Please see attached - PLEASE AWNSER PART A

Used fuel is stored in cooling ponds prior to longten\" storage. Coolant water Wat 23%\". for 5 years nd the uid may be assumed hydrostatic with a head of 5m above the caskets. ?m E-rn spent i ht bottom is hatch hinged at a height \"x\" above the datum of the pond. This hatch is designed to remain shut unless the height "h" of the coolant in the pond exceeds 13m. The shape of this hatch is circular having a diameter D. If the ttuid height \"h\" is exoeeded. the hatch will ip open releasing coolant into a bleed valve. Thus activating a hydraulic sensor and alerting the oontrol room. PART A - Find the Eocation of the hinge axis in order for the door to ip open when the control metric is breached {show how you calculate the centre of pressure for this particular hatch], then show that the change in hydrostatic pressure of the coolant water may be written in the format: P1 + pg _P3'dh = 31- F1 PART B: Show diagrammatically how a apper nozzlevalve could be send a signal to a control loop. {m the mass ow rate through the valve sensor}. Finally. explain why the choice of using a manometer instrument would not be a \"good choioe\" in this particuiar application Remember, the centre of pressure at the hatch is the ratre of its 2"\" moment of area: t\" moment of area about the hatch surfs-es. Aiso, remember to define the uid parametera that need to he\" mm forexampie. in the use of the apper nozzle in order to process the signal to the control room