Immediate Operator Actions - .5

Question 1

Bearing 1–10 Vibration ≥ 12 mils
@ 1800 RPM
Bearing 11–12 Vibration ≥ 8 mils
@ 1800 RPM

Answer 1

IF Reactor Power is ≥18% **
THEN LOCK the Mode Switch in Shutdown.

IMMEDIATELY TRIP the Main Turbine.

Question 2

In service EHC Pump tripped.

Answer 2

START the standby EHC Pump.

Question 3

Degraded Main Condenser Vacuum

Answer 3

REDUCE Reactor Power to maintain
MAIN CONDENSER A(B,C) VACUUM LO
Overhead Alarm Clear

Question 4

Trip of the Inservice Service Air
Compressor

Answer 4

PLACE the out of service Service Air
Compressor in service. (AB.ZZ-0001)

Question 5

Primary Containment Isolation
Valve FAILS to automatically
ISOLATE following a valid
isolation signal.

Answer 5

PERFORM EITHER of the following:
● CLOSE a redundant isolation valve
● CLOSE the valve manually.

Question 6

Irradiated fuel damage

Answer 6

SUSPEND the handling of Irradiated
Fuel/Components

Question 7

Significant loss of Fuel Pool
inventory.

Answer 7

PERFORM the following:
EVACUATE the Refuel Floor.
RETURN irradiated fuel assembly to the Vessel
or Pool.
LOWER any bundle in the Fuel Prep Machine
to the Full Down Position.

Question 8

Multiple Control Rods are
Drifting Simultaneously.

Answer 8

LOCK the Mode Switch in SHUTDOWN.

(Drifting Does NOT include
Scrammed or Scramming Rods)

Question 9

ANY Neutron Monitor
UPSCALE/INOP.
(SRM, IRM, LPRM or APRM)

Answer 9

TERMINATE all Fuel Movement
AND Control Rod withdrawal.

Question 10

Reactor Power is Rising.

Answer 10

REDUCE Reactor Power to Pre-Transient
value.

Question 11

Dual Reactor Recirc Pump
runaway.

Answer 11

LOCK the Mode Switch in Shutdown.

Question 12

Single Reactor Recirc Pump
runaway.

Answer 12

PRESS the MANUAL SPEED HOLD
Pushbutton for the affected Recirc Pump
Controller.

REDUCE the NON-affected Reactor Recirc
Pump Speed to Reduce Power to
Pre-Transient value

Question 13

Automatic Level control system
malfunction.

Answer 13

NOTE 1

As required,
MAINTAIN Reactor water level Manually
between LEVEL 4 and LEVEL 7.

REDUCE Reactor Power, as necessary, to
Maintain between LEVEL 4 and LEVEL 7.

**In manual, an operator, with no other responsibilities, should be assigned to maintain water level while the reactor is critical. **

Question 14

RPV Pressure Rising

Answer 14

REDUCE Reactor Power to maintain
RPV PRESSURE HI Overhead Alarm Clear

Question 15

Uncontrolled Lowering of RPV
Pressure
AND the Reactor is not Shutdown.

Answer 15

LOCK the Mode Switch in Shutdown.