Section 3.4 RCS Flashcards
- LCO 3.4.1.3 RCS - Hot Shutdown*
- *
What is required to restart a RCP with any RCS cold leg temperature ≤ 350 ˚F?
RCS/SG ∆T < 50 ˚F
- LCO 3.4.9.3 COMS*
- *
What are your ≤ 1 hr action(s) if ≥ 1 ECCS accumulators are not isolated while in MODES 4-5 or MODE 6 with the Rx Vessel Head on?
- LCO 3.4.9.3 COMS*
- Action A*
- *
- Isolate ECCS Accumulators [1 hr]
- LCO 3.4.1.4.2 RCS Cold Shutdown - Loops Not Filled*
- *
What are your ≤ 1 hr action(s) if 2 RHR trains are inoperable while in MODE 5 w/ RCS loops not filled?
- LCO 3.4.1.4.2 RCS Cold Shutdown - Loops Not Filled*
- Action A*
- *
Initiate action to return required RHR trains to OPERABLE status [Immediately]
Note:
2 RHR trains may be inoperable for testing for 2 hrs provided remaining RHR train is OPERABLE
- LCO 3.4.4 PZR Relief Valves*
- *
What are your ≤ 1 hr action(s) if both PORV block valves are inoperable while in MODES 1-3?
- LCO 3.4.4 PZR Relief Valves*
- Action E*
- *
- Restore PORV blocks to OPERABLE [1 hr]
OR
- Shut associated PORVs [1 hr]
AND
- Restore 1 PORV block to OPERABLE [Following 1 hr]
OR
- Apply CRMP [Following 1 hr]
OR
- Be in MODE 3 [6 hrs]
AND
- Be in MODE 4 [Following 6 hrs]
- LCO 3.4.8 Specific Activity*
- *
Why are only nuclides with greater than 15 minute half-lives considered in E-bar?
Difficult to identify short-lived radio-nuclides
Once FPP released during DBA, it takes 30 mins to get to site boundary
- LCO 3.4.1.3 RCS Hot Shutdown*
- *
What are your ≤ 1 hr action(s) if all RCS/RHR loops are inoperable in MODE 4?
- LCO 3.4.1.3 RCS Hot Shutdown*
- Action B*
- *
- Initiate action to restore required RCS/RHR loops [Immediately]
AND
- Suspend operations that would dilute RCS < SDM [Immediately]
- *
Note:
All RCS/RHR loops may be secured for 1 hr provided:
- Do not dilute RCS < SDM
- RCS Temperature maintained ≥ 10 ˚F below saturation temperature
- LCO 3.4.8 Specific Activity*
- *
When is LCO 3.4.8 Specific Activity Applicable?
MODES 1-5
- ≤ 1 µCi/g Dose equivalent I-131
- ≤ 100/E µCi/g of gross activity
- LCO 3.4.1.1 RCS S/U and Power Operation *
- *
When is LCO 3.4.1.1 RCS S/U and Power Operation Applicable?
MODES 1-2
Bases:
DNBR concerns
- LCO 3.4.1.4.1 RCS Cold S/D - Loops Filled*
- *
What are your ≤ 1 hr action(s) if 2 RHR trains are inoperable AND ≥ 3 SGs have a NR Level of < 10% while in MODE 5 w/ RCS loops filled?
- LCO 3.4.1.4.1 RCS Cold S/D - Loops Filled*
- Action A*
- *
- Initiate action to restore required RHR trains [Immediately]
OR
- Initiate action to restore required SG NR Water levels [Immediately]
- LCO 3.4.9.1 RCS Pressure/Temperature Limits*
- *
What are your ≤ 1 hr action(s) if any RCS heatup rate, cooldown rate, or hydrostatic rate of change is violated?
- LCO 3.4.9.1 RCS Pressure/Temperature Limits*
- Action A*
- *
- Restore Temperature/Pressure to within limits [30 mins]
AND
- Perform engineering evaluation and determine if RCS integrity is still acceptable [6 hrs]
OR
- Be in MODE 3 [6 hrs]
AND
- Reduce to 200 ˚F and 500 psig [Following 30 hrs]
- LCO 3.4.4 PZR Relief Valves*
- *
When is LCO 3.4.4 PZR Relief Valves Applicable?
MODES 1-3
Manual operation is required for safety function.
- LCO 3.4.5 S/G tube Integrity*
- *
When is LCO 3.4.5 S/G tube Integrity Applicable?
MODES 1-4
- LCO 3.4.2.2 PZR Safeties*
- *
What are your ≤ 1 hr action(s) if one PZR safety valve is inoperable while in MODES 1-3?
- LCO 3.4.2.2 PZR Safeties*
- Action A*
- *
Restore PZR Safety to OPERABLE [1 hr]
OR
Be in MODE 3 [6 hrs]
AND
Be in MODE 4 [Following 6 hrs]
- LCO 3.4.4 PZR Relief Valves*
- *
What are your ≤ 1 hr action(s) if ≥ 1 PZR PORV is inoperable due to seat leakage in MODES 1-3?
- LCO 3.4.4 PZR Relief Valves*
- Action A*
- *
- Restore PORV to OPERABLE [1 hr]
OR
- Close PORV Block valve and maintain power on valve [1 hr]
OR
- Be in MODE 3 [6 hrs]
AND
- Be in MODE 4 [Following 6 hrs]
- LCO 3.4.1.2 RCS Hot Standby*
- *
What are your ≤ 1 hr action(s) if all Rx Coolant loops are inoperable while in MODE 3?
- LCO 3.4.1.2 RCS Hot Standby*
- Action C*
- *
- Initiate action to restore required RCS loops [Immediately]
AND
- Suspend operations that would dilute RCS < SDM [Immediately]
- *
Note:
All RCS loops may be secured for 1 hr provided:
- Do not dilute RCS < SDM
- RCS Temperature maintained ≥ 10 ˚F below saturation temperature
- LCO 3.4.1.4.1 RCS Cold S/D - Loops Filled*
- *
What RCS/RHR loops should be OPERABLE while in MODE 5 w/ RCS loops filled?
1 RHR train w/ 125 gpm flowrate
AND
1 additional RHR Train
OR
2 SGs with NR Level > 10%
2 RHR trains may be inoperable for testing for 2 hrs provided remaining RHR train is OPERABLE
All RHR loops may be secured for 1 hr provided:
- Do not dilute RCS < SDM
- RCS Temperature maintained ≥ 10 ˚F below saturation temperature
- LCO 3.4.9.1 RCS Pressure/Temperature Limits*
- *
When is LCO 3.4.9.1 RCS Pressure/Temperature Limits Applicable?
At All Times
- LCO 3.4.8 Specific Activity*
- *
What must be done if thermal power changes 15% within 1 hr?
Sample of I-131, I-133, I-135 within 2 hrs - 6 hrs
- LCO 3.4.1.3 RCS Hot Shutdown*
- *
What are your ≤ 1 hr action(s) if only RCS/RHR 1 loop is OPERABLE while in MODE 4?
- LCO 3.4.1.3 RCS Hot Shutdown*
- Action A*
- *
- Initiate action to restore required loops [Immediately]
AND
- If remaining loop is RHR train: Be in MODE 5 [24 hrs]
- LCO 3.4.1.4.2 RCS Cold Shutdown - Loops Not Filled*
- *
What are your ≤ 1 hr action(s) if all RHR trains are inoperable while in MODE 5 w/ RCS loops not filled?
- LCO 3.4.1.4.2 RCS Cold Shutdown - Loops Not Filled*
- Action B*
- *
- Suspend operations that would dilute RCS < SDM [Immediately]
AND
- Initiate action to restore RHR trains [Immediately]
- *
Note:
All RHR loops may be secured for 1 hr provided:
- Do not dilute RCS < SDM
- RCS Temperature maintained ≥ 10 ˚F below saturation temperature
- LCO 3.4.4 PZR Relief Valves*
- *
What are your ≤ 1 hr action(s) if one PZR PORV block valve is inoperable in MODES 1-3?
- LCO 3.4.4 PZR Relief Valves*
- Action D*
- *
- Restore PORV block to OPERABLE [1 hr]
OR
- Shut associated PORV [1 hr]
AND
- Restore PORV block to OPERABLE [72 hrs]
OR
- Apply CRMP [72 hrs]
OR
- Be in MODE 3 [6 hrs]
AND
- Be in MODE 4 [Following 6 hrs]
- LCO 3.4.9.3 COMS*
- *
What are your ≤ 1 hr action(s) if > 1 CCP is capable of injecting into the RCS while in MODES 4-5 or MODE 6 with the Rx Vessel Head on?
- LCO 3.4.9.3 COMS*
- Action B*
- *
- Initiate action to render all but 1 CCP incapable of injecting into RCS [Immediately]
- LCO 3.4.4 PZR Relief Valves*
- *
What are your ≤ 1 hr action(s) if 1 PZR PORV is inoperable for reasons other than excessive seat leakage while in MODES 1-3?
- LCO 3.4.4 PZR Relief Valves*
- Action B*
- *
- Restore PORV to OPERABLE [1 hr]
OR
- Close associated block valve and remove power [1 hr]
AND
- Restore PORV to OPERABLE [72 hrs]
OR
- Apply the CRMP [72 hrs]
OR
- Be in MODE 3 [6 hrs]
AND
- Be in MODE 4 [Following 6 hrs]
- LCO 3.4.6.2 Operational Leakage*
- *
When is LCO 3.4.6.2 Operational Leakage Applicable?
MODES 1-4
- LCO 3.4.1.2 RCS Hot Standby*
- *
At what SG water level is a SG considered OPERABLE?
10% Narrow Range
- LCO 3.4.6.2 Operational Leakage*
- *
What are your leakage limits?
No Pressure Boundary Leakage
1 gpm unidentified
10 gpm identified
150 gpd through any 1 SG
0.5 gpm/in (Up to 5 gpm) at 2235 psig ± 20 psig
(HHSI/LHSI/RHR/Accumulator Valves)
- LCO 3.4.1.2 RCS Hot Standby*
- *
What are your ≤ 1 hr action(s) if only 1 RCP loop is in operation and the Rx Trip breakers are shut?
- LCO 3.4.1.2 RCS Hot Standby*
- Action B*
- *
- Open Rx Trip Breakers [1 hr]
- LCO 3.4.1.4.1 RCS Cold S/D - Loops Filled*
- *
What are your ≤ 1 hr action(s) if all RHR trains are inoperable while in MODE 5 w/ RCS loops filled?
- LCO 3.4.1.4.1 RCS Cold S/D - Loops Filled*
- Action B*
- *
- Suspend actions that would dilute RCS < SDM [Immediately]
AND
- Initiate action to restore at least 1 RHR train [Immediately]
- *
Note:
All RHR trains may be secured for 1 hr provided:
- Do not dilute RCS < SDM
- RCS Temperature maintained ≥ 10 ˚F below saturation temperature
- LCO 3.4.9.3 COMS*
- *
What are the administrative controls required during testing of inoperable PRZR PORV’s in MODES 4, 5, & 6 with the head on the reactor vessel?
Two RHR trains will be OPERABLE and in operation with the auto closure interlock bypassed to provide COMS.
- LCO 3.4.9.3 COMS*
- *
When is LCO 3.4.9.3 COMS Applicable?
MODES 4-5
MODE 6 w/ Rx vessel head on
- Need COMS OPERABLE
- ≤ 1 CCP
- ECCS Accumulators Isolated
- Only required when Accumulator Pressure > RCS Pressure
- Two PORVS OR ≥ 2” Hole in RCS
- LCO 3.4.1.4.2 RCS Cold Shutdown - Loops Not Filled*
- *
What are your ≤ 1 hr action(s) if a valve or mechanical joint that is used to isolate a unborated water source is found open while in MODE 5 w/ RCS loops not filled?
- LCO 3.4.1.4.2 RCS Cold Shutdown - Loops Not Filled*
- Action C*
- *
- Suspend any operation that would dilute RCS < SDM [Immediately]
AND
- Initiate Action to shut valve/mechanical joint [Immediately]
AND
- Verify SDM [4 hrs] (Must be done if LCO entered)
- *
Note:
Seperate entry condition allowed for each valve/mechanical joint.
- LCO 3.4.2.2 PZR Safeties*
- *
When is LCO 3.4.2.2 PZR Safeties Applicable?
MODES 1-3
Lift setting must be 2485 psig +2%, -3%
- Testing is ±1%
- LCO 3.4.1.3 RCS Hot Shutdown*
- *
What is RHR flow limited to in MODE 4?
125 gpm
CV0198 pinned to control flowrate
- LCO 3.4.3 PZR*
- *
When is LCO 3.4.3 PZR Applicable?
MODES 1-3
- LCO 3.4.6.1 Leakage Detection System*
- *
When is LCO 3.4.6.1 Leakage Detection System Applicable?
MODES 1-4
LCO 3.0.3 can be entered if all leakage detection instrumentation lost.
- LCO 3.4.4 PZR Relief Valves*
- *
What are your ≤ 1 hr action(s) if both PORVs are inoperable for reasons other than seat leakage in MODES 1-3?
- LCO 3.4.4 PZR Relief Valves*
- Action C*
- *
- Apply CRMP [1 hr]
OR
- Restore PORV to OPERABLE [1 hr]
OR
- Close PORV blocks and remove power [1 hr]
AND
- Be in MODE 3 [6 hrs]
AND
- Be in MODE 4 [Following 6 hrs]
