Mode 2 to Mode 1

Question 1

How do we move power at LOW POWERS (1 x 10-3% to 2%)?

Answer 1

CEA’s

Question 2

How do we move power from 2% to 14%?

Answer 2

Dilution or CEA’s

Question 3

How do we move power above 20%?

Answer 3

Dilution

Question 4

During swapover, what should we expect from TAVG, SG Pressure, PZR Pressure and SG Level?

Answer 4

A momentary Decrease (Shrink in SG)

Question 5

Why are the FW Economizer lines warmed up prior to increase in power to 12%?

Answer 5

Minimize Shrink and Swell (and help control RX changes)

Question 6

Why is only ONE FWIV opened at a time?

Answer 6

TS 3.7.3 Operability

Drains accumulator pressure (CTMT isolation)

Question 7

How do we perform swapover in MANUAL?

Answer 7

Stabilize power 13.5-14.5%
BOTH SG Downcomer Ctrl valves in AUTO
BOTH Econ controllers in MANUAL with zero output
Slow open Econ valves, Downs modulate closed
WHEN both DOWNS closed, raise power to 18-19%
Place BOTH ECONS in AUTO

Question 8

Why do we raise Main Generator load as soon as we SYNC?

Answer 8

To avoid Reverse Power Trip

>50 MW for minimum of 30 seconds

Question 9

What is the minimum allowed load for normal operations for the Main Generator?

Answer 9

5% of rated load (can erode last stage buckets)

10% is recommended (Exhaust Hood temps)

Question 10

Why do we not want to run at FULL SPEED NO LOAD conditions on the Main Turbine?

Answer 10

> 1 hour increases RUB chances

Question 11

Less than 410MW and vacuum 4-5”HgA is allowed for how long?

Answer 11

1 hour maximum

Question 12

If vacuum is > 5”HgA, can we operate the Main Turbine?

Answer 12

NO

Question 13

At BOL, with high back pressure on the Main Turbine, what can occur with the RCS?

Answer 13

SHRINK (cooldown)