Systems 2 Tech Specs Flashcards
(51 cards)
Tech Spec 3.4.2 Minimum Loop Temp for Criticality
TS 3.4.2 Minimum loop temp for criticality is ≥ 551°F, or be in MODE 2 with k-eff < 1.0 within 30 min
Tech Spec 3.4.3 RCS Pressure and Temperature Limits
RCS pressure, RCS temperature, and RCS heatup and cooldown rates shall be maintained within the limits specified in the PTLR (at all times)
Requirements not met in Modes 1-4
→restore parameters to within limits within 30 minutes AND
→determine RCS is acceptable for continued operation within 72 hrs
Requirements not met NOT in Modes 1-4
→initiate action to restore parameters to within limits immediately AND
→determine RCS is acceptable for continued operation prior to entering Mode 4
What are the Tech Specs for RCS Loop Operability in different Modes?
Tech Spec 3.4.9 Pressurizer Operability
The pressurizer shall be OPERABLE (MODES 1-3) with:
→Pressurizer water level ≤92%; and
→two groups of pressurizer heaters OPERABLE with the capacity of each group ≥150kW
Tech Spec 3.4.10 Pressurizer Safety Valves Operability
Three pressurizer safety valves shall be OPERABLE with lift settings ≥2410 psig and ≤2485 psig (±1%)
(Modes 1-3 and Mode 4 with all RCS cold leg temps > 320° F)
If one PZR safety is inoperable, restore valve to operable within 15 minutes.
Tech Spec 3.4.11 PORV Operability
Since PORVs are not assumed safety function, plant operation can be continued with PORVs isolated by their block valves if they are capable of being manually operated from the Control Board H/S
Tech Spec 3.4.13 RCS Operational Leakage
RCS operational leakage shall be limited to:
→no pressure boundary leakage
→1 gpm unidentified
→10 gpm identified (within makeup)
→150 gpd primary to secondary through any 1 SG
Tech Spec 3.4.14 RCS Pressure Isolation Valve (PIV) Leakage
Leakage from each RCS PIV shall be within limit
NOTE: leakage must be verified within 24 hours following check valve actuation due to flow through the valve (SR 3.4.14.1)
Tech Spec 3.4.15 RCS Leakage Detection Instrumentation
The following RCS leakage detection instrumentation shall be OPERABLE (Modes 1-4):
→one containment sump level and flow monitoring system
→one containment atmosphere particulate radioactivity monitor
→one containment air cooler condensate flow rate monitor or one containment atmosphere radioactivity monitor (gaseous)
If all required monitors inoperable, enter LCO 3.0.3 immediately.
Tech Spec 3.4.16 RCS Specific Activity
The limits on specific activity of the RCS ensures that the resulting 2-hour doses at the site boundary will not exceed a small fraction of the federal limits following a SGTR coincident with a loss of offsite power.
RCS DOSE EQUIVALENT I-131 and DOSE EQUIVALENT XE-133 specific activity shall be within limits (Modes 1-4)
→Dose Equivalent I-131 spec is ≤ 0.45 μCi/g
→If I-131 > 60 μCi/g, be in MODE 3 in 6 hours
→Dose Equivalent Xe-133 spec is ≤ 500 μCi/g
TR 13.4.14 RCS Pressure Isolation Valves
List of Valves
Tech Spec 3.4.1 RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits
→One or more RCS DNB parameters not within limits: restore RCS DNB parameters to within limits within 2 hrs
→Measured RCS flow not within limits: maintain thermal power less than 85% RTP immediately
Tech Spec 2.1.1 Core Operating Safety Limits
→Modes 1 and 2, The departure from nucleate boiling ratio (DNBR) shall be maintained > the 95/95 DNB (95% probability at a confidence level of 95% that the hottest fuel rod is not in DNB)
→Modes 1 and 2, Peak fuel centerline temp. shall be maintained <4700°F (U1) or less than 5080° F at BOL, decreasing 9° F per 10,000 MWD/MTU Burnup. DNB assumptions for 1.30 DNBR
→If violated, restore compliance and be in Mode 3 in 1 hour.
Staying within the temp/press curve in COLR ensures acceptable DNBR is maintained
(If safety limit is violated restart must be authorized by NRC. Shutdown driven by TS → report to NRC within 4 hours.)
Tech Spec 2.1.2 RCS Pressure Safety Limits
→Modes 1,2,3, 4 and 5, ≤2,735 psig, based upon Turbine trip w/o Rx Trip
→If violated in mode 1 or 2 restore and be in mode 3 in 1 hour.
→If violated in mode 3, 4, or 5, restore compliance within 5 minutes.
PZR Safeties, SG Safeties and Hi Press Trip ensure safety limit not exceeded.
(If safety limit is violated restart must be authorized by NRC. Shutdown driven by TS → report to NRC within 4 hours.)
Tech Spec 3.4.3 RCS Pressure and Temperature (P/T) Limits
RCS pressure, RCS temperature, and RCS heatup and cooldown rates shall be maintained within the limits specified in the PTLR at all times.
Requirements not met in Mode 1-4:
→Restore parameter(s) to within limits within 30 minutes AND
→Determine RCS is acceptable for continued operation within 72 hrs
Requirements not met NOT in Mode 1-4:
→Initiate action to restore parameter(s) to within limits immediately AND
→Determine RCS is acceptable for continued operation prior to Mode 4
Tech Spec 3.4.12 Low Temperature Overpressure Protection (LTOP) System
An LTOP system shall be OPERABLE with a maximum of zero Safety Injection pumps and two charging pumps capable of injecting into the RCS and the accumulators isolated and ONE of the following pressure relief capabilities:
→two PORVs with lift settings within limits specified in the PTLR
→two RHR suction relief valves with setpoints ≥436.5 psig and 463.5 psig
Tech Spec 3.4.13 RCS Operational LEAKAGE
RCS operational LEAKAGE shall be limited to:
→no pressure boundary leakage
→1 gpm unidentified leakage
→10 gpm identified leakage
→150 gallons per day primary to secondary leakage through any one steam generator
RVLIS TS light requirements
TS requires 4 lights per train with min of 1 in the head and 3 in the core to be operable
TS 3.5.2 ECCS Operating (MODES 1-3)
Two ECCS trains shall be OPERABLE (Modes 1-3)
→ECCS trains are CCPs, SIPs, RHRPs and piping; accumulators and RWST are not considered part of ECCS for this LCO
→In Mode 3, LTOP system is allowed to prevent ECCS pumps from injecting for up to 4 hours or until all RCS cold leg temps >375° F, whichever comes first
→all ECCS subsystems are credited for LOCA
TS 3.5.3 ECCS Shutdown (MODE 4)
One ECCS train shall be OPERABLE (Mode 4)
→an RHR train is still operable during alignment for decay heat removal if it’s capable of being manually realigned to ECCS
→if ECCS RHR subsystem inoperable, initiate action to restore immediately
→if ECCS CCP subsystem inoperable, restore within 1 hour
TS 3.5.5 Seal Injection Flow (MODES 1-3)
Reactor Coolant Pump seal injection flow shall be ≤40gpm with RCS pressure ≥2215psig and ≤2255psig and the charging flow control valve full open
Modes 1-3
TS 3.6.3 Containment Isolation Valves (MODES 1-4)
Each containment isolation valve shall be OPERABLE (MODES 1-4)
NOTE: Not applicable to Main Steam Safety Valves (MSSVs), Main Steam Isolation Valves (MSIVs), Feedwater Isolation Valves (FIVs), and associated Bypass Valves, and Steam Generator Atmospheric Relief Valves (ARVs).
One or more penetration flow paths with two containment isolation valves inoperable:
→isolate the affected penetration flow path by use of at least one closed and de-activated automatic valve, closed manual valve, or blind flange within 1 hour
(except for containment purge, hydrogen purge, or containment pressure relief valve leakage not within limit)
TS 3.4.16 RCS Activity (MODES 1-4)
Basis - SGTR
The limits on specific activity of the RCS ensures that the resulting 2-hour doses at the site boundary will not exceed a small fraction of the federal limits following a SGTR coincident with a loss of offsite power.
RCS DOSE EQUIVALENT I-131 and DOSE EQUIVALENT XE-133 specific activity shall be within limits (Modes 1-4)
→Dose Equivalent I-131 spec is ≤ 0.45 μCi/g
→If I-131 > 60 μCi/g, be in MODE 3 in 6 hours
→Dose Equivalent Xe-133 spec is ≤ 500 μCi/g
TR 13.1.31 Boron Injection System Operating (MODES 1-4)
Two OPERABLE paths:
→One BAT, one BA transfer pump or Gravity Feed, and one CCP
→RWST, Train A RWST Valve, Train A CCP
→RWST, Train B RWST Valve, Train B CCP
Note: Mode 4 - PDP can be used in place of CCP
