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Public 2022 > 40AO-9ZZ02 Excessive RCS Leakage > Flashcards

40AO-9ZZ02 Excessive RCS Leakage Flashcards

1
Q

What are the major actions for RCS Leak

A
  • Start all CH pumps
  • Isolate LD
  • Trip the Rx
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2
Q

What alarms require an isolation of LD

A

If ALL following alarms

  • RHX high temp
  • LD line low press
  • LD Rad monitor low flow
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3
Q

If LD leak is indicated in Aux Bldg, how long do you have to isolate

A

10 Min TCA

prevents spread of contamination

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4
Q

How long do you have to determine RCS leak rate after RU-1 Alarm

A

1 Hour

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5
Q

What are the major actions for a leak on disch. of CH pumps

A
  • Isolate LD
  • Stop all CH pumps
  • Perform 40AO-9ZZ05 loss of CH or LD
  • Align alternate disch. path
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6
Q

When aligning CH pump alternate disch. path what is the preferred lineup and why

A

A HPSI cold leg preferred

B HPSI Hot leg causes larger thermal stress

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7
Q

What is made inoperable when alternate CH discharge path is aligned

A

HPSI path used is inoperable

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8
Q

What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge

A

Cold Leg injection path >1525 psig

vlvs may not open with high DP

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9
Q

What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge

A

Cold Leg injection path >1525 psig

vlvs may not open with high DP

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10
Q

with SIT in-leakage when do the SIT’s become inoperable

A
  • > 625 psig
  • > 72% NR level
  • <2300 ppm boron
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11
Q

What are the major actions for PZR safety vlv leakage

A
  • Ensure BOTH Pzr fans are running
  • Lower Prcs to just above 2160 psia
  • Monitor for further leakage
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12
Q

How long do you have to isolate an RCS leak in the SI pump rooms

A
  • 30 Minutes
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13
Q

What are the major actions for a RCP HP Seal cooler leak

A
  • Trip the Rx
  • Verify Rx control!
  • Stop Affected RCP
  • Isolate Bleedoff to affected RCP
  • Isolate Affected HPSC
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14
Q

What do you do if you cannot isolate a leaking HPSC

A
  • Stop all RCP’s
  • Isolate Bleedoff
  • Close NC CIV’s
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15
Q

How long do you have to Isolate a HP Seal Cooler leak

A
  • 16.67 minutes
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16
Q

What is required if NC activity >60 Ci

A

commence plant shutdown

17
Q

How is a SG tube leak < 1 gpm determined

A
  • Chemical analysis

- Radiation monitoring

18
Q

What are the differences between RU-141 channels 1/2 (AR filter)

A
  • A Actuates
  • B Better
  • channel 2 is most sensitive, real time estimate of primary to secondary leak
19
Q

What are the major actions for “Minimizing Release to the Environment”

A
  • AR filter THRU FILTER
  • AFA isolate affected steam line
  • SBCV 1007/8 to off
  • Isolate AS and CD cross-tie
  • DW to the CD service hdr
  • Isolate CD overboard
  • Demins in service
  • SGBD demins in service
20
Q

What action is required if RU-139/140 (steam line RU’s) alarm

A
  • Secure affected SGBD
21
Q

What is required if RU-141 (AR) alarms

A
  • Ensure AR filter shift to THRU FILTER
22
Q

What is required if RU-4/5 (SGBD) alarms

A
  • Secure affected SGBD
23
Q

What are the volume changes for:

Lpzr
Lvct
Temp

A
  • Lpzr 66 gal/%
  • Lvct 40 gal/%
  • Temp 123 gal/F
24
Q

How long does ERFDADS leak rate lag Actual

A

7.5 minutes

25
Q

Define

RCS Leakage

A

Any leakage from within the RCS barrier or from connected systems that are not able to be isolated

Leakage from connected systems that are able to be isolated is NOT RCS leakage

26
Q

Per LCO 3.4.14 RCS operational leakage, what is the allowed leakage (mode 1-4)

A
  • No pressure boundary
  • 1 gpm unidentified
  • 10 gpm identified
  • 150 gpd through 1 SG
27
Q

What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge

A

Cold Leg injection path >1525 psig

vlvs may not open with high DP

28
Q

What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge

A

Cold Leg injection path >1525 psig

vlvs may not open with high DP

29
Q

What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge

A

Cold Leg injection path >1525 psig

vlvs may not open with high DP

Public 2022 (46 decks)

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