- Shuffle
Toggle OnToggle Off
- Alphabetize
Toggle OnToggle Off
- Front First
Toggle OnToggle Off
- Both Sides
Toggle OnToggle Off
Front
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
PLAY BUTTON
PLAY BUTTON
9 Cards in this Set
- Front
- Back
|
What is the purpose of the Containment Spray System?
|
Ans.: Containment heat removal and reduction of off-site radiation doses.
|
|
What is the purpose of the Containment Cooling System?
|
Ans.: Maintain suitable atmosphere for equipment during normal plant operation and subsequent to DBA within Containment, cool Containment and hence limit pressure to reduce Containment leakage of airborne and gaseous radioactivity to the environment.
|
|
What chemical compound is injected into the Containment spray water?
|
Ans.: NaOH (sodium hydroxide)
|
|
What is the interrelationship between spray additive tank level and the spray additive tank to eductor isolation valves (EN HV-15 and 16)?
|
Ans.: Low level (16%) completes permissive allowing the spray additive tank to eductor isolation valves to be closed by operator with a CSAS present. Low-Low level (5%) automatically closes spray additive tank to eductor isolation valves.
|
|
When verifying level in the spray additive tank is greater than the required minimum, which level instrument should be used?
|
Ans.: Local sight glass
|
|
An earthquake has resulted in a DBA inside Containment and a simultaneous loss of site power. Containment pressure has increased to 40 psig. Will the Containment spray pumps have to be manually started? Explain why or why not
|
Ans.: No, the spray pumps will receive a start signal at 15 seconds from the LOCA sequencer.
|
|
What are the advantages of injecting sodium hydroxide into the Containment spray?
|
Ans.: Basic pH and fine mist reduce off-site radiation levels by: * Absorbing iodine during spray * Retaining iodine during recirculation. Basic pH helps prevent excessive chloride stress corrosion cracking. Basic pH results in acceptable hydrogen generation rates within Containment.
|
|
What is the minimum pH expected in the Containment sump following a DBA and activation of Containment spray?
|
Ans.: 8.5
|
|
What is the expected range of pH in the spray fluid following a DBA and activation of Containment spray?
|
Ans.: 9.0 to 11.0
|
