bene+its to t#e 7usiness.

Improved sa+et, and no introduced #aards.

Allo: elimination' substitution' modi+ication' isolation or introduction o+ engineering controls at

t#e design stage to reduce t#e e++ect o+ #aards.

8nsure e?uipment delivered +unctions as expected.

!rovide improved operabilit, and maintainabilit,.

8nsure re?uired reliabilit, is delivered and +ailure to sa+e conditions considered.

8nsure minimum li+e c,cle cost +or re?uired +eatures.

8nsure e?uipment speci+ications matc# re?uired risk pro+ile.

;#is procedure outlines t#e met#odolog, to be +ollo:ed to ac#ieve t#ese objectives. ;#emet#odolog, re+erences t#e II met#odolog, +or &aard Studies +or Sa+et, &ealt# and8nvironmental protection.

".0 Scope;#is procedure applies to

$a) All generation assets.$b) All modi+ications to assets or c#anges o+ operating modes o+ t#ose assets.

3.0 #is$ %ana&e%ent conte't;#is procedure is one component o+ t#e business@ Risk >anagement +unction and must t#ere+ore+it :it#in t#e Integrated 7usiness Risk >anagement $I7R>) procedure and standard.

;#e #aard stud, process provides a +ormal process +or identi+ication o+ risks' and an idealopportunit, to assess and propose mitigating actions. /eciding :#et#er mitigation actions arejusti+ied eg redesign' addition o+ redundanc,' determination o+ SI level etc s#all be done inaccordance :it# t#e I7R> procedure and I7R> standard.

Acceptance o+ risk as identi+ied in #aard studies' i.e. :#ere recommendation is no action@' s#allbe revie:ed b, t#e production manager' and' as necessar,' approvals soug#t in line :it# t#edelegation manual.

Re+er to t#e I7R> procedure and I7R> standard +or details.

It can be di++icult to prioritise risk mitigation activities at an individual asset and project level i+ allrisks are assessed on t#e I7R> scale. ;#e +ollo:ing are some guidelines +or #o: t#isdi++erentiation mig#t be ac#ieved at t#e &aOpS-project level.

3.1 Indi!idua ris$ e!eI+ a+ter assessing an individual risk it rates moderate or above on t#e I7R> scale' t#e risk must bemitigated b, elimination or reducing conse?uence or likeli#ood.

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3." &&re&ationI+ t#e #aard is common to t#e port+olio o+ generating plant' t#e risk target +or an individual mac#ineor s,stem s#ould be suc# t#at t#e aggregation o+ risk +rom all suc# mac#ines or s,stems isacceptable to t#e business.

9or exampleB +or a risk scenario common to all *2 mac#ines $eg protection +unction)' t#e reliabilit,target per mac#ine :ill need to be approx *0x t#e reliabilit, at :#ic# an individual mac#ine :ouldrate on t#e I7R> scale as >oderate.

A what if HazOpS study identifies that if a protection system fails to detect a fault, it haspotential to allow destruction of an alternator. The recommendation is to determine a SILratin !i.e. relia"ility taret# for the protection system. The potential conse$uence isestimated at %&'(. The I)*( Standard states the )usiness will accept an e+posure of noreater than '.' to this conse$uence.

-ith an estimated pro"a"ility of the fault of &/' yearsalternator !.'&0alternator#, and 'lare alternators in the system, the relia"ility of the protection must "e at least '.'!.'&01'#2 '.'/ i.e. & failure in &0. operations !SIL.

3.3 *#P PrincipeAAR! means as lo: as reasonabl, practicable@.

;#e AAR! principle is applied to t#e middle range o+ tolerable@ risks :#ere t#e expectation is t#atrisk mitigations :ill be applied to reduce t#e risk to lo:er levels unless t#e costs o+ doing t#is aredisproportionate to t#e bene+its gained.

In the pre3ious e+ample, the residual ris4 cost per alternator can "e calculated at'.'/1'.'&01%&'( 2 %&'4year. !567 8%/'4# If for %0'4 the protection can "e upradedto more than hal3e the ris4 cost, it should "e done. If it were more li4e %9'4, it shouldnt,and the "usiness will accept the residual ris4.

3.4 Other #is$ Scaes (+H, Proect, -"-)Ot#er risk scales ma, be used in pre+erence to I7R> i+ clearl, designated in t#e #aard stud,records. Screening and prioritisation o+ actions are t#en revie:ed on AAR! or +inancial principals.

Screening b, conse?uence onl, can also be a use+ul approac#.

3. Sa/etyRe+er to t#e I7R> Standard. Again risks o+ injur, or deat#s s#ould be considered +rom anaggregated business standpoint' t#ere+ore necessitate a lo:er tolerance +or individual mac#ines ors,stems to result in an acceptable aggregated business risk.

4.0 Study eader /aciitator trainin& and

accreditation

4.1 Hi&h !aue, hi&h ris$ proectsomplex' multidiscipline projects :it# a #ig# degree o+ innovation or uncertaint,' or o+ #ig# value o+$eg C*>)' s#all #ave an internal #aard stud, leader appointed to oversee t#e overall process.9acilitation o+ t#e Stage 2 and Stage 3 &aOpS s#all #o:ever be done b, an external provider :it#appropriate experience.

4." Other proectsAccredited #aard stud, leaders s#all +acilitate.

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4.3 Hazard study eader accreditation&aard stud, leaders s#all be undergoing t#e +ollo:ing training be+ore individuall, acting as #aardstud, leaderodule 1 o+ &; #aard stud, training package).

2. 9amiliarisation :it# #aard stud, tools' +acilitation tips' c#ecklists and documentation.$>odule 2 o+ &; #aard stud, training package).

3. Acted as #aard stud, leader +or a project under guidance o+ a previousl, accredited stud,leader.

;raining and maintaining o+ a su++icient pool o+ +acilitators is t#e responsibilit, o+ t#e projectmanager.

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.0 Procedure etai&aard identi+ication and management opportunities occur at six distinct p#ases o+ a project. ;#eprocess o+ managing #aards t#ere+ore spans t#e :#ole project and re?uires consideration at all o+

t#e six stages. /ependent on t#e nature and complexit, o+ t#e project t#ese ma, or ma, not be+ormal studies. ;#e extent and t,pe o+ stud, :ill need to be determined +or eac# project.

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2.0 e/initions

.0 *in$s

Attac#ment 1 &aard Identi+ication #ecklists AssetsD1*1133

Attac#ment 2 &aOpS Euide:ords AssetsD1*113"

Attac#ment 3 (#at I+ Stud, $ontrols &aOpS) !rompt ibrar, AssetsD1*113*

Attac#ment " auses o+ 9ailure AssetsD1*113

Attac#ment * &aard Stud, Record S#eet AssetsD1*43"2

Attac#ment &aard Stud, Read, +or ommissioning #ecklist AssetsD102"3

Attac#ment &aard Stud, &andover Readiness #ecklist AssetsD102"

Attac#ment &aard Stud, 9inalisation Revie: #ecklist AssetsD102"

.0 #esponsibiity

.1 *e!e " %ana&ers>anager Strategic Asset >anagement #as overall responsibilit, +or t#e procedure as a componento+ t#e governance and risk management +unctions.

>anager project deliver, #as t#e responsibilit, +or implementation o+ t#e procedure in t#e tec#nicaland operations project deliver, space.

." Proect %ana&er;#e project manager is responsible +or implementing t#is procedure :it#in t#e project' i.e. ensuring+acilitators and re?uired team members are appointed' #aards studies conducted as re?uired b,t#is procedure' and actions arising tracked and implemented.

.3 Hazard study eader (appointed by proect %ana&er);#e #aard stud, leader $+acilitator) is responsible +or ensuring t#e studies re?uired b, t#isprocedure are implemented to t#e standards and t#oroug#ness re?uired b, t#is procedure. ;#e#aard stud, leader designs t#e #aard Stud, process in conjunction :it# t#e production manager'project manager and tec#nical expert $eg principal asset engineer)' including selection o+ #aardstud, st,le and guide:ords appropriate +or t#e t,pe o+ :ork being studied.

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.4 Production %ana&er (cient)As t#e client +or t#e project and t#e #aard studies' t#e production manager #as +inal acceptanceo+ t#e process selection $stud, t,pes and stages)' rel,ing on endorsement o+ principal engineers'port+olio risk managers' and t#e #aard stud, leaders.

;#e production manager s#all also be t#e client +or reports and action lists generated +rom eac#stage.

. 5o%%issionin& %ana&er (no%inated by proect%ana&er)

;#e commissioning manager #as a speci+ic role as de+ined :it#in t#is procedure in &aard Studies"'*F.

6.0 #e/erences II &aard Studies +or t#e Sa+et, &ealt# and 8nvironmental !rotection.

AS I8 12 &aard and operabilit, Studies $&A6O! Studies) 5 Application Euide

AS I8 1*0 9unctional Sa+et, o+ 8lectrical-electronic-programmable 8lectronic Sa+et,

Related S,stems

10.0 #e!ision history#e!ision

nu%ber

ateappro!ed

etaied re!isiondescription

ocu%ento7ner #e!ie7er ppro!er

0 >a, 2010 !aul >olnar SI! ;eam $>S,lvester' /=an8mmerik'Erant7ender'9rank 6ucci'Step#en!almer' 7o,deedman).8xternalrevie: >ike(als# $EAS)

!aul >olnar>anager SA>'Andre: &ickman>anager !/.

1 /ec 2010 ;raining re?uirementsclari+ied' /evelopmentommittee Role removedto re+lect move to7usiness as Gsual@' minorclari+ications and c#angesto roles.

!aul >olnar'Andre:&ickman

!aul >olnar

1.1 >a, 2011 #ange o+ +ormat. Hocontent c#ange.

Supersedes document I/D"4*

Eart#7arnbaum

>ick uppari >ick uppari

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ppendi' Hazard study 1 8 identi/y hazards (H9I)

-ho Risk manager- project manager $i+

appointed)

-hen (#en t#e need +or t#e project

and-or modi+ication is identi+ied'and prior to t#e design or projectbrie+ being +inalised and conve,edto t#e concept team

-hy ;o ensure t#e project is justi+ied and

#as t#e rig#t priorit,.

;o ensure t#e risk drivers@ +or t#e

project are understood andcommunicated in t#e project brie+$:#, are :e doing it).

;o initiate a register o+ #aards andoperabilit, re?uirements +or inclusionin t#e project brie+ $:#at #aards are:e tr,ing to eliminate b, doing t#eproject or strike along t#e :a,).

;o set t#e standards appropriate +or

t#e project $:#at does success looklike).

;o select t#e appropriate &aard

Stud, process.

Ho7 Small team revie: $eg kick o++

meeting)

o Strateg, and assetmanagement $principal ornominee and riskmanager)

o !roject manager i+appointed

o !roduction $!>' operatorand engineering)

o >ajor outage team orontractor rep i+appropriate$Implementation met#ods).

#ecklist

State objectives

ist #aards and operabilit,

re?uirements

/e+ine standards and metrics

Incorporate in project and-or design

brie+

.1 Purpose

;o ensure t#e understanding o+ t#e project' t#e process' t#e operating environment and t#e#aards involved are su++icientl, understood to allo: sa+et,' #ealt# and environmental issues to beassessed. It allo:s ke, #aards to be documented +or elimination' management or control at t#eearliest stage in t#e project c,cle. It also contributes to ke, polic, decisions and ensures contactsare establis#ed bet:een t#e +unctional groups involved.

Je, aspects s#all include

hsep0304 - hazard and operability study hazops procedure

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