EP- Intro

Question 1

What are the two EP’s which provide the entry points into the EP set?

Answer 1

1) IF a safety injection or reactor trip occurs or is required with initial conditions above P-11, the operator will enter EP/1,2/A/5000/E-0 (Reactor Trip or Safety Injection).
2) IF a complete loss of power on both emergency busses takes place, the operator will enter EP/1,2/A/5000/ECA-0.0 (Loss of All AC Power). This includes any time during the performance of any other EP.

Question 2

“Constrained Language” terms listed in OMP 4-3, Use of Abnormal and Emergency Procedures:

Answer 2

• Check - to determine present status. (no action)
• Ensure - to take necessary actions to guarantee that the component or reading is as specified. (Local actions in EPs and APs are only required if step specifies to dispatch personnel though).
• Faulted - refers to a steam generator that has a secondary break.
• Ruptured - refers to a steam generator that has a primary to secondary leak (SGTR).
• Implement - begin a required program or series of procedures.
• Intact - refers to a steam generator that is NOT faulted or ruptured and is available as a heat sink.
• GO TO - discontinue use of present procedure and stay in the referenced procedure. The referenced procedure is always entered at the first step unless otherwise specified.
• REFER TO, PER user is directed to a supplemental procedure/enclosure for actions but will remain in the controlling procedure.
• Stable - Maintained steady. IF a parameter is being controlled within a desired range, or if a slight trend in either direction is occurring, operator judgment may be used to determine if parameter is considered stable.
• Evaluate - Appraise the situation. Includes taking action based on evaluation.

Question 3

The six Status Trees are always evaluated in the sequence:

Answer 3

• Subcriticality
• Core Cooling
• Heat Sink
• Integrity
• Containment
• Inventory