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RO31 ILT > NESW > Flashcards

NESW Flashcards

1
Q

What are the NESW pump trips?

A
  • Overload
  • Overcurrent
  • Load Shed (Seq back on)
  • Load Conservation (CTS)
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2
Q

What NESW pump autostarts do you get when the switch is in Auto?

A
  • Low Header Pressure 55 psig (60 psig U2) (only when control switch in Auto)
  • SI
  • Load Shed
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3
Q

Do the NESW pump discharge valves auto open on a manual start signal?

A
  • No, they have no auto features, must be manually opened after pump start
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4
Q

If the NESW pump switch is in auto, how must the discharge valve be arranged?

A
  • It must be open, since it does not auto open on its own when the pump starts.
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5
Q

How soon after a Load Conservation can a NESW pump be restarted and how is it done?

A
  • It can be restarted after 75 secs by taking the pump switch to trip/lockout and back to on/run
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6
Q

What are the NESW pump suction sources?

A

Both Units:

  • CW Intake Tunnel (Normal)
  • Discharge Tunnel (Alt)
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7
Q

What are the NESW pump power supplies?

A
  • 11/21C (N NSEW Pump)

- 11/21B (S NESW Pump)

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8
Q

Which NESW header has the glycol loads on it?

A
  • NESW Miscellaneous Header
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9
Q

When does WMO-906 (NESW Misc header supply valve) auto close?

A
  • On a Load Conservation
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10
Q

At what DP do the NESW Duplex strainers auto backwash at?

A
  • 76” H20
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11
Q

When do both units NESW Duplex Strainer backwash alarms come in?

A

95” H20 - Unit 1

97” H20 - Unit 2

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12
Q

What does T.S. 3.6.3 B (Cnt Isolation Valves) state?

A

If 2 CIV’s are inop
WITHIN 1 hr:
- Isolate penetration

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13
Q

Which valves isolate on a load shed in the NESW system and why?

A

L.O. cooler WRV’s close:

  • maximizes flow the PAC, CAC, CLVs (If in Open Loop)
  • lowers load on EDG by lowering load on NESW
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14
Q

Which unit’s NESW supplies the Seal Oil Coolers?

A
  • Unit 2
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15
Q

Which unit’s NESW supplies the TSC Air conditioning?

A
  • Unit 1
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16
Q

When does the NESW header supply the Containment vent units, blowdown heat exchanger and blowdown sample heat exchanger?

A
  • When Containment Chill water is in Open Loop.
17
Q

What loads are on the NESW Misc Header?

A
  • Glycol Chillers
  • Ice Bin Cooling
  • Fluidizer Chiller Cndnsrs
  • Fluidizer Air Precoolers
  • Chem Cleaning Mix Tank
  • MUP
  • PHB BD Tank
  • Misc Sealing and Cooling
  • TRS Neutralization Ring Header
18
Q

What is cooled by the NESW Norm Header?

A
  • TSC Air Conditioning (U1)
  • Seal Oil Coolers (U2)
  • EHC Skid
  • MTLO Tank Coolers
  • MFP LO Coolers
  • PAC
  • CAC
  • Conductivity Room Sample
  • CHW Plate HX
  • CHW Solid Separators
19
Q

What NESW pump autostarts do you get when the switch is in neutral?

A
  • Load Shed

- SI

20
Q

What is the most important load on the NESW Misc Header?

A
  • Glycol Chillers
21
Q

What has to be done in order to reset the Lube Oil Cooler WRVs after a load shed?

A
  • All WRV Controllers have to be taken to minimum before you can push the reset button to get them to reset
22
Q

When do the LO Cooler WMOs get a close signal and when can they be operated after?

A

Load Conservation, they can be operated 75 sec after a load con

23
Q

Which Containment Isolation Valves don’t isolate on a Load Conservation?

A
  • CLV Units
24
Q

Which Containment Isolation Valves isolate on a Load Conservation?

A
  • CIR Vent Units
  • CUV Units
  • RCP Motor Air Coolers
25
Q

Where is the NESW Header Pressure sensed?

A
  • Downstream of the Strainer but before the Discharge check valve
26
Q

What is the Power Supply to the NESW Motor outlet Valves?

A

600v AC

27
Q

What is the Power Supply to the NESW Strainers?

A

600v AC

28
Q

What occurs in the NESW Sys on a Load Conservation?

A
  • Lube Oil Motor Op Valves (WMO’s) Automatically Close
  • NESW (inlet) CIV’s Automatically close: for CUV’s IR Vent Units, and MAC’s
  • Unit Crosstie Valve to Misc Header automatically closes (ie. Glycol)
  • NESW Pp trips W/CTS signal (Can be restarted after 75 sec by going to Trip/Lockout)
29
Q

What occurs in the NESW System on a Loadshed?

A
  • NESW Pp trips and Seq back on
  • L.O. cooler (WRV’s) close:
    which maximizes flow the PAC, CAC, CLVs
  • lowers load on EDG by lowering load on NESW
30
Q

Which Containment NESW Load(s) DO NOT have Backup Air Bottle(s) for the CA to the NESW Cntmt Isol Vlv(s)?

A

RCP Motor Air Coolers CIVs

31
Q

IF you have a CTS, then reset SI, NESW pumps which were NOT running prior to event will?

A

Restart unless locked out.

RO31 ILT (56 decks)

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