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ACADs (08-006) Covered Keywords Description Supporting Material

Fire Protection. ACADs (08-006) Covered Keywords Description Supporting Material. NMF35 Fire Protection. PLANT STATUS. S top when unsure. A sk questions. F ollow procedures. E valuate your work area. T ake time to do it safely. Y ou can leave it better than you found it!.

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ACADs (08-006) Covered Keywords Description Supporting Material

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  1. Fire Protection ACADs (08-006) Covered Keywords Description Supporting Material

  2. NMF35 Fire Protection

  3. PLANT STATUS

  4. Stop when unsure Ask questions Follow procedures Evaluate your work area Take time to do it safely You can leave it better than you found it!

  5. What are the critical steps of the task I am going to perform? What document describes it? Do I understand it? What is the worst thing that can happen and how can I prevent it? What else could go wrong? What safety and/or radiation protection considerations? Is my training and are my qualifications up- to- date?

  6. COURSE TERMINAL OBJECTIVE Given a maintenance situation, the Maintenance Mechanic will describe the rework of Fire Protection system components. Mastery will be demonstrated by obtaining a score of 80% or more on an end of course examination.

  7. LESSON TERMINAL OBJECTIVE Without the aid of reference material, the Maintenance Mechanic will describe the safety precautions associated with the Fire Protection system, as well as the basic operation of the subsystems on which the Mechanic performs maintenance. Mastery will be demonstrated by obtaining a score of 80% or more on an end of course exam.

  8. LESSON ENABLING OBJECTIVES EO01 State the purpose of the Fire Protection system. EO02 State the purpose of fire barriers. EO03 List the subsystems of the Fire Protection system. EO04 List the safety precautions associated with working around Carbon Dioxide. EO05 List the areas protected by the Carbon Dioxide system. EO06 List the safety precautions associated with working around Halon 1301. EO07 List the areas protected by the Halon system. EO08 Describe the operation of the Filled Pipe system. EO09 Describe the operation of the Deluge system. EO10 Describe the operation of the Pre-Action system.

  9. EO01 State the purpose of the Fire Protection system. The purpose of the Fire Protection System is to provide fire suppression actuation and annunciation in the event of fire conditions or FP system actuation.

  10. EO02 State the purpose of fire barriers. The purpose of Fire Barriers is to divide the plant into isolable fire restricting areas.

  11. EO03 List the subsystems of the Fire Protection system. • Carbon Dioxide (CO2) • Halon • Water systems

  12. EO04 List the safety precautions associated with working around Carbon Dioxide. • Carbon Dioxide extinguishes a fire by displacing oxygen and by formation of heat removal. • Carbon dioxide can cause suffocation. Do not enter areas flooded with CO2. Use SCBA if entry is required. • Persons overcome by CO2 should be treated the same as drowning victims. CO2 discharge temperature may be as low as -110 degrees F and can cause severe skin damage.

  13. EO05 List the areas protected by the Carbon Dioxide system. Battery rooms - A, B, C, and D of all three units. ESF (Engineered Safety Features) Switchgear Rooms Non-Essential Switchgear rooms

  14. EO06 List the safety precautions associated with working around Halon 1301. • Halon Fire Protection system provides unique challenges due to the nature of the gas. • It replaces hydrogen atoms with halogen atoms. • Gas is Pressurized to 600 psig and requires caution during testing. No "odorizer" due to Halon's non-toxicity at low concentrations.

  15. Safe to breathe in concentrations less than 10% and periods less than 1 minute. • Decomposition occurs at approximately 900 degrees F which can produce harmful products. • Reentry after discharge should not be attempted without respiratory protection or until area has been properly vented.

  16. EO07 List the areas protected by the Halon system. • Rooms which are vulnerable to fire or water spray damage are: • Computer Rooms, 140'CB • Communication Room, 120'CB • Inverter Room, 120' CB • Remote Shutdown Rooms A & B, 100'CB

  17. EO08 Describe the operation of the Filled or Wet Pipe system.

  18. When a fire occurs, the heat produced will fuse a sprinkler causing water to flow. • Alarm valve clapper is opened by the flow and allows pressurized water to fill the retarding chamber.

  19. Flow overcomes the retarding chamber's small capacity drain and fills, thus increasing pressure, which closes the pressure switch and sounds an electric alarm bell. • Alarms will continue to sound as long as there is a flow of water in the system. water will flow until it is shut off manually. • Water flow must be manually reset.

  20. EO09 Describe the operation of the Deluge system. • The Deluge valve prevents water from entering the sprinkler piping until required; this then is termed a dry pipe system. • The deluge valve has three chambers, top Pressurized, outlet (normally dry) and inlet (pressurized).

  21. UPPER OUTLET INLET

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