EOP Bands

Question 1

What are the stabilization bands of EOP-8, Loss of Offsite Power/Forced Circultation?

Answer 1

Depending on actual temperatures, pressures and levels…..

Tave: 525F-540F target 532F

Pressurizer Pressure: 2050 - 2070 psi, target 2060

Pressurizer Level: 42-57%, in cascade

SG Level: 60-70% target 65%

SG Pressure: Commenserate with Conditions

Cooldown: 0

Question 2

What are possible bands for EOP-3, Station Blackout?

Answer 2

Tave: 525F-540F target 532F - utilizing ADVs

SG Level: 60-70% target 65%

SG Pressure: Commenserate with Conditions

Cooldown: 0

No control over PCS pressure, Pressurizer Level

Question 3

What are potential bands for EOP-4, LOCA?

Answer 3

We will cooldown, so utilize subcooling:

PCS Pressure/Temp: 30-50F via subcooling, watch upper range for inclusion.

Pressurizer Level, notify on scale, then set band.

SG Level 60-70% target 65%, watch lower range for inclusion.

Question 4

What are some possible bands for EOP-5, SGTR?

Answer 4

PCS Pressure/Temp via subcooling: 30-45/ target 35F

• Notify when all T_hots less than 524F
• Notify when PCS pressure less than 940 psi and within 50 PSID positive of faulted SG

Pressurizer Level

• Notify when on scale
• Set band 42-57% target 46% if not in cascade.

SG Pressure

• Maintain isolated faulted SG less than 940F. Notify at 900 psi.
• Good generator - commensorate

SG Level

• Faulted, less than 140%, 110% for degraded: Noftify at 100%
• Good generator: 60-70%, target 65%.

Cooldown: 80-100F, target 90F

Question 5

What are potential bands for ESDE?

Answer 5

PCS Pressure

• Notify at 1605 - for SIAS
• Notify at 1300 - for PCP
• Notify at min pump op curve on Supplement 1

PCS Temperature

• Notify at prior to T_cold <450F - for PCP
• Notify at prior to T_cold< 300F - for PCP
• Notify when faulted SG loop T_cold stop lowering

Pressurizer Level

• Notify on scale
• 0-40%
• 40% to 57%, target 42%

SG Level

• Faulted: N/A
• Good: 60-70%, target 65%

SG Pressure

• Faulted: N/A
• Good: Within 50 PSID positive of faulted.

Cooldown

• Do not add to cooldown

Question 6

What are possible bands for EOP-7, LOAF?

Answer 6

Depends on strategy to be employed.

Option 1 - Stabilize

• Tave: 525F-540F target 532F
• Pressurizer Pressure: 2050 - 2070 psi, target 2060
• Pressurizer Level: 42-57%, in cascade
• SG Level:
  
  • Notify at -50%
• SG Pressure: Commenserate with Conditions
• Cooldown: 0

Option 2 - Cooldown to support Condensate Pump Feeding

PCS Temp/Pressure

• 30-50F Subcooling, target 40F

Pressurizer Level

• 42-57%

SG Level

• Notify at -50%

SG Pressure

• Notify when SG pressure approximately 500 psi

Cooldown Rate

• 80-100F/hr target 90F