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0. Biennial Written Prep > EOP Week 7 & 8 > Flashcards

EOP Week 7 & 8 Flashcards

Deck Covers: FR-H, FR-C, FR-I, FR-P

1
Q

What is the most effective way to exit FR-C.1 “Response to Inadequate Core Cooling”

A
  • Establish ECCS Flow
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2
Q

While in FR-C.1 “Response to Inadequate Core Cooling” what is the basis for the rapidly depressurizing SGs to depressurize the RCS at maximum rate

A
  • Allows accumulators and RHR pump injection
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3
Q

While in FR-C.1 “Response to Inadequate Core Cooling” if normal support conditions for starting an RCP are NOT available, what action is taken

A
  • Start 1 RCP at a time until CETCs are LESS THAN 1200 deg F
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4
Q

What parameters are used to determine Core Cooling CSFST status

A
  • Subcooling
  • CETC temps
  • RVIS Level w/ RCP status
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5
Q

What CETC temperature corresponds to superheated conditions

A
  • 757 deg F
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6
Q

What is the primary goal of maintaining Core Cooling

A
  • Maintain the RCS subcooled
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7
Q

What is the definition of Degraded Core Cooling (Orange Path)

A
  • CETCs GREATER than 757 deg F
    OR
  • RVLIS LESS than 46%
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8
Q

During a CL SBLOCA, what happens when the loop seal clears

A
  • Rapid depressurization causes mass loss to be greatly reduced
  • Energy removal increases
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9
Q

What size SBLOCA is the most limiting and WHY

A
  • 1” break because the loop seal never clears
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10
Q

What are high CETC temperatures (GREATER THAN 757 deg F) an indication of

A
  • Superheated conditions
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11
Q

What are low RVIS levels and indication of

A
  • Core uncovered
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12
Q

What COLOR is entry into FR-C.1 “Response to Inadequate Core Cooling”

A
  • RED PATH
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13
Q

While in FR-C.1 “Response to Inadequate Core Cooling”, if SI IS NOT terminated, what are the consequences

A
  • Prevents performing any of the INVENTORY FRPs
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14
Q

What indication is used to determine that the core is re-covered

A
  • RVLIS GREATER THAN 46%
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15
Q

While in FR-C.1 “Response to Inadequate Core Cooling”, WHY are RCPs stopped after the SGs are depressurized to 160 PSI

A
  • Due to a loss of #1 RCP seal requirements
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16
Q

While in FR-C.1 “Response to Inadequate Core Cooling”, WHY are RCPs running desired

A
  • Provide forced 2 phase flow to prevent inadequate core cooling (DO NOT TRIP UNLESS DIRECTED BY PROCEDURE)
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17
Q

What COLOR is entry into FR-C.2 “Response to Degraded Core Cooling”

A
  • ORANGE PATH
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18
Q

While in FR-C.2 “Response to Degraded Core Cooling”, if ALL RCPs are running, what action is taken

A
  • Stop #3 RCP for later use
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19
Q

What COLOR is entry into FR-H.1 “Loss of Secondary Heat Sink”

A
  • RED PATH
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20
Q

While in FR-H.1 “Loss of Secondary Heat Sink”, WHEN would Secondary Heat Sink NOT be required

A
  • During LBLOCA OR RCS Temperature less than 350 deg F (RHR entry condition)
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21
Q

While in FR-H.1 “Loss of Secondary Heat Sink”, if NO CCP is available for bleed and feed what action is taken

A
  • IF ALL SG WR lvls are GREATER THAN 31% THEN stop ALL RCPs and bleed and feed immediately to ensure sufficient SI flow
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22
Q

While in FR-H.1 “Loss of Secondary Heat Sink” how is restoration of Secondary Heat Sink verified

A
  • Lowering RCS Temps (CL, HL, CETCs) AND rising SG Lvl
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23
Q

While in FR-H.1 “Loss of Secondary Heat Sink” following bleed and feed initiation, AFTER feed flow is restored given the following conditions how are feed flows controlled:

  • CETCs are RISING
  • At least ONE SG IS NOT dry
A
  • Feed any SGs that are NOT dry at MAX rate
  • WHEN CETCs lower. check active SG for fault/rupture
  • IF faulted/ruptured, THEN feed ONE intact SG at 50k pph
  • WHEN intact SG is greater than 16% WR, THEN raise flow as necessary to maintain CETC AND isolate faulted/ruptured SG
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24
Q

While in FR-H.1 “Loss of Secondary Heat Sink” following bleed and feed initiation, AFTER feed flow is restored given the following conditions how are feed flows controlled:

  • CETCs are RISING
  • ALL SGs are dry
A
  • Feed ONE SG at max rate
  • WHEN CETCs lower. check active SG for fault/rupture
  • IF faulted/ruptured, THEN feed ONE intact SG at 50k pph
  • WHEN intact SG is greater than 16% WR, THEN raise flow as necessary to maintain CETC AND isolate faulted/ruptured SG
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25
Q

While in FR-H.1 “Loss of Secondary Heat Sink”, what are the criteria for Bleed and Feed initiation

A
  • No CCPs available AND ALL SG WR lvls GREATER THAN 31%
    OR
  • LESS THAN 3 SG WR lvls GREATER THAN 16%
26
Q

What are the benefits of Bleed and Feed in response to inadequate Secondary Heat Sink

A
  • Minimizes the amount the core is uncovered

- Prevents inadequate core cooling

27
Q

What are the benefits of stopping ALL RCPs in response to inadequate Secondary Heat Sink

A
  • Preserves SG inventory by removing RCP heat and backpressure
28
Q

What is the definition of a dry SG

A
  • Any WR lvl LESS THAN 16% w/ NO feed flow
29
Q

While in FR-H.1 “Loss of Secondary Heat Sink”, IF there are LESS THAN two Pzr PORV flow paths open OR CETCs are rising what action is taken

A
  • Initiate Bleed through RVCH vents (NSOs)
30
Q

What is the preferred order of Secondary Heat Sink

A
  • AFW (own unit)
  • AFW (opposite unit)
  • MFW
  • Condensate if 1 SG is LESS THAN 220 PSIG
31
Q

What is the primary indication DIFFERENCE that indicates Natural Circulation is established (vs. loss of heat sink)

A
  • Large delta T indicated Natural Circ.
32
Q

When responding to high SG level, what action is required after NR level comes back on scale

A
  • Evaluation is required prior to releasing steam due to the potential for residual water remaining in the steam lines
33
Q

If you have an SI, and ECCS is IN SERVICE do you perform FR-I.1 “Response to High Pressurizer Level”

A
  • No, you return to procedure and step in effect at Step 1 RNO
34
Q

What is the CSFST color for ALL FR-I procedures

A
  • YELLOW
35
Q

While in FR-I.3 “Response to Voids in Rx Vessel”, what is the purpose of checking RCS pressure LESS THAN 1725# PRIOR to raising RCS Pressure

A
  • To condense any voids present to ensure there are no superheated hard bubbles
36
Q

While in FR-H.1 “Loss of Secondary Heat Sink” following bleed and feed initiation, AFTER feed flow is restored given the following conditions how are feed flows controlled:

  • CETCs are STABLE or LOWERING
  • ALL SGs are dry
A
  • Feed ONE SG at LESS THAN 50k pph

- WHEN active SG WR is GREATER THAN 17%, THEN raise FF as desired

37
Q

While in FR-H.1 “Loss of Secondary Heat Sink” following bleed and feed initiation, AFTER feed flow is restored given the following conditions how are feed flows controlled:

  • CETCs are STABLE or LOWERING
  • At least ONE SG IS NOT dry
A
  • Feed any SGs that ARE NOT dry as necessary to restore NR level
38
Q

Given the following conditions which FR-C procedure is entered:
- Lowest CETC GREATER THAN 1200 deg F

A
  • FR-C.1
39
Q

Given the following conditions which FR-C procedure is entered:

  • Lowest CETC is 757 deg F
  • RVLIS NR LESS THAN 46%
A
  • FR-C.1
40
Q

Given the following conditions which FR-C procedure is entered:

  • Lowest CETC is 757 deg F
  • RVLIS NR GREATER THAN 46%
A
  • FR-C.2
41
Q

Given the following conditions which FR-C procedure is entered:

  • Lowest CETC is 756 deg F
  • RVLIS NR LESS THAN 46%
A
  • FR-C.2
42
Q

If RCPs are running, what temperature can you expect CETCs to be LESS THAN

A
  • 1200 deg F
43
Q

If entering an FR-C series FRP, what other FRP is expected to be NOT SATISIFED

A
  • FR-I
44
Q

Which fission product barrier is DIRECTLY challenged by INADEQUATE/DEGRADED Core Cooling

A
  • Fuel Cladding
45
Q

List the methods for re-establishing Core Cooling IN ORDER from MOST to LEAST effective

A
  • Restore ECCS flow
  • Dump Steam from SGs
  • Start RCPs
  • Vent RCS
46
Q

What is the major difference between FR-P.1 “Response to Imminent Pressurized Thermal Shock Condition” and FR-P.2 “Response to Anticipated Pressurized Thermal Shock” with regards to the cooldown that is performed

A
  • FR-P.1 has a 50 deg per 60 min limitation on the cooldown

- FR-P.2 has a 100 deg per 60 min limitation on the cooldown

47
Q

While in FR-C.1 “Response to Inadequate Core Cooling” OR FR-C.2 “Response to Degraded Core Cooling”, WHY is the depressurization STOPPED at 160#

A
  • To ISOLATE Accumulators to prevent N2 from injecting
48
Q

While in FR-P.1 “Response to Imminent Pressurized Thermal Shock Condition” IF SI Termination Criteria ARE NOT met, what action is taken and why

A
  • Start RCP to mix ECCS flow to minimize thermal stress on vessel
49
Q

What is the Cold Leg temperature that indicates a need to enter FR-P.1

A
  • 285 deg F
50
Q

What is the Cold Leg temperature that indicates a need to potentially enter FR-P.2

A
  • 315 deg F
51
Q

Why is the ECCS termination criteria in FR-P.1 “Response to Imminent Pressurized Thermal Shock Condition” LESS restrictive than “NORMAL” termination criteria

A
  • To limit cooldown and allow for a faster reduction in RCS pressure
52
Q

What condition is necessary for a PTS concern to exist

A
  • Operator error (failure to terminate SI for greater than 30 mins when conditions are met to do so)
53
Q

While in FR-P.1 “Response to Imminent Pressurized Thermal Shock Condition”, when does the clock start on the “1 hour soak”

A
  • AFTER temperature is STABLE

- DO NOT LOWER temperature OR RAISE pressure during soak

54
Q

While in FR-P.1 “Response to Imminent Pressurized Thermal Shock Condition”, what is the cooldown limit after the 1 hour soak period

A
  • 50 deg F in 60 mins
55
Q

While in FR-P.1 “Response to Imminent Pressurized Thermal Shock Condition”, what action is taken IF RCS pressure is LESS THAN 300#

A
  • Check RHR flow GREATER THAN 400 gpm

- IF YES, THEN return to procedure and step in effect

56
Q

Is a cooldown or heatup more limiting for Pressurized Thermal Shock AND why

A
  • Cooldown

- Tensile stress on INNER WALL is additive to pressure stress

57
Q

What is the worst case Pressurized Thermal Shock event

A
  • SBLOCA w/ natural circ. cooldown (i.e., no RCPs running)
58
Q

Which part of the vessel is MOST susceptible to brittle fracture

A
  • Belt line welds
59
Q

While in FR-P.2 “Response to Anticipated PTS Condition”, what actions are taken with regards to cooldown

A
  • No soak time is required

- IF cooldown was GREATER THAN 100 deg/60 mins, THEN restore cooldown rate to LESS THAN 100 deg/60 mins

60
Q

What factors were considered in the development of the Pressurized Thermal Shock curve

A
  • Pressurized Thermal Shock
  • LTOP
  • RCS Safety Valves
61
Q

While in FR-P.2 “Response to Anticipated PTS Condition”, if ECCS is in service what actions is taken AND WHY

A
  • Return to procedure and step in effect

- There are higher priorities if SI has not been terminated prior to entering FR-P.2

0. Biennial Written Prep (12 decks)

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