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Systems by Topic > RPS > Flashcards

RPS Flashcards

1
Q

What is the Reactor Steam Dome High Pressure RPS setpoint (per TRM)?

A

1060psig

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2
Q

What is the basis for the Reactor Steam Dome High Pressure setpoint?

A

Prevents system rupture and counteracts the reactivity addition from the decrease in voids

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3
Q

What is the SDV RPS setpoint? (TRM)

A

104gal

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4
Q

What is the basis for the SDV level trip?

A

ensures adequate volume available for scram discharge

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5
Q

What is the high drywell pressure scram setpoint? (TRM)

A

1.7psig

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6
Q

What is the basis for the high drywell pressure scram setpoint?

A

indicates possible RCS breach-minimizes fuel damage and reduces energy to coolant and drywell during LOCA

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7
Q

What is the RPV level scram setpoint?

A

LL1 - 166”

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8
Q

What is the basis for the RPV level scram?

A

-maintains fuel integrity (<2200dF w/ ECCS during LOCA)

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9
Q

What is the RPS setpoint and logic for Turbine Stop Valves?

A

<90% openBAD CAD logic - need both TSVs in string to give trip for that channel

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10
Q

What is the basis for TSV/Turbine Trip scram?

A

Protects MCPR, anticipates increase in pressure and flux from the TSV closure-Scrams before neutron monitors or RPV pressure

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11
Q

What is the RPS setpoint and logic for Turbine Control Valves?

A

-600psig EHC (RETS header)1 out of 2 twiceA: 1 or 3B: 2 or 4

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12
Q

What is the basis for TCV scram?

A

Protects MCPR, anticipates increase in pressure and flux from the TSV closure-Scrams before neutron monitors or RPV pressure

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13
Q

What is the MSIV scram setpoint and logic?

A

-<90% openBAD CAD-closing 2 steam lines may cause scram-closing 3 steam lines will always cause scram

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14
Q

What is the basis for the MSIV scram?

A

Prevents reactivity spike from pressure transient

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15
Q

What is the setpoint and logic for SRM scram?

A

-Hi Hi 5x105 cps-Any SRM will cause scram without shorting links installed

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16
Q

What is the setpoint for IRM scram?

A

117%/125%

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17
Q

What is the basis for the IRM scram?

A

-protects against rod withdrawal errors-maintains enthalpy <170 cal/gm

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18
Q

What is the APRM high flux scram set point for each mode?

A

117.4% (RUN)15% (not in RUN)

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19
Q

What is the TLO simulated thermal power scram set point?

A

0.55W + 61.1%W = core flow

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20
Q

What is the SLO simulated thermal power scram set point?

A

0.55(W-20.5)+61.1%W = core flow

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21
Q

What is the basis for the APRM hi flux scram?

A

RUN - protects against overpressure transient and is assumed to terminate the CRDA and MSIV closure transient-Also limits potential consequences of transients in Mode 1 that could result in exceeding safety limitsStartup - limits power to less than 23%, secondary protection to IRM trip

22
Q

What is the logic for APRM/OPRM scrams?

A

Voters - a trip signal from at least 2 APRMs/OPRMs(INOP APRM = 1 vote)

23
Q

When is the RPV pressure trip bypassed?

A

Never

24
Q

When is the Turbine Trip scram bypassed?

A

Less than 26%CTP (117psig 1st stage turbine pressure) or with keylock switch

25
Q

When is the TCV scram bypassed?

A

Less than 26%CTP (117psig 1st stage turbine pressure) or with keylock switch

26
Q

When is the SDV level scram bypassed?

A

Mode switch in REFUEL or SHUTDOWN-manual switch

27
Q

When is the MSIV scram bypassed?

A

Mode switch NOT in RUN

28
Q

When is the high drywell pressure scram bypassed?

A

Never

29
Q

When is the RPV level scram bypassed?

A

never

30
Q

What is the minimum amount of time that must pass before a scram can be reset?

A

10 seconds

31
Q

How much time must pass once the mode switch is placed in shutdown before the scram can be reset?

A

2 seconds

32
Q

What is the RPS trip logic?

A

1 out of 2 taken twiceDe-energize to trip

33
Q

What is the normal power supply for RPS A?

A

E5(7) via MG set A and EPA breakers 1 and 2

34
Q

What is the normal power supply for RPS B?

A

E6(8) via MG set B and EPA breakers 3 and 4

35
Q

What is the Alternate normal power supply for RPS A?

A

E5(7) via EPA breakers 5 & 6

36
Q

What is the alternate normal power supply for RPS B?

A

E5(7) via EPA breakers 5 & 6

37
Q

What is the alternate alternate power supply for RPS A?

A

E6(8) via EPA breakers 5 & 6

38
Q

What is the alternate alternate power supply for RPS B?

A

E6(8) via EPA breakers 5 & 6

39
Q

SSPV chatter can be indicative of what in relation to RPS power supplies?

A

Low voltage

40
Q

What document requires Alternate Rod Insertion (ARI)?

A

10CFR50.62

41
Q

What causes the blue scram light to illuminate on the full core display?

A

Both the 126 and 127 scram valves not full closed

42
Q

How could approximately 1/4 of the control rods scram at a time?

A

Pull fuse to SSPV group

43
Q

Are SDV vents and drains normally open or closed?

A

Normally open (de-energize to close)

44
Q

What is the effect of a half scram on the SDV vents and drains?

A

Remain energized (remain open)

45
Q

How many backup scram valves are there and where are they located?

A

2Located on scram air header

46
Q

How many ARI valves are there and where are they located?

A

8 (4 pairs )1 each on North and South HCU banks1 on scram air header supply1 on SDV vents and drains air supply

47
Q

What are the initiation signals for ARI and what is the logic?

A

LL2 (105”) or RPV Pressure 1137.8psig

Must receive two of the same signal

(from RCR logic)

48
Q

What powers ARI valves?

A

11A(12A)Div 1 only!

**Both Div 1 and Div 2 pressure and level signals are required for an auto initiation of ARI. If Div 2 AC is lost, ARI will NOT auto initiate but can be manually initiated**

49
Q

What powers Backup scram valves?

A

Div 1: 3(4)ADiv II: 3(4)B

50
Q

How long after initiation ARI can ARI be reset?

A

25 seconds

51
Q

What are the effects of a loss or transfer of an RPS power supply?

A

CREV initiation1/2 scramSBGT startsHalf MSIV isolation signalRB HVAC isolatesHalf PCIS isolations (A-in B-out in general)Full CAM, PASS, 1/2 CACRPS A only - TIPs retract

Systems by Topic (14 decks)

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