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Flashcards in CRHV Tech Specs Deck (16):
1

3.7.10 Control Room Ventilation (CRV) Filtration

3.7.10 Control Room Ventilation (CRV) Filtration

Two CRV Filtration trains shall be OPERABLE

APPLICABILITY

  • Modes 1, 2, 3, 4
  • During Core Alterations
  • During movement of irradiated fuel assemblies
  • During movement of fuel cask in or over Spent Fuel Pool

2

What are the 'A' actions of 3.7.10 Control Room Ventilation (CRV) Filtration

If one CRV Filtration Train inoperable – restore to operable status within 7 days

3

What are the 'B' actions of 3.7.10 Control Room Ventilation (CRV) Filtration

If one or more CRV Filtration Trains inoperable due to an inoperable CRE Boundary in MODE 1,2,3,4, then:

  • IMMEDIATELY Initiate action to implement mitigating actions. AND
  • Verify mitigating actions ensure CRE occupant radiological exposures will not exceed limits, and CRE occupants are protected from chemical and smoke hazards within 24 hours AND
  • Restore CRE boundary to OPERABLE status within 90 days

4

What are the 'C' actions of 3.7.10 Control Room Ventilation (CRV) Filtration

Required Action and associated Completion Time of Condition A or B not met in MODE 1, 2, 3, or 4. then:

Be in Mode 3 within 6 hours and Mode 5 within 36 hours

5

What are the 'D' actions of 3.7.10 Control Room Ventilation (CRV) Filtration

Required Action and associated Completion Time of Condition A not met during CORE ALTERATIONS, during movement of irradiated fuel assemblies, or during movement of a fuel cask in or over the SFP, then IMMEDIATELY:

Place operable CRV Filtration Train in Emergency Mode OR

Suspend Core Alterations AND

  • Suspend movement of irradiated fuel assemblies AND
  • Suspend movement of a fuel cask over the Spent Fuel Pool

6

What are the 'E' actions of 3.7.10 Control Room Ventilation (CRV) Filtration

Two CRV Filtration trains inoperable during CORE ALTERATIONS, during movement of irradiated fuel assemblies, or during movement of a fuel cask in or over the SFP OR One or more CRV Filtration trains inoperable due to an inoperable CRE boundary during CORE ALTERATIONS, during movement of irradiated fuel assemblies, or during movement of a fuel cask in or over the SFP then IMMEDIATELY

  • Suspend Core Alterations AND
  • Suspend movement of irradiated fuel assemblies AND
  • Suspend movement of a fuel cask over the Spent Fuel Pool

7

What are the 'F' actions of 3.7.10 Control Room Ventilation (CRV) Filtration

If Two CRV Filtration Trains are inoperable during Modes 1, 2, 3, or 4 other than condition B then IMMEDIATELY enter LCO 3.0.3.

8

What makes a train of control room ventilation filtration operable?

A CRV Filtration train is considered OPERABLE when the associated:

  • Main recirculation fan and emergency filter fan are OPERABLE;
  • HEPA filters and charcoal absorber are not excessively restricting flow, and are capable of performing their filtration functions; and
  • Required heater, ductwork, valves, and dampers are OPERABLE, and air circulation can be maintained.

CRE needs to operable as well.

9

What makes the Control Room Envelope Operable?

In order for the CRE boundary to be considered OPERABLE

unfiltered air in-leakage past the CRE boundary and into the CRE must be less than the allowable value as determined by analyses of the DBA consequences. 

When unfiltered air in-leakage is greater than the assumed flow rate, Condition B must be entered. 

Unfiltered air in-leakage is air flow past the CRE boundary and any instrument or service air line leaks inside the CRE boundary.

10

What is 3.7.11 Control Room Ventilation (CRV) Cooling?

3.7.11 Control Room Ventilation (CRV) Cooling

Two CRV Cooling Train shall be operable

APPLICABILITY

  • Modes 1, 2, 3, 4
  • During Core Alterations
  • During movement of irradiated fuel assemblies
  • During movement of fuel cask in or over the Spent Fuel Pool

 

11

 What are the 'A' Actions associated with 3.7.11 Control Room Ventilation (CRV) Cooling?

If one CRV Cooling Train is inoperable – then restore to operable status within 30 days

12

 What are the 'B' Actions associated with 3.7.11 Control Room Ventilation (CRV) Cooling?

3.7.11 B Actions

If in Mode 1-4 and inoperable CRV Cooling Train is NOT restored to operable within 30 days then be in Mode 3 within 6 hours and Mode 5 within 36 hours

13

 What are the 'C' Actions associated with 3.7.11 Control Room Ventilation (CRV) Cooling?

3.7.11 Control Room Ventilation (CRV) Cooling - C Actions

Required Action and associated Completion Time of Condition A not met during Core Alterations, movement of irradiated fuel assemblies, or movement of fuel cask over Spent Fuel Pool, then IMMEDIATELY:

Place operable CRV Cooling Train in operation OR

  • Suspend Core Alterations AND
  • Suspend movement of irradiated fuel assemblies AND
  • Suspend movement of a fuel cask over the Spent Fuel Pool

14

 What are the 'D' Actions associated with 3.7.11 Control Room Ventilation (CRV) Cooling?

3.7.11 Control Room Ventilation (CRV) Cooling - D Actions

If Two CRV Cooling Trains are inoperable during Core Alterations, movement of irradiated fuel assemblies, or movement of fuel cask over Spent Fuel Pool are in progress then IMMEDIATELY

  • Suspend Core Alterations AND
  • Suspend movement of irradiated fuel assemblies AND
  • Suspend movement of a fuel cask over the Spent Fuel Pool

15

 What are the 'E' Actions associated with 3.7.11 Control Room Ventilation (CRV) Cooling?

3.7.11 Control Room Ventilation (CRV) Cooling - E Actions

If two CRV Cooling Trains are inoperable during Modes 1, 2, 3, or 4 then IMMEDIATELY enter LCO 3.0.3.

16

What is the basis for 3.7.11 Control Room Ventilation (CRV) Cooling?

The CRV Cooling is considered OPERABLE when the individual components that are necessary to maintain the control room temperature are OPERABLE in both trains.

These components include the condensing units, fans, and associated temperature control instrumentation.

In addition, the CRV Cooling must be OPERABLE to the extent that air circulation can be maintained.