Precourse Class Study Notes

Question 1

What is the hydro testing pressure for the pressurizer?

Answer 1

3107 psig

Question 2

What is the pressurizer pressure safety limit?

Answer 2

2735 psig

Question 3

What are the power supplies to DC bus 111?

Answer 3

131X via battery charger,
Battery
211 via crosstie breaker

Question 4

How many control and shutdown banks of control Rods are there?

Answer 4

25 rods in 4 control banks.

28 rods in 5 shutdown banks

Question 5

What is the difference between Step Counters and Rod Position Indication?

Answer 5

The step counters only count steps not actual position and Rod Position Indication is accurate to within 6 steps

Question 6

What feeds into and out of the Logic Cabinets for Rod Drive?

Answer 6

Reactor Control Unit feeds into the Logic Cabinet which then feeds into the Power Cabinet

Question 7

Define Mode 1

Answer 7

Power >5% and Keff >0.99

Question 8

Define mode 2

Answer 8

Power <5% and Keff >0.99

Question 9

Define Mode 3

Answer 9

Hot Standby >= 350 degF and Keff <0.99

Question 10

Define Mode 4

Answer 10

Hot Shutdown Tave between 200-350 degF and Keff <0.99

Question 11

Define Mode 5

Answer 11

Cold shutdown Tave <= 200 degF and Keff < 0.99

Question 12

Define Mode 6

Answer 12

One or more reactor vessel head closure bolts less than fully tensioned

Question 13

What are category I SSCs?

Answer 13

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

Question 14

What is the maximum internal pressure and temperature for containment per design basis?

Answer 14

50 psig and 280 degF

Question 15

How are the Intermediate Range NIs gamma compensated?

Answer 15

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.

Question 16

What is the set point and flow of the pressurizer safety valves?

Answer 16

420,000 lbm/hr

2460 psig

Question 17

What is the capacity of the pressurizer heaters?

Answer 17

Variable bank Group C at 400 KW

Backup heater banks A,B,D at 1400 KW

Question 18

What are the power supplies to the pressurizer heaters?

Answer 18

A&D from Bus 143

B&C from Bus 144

Question 19

What is the FSAR design basis of the DG?

Answer 19

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

Question 20

What is the purpose of RPS?

Answer 20

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

Question 21

What is the definition of operable?

Answer 21

When a device is capable of completing its safety design and all related components are also able to perform their safety related function

Question 22

What is the design flow of the CV pump?

Answer 22

150 gpm at 2500 psig

Question 23

What are runout conditions for the CV pump?

Answer 23

550 gpm at 600 psig

Question 24

What is shutoff head for the CV pump?

Answer 24

2600 psig

Question 25

In automatic mode, where does the CV pump provide minimum flow and at what rate?

Answer 25

52 gpm to ensure flow to RCP seals

Question 26

What is the design flow of the SI pumps?

Answer 26

1200 psig at 400 gpm

Question 27

What are runout conditions for the SI pumps?

Answer 27

800 psig at 650 gpm

Question 28

What is shutoff head for the SI pumps?

Answer 28

1500 psig

Question 29

What is shutoff head for the RH pumps?

Answer 29

200 psig

Question 30

What is the design flow of the RH pumps?

Answer 30

165 psig at 3000 gpm

Question 31

What are runout conditions for the RH pump?

Answer 31

125 psig at 5000 gpm

Question 32

What is the design basis of SX?

Answer 32

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

Question 33

What are the level transmitters in RMCS?

Answer 33

LT-112 and LT-185 which are VCT level transmitters

Question 34

What happens at 5% VCT level?

Answer 34

VCT outlet 112 B&C close and 112 D&E open, CV pumps aligned to RWST

Question 35

In modes 3-6, when will the Boron Dilution Alert Alarm come in?

Answer 35

70% VCT level on either channel

Question 36

When will CVCS demin effluent be diverted to the HUT?

Answer 36

At 95% VCT level

Question 37

Which valve controls the flow of borated water into the mixing blender?

Answer 37

110A

Question 38

Which valve controls the flow of PW to the mixing blender?

Answer 38

111A

Question 39

Which valve adds water to the top of the VCT?

Answer 39

111B

Question 40

Which valve adds water to the bottom of the VCT?

Answer 40

110B

Question 41

What provides steam to the 1st stage MSR?

Answer 41

4th stage extraction steam from the HP turbine

Question 42

What provides extraction steam to the 2nd stage MSR?

Answer 42

Main Steam

Question 43

How can CS be actuated?

Answer 43

Containment Hi-3 >20 psig 2/4 | Manual 2/2 PBs

Question 44

What happens on a Hi-2 in a #1 LPFWH?

Answer 44

The entire string isolates because that heater does not have iso valves for itself

Question 45

At what power does the FRV start to control SG level?

Answer 45

20%

Question 46

What parameters input into the FRV for it to modulate open or close?

Answer 46

SG level dominant | Also Steam flow and Feed flow

Question 47

What will auto start a CC pump?

Answer 47

SI UV Discharge pressure <= 85 psig

Question 48

What is the design basis of Reactor Control System?

Answer 48

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.

Question 49

What is the set point of a P-4 Reactor Trip?

Answer 49

Rx trip brkr and associated bypass breaker NOT racked in and closed on 1/2 trains

Question 50

What is the function of a P-4 Reactor Trip?

Answer 50

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

Question 51

What is the set point of P-6 Source range?

Answer 51

1/2 IR >= 1.0E-10 amps | 2/2 IR <= 5.0E-11 amps to clear

Question 52

What is the function of P-6 Source range?

Answer 52

Allows manual block of source range high flux trip | Auto energize SR < P-6

Question 53

What is the setpoint for a P-7 At-Power?

Answer 53

Power above either P-10 or P-13 set point | Power below P-10 and P-13 to clear

Question 54

What is the function of a P-7 at power?

Answer 54

``` Unblocks 6 Rx trips: 2-Loop Loss of Flow Prz low pressure Prz high level RCP breaker open RCP bus UV RCP bus UF ```