M/U Wtr Cntrl

Question 1

Boric acid xfr pumps flowpaths…..?
P.S……….?
Capacity……?
Interlocks….?

Answer 1

Recirc BAST, BAST->blender or CCP, batching tank -> BAST
1-1…..F
1-2….G
Low-37.5gpm, Hi-75gpm
Intlk- while in auto Lvct < 14% -> fast 24%-> low
Manual blend/boration-> fast integrator->low

Question 2

Chemical mixing tank functions

Answer 2

LiOH- ph Control
Hydrazine- O2 control
H2O2- crud burst

Question 3

What are these valves? What is failure pos?
FCV-111A
FCV-111B
FCV-110A
FCV-110B

Answer 3

111A-MUW->blender (closed)
111B-Blender->top VCT (closed)
110A-BAST->blender (open)
110B-Blender->bottom VCT (closed)

Question 4

Position of......when in borate?
FCV-111A
FCV-111B
FCV-110A
FCV-110B

Answer 4

111A-closed
111B-closed
110A-open
110B-open

Question 5

Position of......when in dilute?
FCV-111A
FCV-111B
FCV-110A
FCV-110B
Controller inputs?

Answer 5

111A-open
111B-open
110A-closed
110B-closed
Volume input, rate input

Question 6

Position of......when in auto?
FCV-111A
FCV-111B
FCV-110A
FCV-110B
Inputs to controller?

Answer 6

111A-open
111B-closed
110A-open
110B-open
Lvct, RCS [B], BAST [B]

Question 7

Position of......when in alt dilute?
FCV-111A
FCV-111B
FCV-110A
FCV-110B

Answer 7

111A-open
111B-open
110A-closed
110B-open

Question 8

Position of......when in manual?
FCV-111A
FCV-111B
FCV-110A
FCV-110B

Answer 8

111A-open
111B-closed
110A-open
110B-open

Question 9

Preferred methods to borate per AP-6 and order

Answer 9

Normal boration-1
8104(emergency boration MOV)-2
RWST suction-3
8471(emergency boration manual valve)-4

Question 10

Possible outputs of blender?

Answer 10

VCT top
VCT bot
RWST
LHUTs

Question 11

Bags of boric acid—–>borate RCS ?

Answer 11

Mix boric acid in batching tank
Batching tank—>BART
BART——->BAST
BAST——>blender(CVCS)

Question 12

PWMU pumps……..
P.S.
Functions
Interlocks

Answer 12

1-1(F),1-2(G)
One running, one in auto, stby starts any time Makeup controller demands
Trips-low PWST lvl, O.C., thermal ovrld

Question 13

Purpose/ functions MU water control system

Answer 13

• Add pure water to 4% boric acid to RCS for reactivity control during norm or emergency
• S/d reactor by adding 4% B.A.
• add fast enough to stay crit/sub crit as Xe decays
• have enough B.A. (14042 gal) to maintain adequate SDM