ELA973 SAChE Hazards and Risk Safeguards Other Than Relief Systems

Which of the following are loss events?

• release of toxic gas

• rupturing of pressure vessel

three aspects of a process design that particularly relate to process safey and safeguards are:

process controls

siting and layout

primarty containment system

the BPCS is

automatic control

T/F Safeguards make a process inherently safer

False

Safeguards that interrupt the chain of events following an initiating event and keep a loss event from occurring are called:

preventative safeguard

Which are true regarding an initiating event?

It transitions… abnormal situation

It can be… external event

T/F The vessels, piping, and associated equipment that are in direct contact with the process material constitute the Secondary Containment System.

false

In this unit, a safeguard is defined as:

Any device, system, or action that either interrupts the chain of events following an initiating event or that mitigates the consequences.

Drag the following chain of events for a hazard to the proper order

1) process hazard 2) initiating event 3) deviation 4) loss event 5) impact

how many basic types of safeguards are there?

two

which phrase below describes the safegurds that do not use instrumentation to perform their safety function?

physical protection systems

what are four types of preventative safeguards

automatuc safety systems

BPCS

pressure protection

human response

which of the following is NOT a basic component of an automatic safety system

an operator response to an alalrm that sounds…. safety limit

T/F safety functions can be incorporated or programmed into thw basic process control system

True

t/f preventative safeguards interrupt the chain of events that start with an initiating event and results in a loss event.

true

T/F an operator successfully executing a normal process unit startup procedure is a preventative safeguard

false

T/F operator intervention based on awareness, detection, and response can be a preventative safeguard

true

Preventative safeguards include those that are:

pressure protection

automatic safety

implemented in the basic process control system

human response actions

T/F in the process industries, a Safety Instrumented System is an automatic safety system that is intended to comply with the IEC 61511 international standard

true

t/f for operator response to a safety alarm to be an effective preventative safeguard, the operator needs to be alerted soon enough, and corrective action taken quickly enough, to avoid a loss event

true

T/F most pressure protection systems are physical protection systems

true