Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Systems > Shield Cooling > Flashcards

Shield Cooling Flashcards

1
Q

Is the shield cooling system safety related and what is its purpose?

A

Not safety related.

Closed loop cooling system

Removes heat from the biological shield surrounding the reactor vessel thereby limiting stresses in the structural concrete.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the design function of the shield cooling system?

A

Maintains structural concrete temperature less than 165°F

Maximum normal heat load on the system at full power is 120,000 BTU/hr.

  • Each coil set is capable of removing 180,000 BTU/hr
  • Heat Exchanger is capable of removing 200,000 BTU/hr
  • Each pump is capable of handling 100% of the required cooling water flow for removing 180,000 BTU/hr.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

P-77A/B, Shield Cooling Pumps

A

P-77A/B, Shield Cooling Pumps

Capacity - 180 gpm each (100%)

Discharge Pressure –approximately 61 psig

P-77A from MCC 2

P-77B from MCC 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

P-77A/B auto starts how?

A

Pump control switch in “Pull to Standby”

PS-0935 at 35 psig starts pump

  • Brings in EK-1302
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

E-64, Shield Cooling Heat Exchanger

A

E-64, Shield Cooling Heat Exchanger

Heat Removal - 200,000 BTU/hr

Shell - CCW

  • Normal Flow 126 GPM
  • CHP - 0 GPM

Tube - Shield Cooling Water

HX outlet butterfly valve (MV-CC106) is manually throttled to control system temperature.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Shield Wall Cooling Coils

A

Shield Wall Cooling Coils

Two sets of coils with 3 coil sections in each set

Design Pressure – 75 psig

Design Temperature – 200°F

Normal flow rate is 38 to 43 gpm per coil section and 134 to 154 gpm per coil set (wall section + slab section = coil set).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

CV-0932 & CV-0934, Coil Inlet Supply Valves

A

CV-0932 & CV-0934, Coil Inlet Supply Valves

Air operated, fail open diaphragm valves

C-08/03

  • Two position OPEN-CLOSE key operated switch
  • Red and Green position indicating lights

Interlocked with associated flow alarm so that when valve is closed, low flow alarm is bypassed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the shild wall coil relieve at?

A

Each wall coil has a relief valve for overpressure protection due to thermal expansion (100 psig)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the flow indications for wall coils?

A

FI-0928, FI-0929, FI-0931 for A Coil

FI-0934, FI-0935, FI-0936 for B Coil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What temperature indications are there in the control room?

A

TE-0931 (TE-0933) – provides control room indication

High temperature alarm at 120°F via TIA-0931 (TIA-0933)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What alarms on low flow?

A

FS-0932 (FS-2104) – provides control room alarm when in-service coil flow decreases to ≤ 80 gpm

Alarm bypassed when inlet supply valve CV-0932 (CV-0934) is closed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the design of the Floor Slab Coils?

A

Two sets of coils with each having 1 section

Design Pressure – 75 psig

Design Temperature – 200°F

Normal flow rate through floor coil is 20 to 25 gpm

Local flow and temperature indication

  • FI-2110 (FI-2111)
  • TI-2110 (TI-2111)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

T-62, Shield Cooling Surge Tank

A

T-62, Shield Cooling Surge Tank

  • Capacity - 1,700 gallons
  • Design Pressure - 50 psig
  • Design Temperature - 200°F

Maintains positive suction head on Shield Cooling Pumps.

Provides surge volume for Shield Cooling Water expansion and contraction.

Provides a point for the addition, recirculation and sampling of chemicals for the system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

CV-0927 Shield Cooling Surge Tank Makeup Valve

A

CV-0927 Shield Cooling Surge Tank Makeup Valve

Air operated diaphragm valve – fails closed

Level Switch (LS-0927) controls tank level

  • Opens valve at 23% (34”) and closes valve at 86% (74”)

Makeup supplied from T-81, Primary System Makeup Water Tank

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

CV-0939 Containment Isolation

A

CV-0939 Containment Isolation

C-13 by two-position OPEN-CLOSE control switch

Automatically closes on Containment High Pressure (CHP) or Containment High Rad actuation (CHR)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

EK-1303, “REACTOR SHIELD CLG LO FLOW”

A

EK-1303, “REACTOR SHIELD CLG LO FLOW”

  • Actuated by FS-0932 (FS-2104) at 80 gpm
  • Check one pump running
  • Shift in-service coils
  • If necessary, start standby pump
17
Q

EK-1302, “REACTOR SHIELD CLG PUMPS DISCH LOW PRESS

A

EK-1302, “REACTOR SHIELD CLG PUMPS DISCH LOW PRESS

  • Actuate by PS-0935 at 35 psig
  • Standby pump starts on low pressure
  • Verify standby pump starts - align switches
  • Check surge tank level normal
  • If low pressure is due to leakage then shift in-service coils
18
Q

EK-1301, “SHIELD CLG PUMPS TRIP

A

EK-1301, “SHIELD CLG PUMPS TRIP

  • Actuated by “b” contact in breaker
  • Standby pump starts at 35 psig lowering
  • Verify standby pump starts – align switches
  • If both pumps tripped or cannot be started, then initiate plant shutdown
19
Q

EK-1304, “REACTOR SHIELD CLG HI TEMP”

A

EK-1304, “REACTOR SHIELD CLG HI TEMP”

  • Actuated by TIA-0931 (TIA-0933) at 120°F
  • Check coil outlet temperature
  • Check CCW to CNTMT normal
  • Start standby pump
  • Place standby coil in service
  • If flow cannot be restored and Shield Cooling Return temperature rises to greater than 165°F, then initiate plant S/D
20
Q

EK-1305, “SHIELD CLG SURGE TANK T-62 HI LO LEVEL”

A

EK-1305, “SHIELD CLG SURGE TANK T-62 HI LO LEVEL”

  • Actuated by LIA-0927, High – 95%, Low – 4.5%
  • CV-0927, Surge Tank Makeup Control Valve opens at 23%, closes at 86%
  • If high level, then close CV-0939, Shield Cooling Surge Tank Inlet Isolation until level returns to normal
  • If low level, then check open CV-0939, Shield Cooling Surge Tank Inlet Isolation and one P 79, Primary System M/U Transfer Pump running
  • If necessary, then bypass CV-0927, Surge Tank Makeup Control Valve using MV CD148, Shield Cooling Makeup CV Bypass
  • If level remains high, then direct Chemistry Department to check for CCW in-leakage
  • If level remains low, then check for leakage by shifting in-service coils
21
Q

SOP-29 Requirements

A

SOP-29 Requirements

Shield Cooling System shall be in operation prior to PCS temperature exceeding 165°F

Minimum flow

  • Shield wall coil 30 gpm
  • Floor slab coil 20 gpm

Maximum system flow

  • 154 gpm; limited by heat exchanger.

Flow Balancing

  • Minimum ratio – 5 (wall coil) to 1 (floor coil)

Systems (53 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions