EOP Week 1 Flashcards
Deck Covers: Intro to EOP, Mass and Energy Balance, Rules of Use, E-0, ES-0.0, ES-0.1, ES-0.2, ES-0.3, SUP-010, SUP-011 (54 cards)
1
Q
With what frequency is it expected that events will occur that require entering EOP series procedures
A
- 10^-8 events per reactor year
2
Q
When is foldout page guidance applicable
A
- Any time that procedure is in effect
3
Q
What conditions requiring using adverse containment criteria
A
- Containment pressure greater than 5 psig
- Radiation dose rates greater than 10^5 (100,000) R/hr
- During an ELAP when Pzr or SG doghouse temperatures are greater than 196.8 deg F
4
Q
When can you quit using adverse containment values
A
- When containment pressure lowers to less than 5 psig
- If dose rates lower below 10^5 (100,000) R/hr and total accumulated dose is less than 10^6 (1,000,000) Rem
- During an ELAP when Pzr or SG doghouse temperatures lower to less than 196.8 deg F
5
Q
For EOP steps with multiple substeps, in which order can the substeps be performed
A
- If the substeps are preceeded by a letter/number then they must be performed in order.
- If the substeps are bulleted then they may be performed in any order
6
Q
If a contingency action cannot be performed what is the crew supposed to do
A
- Proceed to the next step/sub-step
7
Q
What is the order of priority for Critical Safety Functions
A
- (S) Subcriticality
- (C) Core Cooling
- (H) Heat Sink
- (P) Integrity
- (Z) Containment
- (I) Inventory
8
Q
When is continuous monitoring of a Critical Safety Function required
A
- When a Red (Extreme Challenge) or Orange (Severe Challenge) path is present
9
Q
At what periodicity are Yellow (Not Satisfied) and Green (Satisfied) Critical Safety Functions required to be monitored
A
- Every 10-20 minutes
10
Q
Given an ORANGE Subcriticality path and a RED Heat Sink path, which FRP would be entered first and why?
A
- FRH series then FRS if the ORANGE path is still present
- RED before ORANGE, Highest to Lowest Priority
11
Q
What are the fission product barriers
A
- Fuel Cladding
- RCS Pressure Boundary
- Containment
12
Q
As RCS pressure lowers, what happens to break flow
A
- Break flow lowers
13
Q
How does a lowering Tave affect break flow from density effect
A
- Density rises, more mass flows out the break
14
Q
How does a lowering Tave affect break flow from the Choke Flow effect
A
- Break flow flashes to steam further from the break, which lowers back pressure at the break, causing break flow to rise
15
Q
What are the methods of heat removal available on the Primary (RCS) side
A
- ECCS flow
- Break Flow
16
Q
What are the methods of heat removal available on the Secondary (SG) side
A
- AFW
- Steam Generators
17
Q
What are the effects of “Uncovering the Break”
A
- Rapid Depressurization
- Energy Removal (latent heat of evaporization)
- Break flow is reduced
- ECCS flow is raised
18
Q
Where is the worst location to have a SBLOCA and why
A
- Cold Leg
- It requires more mass to be lost before the break is uncovered because the cross under loop seal must be cleared
19
Q
What indications are consistent with a Faulted Steam Generator (E-2)
A
- Tave Lowering
- Rx Power Rising
- SF>FF
- Turbine Load Lowering
- Pzr Pressure Lowering
- Pzr Level Lowering
20
Q
What indications are consistent with a Ruptured Steam Generator (E-3)
A
- Secondary Rad monitors (SJAE/Gland Steam)
- SG Level rising
- Pzr Pressure Lowering
- Pzr Level Lowering
21
Q
What indications are consistent with a LOCA (E-1)
A
- Containment Radiation Monitors
- Pzr Pressure Lowering
- Pzr Level Lowering
- Containment Pressure Rising
- Containment Sump Levels
- Containmetn Dew Point Rising
22
Q
What are the SI termination criteria
A
- Subcooling greater than 40 deg F
- SG NR lvl greater than 13% OR AFW flow greater than 240K pph
- RCS Pressure stable or rising
- Pzr Level greater than 16% (20%) OR {28% (24%) ADVERSE}
23
Q
What are the EOP RCP trip Fold Out Page criteria
A
- Phase B
- RCS pressure less than 1300 # AND 1 CCP or SI pp running
24
Q
What are the AFW switchover Fold Out Page criteria
A
- CST level less than 15%
25
What are the SI actuation Fold Out Page criteria
- RCS subcoolin less than 40 deg F
| - Pzr level cannot be maintained greater than 7%
26
What are the Major Action Categories of E-0
- Verify
- Diagnose
- Actions
27
What are the modes of applicability for E-0
- Rx Trip (Modes 1 & 2)
| - SI (Modes 1-3)
28
When is FR-S.1 Entered from E-0
- If Rx Trip is unsuccessful (i.e., no RNOs are successful)
29
When is FR-H.1 Entered from E-0
- If secondary heat sink cannot be verified (i.e., less than 240k PPH AND less than 13% NR SG lvl)
30
What are the order of diagnostic transitions from E-0 and what is the basis
- E-1 LOCA (If PORV stuck open)
- E-2 Faulted SG (can mask other transients)
- E-3 Ruptured SG (dose to the public)
- E-1 LOCA (Automatic actions in place to mitigate)
31
What are the immediate actions of E-0
- Verify Rx Tripped
- Verify Turbine Tripped
- Verify AC Emergency bus power
- Check SI status
32
Why is AFW flow lowered to less than 450K PPH in E-0
- To limit over cooling of the RCS
33
Why is AFW flow maintained greater than 240K PPH in E-0
- To ensure enough FW flow for decay heat removal (Heat Sink)
34
What are the entry conditions to ES-0.0
- Based on operator judgement with ALL of the following met:
- SI is I/S or required
- E-0 has been exited
- E Series EOP is in progress
35
What are the Major Action categories of ES-0.1 (Reactor Trip Response)
- Ensure Primary stabilizes at No Load
- Ensure Secondary stabilizes at No Load
- Ensure power is available
- Establish/Maintain forced circulation
- Maintain stable RCS
36
In ES-0.1 what must be done for each control rod not fully inserted
- Borate 160 ppm (150 ppm) for each rod not fully inserted
37
What E series procedures can be entered from ES-0.1 (Reactor Trip Response)
- E-0 if SI occurs or is required
| - ES-0.2 if natural circulation cool down is required
38
In ES-0.2 (Natural Circ Cooldown) when are accumulators isolated and why
- Accumulators isolated when RCS pressure is less than 1000# for LTOP
39
In ES-0.2 (Natural Circ Cooldown) when are SI pumps removed and why
- SI pumps removed when temperature is less than 350 deg F for LTOP
40
What E series procedures can be entered from ES-0.2 (Natural Circ Cooldown)
- ES-0.3 for a Natural Circ cool down with a void in the head if CST inventory is low
- (E-0 and E-1 from fold out page)
41
In ES-0.2 (Natural Circ Cooldown) why is there a procedure loop to ensure that Cold Shutdown SDM is met before cooling down
- Because there are stagnant areas of the RCS and the potential for uneven boron cocentrations
42
What is the primary source of cooling during the onset of a Natural Circ cool down
- CRDM fans remove the majority of the heat from the head at the start of a Natural Circ cool down
43
What are the subcooling requirements for an ES-0.2 (Natural Circ Cooldown) Natural Circ cool down with AND without CRDM fans running that ensure head voiding does not occur
- 90 deg F if CRDM fans running
| - 220 deg F if NO CRDM fans running
44
What are the entry conditions for ES-0.3 (Natural Circ Cooldown w/ Void)
- Can ONLY be entered from ES-0.2 once cold shutdown SDM has been achieved (first 13 steps of ES-0.2)
45
What is the first thing that ES-0.3 (Natural Circ Cooldown w/ Void) attempts to accomplish
- Restart an RCP (Do NOT start if subcooling has been lost)
46
While in ES-0.2(Natural Circ Cooldown) for a Natural Circ Cooldown, what must Pressurizer Level be BEFORE starting an RCP IF RVLIS indicates less than full and WHY
- Pzr Level greater than 84%
| - To prevent a loss of subcooling due to lowering Pressurizer Level due to voids collapsing
47
What are the two reasons listed in SUP-010 (RCP Restart) that you would not want to attempt an RCP restart
- If there is a SBLOCA (subcooling lost)
| - Loss of ALL seal cooling (Seal Inj AND CCW)
48
During non-LOCA conditions why should an RCP restart be attempted
- Better heat removal
- Improved Temperature and Pressure control
- Improved Pressurizer Level Control (Spray)
49
What three factors influence Pressurizer Spray Flow
- Vessel and RCS Piping delta P
- Velocity head at spray flow scoop
- Pressurizer Level
- NOT RCS PRESSURE (felt at top and bottom of pressurizer cancels each other out)
50
What are the indications that Natural Circ has been established
- RCS subcooling based on CETC is greater than 40 deg F
- Stable or Lowering SG Pressure, HL temperatures, CETCS
- RCS CL temps at saturation for SG pressure
51
Which Critical Safety Functions are associated with protecting the Fuel Matrix and Fuel Cladding
- Subcriticality
- Core Cooling
- Heat Sink
- Inventory
52
Which Critical Safety Functions are associated with protecting the RCS Pressure Boundary
- Heat Sink
- Integrity
- Inventory
53
Which Critical Safety Functions are associated with protecting Containment
- Containment
54
How can you tell if non-condensables bubble is present in the upper head region
- In EOPs if RCS pressure is less than 150# then assume N2 from accumulators is present in upper head
