Retainment Overrides

Question 1

Reactor power is > 24% AND Steady-State FLFWTR > 1.00 *

Answer 1

INITIATE Corrective Action within
15 minutes.
RESTORE Feedwater temperature to the
analyzed region within 2 hours
OR REDUCE RTP to less than 24% of
RATED THERMAL POWER.
WITHIN the next 4 hours

Question 2

Failure of Main Turbine to runback on
a Loss of Stator Water Cooling for
more than 15 seconds.

Answer 2

REDUCE Recirc Pump speed to MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

Question 3

Loss of Stator Cooling
for > 2 min.
AND Reactor Power > 18% **

Answer 3

REDUCE Recirc. Pump speed to MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

II.C TRIP the Main Turbine.

Question 4

Bearing 1–10 Vibration ≥ 11 mils @
1800 RPM *
Bearing 11–12 Vibration ≥ 7 mils @
1800 RPM *

Answer 4

IF Reactor Power is ≥18%**
THEN PERFORM the following:

REDUCE Recirc. Pump speed to MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

IMMEDIATELY TRIP the Main Turbine.

Question 5

EHC Pressure ≤1200 psig
AND Lowering (multiple indications)
AND EHC is required to maintain the
Main Condenser as a heat sink.

Answer 5

IF the Reactor is not shutdown,
THEN LOCK the Mode Switch in
Shutdown.

Question 6

Steam Tunnel Cooler Inlet
Temperature (A2541) OR any
TWO channels of Main Steam
Tunnel Temperature NUMAC
readings are rising AND
expected to exceed 155°F.

Answer 6

REDUCE Recirc. Pump speed to
MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

Question 7

Steam Tunnel Temperature
>145ºF at CRIDS point A2541

Answer 7

REDUCE Recirc. Pump speed to
MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

Question 8

Any unanticipated Main Steam
Tunnel Damper closure as a
result of increased room
temperature with indication of a
break from a High Energy
system

Answer 8

REDUCE Recirc. Pump speed to
MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

Question 9

Reactor Power reduction cannot restore
and maintain condenser pressure < 6.5”
HgA

Answer 9

REDUCE Recirc. Pump speed to MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

Question 10

Turbine Load <30%,
AND
Condenser Pressure > 5.0” HgA.

Answer 10

IF Reactor Power is ≥18% *
THEN PERFORM the following:

REDUCE Recirc. Pump speed to MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

TRIP the Main Turbine. [CD-896E]

Question 11

Total Loss of Circ Water
AND the Main Condenser is being used
as a Heat Sink.

Answer 11

IF the Reactor is not shutdown,
THEN:

REDUCE Recirc. Pump speed to MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

CLOSE all MSIV’s
AND Steam Line Drains

Question 12

1-KA-HV-7595 is CLOSED
AND
Instrument Air Header Pressure
≤ 70 psig. (PI-7603A(B) or A3016)
AND
Instrument Air Header Pressure
continues to Lowe

Answer 12

IF the Reactor is not shutdown,
THEN:

REDUCE Recirc. Pump speed to
MINIMUM

LOCK the Mode Switch in
SHUTDOWN.

Question 13

Instrument Gas Pressure ≤ 70 psig

Answer 13

CLOSE Instrument Air Shutoff Valve
KLHV-5125
IF Instrument Air was cross-tied in
Operator Action Step A.4.a.

Question 14

Instrument Gas Pressure ≤ 50 psig

Answer 14

REDUCE Recirc. Pump Speed to
MINIMUM.

LOCK the Mode Switch in SHUTDOWN.

PLACE RCIC and/or HPCI in service to
control Reactor Pressure and Level.

CLOSE the Inboard MSIVs.

CLOSE the following:
● HV-5124A
● HV-5124B

Question 15

Drywell Pressure is ≥ 1.5 psig
and rising.

Answer 15

REDUCE Recirc. Pump Speed to
MINIMUM.

LOCK the Mode Switch in Shutdown.

Question 16

Drywell Pressure is ≥ 1.68 psig.

Answer 16

TRIP the Recirc Pumps
within 5 minutes.

Question 17

Complete and sustained loss of TACS.

Answer 17

REDUCE Reactor Recirculation
pumps to minimum speed.

LOCK the Reactor Mode Switch in
SHUTDOWN.

PERFORM Condition ‘C’ actions.

Question 18

Total Loss of RACS has
occurred (multiple indications)
AND
CANNOT be restored.

Answer 18

REDUCE Recirc. Pump Speed to MINIMUM.

LOCK the Mode Switch in Shutdown.

TRIP both Reactor Recirculation Pumps.

TRIP both CRD Pumps.

TRIP both RWCU Pumps.

Question 19

EDG Auto Start
AND Offsite Power is
available.

Answer 19

SECURE EDG’s EXCEPT EDG’s supplying power
to ECCS Pumps that are ensuring Adequate Core
Cooling by pressing BOTH Emergency Stop
Pushbuttons for the respective EDG’s.

Question 20

Multiple systems are indicating signs of
spurious activation AND the CRS
CANNOT maintain positive control of
the plant from the control room.

Answer 20

ENTER HC.OP-AB.HVAC-0002,
Control Room Environment.

Question 21

Smoke OR Toxic Gases are
ENTERING the Control Room from an
Outside source.

Answer 21

PRESS the ISOLATE PB for the
I/S Control Room Ventilation Train.

PRESS the RECIRC PB for the I/S
CREF Unit

Question 22

Reactor Pressure < 900 psig
AND
Charging Water Header
Pressure < 940 psig
AND
ANY WITHDRAWN Control Rod Scram
Accumulator INOPERABLE.

Answer 22

LOCK Mode Switch in SHUTDOWN.

Question 23

Control rod is drifting IN OR OUT

Answer 23

BYPASS the RWM (as necessary)

FULLY INSERT the drifting control
rod.

ENTER Condition C

Question 24

Level in SDV  85%.

Answer 24

REDUCE Reactor Recirculation pumps
to minimum speed.

LOCK the Reactor Mode Switch in
SHUTDOWN.

Question 25

Affected Recirc Pump seal cavity
temperature greater than 220° F*

Answer 25

REDUCE the affected Recirc pump
speed to minimum,
TRIP the affected Recirc pump and
enter Condition A

Question 26

Reactor Water Level ≤ 15” OR ≥ 50”

Answer 26

LOCK the Mode Switch in
Shutdown.

Question 27

Primary Condensate Pump Suction
OR Discharge Valve validated * to be closing.

Answer 27

TRIP respective Primary
Condensate Pump

Question 28

Secondary Condensate Pump Suction Valve
validated * to be closing.

Answer 28

TRIP respective Secondary
Condensate Pump

Question 29

Reactor Pressure ≥ 1030 psig

Answer 29

LOCK the Mode Switch in SHUTDOWN.

Question 30

Uncontrolled Depressurization
with Reactor Shutdown
AND
Reactor Pressure lowers to
550 psig

Answer 30

CLOSE the following to control
Cooldown Rate: [T/S 3.4.6.1.b]
* MSIV’s
* HV-F016
* HV-F019

Question 31

Offgas Pretreatment Radiation Level
≥ 10 R/hr
(150,000 µCi/sec by grab sample).

Answer 31

REDUCE Reactor Power as necessary
to maintain Offgas Pretreatment
Radiation Level < 10 R/hr
(150,000 µCi/sec by grab sample).

Question 32

VALID Main Steam Line HI HI
Radiation condition exists
(3X Normal).

Answer 32

LOCK the Reactor Mode Switch in
SHUTDOWN.

CLOSE the MSIVs AND Main Steam
line drains F016/F019.