E-1 Series

Question 1

E-1 Major Action Categories

Answer 1

1) Monitor Plant systems for optimal operation
2) Check for subsequent failures
3) Determine optimal recovery procedure

Question 2

E-1 FOP

Answer 2

RWST <30%
CST
CR Press Fan
RCP Trip  - 1300# W/ CCP or SI in serv or Phase B
E-2
E-3
SI reinitation - 40F sc or <16% PRZ
RHR restart RCS <300#
Sump Blockage ECA 1.3

Question 3

E-1 When and why do we transition to HL recirc?

Answer 3

7 hours due to Boron plating which reduces heat transfer

Question 4

E-1 What are the LOCA phases?

Answer 4

Blowdown
Refill (LBLOCA Only)
Reflood
Long term recirc

Question 5

E-1 Why is a cold leg LOCA the most impactful?

Answer 5

Cross under loop creates loop seal therefore, energy cannot be removed. Pressure rises and core level loweres in the vessel.

On natural circ - Tcold will be colder than with an RCP running. Colder = more dense = more mass loss

Question 6

What differentiate a Small vs LBLOCA?

Answer 6

Leak
Within Charging system capability

SMBLOCA:
3/8” diameter (UFSAR)
No RHR
Charging cannot maintain

LBLOCA:
1’ diameter (UFSAR)
RHR Flow >400gpm and RCS P < RHR (EOP)

Question 7

Cold Leg recirc TCA

Answer 7

5 min - swap to cold leg recirc
5 min - CTS to recirc sump
15 min after cold leg recirc - adjust CCW to RHR to 5000g prevent runout if pump fails

Question 8

Spray TCA

Answer 8

50/70hr place RHR Spray I/s (50 - ensure core heat removal 70 protect cnmt)
6-22hr H2 recombines (6 cnmt heat / 22 cnmt pressure)
24 hr - CTS / RHR Spray needs to be I/s for CR dose

Question 9

Hot Leg recirc TCA

Answer 9

5.5 - 7.5hr / hot leg for boron plating

15 min - align 1 CCP to HL recirc

Question 10

SI TCA

Answer 10

90 min start and monitor PACHMS

Question 11

LOOP + LOCA TCA

Answer 11

6 hr start CCW fans

Question 12

What are accumulator limits and why?

Answer 12

Level 921ft - 971ft - low lvl not enough to cover to core mid-plane / hi not enough N2 to inject
Pressure - Low no inject into RCS / Hi to much will dump

Accum outlet valves closed RCS < 150 - prevent N2 from injecting

Question 13

What are the 10CFR5046 Criteria?

Answer 13

PCT 2200F
17% Localized Cladding Oxidation
1% H2 concentration
Coolable Geometry 
Long term cooling

Question 14

What is an indication of a PRZ steam space leak?

Answer 14

Prz level will rise

Question 15

What are the methods of heat RCS heat removal during a LOCA?

Answer 15

ECCS Flow and Break Flow

AFW / SG

Question 16

What are the indications of a LOCA?

Answer 16

RCS P, PRZ lvl SG press lower

CNMT P, CNMT Sump, CNMT Rad

Question 17

E-1 What is the purpose of Step 9 loop?

Answer 17

Ensure in correct procedure. If SG P is lowering or RCS P rising go to step 1 and Check for faulted SG that is still blowing down. When SG is done blowing down E-1 Si termination criteria will be met which are less restrictive than ES1.2 criteria (if you continue past step 9)

Question 18

If in E-1 and RCS P is >300# where will you go?

Answer 18

ES1.2 post LOCA cool down

Question 19

If in E-1 and RCS P <300# where will you go?

Answer 19

ES 1.3 then back to E-1