Computer Aided HAZOP

8/10/2019 Computer Aided HAZOP

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Computer-aided Hazard

IdentifcationPaul Chung

([email protected])Department o Computer !cience


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Hazard" and #perabilit$

(H%P) !tudie"' "tabli"hed and widel$ u"ed

techni ue in the proce"" indu"tr$or hazard identifcation

' *ime con"uming+ labour inten"i,eproce""

*ediou"/pen"i,e


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Computer-aided H%P

' Di0erent le,el" o "upportlectronic report ormlectronic data (on plant+ on 1uid"+

etc.)%utomated Hazard Identifcation

' Continuou" operation' 2atch operation


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%utomated Hazard

Identifcation' Continuou" operation

3rom ba"ic re"earch to commercial product

H%&ID2a"ic technolog$

' !igned directed graph (!D4) repre"entation' 3ault propagation

4o through a li"t o de,iation" "$"tematicall$and identi $ the ault" that cau"e thede,iation" and the con"e uence" that re"ult

rom the ault" and de,iation"


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H%&ID #,er,iew

' %utomated e/traction o plant de"ignrom a C%D "$"tem+ e.g. Intergraph

!martPlant P5ID' Con,enient orm" or adding an$

mi""ing proce"" "pecifc in ormation' *ick bo/e" or "electing anal$"i" option"

De,iation"+ e.g. more 1ow+ le"" 1ow+ etc.Item" to H%P+ etc.


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H%&ID #,er,iew' H%P "t$le output in di0erent output ormat"

678+ with H*78 web page ,iew./cel "pread"heet.

' 9uer$ acilit$ or ,iewing anal$"i" re"ult"e.g. ,iewing ault" and con"e uence" relating to aparticular plant iteme.g. ,iewing the propagation path between aparticular ault and con"e uence

' Compare acilit$ or ,iewing the di0erencebetween two H%&ID run":"e ul or a ter making a change to the de"ign


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Select SP P+IDFrom SmartPlant

Run Hazid data wizard,Extract plant data fromSP database:

Plant ItemsPipin!, "al"es, fittin!s#ontrolsFluids information:

$emperaturePressureFluid name

Hazid maps SP iconsto Hazop %Process&models

#on"erts P+I dia!ramto 'nal(sis model

Hazid anal(ses plant and!enerates Hazop Report

Hazid Operation

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Hazid Operation

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Hazid Operation

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Mapping SmartPlant to Hazid models

SmartPlant DatabaseReferences

Hazid Model TypesMapping created by user

for all company,then mapping is > !"

automatic

#utomatic mapping by Hazid$%%

&entrifugal Pump

'al(e

% )))))Mi*er Stripper

#bsorber Reactor

+ser ma es choice

-

..This +ser mapping is re/uired only once for the 0hole Pro1ect..


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Checking Automatic Nozzle Mapping

Hazid model is process function$ 2ut P34D is piping$

+ser confirms nozzle functions$56 is (apour li/uid in port,58 and 59 are li/uid out ports,5: is a (apour out port 5! is &leanout li/uid in port;

Liquid

Vapour Vapour/Liquidn Port

Liquid OutPort

Vapour OutPort

N1

N2

N3

N4

N5


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Hazid Operation

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Interaction between Faults, De"iations and #onse)uences

Consequence

DeviationFault

Fault * can cause ConsequenceFault * can cause Deviation to process "ariableDeviation can cause anot er DeviationDeviation can cause Consequence

!quipment "no#ledge $ase

"no#ledge a%out %eha&iour o' equipment

$ ese lin-s are called%arcs& in Hazid


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!quipment "no#ledge $ase"no#ledge a%out (aults and Consequences

)his is mainl* engineering kno#ledge and e+perience

4n


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Hazid Operation

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H%P !t$le #utput rom

H%&ID


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H%&ID ;iewer 9uerie"

' !tandard ormat ue"tion"


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3iltered #utput "howing3ault Path" or a gi,en

Hazard


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%utomated 2atch Plant

Hazard Identifcation' 2atch operation

arl$ re"earch protot$pe (CH C>#P)

2a"ic technolog$' %ction repre"entation' !tate-ba"ed "imulation

4o through a "et o operation in"truction""$"tematicall$ and identi $ potentialambiguitie"+ operating problem" and hazard"%ppl$ing guideword" "uch a" be ore+ a ter+no action+ etc.


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CH C>#P !$"tem

#,er,iew


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!imple 2atch ?eactor

/ample


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CH C>#P Plant

De"criptionin"tance(tank A i"a tank+ Bcontent in o

Breactant% + outport" in o Bout i" Bpump A +in ).in"tance(pump A i"a pump+ B"tatu" i" o ine+

outport" in o Bout i" B,al,e A +in ).in"tance(,al,e A i"a ,al,e+ B"tatu" i" clo"ed+

outport" in o Bout i" Breactor A + inE ).in"tance(reactor A i"a "tirredFtankFreactor+ B

outport" in o Bout i" B,al,e AG+in + outE i"B,al,e A +in +

heat!ink in o Bhout i" B acket A +hin + reaction in o BreactionFabFp

).


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#perating in"truction

ormat' Object Action

,al,e A open

' Object Action until Conditionmi/er on until elap"ed-time EA minute

' Object1 Action Object2 Filler-word

Fluid until Conditionreactor A fll- rom tank A with reactant% until ,olume GA percent


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CH C>#P #perating

Procedure Inputcharge reactor A with reactant% K ( ) ,al,e A open (E) pump A "tart (G) reactor A fllF rom tank A with

reactant% until ,olume GA percent

(L) pump A "top (M) ,al,e A clo"eNetc


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De,iation 4eneration

' Combine each "ingle action in theprocedure with guide word"+ rom

Jo action !imple omi""ion.arl$O8ate action !e uence o procedure

changed (how man$ "tep" ea"ible=).arl$O8ate action termination untilQ condition

o action ,aried.

' *hen+ "imulate the e0ect o e/ecuting thenew procedure on the plant+ detecthazard".


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2atch H%P #utput#peration >e$word Con"e uence"(G)reactor Afll romtank Awithreactant%until,olume GApercent

Jo action ( ) agitator running while ,e""elempt$

( R) cannot empt$ Breactant%+productP rom reactor A to tank AGbecau"e content o reactor i"Breactant2 .

arl$

action (-E)

reactor A cannot be flled rom

tank A becau"e there i" no 1owpath.

8ateaction(SG)

reactor A cannot be flled romtank A becau"e there i" no 1owpath.


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2atch H%P #utput#peration >e$word Con"e uence"(G)reactor Afll romtank Awithreactant%until,olume GApercent

arl$termination (to onl$

Apercent)

no con"e uence.

8atetermination (to MApercent)

( R) cannot empt$ Breactant%+productP rom reactor A to tank AGbecau"e content o reactor i"Breactant%+ productP .( R) contamination in tank AG.


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3uture #P

' % ormal "tructured language or operatingin"truction"

' 7ore guide word"#therQ %ction change other ,ariable" o the

%ction model' ?ule" or rea"onable de,iation"

#Pbetter or operating error"+ etc.H%P o "tart-up+ "hutdown+ maintenance+ etc.


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Conclu"ion"

' %utomated hazard identifcationcontinuou" operation

' commercial tool that can reduce the time o H%P

batch operation' promi"ing area o re"earch and de,elopment or

identi $ing problem" a""ociated with human error"and operating procedure"

'2eneft"Doing H%P earlier+ and on modifcation".

Con"i"tent+ repeatable+ complete hazardidentifcation method.


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%cknowledgement"

' *he work de"cribed in thi"pre"entation i" being unded b$

H%&ID *echnologie" 8tdngineering and Ph$"ical !cience"?e"earch Council+ :>

' *hank" are al"o due to m$colleague"

Dr !te,e 7cCo$7r Ding eng &hou

Computer Aided HAZOP

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