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Questions and Answers
Explain the purpose of the desuperheater in the context of the 100 psig Steam System, and briefly describe how it functions.
Explain the purpose of the desuperheater in the context of the 100 psig Steam System, and briefly describe how it functions.
The desuperheater reduces the temperature of the superheated 400 psig steam by injecting water. The water cools the steam and turns into more steam, which is then used for other purposes in the 100 psig steam system.
Describe the flow path of the 400 psig steam condensate, starting from its collection point and ending at its final destination as described in the text.
Describe the flow path of the 400 psig steam condensate, starting from its collection point and ending at its final destination as described in the text.
400 psig steam condensate is gathered in the 400 psig steam condensate header, then routed to D-565.
Explain why 400 psig steam is used to heat the R-201-205 reactors, particularly when exothermic reactions are not occurring within the reactor coil.
Explain why 400 psig steam is used to heat the R-201-205 reactors, particularly when exothermic reactions are not occurring within the reactor coil.
400 psig steam is used to build and maintain reactor shell pressure and temperature in R-201-205 during periods when exothermic reactions are not happening in the reactor coil.
Trace the flow of condensate from D-561 (Reactor Water Surge Drum), R-201-205 reactors, D-566 (60 psig Steam Drum), and D-567 to its final release point, naming the equipment involved.
Trace the flow of condensate from D-561 (Reactor Water Surge Drum), R-201-205 reactors, D-566 (60 psig Steam Drum), and D-567 to its final release point, naming the equipment involved.
Describe the function of the internal demister pad in D-562 (Reactor Water Blow Down Drum) and explain its location within the drum.
Describe the function of the internal demister pad in D-562 (Reactor Water Blow Down Drum) and explain its location within the drum.
Flashcards
Superheated Steam
Superheated Steam
Steam heated above its boiling point.
Desuperheater
Desuperheater
A device that injects water into superheated steam to cool it and create more steam.
D-561 (Reactor Water Surge Drum)
D-561 (Reactor Water Surge Drum)
Receives sparger steam, provides hot boiler feed water to reactor shells.
D-562 (Reactor Water Blow Down Drum)
D-562 (Reactor Water Blow Down Drum)
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Z-562 (Silencer)
Z-562 (Silencer)
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Study Notes
- 400 psig steam is imported as superheated steam from Unit 1092.
- The steam is routed through a desuperheater to the 100 psig Steam System as makeup steam.
- Superheated steam is heated higher than its boiling point.
- A desuperheater injects water into superheated steam to cool it.
- The injected water heats to boiling, creating more steam.
- 400 psig steam is routed to E-425, E-403, E-443, and E-615 as a heating medium.
- 400 psig steam condensate is collected in the 400 psig steam condensate header and routed to D-565.
- 400 psig steam is routed to R-201-205 to build and maintain reactor shell pressure and temperature under normal conditions.
- 400 psig steam is routed to D-561 (Reactor Water Surge Drum) to heat up boiler feed water before filling R-201-205 shells.
- Condensate from D-561, R-201-205, D-566 (60 psig Steam Drum), and D-567 is routed to D-562 (Reactor Water Blowdown Drum).
- Steam from D-562 is released to the atmosphere through Z-562 (Silencer).
D-561 (Reactor Water Surge Drum)
- D-561 (11’6” x 76’L) receives sparger steam from the 400 psig Steam System.
- It then routes hot boiler feedwater to R-201-205 shells.
- 400 psig steam enters the side of the drum.
- Steam exits the top of the drum, while water exits the bottom.
D-562 (Reactor Water Blow Down Drum)
- D-562 (7’D x 10’L) has an internal demister pad installed below the top vapor outlet.
- Its purpose is to receive condensate from the system.
- Condensate enters on the sides of the drum.
- Condensate is drained from the bottom of the drum.
- Vapor is released from the top of the drum.
Z-562 (Silencer)
- Industrial silencers absorb or redirect sound waves.
- They use multiple chambers and perforated tubes to bounce sound waves back to the source.
- Some silencers contain fibrous absorption material to convert acoustic energy into heat energy.
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