0POP03-ZG-0004 Rx Startup

Question 1

• 0POP03-ZG-0004 Rx Startup*
• • *

If the Rx has been shutdown for > 60 days, what must the PR High Flux Trip Setpoint be lowered to?

Answer 1

85% RTP

Question 2

• 0POP03-ZG-0004 Rx Startup*
• • *

What must be done if any of the following conditions occur?

• Improper group alignment
• DRPI and group step counter disagree by > ± 12 steps
• Improper bank overlap

Answer 2

Insert all control banks

Terminate Rx Startup

Question 3

• 0POP03-ZG-0004 Rx Startup*
• • *

What must the operator be aware of when withdrawing S/D Banks C,D, or E?

Answer 3

No Rod Speed indication on CP005

Question 4

• 0POP03-ZG-0004 Rx Startup*
• • *

What does the Rod Control Startup Switch reset?

Answer 4

• POSSUM:*
• *P/A Converter**
• *Bank Overlap Unit**
• *Step Counters**
• *Slave Cyclers**
• *Urgent Failures**
• *Master Cycler**

Located on CP005.

Question 5

• 0POP03-ZG-0004 Rx Startup*
• • *

While less than the POAH, how many operator controlled reactivity changes are allowed to happen at once?

Answer 5

One at a time

Question 6

• 0POP03-ZG-0004 Rx Startup*
• • *

If BOTH SR channel count rates rise unexpectedly by a factor of two (2) during a Rx Startup, what must be done?

Answer 6

• *Insert all control rods fully into core**
• Both S/D and control banks*

Notify Rx Engineering

Question 7

• 0POP03-ZG-0004 Rx Startup*
• • *

What must be done if criticality is achieved before the RIL? (Control Bank C at 65 Steps)

Answer 7

Emergency Borate

Manually Insert all control banks

Question 8

• 0POP03-ZG-0004 Rx Startup*
• • *

When does the Bank Insert Lo-Lo and Bank Insert Lo annunciators extinguish?

Answer 8

• Bank Insert Lo-Lo:*
• *Control Bank C @ 65 Steps ± 3**
• Bank Insert Lo:*
• *Control Bank C @ 75 Steps ± 3**

Question 9

• 0POP03-ZG-0004 Rx Startup*
• • *

What must be done if ICRR data from three consecutive rod withdrawals predict criticality below Rod Insertion Limit of 65 steps on Bank C?

Answer 9

• *Manually insert all Control Banks into core**
• Not S/D Banks*

Notify Rx Engineering

Notify Unit Operations Manager

Question 10

• 0POP03-ZG-0004 Rx Startup*
• • *

What must be done if a RCS boron sample is VERIFIED to deviate from Estimated Critical Boron Concentration by > 20 ppm?

Answer 10

• *Manually insert all Control Banks into core**
• Not S/D Banks*

Notify Rx Engineering

Notify Unit Operations Manager

Question 11

• 0POP03-ZG-0004 Rx Startup*
• • *

What must be done if the time since Rx S/D is < 80 hrs, AND the time between the expected criticality and time used for the ECP differ by > 1 hr?

Answer 11

• *Manually insert all Control Banks into core**
• Not S/D Banks*

Notify Rx Engineering

Notify Unit Operations Manager

Question 12

• 0POP03-ZG-0004 Rx Startup*
• • *

IF ICRR data from previous rod withdrawals consistently AND unexpectedly predicts criticality at a Control Bank position outside ECP +500 pcm band OR All Rods Out condition, what must be done?

Answer 12

Stop the Rx S/U

Notify Unit Operations Manager

Rx Engineering and SM must evaluate cause

• *If cause cannot be determined in 1 HOUR, then manually insert all control banks into the core**
• Not S/D Banks*

• Note:*
• Same actions if Control bank position outside ECP -500 pcm band but above the minimum insertion limit of Control Bank C at 65 steps.*

Question 13

• 0POP03-ZG-0004 Rx Startup*
• • *

What must be done if T_avg drops below 561 ˚F during a Rx Startup?

Answer 13

• Approach to Criticality:*
• *Trip the Rx**
• Rx Critical:*
• *Tech Spec 3.1.1.4 (15 min to restore)**

If T_avg cannot be restored, trip the Rx

Question 14

• 0POP03-ZG-0004 Rx Startup*
• • *

What parameters must be recorded for critical data when the Rx is stabilized at 1x10^-8 IR amps?

Answer 14

Rod Position

T_avg

RCS Boron Concentration

Question 15

• 0POP03-ZG-0004 Rx Startup*
• • *

Per 0POP03-ZG-0004 Rx Startup, when is MODE 2 entered?

Answer 15

Control Bank Rod Withdrawal commences

Question 16

• 0POP03-ZG-0004 Rx Startup*
• • *

What will cause a rod bottom alarm?

Answer 16

ALL S/D and control banks on bottom

• *ANY S/D rod OR Control Bank A rod on bottom**
• Occurs after ALL S/D rods on top and CB “A” 12 steps off bottom*
• *ANY Control Bank B/C/D rod on bottom**
• Occurs after respective bank 12 steps off bottom*

• Note:*
• Rod Bottom alarm will clear when all S/D rods on top and CB “A” rods 12 steps off bottom.*

Question 17

• 0POP03-ZG-0004 Rx Startup*
• • *

If ICRR unexpectedly predicts criticality < -500 pcm position, what is the maximum amount the operator can pull control rods at a time?

Answer 17

25 Steps
OR
Criticality

Note:
Normally withdraw rods 50 steps at a time

Question 18

• 0POP03-ZG-0004 Rx Startup*
• • *

What are the prerequisites for 0POP03-ZG-0004 (Rx Startup) with regards to the following parameters?

• T_avg
• PZR Level
• PZR Pressure
• SR Counts

Answer 18

• T_avg:*
• *564 ˚F - 570 ˚F**
• PZR Level:*
• *20% - 30%**
• PZR Pressure:*
• *2200 psig - 2250 psig**
• SR Counts:*
• *> 2.0 cps**

Question 19

• 0POP03-ZG-0004 Rx Startup*
• • *

When performing a Rx startup, how many steps until bank overlaps begin?

Answer 19

137 steps

• Control Bank A at 137 steps, Control Bank B will begin to lift.
• Process repeated for control bank C and control bank D.

Question 20

• 0POP03-ZG-0004 Rx Startup*
• • *

Why is Control Bank D at 100 steps normally chosen for the ECP?

Answer 20

Provides adequate AFD control during ascension

Other Control Bank D positions may be used for the ECP to ensure +500 pcm is available.