Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

1. Systems > CTS and H2 Recombiners > Flashcards

CTS and H2 Recombiners Flashcards

1
Q

What is the purpose of the CTS system?

A
  • Limits post-accident containment pressure and temperature to less than design values of 12#
  • Removes radioactive elemental iodine from the containment atmosphere in the event of a DBA.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the purpose of the H2 Recombiner?

A
  • Recombines H2 and O2 to form steam
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the purpose of DIS?

A
  • The DIS eliminates hydrogen in the containment following a LOCA to prevent a detonation by period ignition of h2 mixtures
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the CTS pump starts?

A
  • Load Shed (W/ Phase B)
  • Phase B
  • Manual
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the CTS pump Trips?

A
  • Load Shed
  • Overload/Overcurrent
  • Manual
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What causes a CTS signal?

A
  • 2.8# (2/4)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What happens on a SAT low-low lvl?

A
  • SAT outlet valves close and eductor suction valves should have closed prior to the SAT Low Low lvl alarm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the CTS flow to upper ctmnt spray header?

A
  • 2000gpm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the CTS flow to lower ctmnt spray header?

A
  • 1200gpm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which CTS header does RHR feed and how much flow?

A
  • Upper ctmnt spray header only, and 2000gpm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the intended pH of the recirc sump due to CTS?

A
  • 7-10 pH

- want 8.5 pH to keep iodine in solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is added to the SAT to help remove radioactive iodine?

A
  • Sodium Hydroxide
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What do we use in the SAT to minimize moisture?

A
  • Nitrogen overpressure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Can the H2 Recombiners be started in modes 1-4?

A
  • Yes, but you have to declare the EDGs inoperable because it will over load the EDGs in the event of an SI with LOOP
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What powers the H2 recombiners?

A
  • 11/21 B

- 11/21 C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Will the CTS pump auto start on a Containment Spray Signal?

A
  • No
17
Q

Main Steam Isolation comes from with Ctmnt iso phase?

A
  • Phase B (Auto only)
18
Q

What will 2.8# in ctmnt cause?

A
  • Phase B
  • Ctmnt Spray Actuation
  • Steam Line Iso (auto only)
19
Q

What are the auto actions of a Ctmnt Spray Actuation?

A
  • CTS pump disch valves open
  • SAT outlet valves open
  • CTS Hx ESW outlet OPEN w/ recirc sump valves (ICM-305/306) open
20
Q

What are the H2 production sources?

A
  • Zirc (Clad) H20 reaction
  • Radiolytic decomp of H20
  • Corrosion of metals inside containment
21
Q

What is the purpose of the Spray Add educator?

A
  • Draws the NaOH solution from the SAT and mixes it with a portion of the CTS pump discharge flow
22
Q

What must be closed before you can open ICM-305 and 306?

A
  • IMO-310/320 closed

- IMO215/225 closed

23
Q

When do the ESW to CTS Hx outlet valves throttle open and to what flow?

A
  • Throttle open on a CTS Signal and ICM 305/306 open to 2400gpm
24
Q

What do the manual phase B switches actuate

A
  • Train specific phase B containment isolation
  • Train specific CTS
  • Train specific CVI
  • Starts CTS pump
25
Q

What does maintaining a pH of less than 10 prevent

A

Chloride and caustic stress corrosion cracking

26
Q

What are the capacity and NaOH concentration requirements for the SAT

A
  • 4000-4600 gal

- 30%-34% NaOH

27
Q

What temperature do the H2 Recombiners operate at

A

1200 deg F

28
Q

What temperature does DIS operate at

A

1700 deg F

29
Q

Explain the interlock associated with the CTS pump suction valves from the RWST

A
  • Normally open, interlocked with recirc sump suction valves so that only one source can be aligned at a time
30
Q

Explain the interlock associated with the CTS pump discharge valves

A
  • Normally closed, open automatically on a CTS signal
31
Q

Explain the interlocks associated with the SAT valves

A
  • SAT Isolation valves normally close, open on CTS signal
  • Eductor supply valves normally open
  • SAT Isolation AND educator supply valves auto close on lo-lo level in SAT
32
Q

Explain the interlock associated with the CTS Hx ESW outlet valves

A
  • Normally closed, open on CTS signal combined w/ recirc sump suction valves open
  • Must be opened manually if CTS signal is reset before recirc sump valves are opened.

1. Systems (56 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions