SP1

Question 1

System code for primary circuit

Answer 1

M

Question 2

3 Containment Boundaries

Answer 2

Primary, Secondary and Intermediate.

Question 3

What is the function of the steam generator?

Answer 3

Produce high quality steam for the Main + Turbo Generator and supply the Auxiliary steam system.
Also removes decay heat from the reactor using SG cooldown system.

Question 4

List items on the Steam Generator diagram

Answer 4

Tube bundle assembly
Drier
Downcomer
Feedwater inlet nozzle
Separator
SG Shell
Kinetic head destroyer

Question 5

What is the function of the Auxiliary Steam System?

Answer 5

Supply steam at a constant pressure of 14 Bar to the Gland Steam System, Main Air Ejectors and Braby.

Question 6

Describe the basic operation of the Gland Steam System

Answer 6

Auxiliary steam system (14 bar)—->Gland Steam Supply Manifold—–>Cascade Trim Valves—–>Main Turbine and Generator turbine shaft gland pockets

Question 7

State 2 components of the Steam Drain System

Answer 7

Yarway Steam trap
Key trap
Back pressure relief valve

Question 8

Why is there a separating wall between the ahead and stern sections of the main turbine?

Answer 8

To prevent steam leakage between the 2

Question 9

What is the system code for the Primary (R)elief System?

Answer 9

R

Question 10

What are the functions of the Main Circulating Water System?

Answer 10

Provide water at a constant pressure to the Main Condensers which creates correct steam and pressure conditions in Main Turbines and Turbo Generators
Supplies the after stern bearing with water for cooling and lubrication
Supplies clean sea water system

Question 11

Describe the construction of the Clean Sea Water System Pump

Answer 11

Glandless canned centrifugal pump which is solidly mounted on its own side main condensor

Question 12

List 4 Items cooled my the ships FWD fresh water cooling sytem

Answer 12

CW Plants
70kw MG Sets
35kw MG Sets
10kw MG Sets
H2 Burners
R12 Removal units

Question 13

What does SLIV stand for and what does it do?

Answer 13

Surge line isolation valve

Provides a means of isolating the pressuriser in the event of pressure leak

Question 14

In what order do the primary relief valves reset?

Answer 14

1. High
2. Low
3. Steam

Question 15

What is the function of the Coolant treatment system?

Answer 15

Removes soluble and suspended fission product from the coolant in order to allow access to the reactor core after shutdown.
Gives a connection to the sampling system before and after the ion exchange column.
Ensures water discharged is at the lowest possible radioactive level.
Removal of decay heat during LPDHR

Question 16

In the coolant discharge system where does HP discharge go

Answer 16

MUD Vessel

Overboard

Question 17

What are the subsections of the coolant makeup system?

Answer 17

Recirculation
Back up
Emergency

Question 18

What are the components of the Primary Shield System?

Answer 18

Neutron Detector
Core Catcher
Test Source Trace
RCFW Cooling Coils
A shield water header tank with interconnecting piping and valves

Question 19

What are the methods of using HPDHR

Answer 19

Forced

Natural

Question 20

System code for Coolant discharge system

Answer 20

W

Question 21

Functions of the EPM

Answer 21

The EPM is provided as a ‘back up’ or emergency facility to support the main propulsion system in the event of:

• Failure at sea of the Nuclear Steam Raising Plant
• Failure at Sea of both Main Engines
• The provision of propulsion with the NSRP shutdown