SQ: Radiation Monitoring

Question 1

What are the ESFAS related signals that are generated by SQ?

Answer 1

CREFAS
FBEVAS
CPIAS

Question 2

What are the non-safety related automatic functions generated by SQ?

Answer 2

Through Filter Mode in AR
GR isolation
AS condensate to LR

Question 3

What is the power supply to the safety related radiation monitors?

Answer 3

PN

Question 4

From where can you read radiation monitors?

Answer 4

Locally
RMS workstation
ERFDADS

Question 5

What does Green signify in SQ?

Answer 5

Normal Reading

Question 6

What does Yellow signify in SQ?

Answer 6

Alert Reading

Question 7

What does Orange signify in SQ?

Answer 7

Problem

Question 8

What does Red signify in SQ?

Answer 8

Alarm Reading

Question 9

Which radiation monitors are covered under the ODCM?

Answer 9

Waste Gas (RU-12)
Plant Vent (RU-143/144)
Fuel Building Vent (RU-145/146)

Question 10

What is RU-1

Answer 10

Containment Atmosphere

Question 11

What are RU-2 and RU-3?

Answer 11

EW System Radiation Monitors

Question 12

What are RU-4 and RU-5?

Answer 12

SG Blowdown

Question 13

What is RU-6?

Answer 13

NC System Monitor

Question 14

What is RU-7?

Answer 14

AS Condensate Receiver Tank monitor

Question 15

What is RU-12?

Answer 15

Waste Gas Decay Tank Discharge

Question 16

What is RU-14?

Answer 16

Radwaste Building Vent

Question 17

What is RU-15?

Answer 17

Waste Gas Area combined vent

Question 18

What is RU-17?

Answer 18

Incore Instrument Containment area monitor

- De-energized while at power!

Question 19

What is RU-18?

Answer 19

Control Room Area monitor

Question 20

What is RU-19?

Answer 20

New Fuel Area monitor

Question 21

What are RU-29 and RU-30?

Answer 21

Control Room Vent Intake

Question 22

What is RU-31?

Answer 22

Spent Fuel Pool Area monitor

Question 23

What is RU-33?

Answer 23

Refueling Machine Area monitor

Question 24

What is RU-34?

Answer 24

Refueling Purge Exhaust monitor

Question 25

What are RU-37 and RU-38?

Answer 25

Power Access Purge Area monitors

Question 26

What are RU-139 and RU-140?

Answer 26

Rad monitors on MS lines in MSSS

Question 27

What is RU-141?

Answer 27

Condenser Vacuum/Gland Seal monitors

Question 28

What is RU-142A-D?

Answer 28

Rad monitors on MS lines inside Turbine Building

Question 29

What are RU-143 and RU-144?

Answer 29

Plant Vent Low/High Range Monitor

- Also monitors humidity

Question 30

What are RU-145 and RU-146?

Answer 30

Fuel Building Low/Mid/High Range Monitors

Question 31

What are RU-148 and RU-149?

Answer 31

High Range Containment Area Monitors

Question 32

What are RU-150 and RU-151?

Answer 32

Primary Coolant Monitors

Question 33

What is RU-155D?

Answer 33

Letdown Line Monitor

Question 34

What ESFAS Signal will isolate RU-1?

Answer 34

CIAS

Question 35

What is the basis for RU-1?

Answer 35

It will detect a 1 gpm leak in Containment in 1 hour

Question 36

Which RU monitor will be the first to alarm during SGTR

Answer 36

RU-7

Question 37

When RU-7 reaches its setpoint, what happens?

Answer 37

AS Condensate is directed to the LRS

Question 38

What signal is generated when RU-29 or RU-30 reaches its setpoint?

Answer 38

CREFAS

Question 39

What signal is generated when RU-31 reaches its setpoint?

Answer 39

FBEVAS

Question 40

What happens when RU-37 or RU-38 reaches its hi-hi setpoint?

Answer 40

CPIAS

Question 41

What is the basis for RU-141?

Answer 41

1 gpm SGTR with 1% failed fuel

Question 42

What is the basis for RU-142A-D?

Answer 42

30 gallon per day upper tube bundle leak on the hot side

Question 43

What will RU-143/RU-145 and RU-144/RU-146 do when they reach their max range?

Answer 43

They’ll start their associated high range monitors and then shut down.

Question 44

What is the basis for the alarm on RU-155D?

Answer 44

Based on 1% failed fuel. Has a “keep alive source” so that rad levels have to reach >10 mrem/hr before they register.