Card Set Information
PPC advanced systems
Met tower trailer power supply
Switchyard panel P-52
Methods for obtaining Meteorological Data?
Emergency preparedness computer
Weather Services International through the emergency preparedness computer
Call Grand Rapids National Weather Service
recieves data associated with control rod drive system
monitors and controls the control rod drives
generates control rod sequencing
generates Pre-Power Dependent insertion and Power Dependent insertion limits (PPDIL & PDIL)
PIP node powered from Y-20
has Watchdog timer
What are the 4 G2VX nodes?
Primary Indication Panel (PIP)
Secondary Position Indication (SPI)
Cooling tower control system (CTCS)
Sequence of Events (SOE)
When would you use the manual bypass switches for the PPC power supply?
manual bypass switch is used when it is necessary to isolate the inverter cabinet for repairs or if a charger is lost to prevent cycling of the battery
switches are located in J-1041 and J-1043 in cableway in D bus room
Purpose of the PPC?
provides control, monitoring, and alarms during normal & emergency plant conditions
provides normal output for the incores as well as the incore alarm function
provides PIP & SPI
provides control rod group sequence control, and the control rod out of sequence and power dependent insertion limit alarm functions
operators interface for performing heat balance calculations and control rod drop timing tests, & monitoring plant parameters
interface for starting/stopping the Emergency Response Data System link to the NRC
recieves and passes on to the Host cooling tower system data
has additional software for monitoring/control of the CT fans
has watchdog timer
powered from Y-01
Effects of loss of Y-40 on the PPC?
SPI Node lost
-lose SPI rod position
-lose incores & non qualified CETs
monitor LHR using excores or manually read incores
RO-19 "Control Rod Position Verification" can't be performed
PPC heat balance is invalid, must manually calculate
When are we required to establish the Emergency Response Data System (ERDS) link to the NRC?
Alert or above
Power supplies for the PPC UPS?
MCC-3/4 power battery chargers D206/D207
1 battery charger powers D-205 bus & float charge to battery D-204
D-205 bus powers Y-03/Y-04 through inverters Y210/Y220
backup power to Y-03/Y-02 PPC power supplies from MCC-3/4 through a static switch
EK-0918 "PIP trouble"
brought in by the watchdog timer
PPC screen 900 "PPC Network system status"
-red is down
-magenta is status unknown
Loss of preferred AC bus Y-10 effects on left channel indications for the PPC?
Left channel PPC indications from the cutler hammer interface are lost
right channel is still available
Effects of loss of Y-20 on the PPC?
PIP node lost
-lose PIP rod indication on the PPC
-lose auto control rod sequencing
-lose PPDIL & PDIL overhead annunciators
C-12 rod matrix will look different when rods are on the bottom
SPI supplies PDIL & PPDIL, rod position
cannot do "rod position verification" RO-19
lose right channel PPC indications from cutler hammer
What is the Cutler Hammer interface?
recieves data from digital/analog inputs monitoring plant systems and passes it to the host computer
fail over host will not process inputs from the Cutler-Hammer
powered from the UPS via Y-220
How will the PPC be affected if the Host computer is down?
the fail over host computer is configured to automatically take over the tasks of the host VAX
lose cutler hammer interface
How does static switch Y-230/Y-260 operate?
when voltage drops to 105 VDC static switches Y-230/Y-260 auto transfer to MCC-3/4
backup power supplied by MCC-3/4 through SOLA transformers
scans analog points 10 times/sec to aid in trainsient response after certain triggering events
-digital points are scanned at a higher rate (100 times/sec)
Analalog points scanned
-A/B S/G level and feed flow
Triggering events-when triggered stores 30 minutes of data
-Neutron flux high
-PZR pressure high
-A/B S/G low press/level
-Loss of load
-Rx PWR high rate of change
-PCS low flow
Powered from Y-210
recieves rod positions, incores, CET and various other analog data inputs and passes these to the HOST
most data scanned once per second
select group of data scanned more often for transient analysis
-S/G A/B pressure
-HP turbine inlet pressure
-S/G A/B steam flow
has watchdog timer
powered from Y-40
Power supply for PPC fail over host computer?
L-61 in the CFMS trailer
-L-21 from L-02 from MCC-6 from E bus via LCC-14
What must you do if you recieve EK-3327 "SOE node trouble"?
must perform manual calculation of heat balance
Where are the 2 monitoring sensors for the MET tower located? What do they provide?
Purpose of the Meteorological Monitoring System?
collects and displays current atmospheric condition data for the use in calculating off-site radiation dose rates during accident conditions
produces a history of climactic conditions for environmental monitoring purposes
What 2 systems does the MET tower interface with?
PPC page 351
backup is emergency preparedness computer
How do urgent alarms impact the PPC?
results in a beeping noise from the NCO-RX workstation
3 beeps of 200 ms each followed by a 2 second pause, then repeats
auto switches to NCO-turbine if NCO-RX is OOS
Given a loss/malfunction of MET monitoring system what is the effect on a WGDT batch?
as long as wind speed, direction, and stability class can be obtained you can perform the batch
EK-3337 "Cooling tower system trouble"
caused by the watchdog timer
use PPC page 900 "PPC network system status" to validate
may lose CT basin level and CT fan status