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Module 4 - Inventory Control > P41 - SSW > Flashcards

P41 - SSW Flashcards

1
Q

What are the types of auto starts for SSW A/B, and what is cooled with each type of start?

A

Component start - cools that component

LOCA - cools all divisional components

Manual initiation - cools all divisional components

LOP - switchgear room

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2
Q

What powers the logic to each SSW pump?

A

A - 11DA

B - 11DB

C - 11DC

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3
Q

What are the SSW A/B pump and fan trips?

Will pumps re-start when power is restored?

A

MPD and LOP

YES

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4
Q

How does SSW C auto start regardless of the signal?

A

Return valve opens, THEN

10 seconds later - Pump starts

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5
Q

If H22-P152 is placed in ON position what features are lost?

A

Control room indication
hand switches
Auto start features are disabled for Div 1

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6
Q

What will cause a component start for SSW A?

A

RHR A/LPCS breaker closed
E51-F045 not full closed (RCIC steam supply)
Diesel > 200 rpm

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7
Q

What will cause a component start for SSW B?

A

RHR B/C breaker closed

Diesel > 200 rpm

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8
Q

How does the make-up valve F113 respond to a LOCA?

A

closed and cannot be re-opened until signal is clear

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9
Q

When does the makeup valve F113 open/close?

A

Open 17”

Close 33.5”

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10
Q

When does the HI/LO Alarm come in for the head tank

A

Hi 41”

Low 17”

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11
Q

Can SSW fan be secured with auto initiation signal sealed in?

A

NO

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12
Q

Where can fans be operated from?

A

P870, remote shutdown panel, and alternate shutdown panel (P299)

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13
Q

What’s the make-up water for SSW?

A

PSW (P21 back-up)

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14
Q

How long is SSW available with no make-up water

A

30 days

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15
Q

How much water is in the SSW basins?

A

15 million gallons

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16
Q

What do the blowdown valves do on a LOCA signal?

A

Close and cannot be opened until signal is clear

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17
Q

Where can Div 1 blowdown valve be operated from other than the main control room?

A

Alternate Shutdown Panel

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18
Q

What’s the purpose of the recirc valve F002A/B?

A

It’s throttled and de-energized to maintain pump discharge below relief valve setpoint

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19
Q

When will it auto close? (recirc valve)

A

Auto start and heat exchanger inlet/outlet are full open or if LOCA or CTMT spray signal present

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20
Q

Can it manually be opened with LOCA or CTMT spray signal sealed in? (recirc valve)

A

NO

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21
Q

When does the discharge valve F001A/B open?

A

On auto start signal and cannot be closed until the signal is clear

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22
Q

When does the F005 A/B test return auto-open?

A

on auto start

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23
Q

is it throttleable?

A

Yes during normal OPS (no auto start)

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24
Q

What are the COMPONENT auto starts for SSW C?

A

HPCS breaker closed

DG > 800 rpm

25
Q

What are the LOCA starts for SSW C?

A

-41.6” Rx water level
1.39 psig drywell pressure
HPCS manual initiation

26
Q

Is a LOP an auto start?

A

NO, but will start on component start

27
Q

Will CCW auto align after a LOP?

A

YES

28
Q

When will CRAC A/B auto align?

A

After a LOP or LOCA

29
Q

What happens to CRAC if SSW only initiates for 1 division?

A

The other division doesn’t have cooling water

30
Q

What else lines up with SSW B to CRAC B?

A

ESF switchgear room coolers

31
Q

When does CCW to FPCCU heat exchangers isolate?

A

Low flow through the heat exchanger

< 1,000gpm

32
Q

Can FPCCU manually be aligned to SSW B?

A

Yes,

BUT ONLY, if PSW valves are closed and no LOCA signal present

33
Q

What happens on a SSW A/B component start? (sequence)

A 
Pump starts
tower fans start
pumphouse ventilation starts
discharge and return valve open
Recirc opens
If DG starts and DG inlet valve opens
34
Q

What happens (sequence) on SSW A/B LOCA start?

A 
Like component start, EXCEPT:
Recirc close
Blowdown closes
RHR heat exchanger IN and OUT open
SSW tank outlet closes
(Normal/LOCA components align and/or isolate
35
Q

What happens on a LOP? (sequence)

A

Component start
ESF switchgear room aligns
(LOP components auto align)

36
Q

When does the F018 DG inlet valve auto open? Div 1 and 2

A

> 200rpm on diesel

37
Q

When do the drywell purge compressors auto align?

A

LOCA

38
Q

Can it be overridden? (drywell purge compressors auto align on LOCA)

A

Yes

39
Q

What’s the normal level for the SSW basin?

A

8’5”

40
Q

When does the Hi and LO alarm come in for SSW basin level?

A

HI 9’11”

LO 7’9”

41
Q

When does the fill valve open and close?

A

Open 8’ 1.5”

close 8’ 8.5”

42
Q

What position is the recirc valve in after SSW A/B starts on a LOCA signal?

A

Closed

43
Q

What is not automatically cooled by SSW B on a LOCA start?

A

Drywell chillers, PACs, CCW heat exchangers

44
Q

What 3 main things that are cooled by SSW B that SSW A does not cool?

A

Drywell chillers, PACS, CCW heat exchangers

45
Q

What does SSW A cool that SSW B doesn’t?

A

RCIC room cooler

46
Q

What’s the power supplies for SSW tower fans?

A

C003A/B 15AA

C003C/D 16AB

47
Q

What’s the purpose of the head tank?

A

keep discharge lines full to prevent water hammer

48
Q

What’s the power supply to the SSW pumps?

A

SSW A - 15
SSW B - 16
SSW C - 17

49
Q

What’s the purpose of SSW?

A

Remove heat from plant auxiliaries that require cooling during emergency shutdown

Ultimate heatsink for decay removal

CTMT/DW flooding

Cooldown components during normal cooldown

50
Q

How does SSW C cool if SSW A is not running?

A

Natural draft

51
Q

Are there any conditions associated with rad monitors

A

No

52
Q

When will low discharge pressure alarm come in for SSW A/B?

A

< 73 psig after a 2 second TD

53
Q

When will PSW valves go closed for switchgear room cooler relative to air pressure?

A

< 60 psig on instrument air

54
Q

When will leak HI alarm come in for SSW A/B?

A

> 1200 gpm on return

55
Q

When will leak HI alarm in for SSW C

A

> 50 gpm in return

56
Q

If SSW is manually aligned to CCW and drywell chillers, what is isolated?

A

Plant chillers?????

57
Q

Why is an operator dispatched to the pump room after an initiation?

A

Verify relief valve doesn’t need re-seating

58
Q

What is the temp of SSW maintained at? why?

A

85 deg F to maintain < 90 deg F basin temp

59
Q

What should flow to SSW pumps be above?

A

> 3700 gpm

Module 4 - Inventory Control (8 decks)

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