INCORES

Question 1

SPND signals reliability

Answer 1

SPND signals are NOT reliable at temperatures >1000°F and should NOT be used at <15% power.

Question 2

Waiting time for incore readings after power change

Answer 2

Must wait 5 minutes after a power change to use incore readings and 10 minutes for calibration (Rh decay).

Question 3

T.S. 3.5-2 requirement for BIRO incore thermocouples

Answer 3

2 of 4 BIRO incore thermocouples per quadrant must be OPERABLE; restore in 7 days or be in HSD in 6 hours and CSD in 30 hours.

Question 4

Incore thermocouples requirement during RCS drain-down

Answer 4

2 incore thermocouples must be OPERABLE and in the core when RCS is drained down to below the tops of hot leg nozzles.

Question 5

T.S. 3.5.2.4 Quadrant Tilt action

Answer 5

Exceeding the tilt limit requires reducing reactor power by 2% for each 1% in excess of the tilt limit.

Question 6

T.S. 3.5.2.7 Axial Imbalance action

Answer 6

If an acceptable axial power imbalance is NOT achieved in 24 hours, reduce reactor power to ≤40% FP within 2 hours.

Question 7

T.S. 3.5.2.8 Power map requirement

Answer 7

Must perform a power map within limits of COLR every 31 days.

Question 8

BIRO thermocouples operability requirement

Answer 8

With <2 BIRO thermocouples per quadrant OPERABLE, restore in 7 days or be in HSD in 6 hours and CSD in 30 hours.

Question 9

Importance of tilt and imbalance drawings

Answer 9

Know the tilt and imbalance drawings in Tech Specs to differentiate between conditions.