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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
What are the LOCA starts for SSW C?
-41.6" Rx water level 1.39 psig drywell pressure HPCS manual initiation
26
Is a LOP an auto start?
NO, but will start on component start
27
Will CCW auto align after a LOP?
YES
28
When will CRAC A/B auto align?
After a LOP or LOCA
29
What happens to CRAC if SSW only initiates for 1 division?
The other division doesn't have cooling water
30
What else lines up with SSW B to CRAC B?
ESF switchgear room coolers
31
When does CCW to FPCCU heat exchangers isolate?
Low flow through the heat exchanger | < 1,000gpm
32
Can FPCCU manually be aligned to SSW B?
Yes, BUT ONLY, if PSW valves are closed and no LOCA signal present
33
What happens on a SSW A/B component start? (sequence)
``` Pump starts tower fans start pumphouse ventilation starts discharge and return valve open Recirc opens If DG starts and DG inlet valve opens ```
34
What happens (sequence) on SSW A/B LOCA start?
``` 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
What happens on a LOP? (sequence)
Component start ESF switchgear room aligns (LOP components auto align)
36
When does the F018 DG inlet valve auto open? Div 1 and 2
> 200rpm on diesel
37
When do the drywell purge compressors auto align?
LOCA
38
Can it be overridden? (drywell purge compressors auto align on LOCA)
Yes
39
What's the normal level for the SSW basin?
8'5"
40
When does the Hi and LO alarm come in for SSW basin level?
HI 9'11" LO 7'9"
41
When does the fill valve open and close?
Open 8' 1.5" close 8' 8.5"
42
What position is the recirc valve in after SSW A/B starts on a LOCA signal?
Closed
43
What is not automatically cooled by SSW B on a LOCA start?
Drywell chillers, PACs, CCW heat exchangers
44
What 3 main things that are cooled by SSW B that SSW A does not cool?
Drywell chillers, PACS, CCW heat exchangers
45
What does SSW A cool that SSW B doesn't?
RCIC room cooler
46
What's the power supplies for SSW tower fans?
C003A/B 15AA | C003C/D 16AB
47
What's the purpose of the head tank?
keep discharge lines full to prevent water hammer
48
What's the power supply to the SSW pumps?
SSW A - 15 SSW B - 16 SSW C - 17
49
What's the purpose of SSW?
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
How does SSW C cool if SSW A is not running?
Natural draft
51
Are there any conditions associated with rad monitors
No
52
When will low discharge pressure alarm come in for SSW A/B?
< 73 psig after a 2 second TD
53
When will PSW valves go closed for switchgear room cooler relative to air pressure?
< 60 psig on instrument air
54
When will leak HI alarm come in for SSW A/B?
> 1200 gpm on return
55
When will leak HI alarm in for SSW C
> 50 gpm in return
56
If SSW is manually aligned to CCW and drywell chillers, what is isolated?
Plant chillers?????
57
Why is an operator dispatched to the pump room after an initiation?
Verify relief valve doesn't need re-seating
58
What is the temp of SSW maintained at? why?
85 deg F to maintain < 90 deg F basin temp
59
What should flow to SSW pumps be above?
> 3700 gpm

Module 4 - Inventory Control (8 decks)

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