LOT 202.15 SGWLC

Question 1

• LOT 202.15 SGWLC*
• • *

How does the MFRVs control SGWL?

Answer 1

• SG Water Level Mismatch:*
• *2.5 (Actual Level - Program Level)**
• Flow Mismatch:*
• *0.6 (Steam Flow - Feed Flow)**

MFRVs are level dominant.

Question 2

• LOT 202.15 SGWLC*
• • *

How does the LPRVs control SGWL?

Answer 2

• SG Water Level Mismatch:*
• *Actual Level - Program Level**
• PR NI Compensation:*
• *Auctioneered High NI**

Low Power Feed Reg Valves are level dominant.

Question 3

• LOT 202.15 SGWLC*
• • *

What is program SGWL?

Answer 3

• *70.7%**
• SGNR Level*

7300 cabinets maintain program level

Question 4

• LOT 202.15 SGWLC*
• • *

If a SG Pressure channel fails, how does steam flow fail?

Answer 4

• SG Pressure Fails High:*
• *Steam Flow Fails High**
• SG Pressure Fails Low:*
• *Steam Flow Fails Low**

Question 5

• LOT 202.15 SGWLC*
• • *

How does the SGFPTs control SGWL?

Answer 5

• Pressure Mismatch:*
• *Actual D/P - Reference D/P**

• Actual D/P:*
• *Feed Pressure (PT-558) - Steam Pressure (PT-557)**
• Reference D/P:*
• *0% - 20% Steam Flow: 65 psid**
• *100% Steam Flow: 169 psid**
• Goes up linearly from 20% - 100%*

• PT-558 (Common Header Feed Pump Discharge Pressure)
• PT-557 (MS Equalizing Header)
  
  • Same as steam dumps

Note:
Steam flow is the selected steam flow channel on CP006.