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ANO1 ILO 2022 > MUP > Flashcards

MUP Flashcards

1
Q

Purpose of makeup and purification system

A
  • Supply RCS with fill and operational M/U water
  • Provide seal injection and seal return for RCPs
  • Provide purification of RCS
  • Control Boric Acid and Chemical Control
  • Deal with changes in RCS volume
  • Supply borated water to CFT
  • PZR aux spray source
  • Borated water injection for ES
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2
Q

Design Basis

A
  • Control RCS inventory and boric acid via letdown/makeup
  • Purify letdown (max flow 160gpm, min 45 gpm=1 vol/day)
  • Accommodate for thermal expansion
  • ES
  • ECCS
  • long term cooing after loca
  • emergency boration
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3
Q

Which valves of letdown coolers get an ES signal?

A

the outlet valves

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4
Q

Is leakage from a letdown cooler pressure boundary leakage?

A

Yes, until that cooler is isolated.

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5
Q

Letdown coolers - tube side is ___, shell side is _____

A

RCS

Nuke ICW

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6
Q

Explain letdown isolation valve timing

A

When opening, the ICW inlet opens for 20 sec, then the LD valve opens

When closing, the LD valve closes for 8 sec, then the ICW valve closes

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7
Q

What is the expansion tank for after the letdown coolers?

A

N-16 decay, minimizes dose in people space

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8
Q

What is CV-1221?

A
  • Closes on ES 2
  • UNPPR
  • only single valve that can normally isolate letdown,
  • ALSO closes if letdown @ 135F to protect resin
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9
Q

When is MU-4 used and why?

A

used in a shutdown condition to ensure adequate flow in letdown line.

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10
Q

When is MU-4 used and why?

A

used in a shutdown condition to ensure adequate flow in letdown line.

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11
Q

Explain Gross/iodine ratio

A

Gross goes up = ratio gets bigger = crud burst

iodine goes up = ratio goes down = fuel failure

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12
Q

Flow Limits for m/u filters, l/d coolers, demin.

How many gpm to turn over 1 rcs/day?

A

45 gpm min letdown flow = 1 RCS/day
80 gpm max per M/U filter
87.5 gpm max per L/D Cooler
123 gpm max per L/D Demin

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13
Q

What is CV-1223?

A

Letdown orifice bypass flow control valve
closed post trip to minimize letdown flow

fails closed on loss of IA

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14
Q

Where does PSV-1236 relieve to?

A

ABEDT

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15
Q

Letdown Demin T-36s - which is aligned, why?
What valves fail?
Max and Min flow?

A
  • B is normally aligned, A is for Delith
  • Inlet valves fail closed on loss of IA or loss of Y-02
  • 25 gpm - 123 gpm
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16
Q

Discuss Letdown 3-way valve CV-1248 and any setpoints.

A

if MUT is 18”, 1248 auto realigns to letdown position

Feed/Bleed I/L prevents inadvertent dilution of RCS

17
Q

Discuss Makeup filters F-3A/B

A
  • Max diff press 75 psid, alarm at 25 psid
  • Max Flow is 80 gpm per filter
  • air to open, inlet valves fail closed on loss of power or IA
18
Q

How does CV-1222 fail?

A

Fails as-is on loss of IA to revert to 45 gpm

19
Q

Discuss Makeup tank T-4

A

-normal level 55-86 in
-Vent valve 1257 vents to vac degas and auto opens at 18” in T-4
ALSO aligns 1248 3-way valve to letdown if in bleed
-Relief valve at 100 psig, not designed to relieve water
-Lo/Hi press <10/>90psig

20
Q

What is normal MUP discharge pressure?

A

2750psig

21
Q

Discuss MUP ES actuation.

A
  • ES 1 and 2
  • MOD aligned to OP pump bus (a-3/4), Opposite train brkr open
  • A & C pumps start after 5 second delay (EDG loading)
  • B pump starts after 7 second delay IF A-3/4 MOD is closed, ‘A’/’C’ HPI not running, A-3/4 energized with normal volts
  • HPI iso vavles open
  • Recirc valves 1300 & 1301 close (min 55 gpm recirc on pump)
22
Q

What does MUP suction relief valve lift @ and where to?

A

450 psig to the ABEDT

23
Q

MUP electric oil pump auto starts when pump gets an ES signal and turns off __ seconds later

A

20 seconds

24
Q

Aux lube oil pump starts at __ psig

A

6 psig

25
Q

Discuss CV-1235 PZR level control valve

A
  • M/U thru D HPI line
  • Fails as-is
  • bypass with 1” needle valve prevents thermal shock to HPI nozzle
26
Q

Discuss CV-1235 PZR level control valve

A
  • M/U thru D HPI line
  • Fails as-is
  • bypass with 1” needle valve prevents thermal shock to HPI nozzle
27
Q

Discuss CV-1207 Seal Inj flow control valve

A

-Fails open on loss of IA

28
Q

Discuss CV-1206 Seal Injection Block Valve

A

-Auto closes on <22gpm in anticipation of MUP restart, protects seals from water hammer

29
Q

Discuss F-2 seal inj filter press/temp/flow numbers

A

Design: 3050psig, 200F. 60 gpm

Normal: 2600psig, 130F, 40 gpm

30
Q

F-2 Seal Inj filter L&P

A

Max DP: 150 psid
Replace at 25 psid
Max flow: 60 gpm

Hi alarm at 25 psid

31
Q

Seal Return es channels

A

CV-1270-1273 – ES 1 Close

CV-1274 – ES 2 Close

32
Q

HPI isolation valves ES channels

A

ES 1 – CV-1219, 1220, 1278, 1279

ES 2 – CV-1227, 1228, 1284, 1285

33
Q

HPI Isolation Valves Flows

A
  • Hi flow alarm = >450 gpm total
  • Hi flow alarm = >140 gpm single line
  • lo flow alarm = <200 gpm total
34
Q

When do we have Pressurized Thermal Shock Limits?

A

Applied when HPI is on and RCPs are all off

35
Q

CV-1234 RCS M/U valve ES actions

A

receives a close signal

36
Q

HPI pump oil press trip

A

3 psig

37
Q

3.5.2 Two ECCS trains operable

A

modes 1 & 2

Modes 3 with RCS >350F

38
Q

3.5.4 BWST operable

A

Modes 1, 2, 3, & 4

39
Q

2 Makeup pumps functional in what modes

A

mode 3 with RCS <350F

mode 4

ANO1 ILO 2022 (12 decks)

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