RCS Flashcards
Why do we have to close CV-1009 when using aux spray?
protect aux spray line from LPI/HPI, no thermal sleeving
Code Safeties lift @
2500 psig
ERV opens @
ERV closes @
Also opens @ ___ when selected to LTOP
2450 PSIG
400 PSIG
high pressure alarm?
2255 PSIG
High pressure reactor trip setpoint?
2355 psig
what level do heaters interlock off?
55 inches
what pressure does spray valve open?
2205 psig
2080 psig when mfp trips >80% power
what is NOP?
2155 psig
ERV LTOP setpoint
400 psig
core flood valve alarm pressures and which direction
700 psig decreasing
750 psig increasing
Low-Low RCS pressure alarm
1640 psig
Low pressure reactor trip
1800 psig
Low pressure RCS alarm
2055 psig
how are the 3 OTSG heat transfer regions affected on an up power?
Nucleate boiling gets larger
film boiling region stay the same
superheat region becomes smaller
Where is tap for letdown?
‘A’ RCP suction
where is makeup tap off?
‘D’ RCP Discharge
where does spray tap off/come from?
Aux Spray?
‘C’ RCP discharge
LPI/HPI
Which loop is the PZR in?
‘A’ Loop
4 conditions for Nat Circ
hydraulic coupling
density change
elevational diff between heat sink and source
heat removal from ADVs or TBVs
1 degree change in RCS temp equals ____ inch change in PZR
5 inch
why is there a 1 gpm bypass around spray valve?
prevent thermal shock if/when spray is used.
how can we determine PZR pressure during transient?
its the same as RCS press.. duh
Where does decay heat removal tie into?
‘A’ Loop
instrumentation associated with RCS located on hot leg are: (3 of them)
flow, temp, pressure
What does the high pressure lift oil pump do?
supplies oil to kingsbury thrust bearing. makes it easier to start
Back stop lube oil pump purpose?
supplies oil to anti-rotation device and radial bearing.
List RCP Starting interlocks
- <22% power
- seal injection >3gpm
- motor ICW cooling >250gpm
- seal cooling >30 gpm
- A,C,D - upper oil level >-2.0 in……….B >-1.6in
- A,C,D - motor lower oil level >-1.5 in……..B >-1.2in
- A,C,D - lift pressure > 1750 psig……..B > 1000psig
- no reverse rotation, <12.7 gpm oil flow
- Tcold > 465F to start 4th pump
give numbers for each pressure seal breakdown
2155# -> 1st seal -> ~1500# -> 2nd seal -> ~750# -> 3rd seal -> atm
short description of seal injection with flows.
8-10 gpm seal injection, aux impeller moves some thru ICW cooler, 1.5 gpm goes thru each seal as controlled leakoff. this happens for each rcp
if bleedoff flow dropped to 0 what does this indicate?
3rd stage seal failed
why is seal bleedoff diverted to quench tank on RB isolation?
maintain seal staging
3 minute blow thru ERV results in quench tank pressure rise of
<= 1 psig
RCS press, temp, and flow DNB Limits Tech spec
LCO: RCS DNB within CLR Limits
Mode 1
No 1 hour
RCS Min Temp for Criticality Tech Spec
LCO: rcs tave >=525F
Modes 1 & 2
Actions: not within limit, be in mode 3, 30 min
RCS press and temp limits tech spec
LCO: RCS press, temp, heatup/cooldown rates within limits
All modes
Actions: not within limits, be in mode 3, 30 minutes
RCS Loops - Modes 1 & 2 Tech Specs
LCO: 2 rcs loops in operation wiht 4 rcps operating OR
3 rcps operating and thermal power restricted by COLR
Modes 1 & 2
No 1 hour
RCS loops Mode 3 tech spec
LCO: 2 rcs loops operable and 1 rcs loop in operation
Mode 3
Actions: 2 loops inop or req’d loop not operable, suspend intro to rcs ops AND initiate action to restore 1 loop to operable, Immediately
RCS loop mode 4 tech spec
LCO: 2 loops of any combo (rcs loops, DH loops) operable and 1 in operation
Mode 4
Actions: 1 req’d loop inop, initiate to restore, immediately
2 req’d loops inop OR req’d loop not operating, suspend intro ops AND initiate to restore to operable and operation, immediately
RCS loop Mode 5 loops filled tech spec
LCO: 1 DHR loop operable and in operation and either 1 additional DHR loop operable OR secondary side of SG >=20in
Mode 5 loops filled
Actions: 1 DHR loop inop OR 1+ SG water level not in limits OR no req’d DHR loop operable or in operation, All immediately
RCS loops - mode 5 loops not filled
LCO: 2 DHR loops operable and 1 in operation
Mode 5 loops not filled
Actions: 1 DHR inop OR no dhr loop operable or i/s, restore, immediately
Pressurizer tech spec
LCO: PZR operable with <=320 inch water level
Min of 126 kw ES bus powered heaters operable
modes 1, 2, 3…….4 RCS >259F
Actions: water level not within limits, restore, 1 hour
PZR safety valve tech spec
LCO: 2 PZR safety valves oeprable
Modes 1, 2, 3…..4 RCS > 259F
Actions: 1 inop in mode 1 or 2, restore to operbale, 15 min
PZR safety valve tech spec
2 pzr safety valves operable
modes 1, 2
mode 3….mode 4 rcs temp >259F only 1 needed operable
Actions: 1 pzr safety valve inop mode 1 or 2, restore to operable, 15 min
LTOP Tech spec
LCO: LTOP operable with HPI deactivated and CFT isolated
modes: 4 w/ RCS <= 259F,,, Mode 5,,,,,Mode 6 with Rx vessel head on
Actions: level not met, restore, 1 hr
ERV inop, restore to operable, 1 hr
rcs specific activity tech spec
LCO: does equiv I-131 and dose equiv XE-133 within limits
Modes 1, 2, 3, & 4
No actions 1 hr
RCS leakage tech spec
LCO: leakage limited to no pressure boundary leakage, 1 gpm unidentified, 10 gpm identified, 150 gal/day pri to sec thru 1 sg
Modes 1, 2, 3, & 4
no 1 hr actions
RCS Pressure isolation valve leakage tech spec
LCO: leakage from each PIV within limits
1, 2, & 3…..4 except valves in DHR flow path while in operation
no 1 hr action
RCS leakage detection tech spec
LCO: following operable: 1 RB sump monitor and 1 RB atm radioactivity monitor
Modes 1, 2, 3, 4
no 1 hr actions
SG tube tech spec
LCO: tube integrity maintained AND all tubes satisfying plugging criteria
1, 2, 3, 4
no 1 hour action
