Reactor Control Room Electrical Dist

Question 1

What are the purposes of the loop and capsule DCSs?

Answer 1

Monitor, control and protect loops and capsules.

Question 2

Why are the critical digital functions distributed?

Answer 2

Elimination of single failure points.

Question 3

What DCSs are part of LOCS DCS?

Answer 3

Loop DCS, Capsule DCS

Question 4

What is in Safe 1?

Answer 4

Engineering workstation, 6 operator workstations, security network switch, 2 DPU network switches

Question 5

What are the power supplies to the two ATS in Safe 2?

Answer 5

670-E-455 and 670-E-50

Question 6

What do loops DCS network switches convert?

Answer 6

Digital electrical signal to a digital optical signal and back.

Question 7

What components can be found in a loop RPU?

Answer 7

Redundant PSs, DPU pair, I/O Modules, 2 redundant network switches

Question 8

What is the secondary power supply to all loop DCS RPUs?

Answer 8

670-E-85 LOCS UPS

Question 9

What are the two types of backplanes?

Answer 9

Hardware and software

Question 10

Which workstations receive local alarm information immediately from 1D-N primary DPU?

Answer 10

All loop DCS workstations

Question 11

How can process control be transferred between primary and secondary DPUs?

Answer 11

Automatic (failover) or manual (takeover)

Question 12

What is the purpose of the reset button on a DPU?

Answer 12

Causes DPU to stop controlling and reset

Question 13

Backup network switch is blinking yellow on a DPU. What does that mean?

Answer 13

Comms not established to backup DPU

Question 14

CP LED is blinking yellow/green on a DPU. What does that mean?

Answer 14

Healthy heartbeat

Question 15

The State LED is solid red on a DPU. What does that mean?

Answer 15

Offline or fatal error.

Question 16

How is the plant clock connected to loop DCS?

Answer 16

Via 1C-W DPUs only

Question 17

What passes through loop DCS I/O modules?

Answer 17

All loop data signals and control drive signals.

Question 18

How do I/O modules fail?

Answer 18

To last known value.

Question 19

What are the 4 types of I/O modules?

Answer 19

AIs, AOs, DIs, and DOs.

Question 20

Where are the security servers located?

Answer 20

Safe 2

Question 21

What loop DCS component compares a setpoint with the current value and determines if an error exists?

Answer 21

The DPU

Question 22

Draw basic loop DCS diagram.

Answer 22

Question 23

What types of OS does maxVUE run on?

Answer 23

Microsoft Windows

Question 24

What is required to raise the security level on DCS?

Answer 24

Password

Question 25

What kind of problems are related to Priority 5 alarms?

Answer 25

DCS problems

Question 26

What is the priority of TC alarms?

Answer 26

3

Question 27

What kind of alarms are Priority 4 alarms?

Answer 27

SAR required instrument

Question 28

What does forced mode do on a point control?

Answer 28

Forces DCS to see the point as reading a specific number.

Question 29

What are parameter controllers also called?

Answer 29

Equipment control panels (ECPs)

Question 30

What symbol indicates manual mode is on for a controller?

Answer 30

Hand symbol.

Question 31

How can an operator determine if FCV-10 opened?

Answer 31

Change in the IX Fin

Question 32

What alarm does disabling the SCRAM STATUS button cause?

Answer 32

Loss of Control Power in RCR

Question 33

What causes UVRs to open?

Answer 33

Low pump voltage

Question 34

Where are the UVR keyswitches?

Answer 34

SIU cabinets

Question 35

What are the non-scram power reductions?

Answer 35

Reverse and slow setback.

Question 36

What is required for a loop to cause a slow setback?

Answer 36

At least one Log-N recorder to be above 3NL, ‘W’ switch in the loop on position in the RCR, Slow Setback relays R3 or R3A to be energized.

Question 37

Where are the power reduction settings listed?

Answer 37

EOIL

Question 38

Where are the R3 and R3A relays located?

Answer 38

Back of the SIU

Question 39

What is the purpose of the ‘W’ switch?

Answer 39

Connects the loop with the X-Y bus

Question 40

Why are slow setbacks usually on TCs 1-4?

Answer 40

They are processed faster through temp transmitters in the SIU cabinet.

Question 41

What is the primary power supply for RPU-3?

Answer 41

1C-E-84

Question 42

What does a # indicate in an EARM?

Answer 42

Immediate actions.

Question 43

What can cause a loss of capability for all loop scrams except UVRs?

Answer 43

Loss of loop DPUs.