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Advanced Systems > Containment Building > Flashcards

Containment Building Flashcards

1
Q

LCO 3.3.3 “ESF Instrumentation” requirement

A

4 ESF bistables and associated instrument channels for CHP (3.7-4.3 psig) and CHR (<= 20 R/hr) shall be operable.

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2
Q

LCO 3.3.3 “ESF Instrumentation” applicability for CHP/CHR

A

Modes 1-4

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3
Q

LCO 3.3.4 “ESF Logic and Manual Initiation” requirement

A

2 ESF manual and 2 ESF actuation logic channels and associated bypass removal channels shall be operable for CHP and CHR.

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4
Q

LCO 3.3.4 “ESF Logic and Manual Initiation” applicability for CHP/CHR

A

Modes 1-4

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5
Q

LCO 3.3.6 “Refueling CHR Instrumentation” requirement

A

2 refueling CHR auto actuation function channels and 2 CHR manual actuation function channels shall be operable.

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6
Q

LCO 3.3.6 “Refueling CHR Instrumentation” applicability

A

During core alterations and during movement of irradiated fuel assemblies within containment

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7
Q

LCO 3.3.6 “Refueling CHR Instrumentation” required actions if 1 or more functions with 2 channels inoperable

A

IMMEDIATELY suspend core alterations and movement of irradiated fuel assemblies within containment

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8
Q

LCO 3.3.7 “PAM Instrumentation” requirement

A

The PAM Instrumentation for Containment Pressure (Wide Range, 2 channels req’d), Containment Isolation Valve Position (1 per valve), and Containment Area Radiation Monitor (High Range) shall be operable

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9
Q

LCO 3.3.7 “PAM Instrumentation” applicability

A

Modes 1-3

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10
Q

LCO 3.6.1 “Containment” requirement

A

Containment shall be operable

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11
Q

LCO 3.6.1 “Containment” applicability

A

Modes 1-4

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12
Q

LCO 3.6.1 “Containment” required actions if containment is inoperable

A

WITHIN 1 HOUR, restore containment to operable status.

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13
Q

LCO 3.6.2 “Containment Air Locks” requirement

A

2 containment air locks shall be operable

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14
Q

LCO 3.6.2 “Containment Air Locks” applicability

A

Modes 1-4

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15
Q

LCO 3.6.2 “Containment Air Locks” notes/exceptions

A
  • Entry/exit is permissible through a “locked” air lock door to perform repairs on the affected air lock components
  • Separate condition entry is allowed for each air lock
  • Enter applicable conditions and required actions of LCO 3.6.1 “Containment” when leakage results in exceeding the overall containment leakage rate acceptance criteria
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16
Q

LCO 3.6.2 “Containment Air Locks” required actions if 1 or more air locks with 1 or more air lock door inoperable

A

WITHIN 1 HOUR verify the operable door is closed in the affected air lock

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17
Q

LCO 3.6.2 “Containment Air Locks” required actions if 1 or more air locks with interlock mechanism inoperable

A

WITHIN 1 HOUR verify an operable door is closed in the affected air lock

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18
Q

LCO 3.6.2 “Containment Air Locks” required actions if 1 or more air locks inoperable for reasons other than a door or interlock mechanism inoperable

A

IMMEDIATELY initiate action to evaluate overall containment leakage rate per LCO 3.6.1
AND
WITHIN 1 HOUR verify a door is closed in the affected air lock.

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19
Q

LCO 3.6.3 “Containment Isolation Valves” requirement

A

Each containment isolation valve shall be operable

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20
Q

LCO 3.6.3 “Containment Isolation Valves” applicability

A

Modes 1-4

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21
Q

LCO 3.6.3 “Containment Isolation Valve” notes/exceptions

A
  • penetration flow paths, except for 8” purge exhaust valves and 12” air room supply valves penetration flow paths, may be unisolated intermittently under admin controls
  • separate condition entry is allowed for each penetration flow path
  • enter applicable conditions and required actions for system(s) made inoperable by containment isolation valves
  • enter applicable conditions and required actions of LCO 3.6.1 “Containment” when leakage results in exceeding overall containment leakage rate acceptance criteria
22
Q

LCO 3.6.3 “Containment Isolation Valves” required actions if 1 or more penetration flow paths with 2 isolation valves inoperable (except for purge exhaust valve or air room supply valve not locked closed)

A

WITHIN 1 HOUR isolate the affected penetration flow path by use of at least 1 closed and de-activated automatic valve, closed manual valve, or blind flange

23
Q

LCO 3.6.3 “Containment Isolation Valves” required actions if 1 or more purge exhaust or air room supply valves not locked closed

A

WITHIN 1 HOUR lock closed the affected valves

24
Q

LCO 3.6.4 “Containment Pressure” requirement

A

Containment pressure shall be <= 1 psig in Modes 1-2, and <= 1.5 psig in Modes 3-4

25
Q

LCO 3.6.4 “Containment Pressure” applicability

A

Modes 1-4

26
Q

LCO 3.6.4 “Containment Pressure” required actions if containment pressure not within limit

A

WITHIN 1 HOUR restore containment pressure to within limit

27
Q

LCO 3.6.5 “Containment Air Temperature” requirement

A

Containment average air temperature shall be <= 140 F

28
Q

LCO 3.6.5 “Containment Air Temperature” applicability

A

Modes 1-4

29
Q

LCO 3.9.3 “Containment Penetrations” requirement

A
  • equipment hatch closed and held in place by 4 bolts (only required to be closed when fuel handling area ventilation system is not in compliance with LCO 3.7.12)
  • 1 door in the personnel air lock closed (only required when the equipment hatch is closed)
  • 1 door in the emergency air lock closed
  • each penetration providing direct access from containment atmosphere to outside atmosphere either closed by a manual or auto isolation valve, blind flange, or equivalent; or capable of being closed by an operable refueling CHR signal
30
Q

LCO 3.9.3 “Containment Penetrations” applicability

A

During core alterations and during movement of irradiated fuel assemblies within containment

31
Q

LCO 3.9.3 “Containment Penetrations” required actions if 1 or more containment penetrations not in required status

A

IMMEDIATELY suspend core alterations and movement of irradiate fuel assemblies within containment

32
Q

What are containment building design features/specs?

A
  • capable of withstanding the internal pressure from a DBA with no loss of integrity.
  • designed to allow a leak rate of no more than 0.1 weight percent/day at 55 psig and 283 F.
33
Q

What are design features of the air locks that help ensure containment integrity?

A
  • doors open into containment, so during an accident, high containment pressure will force the doors closed to aid in isolation.
  • doors are interlocked so only 1 can be opened at a time so there can’t be a “hole” in containment.
  • designed such that 1 door can withstand containment design pressure
34
Q

What is the admin limit on containment temperature?

A

130 F with TE-1815

135.96 with PPC

35
Q

What is the tech spec limit on containment temperature?

A

140 F

36
Q

What controls containment temperature?

A

Containment Air Coolers

37
Q

What is the admin limit on containment pressure?

A

Modes 1-2 - < 0.85 psig

Modes 3-5 - 1.35 psig

38
Q

What is the tech spec limit on containment pressure?

A

Modes 1-2 - < 1 psig

Modes 3-4 - < 1.5 psig

39
Q

How is containment pressure maintained?

A

Vented through ‘D’ CWRT to the stack through either the exhaust plenum or VGCH.

40
Q

Containment humidity relationship

A
  • humidity is a function of temperature, so as temperature goes up, so does humidity
  • a 10% step increase in humidity equates to 150 gallons of primary water leakage
41
Q

What are the 2 types of containment isolation devices?

A

Passive and active

42
Q

What are examples of passive containment isolation devices?

A
  • manual valves
  • de-activated automatic valves
  • blind flanges
  • closed systems
  • personnel and emergency escape air locks
43
Q

What are examples of active containment isolation devices?

A

Check valves or other automatic devices designed to close without operator action

44
Q

What actuates CHP?

A
  • Containment pressure 3.7-4.3 (4) psig

- 2/4 logic on either channel

45
Q

What equipment actuates on CHP?

A
  • closes containment isolation valves
  • CRHVAC goes to emergency mode
  • receive “containment isolation” alarm
  • SIS
  • “arms” containment spray pumps. Pumps will start on SIS with a CHP signal
46
Q

What is required to reset CHP?

A
  • CHP has a seal in circuit
  • can be reset if 3/4 channels < 3 psig
  • EOP gives directions to reset
47
Q

What happens to CHP actuated equipment when CHP is reset?

A

All valves stay in CHP position except:

  • CCW to/from containment
  • feedwater isolations
  • containment spray CVs return to HS postion (normally closed). Precaution to be careful as to not dead head the spray pumps and thermal shock components because of this
48
Q

How do we re-position valves that don’t automatically re-position when CHP is reset?

A

control switch needs to be taken to “closed” before they can be re-opened

49
Q

What actuates CHR?

A
  • 10 R/hr on any 2 of 4 containment rad monitors will result in both trains actuating
  • 80 mR/hr above background on either containment refueling rad monitor (will not receive high rad alarm)
50
Q

What equipment actuates on CHR?

A
  • Containment isolation valves close except MSIVs, MFRVs, MFRV bypasses, and CCW to/from containment
  • CRHVAC goes to emergency mode
  • receive “containment isolation” alarm
  • ESS sump pumps won’t auto pump down
51
Q

What happens to CHR actuated equipment when CHR is reset?

A

Valves will not re-position automatically

Advanced Systems (36 decks)

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