Week 5

Question 1

What is PWR

Answer 1

Pressurised water reactor

Question 2

What is housed inside fuel plates?

Answer 2

Uranium 235

Question 3

What material is inside control rods?

Answer 3

Halfnium

Question 4

How do we define reactor critical?

Answer 4

When neutrons from next generation = those from previous

Question 5

How do we define self sustaining reactor?

Answer 5

Reactor critical generating enough to not require shore supply

Question 6

What is scram and how do we do it?

Answer 6

Stopping the reaction via insertion of control roads

Question 7

What are the 2 modes of reactor scram?

Answer 7

• Automatic

- Manual

Question 8

What control rod group does a partial scram use?

Answer 8

Group 3

Question 9

How many control rods are dropped in during full scram?

Answer 9

All 4 groups

Question 10

Name all plant states

Answer 10

• A
• H
• B
• C

Question 11

Name the containment boundareis

Answer 11

• Primary

- Secondary

Question 12

Describe the primary containment boundary

Answer 12

Submarine Hull surrounding RC RSC and tunnel

Question 13

Describe the secondary containment boundary

Answer 13

Minimum- Pressure Hull enclosed by 26 and 88 bulkhead

Maximum- The entire pressure hull

Question 14

What are the components of the primary system?

Answer 14

• RPV
• Control rods
• Primary circuit
• Pressuriser
• Fuel
• CRDM
• MCP
• SG

Question 15

Describe the pressuriser

Answer 15

Vessel half filled with water with a steam bubble at the top

Question 16

Main hazards of primary circuit

Answer 16

• Radiological
• Temprature
• Pressure

Question 17

Name the components of the secondary system

Answer 17

• Main engine
• TGs
• Condensor
• Circulating water
• Feed water

Question 18

What are the hazards of the secondary system?

Answer 18

• Rotating equipment
• Steam
• Electrical
• Noise

Question 19

What is the function of the gearbox?

Answer 19

• Transfer motion from steam turbine to shaft

- Allow use of EPM

Question 20

Where is Electronic propulsion motor supplied from?

Answer 20

Supplied from DC

Question 21

What’s the function of thrust block?

Answer 21

Transmit propulsive force to boats structure

Question 22

Function of stern seal

Answer 22

• Support shaft
• Prevent water ingress
• Inflation mechanism when shaft stops

Question 23

Why do we use propulsor over propellor?

Answer 23

• More efficient

- Prevents cavatation

Question 24

How many main coolant pumps do we have?

Answer 24

4

Question 25

Key operating parameters of primary circuit

Answer 25

• Pressure
• Flow
• Temprature

Question 26

What 6 people must be on watch when the reactor is critical?

Answer 26

• MRS
• RPO
• EPO
• METOW
• MMSS
• MMSWK

Question 27

What is full power inout

Answer 27

2f2f

Question 28

Half power

Answer 28

2s2s

Question 29

What does main lub oil lubrictae

Answer 29

• Main engines
• TG
• Gearbox and shaft
• Main circ pump bearing

Question 30

What are the 8 parameters of the secondary system?

Answer 30

• Steam pressure
• Sg level
• Condensor vaccum
• Condensor or hotwell level
• Feed pump discharge pressure
• Feed water chemistry
• SFWC temoratures
• Lub oil temp and pressure
• Voltage and frequency

Question 31

What temperature must the supply of chilled water be at?

Answer 31

6.5c +/- 1c

Question 32

What is the system code of the chilled water system?

Answer 32

AC

Question 33

What are the key parameters of the chilled water system?

Answer 33

• Temp to High/Low
• Pressure drop
• Tank capacity

Question 34

Who controls chilled water system?

Answer 34

EPO via pms

Question 35

Where is the chilled water plant operated from?

Answer 35

Freon flat

Question 36

How many cooling units are in the sonar cabinet space?

Answer 36

3