Temperature Indication

Question 1

State control functions used from WR Temperature Instruments

Answer 1

WR Th: A train LTOP: A Hot 405

WR Tc: B Train LTOP: B Cold 403

Question 2

State how to calculate Delta-T

Answer 2

NR Th gets averaged (3 instruments per loop)

and subtracted from NR Tc

Question 3

State how to calculate AveTave

Answer 3

NR Th gets averaged (3 instruments per loops)
Thave gets averaged with NR Tc for Tave
Each loops Tave gets averaged together for AveTave

Question 4

State Protective and control functions Tave feeds into

Answer 4

OT-Delta T
OP-Delta T
Low Tave (557) with P-4 gives FWI
Low-Low tave (550) gives P-12 (2/4) - SD block
Auc Low Tave (553) C-16
AveTave feeds (Rod Control, Steam Dumps, PZR Level)

Question 5

State the Protective and control functions Delta T feeds into

Answer 5

RIL- Auc High Delta-T
OT-Delta-T
OP-Delta-T

Question 6

Discuss how OP-Delta-T changes as Tave Changes

Answer 6

If Tave increases then the OP-Delta-T setpoint Decreases

No change if Tave decreases

Question 7

Discuss how OT-Delta-T Changes as Tave Changes

Answer 7

If Tave increases, then OT-Delta-T setpoint Decreases

If Tave Decreases, then OT-Delta-T setpoint Increases