Figure $2($on the next page$)$ is the P&ID for the equipment used in the bulk

pharmaceutical production of Compound X$.$ Compound X is formed via the

controlled addition of Reactant B $($from vessel F$2)$ into a solution of Reactant A in

vessel F$3$; vessel F$3$ is continuously agitated during the addition. Since the reaction

is dangerously exothermic, the addition rate of Reactant B is controlled by the orifice

plate, OP$1,$ such that the temperature in vessel F$3$ is maintained between $55$ and $60$

$$C$.$ To ensure the safe operation of the process, the rate of addition of B is controlled

at $2$ kg min$-1$

$($via OP$1)$ and the temperature in F$3$ is kept above $40$C$.$

Firstly, construct an appropriate HAZOP template.

$(2$ marks$)$

Then perform a HAZOP on the controlled addition of Reactant B from F$2$ to F$3$ as

follows:

$-$ develop two valid scenarios for $$NO FLOW$$

$-$ develop one valid scenario for $$MORE FLOW$$

$-$ develop one valid scenario for $$NO STIRRING$$

$-$ develop one valid scenario for $$ELSEWHERE FLOW