E-0 (Rx trip)

Question 1

E-0

What are the SI termination criteria?

Answer 1

• Subcooling (CET) > 20 deg F
• Heat sink ( > 15% NR L _s/g or 435 gpm AFW)
• Prcs - stable or rising
• L_pzr > 12%

Question 2

E-0

What are the procedures that you can transition to from “Rx Trip”?

Answer 2

• FR-S.1, ATWS (s 1, rx not tripped)
• E-0.1, Rx trip response (s 4, no SI)
• E-1, LOCA (s 7, PORV/ Safety stuck)
  
  • s 11, diag
  • s 28, P_rcs < 300 psig
  • s 29, P_rcs < 300 psig
• E-2, Fault S/G (s 9, diag)
• E-3, Rupt S/G (s 10, diag)
  
  • s 25, S/G act norm
• E-1.2, Pst LOCA c/d (s 15, P_rcs lowering)
  
  • s 18, L_pzr lowering
• ECA-1.2 LOCA outsd cnmt (s 26, Aux Rad mon)
• E-1.1, SI Termination (s 19, post diag)

Question 3

E-0

What actions do you take in E-0 if you have ……

no vital 4 kv busses energized?

one vital 4 kv bus energized?

two vital 4 kv buses energized?

Answer 3

0 - go to ECA-0.0

1 - impliment ECA-0.3

2 - refer to ECA-0.3 while continueing

Question 4

E-0

What parameters do you check to determine if…..

Fautled S/G

Ruptured S/G

Intact RCS

Answer 4

E-2

• P _s/g not lowering in uncontrolled manner
• no S/G completely depressurized

E-3

• RM 15/15R, 71-74, 19 no upward trends or spikes
• SJAE, S/G B/D, Mn stm Hi Rad Pks out
• L _s/g not rising in uncontrolled manner

E-1

• P_cnmt normal
• L _{cnmt smp} normal
• cnmt Rad normal

Question 5

E-0

What are the conditions for adverse CNMT?

What is RCP trip criteria?

What actions do you take if Phase B actuates?

Answer 5

1. P_cnmt > 3 psig
2. Cnmt Rad > 10⁵ R/hr
3. Cnmt dose > 10⁶ R

• Prcs < 1300 psig
• at least one ECCS CCP or SI running
• maintain seal inj, 8-13 gpm

1. ensure spray actuates
2. trip RCPs w/in 5 min
3. align vlvs if nec (white lights)
4. maintain seal inj, 8-13 gpm