Precourse Class Study Notes Flashcards
What is the hydro testing pressure for the pressurizer?
3107 psig
What is the pressurizer pressure safety limit?
2735 psig
What are the power supplies to DC bus 111?
131X via battery charger,
Battery
211 via crosstie breaker
How many control and shutdown banks of control Rods are there?
25 rods in 4 control banks.
28 rods in 5 shutdown banks
What is the difference between Step Counters and Rod Position Indication?
The step counters only count steps not actual position and Rod Position Indication is accurate to within 6 steps
What feeds into and out of the Logic Cabinets for Rod Drive?
Reactor Control Unit feeds into the Logic Cabinet which then feeds into the Power Cabinet
Define Mode 1
Power >5% and Keff >0.99
Define mode 2
Power <5% and Keff >0.99
Define Mode 3
Hot Standby >= 350 degF and Keff <0.99
Define Mode 4
Hot Shutdown Tave between 200-350 degF and Keff <0.99
Define Mode 5
Cold shutdown Tave <= 200 degF and Keff < 0.99
Define Mode 6
One or more reactor vessel head closure bolts less than fully tensioned
What are category I SSCs?
Structures Systems and Components that are designed to remain functional in the event of: Seismic event, Tornado, Maximum probable flood, missile impact, accident internal to the plant
What is the maximum internal pressure and temperature for containment per design basis?
50 psig and 280 degF
How are the Intermediate Range NIs gamma compensated?
The gamma rays interact with the gas in both the inner and outer tube. The neutrons only interact with the Boron in the outer tube. The induced voltage from the inner tube is opposed to the voltage from the outer tube, thus sending a reading of only the voltage from neutron interaction.
What is the set point and flow of the pressurizer safety valves?
420,000 lbm/hr
2460 psig
What is the capacity of the pressurizer heaters?
Variable bank Group C at 400 KW
Backup heater banks A,B,D at 1400 KW
What are the power supplies to the pressurizer heaters?
A&D from Bus 143
B&C from Bus 144
What is the FSAR design basis of the DG?
Sufficient number of DGs to ensure adequate electrical supply to operate ESF loads coincident with:
-LOOP
-Failure of one DG
-DBA LOCA
-Forced shutdown of the other unit
Each DG is housed in a Class I structure with oil storage for 7 days following DBA
What is the purpose of RPS?
Initiates reactor trip:
- To prevent fuel damage during an anticipated operational transient
- Limit core damage for infrequent faults
- Protect the RCS pressure boundary for limiting faults
What is the definition of operable?
When a device is capable of completing its safety design and all related components are also able to perform their safety related function
What is the design flow of the CV pump?
150 gpm at 2500 psig
What are runout conditions for the CV pump?
550 gpm at 600 psig
What is shutoff head for the CV pump?
2600 psig
In automatic mode, where does the CV pump provide minimum flow and at what rate?
52 gpm to ensure flow to RCP seals
What is the design flow of the SI pumps?
1200 psig at 400 gpm
What are runout conditions for the SI pumps?
800 psig at 650 gpm
What is shutoff head for the SI pumps?
1500 psig
What is shutoff head for the RH pumps?
200 psig
What is the design flow of the RH pumps?
165 psig at 3000 gpm
What are runout conditions for the RH pump?
125 psig at 5000 gpm
What is the design basis of SX?
It is the Ultimate Heat Sink and can provide cooling for 30 days with a LOCA in one unit and a shutdown in the other unit
Designed to deliver water at a max temp of 102 degF
What are the level transmitters in RMCS?
LT-112 and LT-185 which are VCT level transmitters
What happens at 5% VCT level?
VCT outlet 112 B&C close and 112 D&E open, CV pumps aligned to RWST
In modes 3-6, when will the Boron Dilution Alert Alarm come in?
70% VCT level on either channel
When will CVCS demin effluent be diverted to the HUT?
At 95% VCT level
Which valve controls the flow of borated water into the mixing blender?
110A
Which valve controls the flow of PW to the mixing blender?
111A
Which valve adds water to the top of the VCT?
111B
Which valve adds water to the bottom of the VCT?
110B
What provides steam to the 1st stage MSR?
4th stage extraction steam from the HP turbine
What provides extraction steam to the 2nd stage MSR?
Main Steam
How can CS be actuated?
Containment Hi-3 >20 psig 2/4
Manual 2/2 PBs
What happens on a Hi-2 in a #1 LPFWH?
The entire string isolates because that heater does not have iso valves for itself
At what power does the FRV start to control SG level?
20%
What parameters input into the FRV for it to modulate open or close?
SG level dominant
Also Steam flow and Feed flow
What will auto start a CC pump?
SI
UV
Discharge pressure <= 85 psig
What is the design basis of Reactor Control System?
Enables the nuclear plant to follow load changes automatically including a 10% step increase or decrease, 5%/minute ramp within load range of 15%-100% without reactor trip, steam dump, or pressure relief.
What is the set point of a P-4 Reactor Trip?
Rx trip brkr and associated bypass breaker NOT racked in and closed on 1/2 trains
What is the function of a P-4 Reactor Trip?
Actuates Turbine Trip
Actuates FW iso with 2/4 Tave < 564 degF
Seals in FW iso from SI or P-14
Allows auto SI block
What is the set point of P-6 Source range?
1/2 IR >= 1.0E-10 amps
2/2 IR <= 5.0E-11 amps to clear
What is the function of P-6 Source range?
Allows manual block of source range high flux trip
Auto energize SR < P-6
What is the setpoint for a P-7 At-Power?
Power above either P-10 or P-13 set point
Power below P-10 and P-13 to clear
What is the function of a P-7 at power?
Unblocks 6 Rx trips: 2-Loop Loss of Flow Prz low pressure Prz high level RCP breaker open RCP bus UV RCP bus UF
