Section 3.3 Instrumentation

Question 1

• LCO 3.3.1 Rx Trip Instrumentation*
• • *

If the plant is in MODES 3-5 and we lose 1 or both extended range NIs, what are our actions?

Answer 1

• LCO 3.3.1 Rx Trip Instrumentation*
• Action 5*
• • *

Loss of 1 Extended Range:

• Restore to OPERABLE [72 hrs]

OR

• Suspend all positive reactivity changes [Immediately]

Loss of Both Extended Ranges:

• Suspend all positive reactivity changes [Immediately]

AND

• Isolate unborated water sources [15 min]

AND

• Restore to OPERABLE [1 hr]

OR

• Secure unborated water sources [2 hrs]

AND

• Verify SDM [4 hrs] and every 12 hrs

Question 2

• LCO 3.3.2 ESF Instrumentation*
• • *

If the charging header pressure indicator (PT-0204) fails while in MODES 1-4, what are your actions?

Answer 2

• LCO 3.3.2 ESF Instrumentation*
• Action 16*
• • *
• Place in trip [1 hr]

AND

• Restore to OPERABLE [7 days]

OR

• Be in MODE 3 [6 hrs]

AND

• Be in MODE 5 [Following 30 hrs]

Question 3

• LCO 3.3.5 Remote Shutdown Room*
• • *

When is LCO 3.3.5 Remote Shutdown Room Applicable?

Answer 3

MODES 1-3

Bases:
Allows operators to maintain plant in safe shutdown (MODE 3) from a location other than the control room.

Question 4

• LCO 3.3.1 Rx Trip Instrumentation*
• • *

If the plant is in MODES 1-2 and we lose 1 Intermediate range NI, what are our actions?

Answer 4

• LCO 3.3.1 Rx Trip Instrumentation*
• Action 3*
• • *

Below P-6:

• Restore to OPERABLE before exceeding P-6

Above P-6 but below P-10:

• Restore to OPERABLE before exceeding P-10

Question 5

• LCO 3.3.1 RTS Instrumentation*
• • *

Can the CRMP be applied to anything in LCO 3.3.1 RTS Instrumentation?

Answer 5

No

Most actions involve placing channel in bypass and then placing in trip within 72 hrs.

Note:
LCO 3.3.2 ESFAS Instrumentation: The CRMP can be applied to most things and if it cannot be applied then Be in MODE 3 [6 hrs] and MODE 5 [Following 30 hrs]

Question 6

• LCO 3.3.6 Post Accident Monitoring*
• • *

When is LCO 3.3.6 Post Accident Monitoring Applicable?

Answer 6

MODES 1-3

Most actions are fix within 30 days and submit a report in 14 days.

Question 7

• LCO 3.3.6 Post Accident Monitoring Instrumentation*
• • *

How many sensors can fail in a RVWL probe and RVWL still be OPERABLE?

Answer 7

• *Probe consists of 8 sensors
• 2 in the top / 6 in the bottom***

Need ≥ 1 in the top OPERABLE
AND
Need ≥ 3 in the bottom OPERABLE

Question 8

• LCO 3.3.1 Rx Trip Instrumentation*
• • *

If the plant is in MODE 2 and we lose 1 source range NI, what are our actions?

Answer 8

• LCO 3.3.1 Rx Trip Instrumentation*
• Action 4*
• • *
• Suspend Positive Reactivity Additions [Immediately]
• • *

Limited Cooldown and dilution is allowed if accounted for in SDM