Radioactive Drains

Question 1

Where does the Reactor Cavity Sump collect leakage from ?

Answer 1

Collects leakage & condensate from Reactor Cavity & Excore Instrumentation

Question 2

The max volume of the Reactor Cavity Sump is 520gallons, what should the operation of the both sump pumps be ?

Answer 2

At that volume both sump pumps should be operating

Question 3

Where does the Reactor Cavity Sump vent to ?

Answer 3

It’s vents to containment building atmosphere

Question 4

When will control room alarm be activated for the Reactor Cavity Sump ?

Answer 4

-Generated on high level or if level increases greater than 1gpm for 1hr
-Also may alarm on excessive Sump Pump run time

Question 5

Where do the Reactor Cavity Sump pump to ?

Answer 5

Pumps liquid from Reactor Cavity Sump to the East Containment Sump

Question 6

Where are the Reactor Cavity Sump Pumps powered from ?

Answer 6

They’re powered from 480VAC MCC(NH)

Question 7

Where do the Containment East & West Radwaste Sumps collect from?

Answer 7

Collects leakage & condensed liquid inside containment

Question 8

Where does West Sump receive effluent from inside containment?

Answer 8

-Floor drains
-Equipment Drains
-Refueling Pool
-Refueling Pool linear plate detector compartment

Question 9

What’re the two penetrations on the East Sump receiving effluent from ?

Answer 9

One of them is for:
-Floor Drains
-Equipment Drains
-Refueling Pool
Second is from:
-Reactor Cavity Sump Pumps

Question 10

When will an alarm actuate inside control room East & West Sump?

Answer 10

-Generated on high level or has inflow greater than 1gpm for one hour
-Has abnormal excessive sump pump run time

Question 11

What’re the Containment Radwaste Sump Pumps used for ?

Answer 11

Pumps Containment Sump contents out of containment to Liquid Radwaste TDS Holdup Tanks

Question 12

What should you do during unusual run time containment sump ?

Answer 12

You should report it to the control room

Question 13

Where is Containment Sump run time displayed at ?

Answer 13

Displayed on MCC Breaker & logged on shifting basis

Question 14

Why do the ESF Equipment Room have separate drainage system ‘A’ & ‘B’ trains ?

Answer 14

So that if one ESF room of one train is flooded it won’t jeopardize the other train

Question 15

Where do the ESF ‘A’ & ‘B’ train drainage systems drain to ?

Answer 15

They drain to there own independent segregated sumps

Question 16

What are the penetrations for each ESF Sump ? Where does each sump vent to ?

Answer 16

-SDCHX
-CS Pump Room
-HPSI Pump Room
-LPSI Pump Room
-Pipe Chase
-Vents to Aux. Building HVAC Exhaust

Question 17

What’re the ESF Sump Pumps used for ?

Answer 17

Used to transfer ESF Sump contents to Liquid Radwaste TDS Holdup Tanks

Question 18

What’re the ESF Sump Pumps lubricated by ?

Answer 18

Lubricated by Demineralized Water

Question 19

What kind of capacity do the ESF Sump Pumps have ?

Answer 19

They both have 100% capacity

Question 20

Where does the penetration into the Non-ESF Sump come from ? Where is it vented to ?

Answer 20

-It comes from floor drains & equipment drains throughout the Aux. Building
-Also Equipment Drain Tank relief valve relieves into sump
-Vented to Aux. Building HVAC Exhaust

Question 21

What’re the Non-ESF Sump Pump used for ?

Answer 21

Pump sump contents to liquid Radwaste

Question 22

What happens when Charging Pump Oil Drain Tank becomes full ?

Answer 22

Oil is pumped into a 55gallon drum & rest of water is drained into Radwaste Building Sump

Question 23

What’re the four pipe penetrations into the Fuel Building Sump ? Where does Fuel Building Sump vent to ?

Answer 23

-Floor drains & equipment drains
-Cask Decontamination pit
-Fuel Pool Linear Plate Leak Detector Compartment
-Cask Pit

-Vents to Fuel Building atmosphere

Question 24

What’re the pipe penetrations into the Holdup Tank Area Sump ?

Answer 24

-RMWT
-CVCS Holdup Pump Room
-Refueling Water Tank
-CVCS Holdup Tank Overflow

Question 25

Where do the Decon. & Laundry Facility Sump Pumps deliver water to ?

Answer 25

They pump sump contents to the LR Chemical Drain Tanks

Question 26

Where are the hand switches for Containment Sump Pumps located ?

Answer 26

Located in Control Room on B07

Question 27

What is used to equalize run time for sump pumps ?

Answer 27

An alternator is used to switch between the two pumps

Question 28

When will pump start/ stop when switch is placed in AUTO?

Answer 28

-Will start on sump HI level
-Will stop on sump LO level

Question 29

When a sump pump starts, what else must start ?

Answer 29

Bearing cooling water supply solenoid valve must be energized to provide Demon. Water for lubrication

Question 30

What happens if a HI-HI sump level is reached ? What will happen in control room on HI-HI sump level ?

Answer 30

-It will actuate the standby pump to run
-HI-HI Sump LVL will alarm B07 in Control Room

Question 31

What happens in Radwaste Control Room when Radwaste Building Sump level HI-HI?

Answer 31

Radwaste control room will alarm

Question 32

What happens if sump has LO-LO level on LSLL ?

Answer 32

Any running sump pump will be stopped on LO-LO level

Question 33

What could happen on a loss of Radioactive Drain system ?

Answer 33

-If pumps didn’t work sumps would overflow causing radioactive spill
-If level gets high enough it could cause loss of safety equipment