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when EWA is cross tied to NC, why does a SIAS disconnect the two systems
ensures SDHX has adequate flow
what is the minimum flow to run CS indefinitely? what is the 1 hour miniflow GPM
3200 GPM for indefinite run, 150 GPM for 1 hour through the mini flow
when the CW crosstie is closed and starting the second CW pump, what is discharge valve logic ?
the seconds pumps discharge valve goes 44% open and holds for 3 minutes, then opens to 100% open. following this the 1st pumps discharge valve then opens to 100% open
what is lost on a loss of PKA-M41?
lose letdown, 2 ADVs, and only one RTSG breaker opens
a FBEVAS actuates, a short time later a SIAS actuates, what is the status of the FB exhaust HVAC?
swaps essential exhaust to the suction of the 100ft and below of the aux building
where are RAD monitors and their pumps powered from?
PN for the monitors and PH for the pumps
what is the status the RCP HP seal cooler valves normally?
normally open and de-energized
the RX is subcritical, TCOLD is 565F, PZR is 2250 PSIA, an inadvertent dilution occurs, what is going to happen with no operator action?
results in a positive startup rate with no rod motion, this then causes a RX trip on HI log power
how does QSPDS interface with PPS?
PPS A and B have additional inputs to QSPDS not on PPS C and D
during a LBLOCA the following conditions are found
CTMT pressure 22 PSIG and raising
SG1 LVL 22% WR and raising and 430 PSIA
SG 2 LVL 22% WR and lowering and 345 PSIA
what ESFAS signals are present
SIAS, CIAS, MSIS, AFAS 1+2
if the PPCS master fails to 0, what affect will it have on SBCS?
SBCS will modulate open at a lower steam pressure
the SG is at 1100 PSIA, the MFP discharge pressure is 1085 PSIA, with no operator actions what will happen?
Rx trip on low SG water level
if pressure control system is selected to X, and Y fails high, what will happen?
no auto actions will occur, but you will get deviation alarms
PLCS is selected to X in auto, a loss of NNN-D11 occurs, what will happen to letdown?
letdown isolates due to a 0 output failure.
U1 has tripped, the RDT level and pressure is rising, safety valves are at 9%, what will happen to PZR level
PZR level will initially lower and then level will rise when saturation temp is reached.
with steam flow constant and ARO with CEDMCS is auto sequential while reducing load, an operator then opens 1006, what happens to the CEAs?
CEAS will start stepping in
during an approach to criticality what actions are taken on the main turbine
stop main turbine startup and warmup during approach to criticality
what is the concern with operating the turbine with load below 5%?
operation of the turbine with load below % causes erosion of late stage buckets
a leak in the charging system occurs and renders the normal injection flow path inoperable. if the HPSI B long term recirc is not available, where will CH discharge be aligned to?
A HPSI cold leg injection
what is required on a large NC leak on combined discharge to the chillers?
Trip the Rx, secure RCPs, and isolate seal bleedoff
what alternative action can be taken to cool the RCP thrust bearing temps?
you can start the lift oil pump to cool the RCP thrust bearing temps
what actions are taken when 1700 PSID is observed across 1 RCP seal?
commence a shutdown (NOT A RX TRIP)
what happens to HP seal cooler inlet temp when seal injection is isolated, what is expected to happen to the other seals?
HP seal cooler inlet temp will rise to 200-220 F when seal injection is isolated, all other seal temps are expected to remain the same
seal pressures read as follows
2250
1200
80
bleed off flow is 4.5 GPM
where is the seal failure located
located on seal 3
if CHB515 is closed due to invalid temp interlock, what actions can be taken to open the valve?
can be opened by I and C putting a jumper in
what happens to MSIV and FWIVs on a loss of IA with no N2 backup?
fails as is with fast closure available?
the main turbine operating at 375 MW and the SBCS COND INTLK is in, what actions should be taken
trip the RX and leave SBCS in auto
the main turbine is operating at 270 MW with vacuum as follows
A. 4.2
B. 4.5
C. 4.8
what actions need to be taken based on these parameters?
must reduce to less than 4 inches within 50 minutes
what must be performed to clear a turbine setback?
load limit pot must be turned down to until limiting light is on to clear turbine setback
what actions are taken on a RPCB LOFP if load is greater than 890 MW?
manually lower the pot to 65% power
what actions are taken following a MFP trip, what actions are take if a CEA slips or RPCB fails
trip the RX
what actions are taken if a CEA is dropped and subsequently another slips greater than 9.9 inches?
trip the RX
what is required if COLSS is OOS at 100% and CEA slips to 50 in withdrawn?
declare DNBR LCO not met per conditon B
what actions are taken if a 12 finger CEA slips to 10 inches?
monitor DNBR and LPD in unaffected quadrants
while operating at 50% power unit 1 experiences a LOOP, following this 1 A TCOLD fails hi? what will happen with no operator actions and what actions should be take to prevent this
DFWCS will feed max feed in RTO. this is prevented by selecting loop 2 to prevent max feed
Unit 1 experiences and inadvertent CSAS what actions are taken prior to restoring IA to CTMT
take 516 and 515 to close to prevent inadvertent opening when restoring IA
how is CS pump started following an inadvertent CSAS with a SIAS occurring after the CS pump is stopped
take the hand switch to start twice
following a Rx trip the following conditions are present
SG1 880psia,
SG2 500psia,
SG1 lvl 68%WR,
SG2 lvl 0%WR,
PZR lvl 28% and lowering,
Ctmt press 2.8psig and 210dF
what actions should be performed?
use normal values in SPTA and Harsh values in ORP
if a safety function is not met for unknown reasons in ORP and SFSC trending towards normal what is required
exit the ORP and enter FR due to loss reason unknown
U1 experiences a RX trip, Turbine trip, and PPB lockout, what pump will be used to feed the SG?
feed with AFN
U1 experiences a reactor trip, the EOP is entered, PZR pressure is 2210 and lowering. is safety function met?
no, pressure safety function not met due to trend
U1 RCS pressure drops with a subsequent undervoltage on the grid? what is expected to happen on the grid as a result?
WRF breakers trip, this is to prevent double sequencing of both U1 class busses
SPTAS are complete, the following is observed PZR pressure 1810psia and lowering, subcooling 20dF lowering, ctmt temp 145dF rising, ctmt pressure 5psig rising, 4 RCPs running.
what actions are required
Trip all 4 RCPs
If CTMT is flooded what effect does this have on CTMT cooling water?
cannot restore CTMT cooling water due to MOVs being submerged
what is the minimum CS pump flow to meet safety function during a LBLOCA
CS flow minimum of 4350 GPM
how is letdown effected from an RCS leak into LDHX?
results in back pressure control valves closing to raise backpressure
LDHX becomes hot and isolates letdown
who can perform contaminated management implementation?
any SRO
who ensures that locked valve control is performed correctly
CRS/SM
what is required on a human error resulting in a TSCR?
a CR must be written
what is the purpose of the LCO for RWT level?
basis ensures sufficient volume in CTMT sump for a RAS
if COLSS is out of service and LHR is not acceptable, what is required?
determine LHR trend every 15 minutes
if RTSG A breaker wont open what is required?
open A and C in 1 hour
what is the assumed small break loca single failure?
assumed small break loca with a failed DG
an ALERT is declared, who will direct performance of the standard appendices and who will direct actions to support maintenance
control room directs standard appendices
OSC directs support of maintenance
if operating at 100% with a loss of NAN-S02, what will happen to XENON
will increase due to less burnout
what affect will lower RCS pressure and lower grid frequency have on DNBR margin?
will result in lower DNBR
why is total stress on the inner wall during cooldown greater than on a heatup
because both stresses on the inner wall are tensile during a cooldown
how is planar radial peaking factor in CPCs calculated?
CPCs use CEA positions from RSPTs and calculated impact of misalignment is determined by look up tables
if COLSS is out of service and LHR is not in limits per LCO 3.2.1 what is required?
determine the LHR trend every 15 minutes
when are CPC trips placed in service?
CPC trips are placed in service when power reaches 10E-4% power
U2 experiences a Rx trip, If RPCB fails or CEA reg group 3 drops to the bottom of the core with the rest of reg group 3 at 120’, what would be required to be performed?
a manual reactor trip would be required to be performed
at 100% with COLSS out of service and group 5 CEA slips to 150”, what is required?
enter LCO 3.2.4 DNBR is not met and enter condition B
if a LOCA occurred 2.5 hours ago, what should be done?
place HPSI on long term injection to the hot leg
U1 is doing a startup, Rx is critical below the POAH. if a .3 DPM startup rate is established, and no further action is taken, what will happen to RX power?
power will rise and stabilize above the POAH