List 1

Question 1

State the system code for the primary circuit

Answer 1

M

Question 2

List the 3 containment boundaries

Answer 2

Primary
Intermediate
Secondary

Question 3

What is the function of the steam generators

Answer 3

A) Produce high quality steam for the operation of the main and turbo generator (TG) turbines and auxiliary steam systems

B) Remove decay heat from the reactor core using the SG cool-down system

Question 4

List 5 items from SG drawing

Answer 4

1) separator assembly
2) driers
3) kinetic head destroyer
4) feed water inlet nozzle
5) SG main support
6) downcomer
7) tube bundle assembly

Question 5

What is the function of the auxiliary steam system

Answer 5

To supply steam at a constant pressure of 14 bar to the following:
A) main air ejectors
B) gland steam system
C) distilling plant calorifiers

Question 6

Label main steam system diagram

Answer 6

214 = TGCSEV
212= dump steam valve 
202=MTETV
215=main steam cross connection 
402=MSSV

Question 7

Describe the basic operation of the glad steam system

Answer 7

Steam is supplied to the gland steam system manifold from the auxiliary steam system at a pressure of 14 bar. Steam from the gland steam manifold passes through cascade trim valves to the following:

A) generator turbine shaft gland pockets
B) main turbine shaft gland pockets

Question 8

State 2 components of the steam drain system

Answer 8

1) Yarway steam trap

2) key trap

Question 9

Why is there a separating wall between the ahead/astern sections of the main turbine

Answer 9

Prevent steam leakage between them

Question 10

What is the system code for the primary relief system

Answer 10

R

Question 11

What are the functions of the main circulating water system

Answer 11

A) provide a flow of calling water to the main condenser so that optimum condenser vacuum and steam conditions can be maintained in the main turbines and TG’s

B) supply the after stern tube bearing with water for cooling and lubrication

C) provide a supply of water to the clean sea water system

Question 12

Describe the construction of the clean sea water system pump

Answer 12

Is a glandless, canned centrifugal pump. Each pump is solidly mounted on its own side main condenser hotwell

Question 13

List 4 items from cooled by the Fwd ship’s fresh water cooling system

Answer 13

1) chilled water plants
2) 70kw MG sets
3) 35kw MG sets
4) 10kw MG sets
5) H2 burners
6) R12 removal unit

Question 14

What does S.L.I.V stand for and what does it do

Answer 14

Surge Line Isolating Valve

Provides a means of isolating the pressuriser from the primary circuit in the event of a pressuriser leak circuit when the valve is shut, provided pressuriser pressure is greater than RPV pressure

Question 15

What order do the primary relief valves reset

Answer 15

High, low, steam

Question 16

What is the function of the coolant treatment system

Answer 16

A) to remove soluble and suspended radioactive corrosion and fission products from the primary coolant during reactor operation, whilst assisting to maintain the pH

B) provide a connection to the sampling system before and after the ion exchange column

C) ensures water discharged from the primary circuit is at its lowest level of contamination

D) removal of decay heat using the non regen cooler when in LPDHR

Question 17

Coolant discharge system- where does the HP discharge go

Answer 17

A) discharge to the MUD vessel

B) overboard via D406

Question 18

What are the 3 sub sections of the coolant make up system

Answer 18

1A) recirculation system (normal)
B) Back up system (de-ox/demin system)
C) emergency system

Question 19

Components of the primary shield system

Answer 19

A) A steel tank surrounding the reactor pressure vessel (RPV) which contains:

1) RCFW cooling coils
2) Neutron Detectors
3) Core catcher
4) test source track

B) a shield water tank with interconnecting piping and valves

Question 20

2 methods of using the HPDHR system

Answer 20

1) forced high pressure decay heat removal FHPDHR

2) natural high pressure decay heat removal NHPDHR

Question 21

What is the system code of the coolant treatment system

Answer 21

W