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RPS Flashcards

(51 cards)

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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?

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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?

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A

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

23
Q

When is the RPV pressure trip bypassed?

24
Q

When is the Turbine Trip scram bypassed?

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A

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

25
When is the TCV scram bypassed?
Less than 26%CTP (117psig 1st stage turbine pressure) or with keylock switch
26
When is the SDV level scram bypassed?
Mode switch in REFUEL or SHUTDOWN-manual switch
27
When is the MSIV scram bypassed?
Mode switch NOT in RUN
28
When is the high drywell pressure scram bypassed?
Never
29
When is the RPV level scram bypassed?
never
30
What is the minimum amount of time that must pass before a scram can be reset?
10 seconds
31
How much time must pass once the mode switch is placed in shutdown before the scram can be reset?
2 seconds
32
What is the RPS trip logic?
1 out of 2 taken twiceDe-energize to trip
33
What is the normal power supply for RPS A?
E5(7) via MG set A and EPA breakers 1 and 2
34
What is the normal power supply for RPS B?
E6(8) via MG set B and EPA breakers 3 and 4
35
What is the Alternate normal power supply for RPS A?
E5(7) via EPA breakers 5 & 6
36
What is the alternate normal power supply for RPS B?
E5(7) via EPA breakers 5 & 6
37
What is the alternate alternate power supply for RPS A?
E6(8) via EPA breakers 5 & 6
38
What is the alternate alternate power supply for RPS B?
E6(8) via EPA breakers 5 & 6
39
SSPV chatter can be indicative of what in relation to RPS power supplies?
Low voltage
40
What document requires Alternate Rod Insertion (ARI)?
10CFR50.62
41
What causes the blue scram light to illuminate on the full core display?
Both the 126 and 127 scram valves not full closed
42
How could approximately 1/4 of the control rods scram at a time?
Pull fuse to SSPV group
43
Are SDV vents and drains normally open or closed?
Normally open (de-energize to close)
44
What is the effect of a half scram on the SDV vents and drains?
Remain energized (remain open)
45
How many backup scram valves are there and where are they located?
2Located on scram air header
46
How many ARI valves are there and where are they located?
8 (4 pairs )1 each on North and South HCU banks1 on scram air header supply1 on SDV vents and drains air supply
47
What are the initiation signals for ARI and what is the logic?
LL2 (105") or RPV Pressure 1137.8psig Must receive two of the same signal (from RCR logic)
48
What powers ARI valves?
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
What powers Backup scram valves?
Div 1: 3(4)ADiv II: 3(4)B
50
How long after initiation ARI can ARI be reset?
25 seconds
51
What are the effects of a loss or transfer of an RPS power supply?
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

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