Soluble Poison

Question 1

function of boric acid system

Answer 1

add acid to RCS, SFP, CFT, BWST

Question 2

Soluble poison definition

Answer 2

boric acid dissolved in coolant. its a means of reactivity control

Question 3

Boration Definition

Answer 3

raising boron concentration

Question 4

Dilution/Deboration Definition

Answer 4

lowering boron concentration

Question 5

TRM

Answer 5

Modes 1, 2, 3, & 4

• BAAT functional
• > =10F above crystallization
• 1 boric acid pump functional
• flow path from BAAT to MU system >= 10F

Mode 3 RCS <=350F, mode 4
2 makeup pumps shall be functional

Question 6

Basis for level in BAAT

Answer 6

sufficient quantity to borate the RCS to a 1% subcritical margin in cold shutdown, with a stuck control rod, after xenon decay

Question 7

when does pre shutdown start?

Answer 7

20 gallons left

Question 8

Manual Batch initiation (2)

Answer 8

• cv-1248 in letdown AND

- batch size greater than batch total and run key depressed

Question 9

Manual batch termination (2)

Answer 9

• cv-1250 batch controller outlet manually closed OR

- batch total reaches desired batch size or stop key depressed

Question 10

Manual bleed initiation (3)

Answer 10

MUT level >18” AND

batch controller outlet CV-1250 closed

Question 11

Manual bleed termination (2)

Answer 11

• cv-1248 in LETDOWN pos OR

- MUT level <18”

Question 12

Continuous feed & bleed initiation (4)

Answer 12

All of the following satisfied:

• MUT >18”
• safety groups fully withdrawn AND G5 <80% withdrawn OR Safety rods out limit in bypass OR Group 6 >95% withdrawn
• desired batch size > batch total
• batch controller RUN key depressed

Question 13

Continuous feed & bleed termination (6)

Answer 13

any of the following:
-MUT <18"
-cv-1248 in letdown pos
-cv-1250 closed
-batch size >batch total 
-Safety groups not full out OR
G5 >80% and safety rod out limit in normal OR
group 6 <75% withdrawn
-batch controller fault or high flow (>250gpm)

Question 14

max time to pump against shutoff head?

Answer 14

30 seconds