JPM IP-i — Locally Control Charging Flow IAW S2.OP-AB.CR-0001
In-Plant (RCA) | RO/SRO | APE 068 AA1.22 (4.0/4.3)
Location: In-Plant — Unit 2 RCA (Panel 216-1, Chg Pmps FL & PR Inst Pnl)
Time-Critical: No
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- The Unit 2 Control Room has been evacuated in accordance with S2.OP-AB.CR-0001, Control Room Evacuation.
- A reactor trip from 100% was initiated prior to evacuating the Control Room.
Initiating Cue:
- You are directed to take local control of charging flow IAW S2.OP-AB.CR-0001, Control Room Evacuation, Attachment 5, starting at Step 8.0 (see attached page).
- Steps 1.0-7.0 of Attachment 5 have been completed.
Time-Critical: No
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- The Unit 2 Control Room has been evacuated in accordance with S2.OP-AB.CR-0001, Control Room Evacuation.
- A reactor trip from 100% was initiated prior to evacuating the Control Room.
Initiating Cue:
- You are directed to take local control of charging flow IAW S2.OP-AB.CR-0001, Control Room Evacuation, Attachment 5, starting at Step 8.0 (see attached page).
- Steps 1.0-7.0 of Attachment 5 have been completed.
Task Standard:
1. Locally controls Charging flow using hand air operator IAW S2.OP-AB.CR-0001
2. Correctly adjusts air operator to change charging flow to the desired flow of 70 gpm.
1. Locally controls Charging flow using hand air operator IAW S2.OP-AB.CR-0001
2. Correctly adjusts air operator to change charging flow to the desired flow of 70 gpm.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 8.0 | TAKE control of 2CV55, Cent Chg Pmp Flow Cont Valve | Proceeds to Unit 2 Panel 216-1, Chg Pmps FL & PR Inst Pnl. |
| 8.1 | RECORD the charging flow as indicated on 2FI-128A | Records charging flow from 2FI-128A, Charging Pump Flow Indication (typically around 90 gpm). |
| 8.2 * | PLACE local E/P Bypass Line Selector Valve in Manual | Locates local E/P Bypass Selector Valve and simulates rotating valve (clockwise) to MAN position. |
| 8.3 | Using the MANUAL hand air operator, ENSURE that the flow rate as noted in Step 8.1 is being maintained with 2CV55 | Reads flowrate from 2FI-128A (labeled 2FT-128A on panel), Charging Pump Flow Indication, to ensure flow rate is maintained with 2CV55. |
| * | Adjust charging flow using hand air operator to 70 gpm | Simulates rotating hand air operator in the clockwise direction to RAISE air pressure to LOWER charging flow to 70 gpm. 2CV55 fails open on loss of air — raising air pressure closes the valve (lowers flow); decreasing air pressure opens the valve (raises flow). |
Key Decision Point:
The discriminating step is the hand air operator adjustment — the applicant must understand that 2CV55 is a fail-open (air-to-close) valve. Rotating the hand air operator CLOCKWISE raises air pressure, which CLOSES the valve and LOWERS charging flow. If the applicant rotates counter-clockwise (lowering air pressure), flow increases instead of decreasing. The evaluator cue confirms: if rotated counter-clockwise, charging flow increases to 100 gpm.
The discriminating step is the hand air operator adjustment — the applicant must understand that 2CV55 is a fail-open (air-to-close) valve. Rotating the hand air operator CLOCKWISE raises air pressure, which CLOSES the valve and LOWERS charging flow. If the applicant rotates counter-clockwise (lowering air pressure), flow increases instead of decreasing. The evaluator cue confirms: if rotated counter-clockwise, charging flow increases to 100 gpm.
Ref: S2.OP-AB.CR-0001 (R23) | Task: 1130070501 | K/A: APE 068 AA1.22 — Ability to operate and/or monitor the following as they apply to the Control Room Evacuation: Flow control valve for RCS charging header | Source: Modified | View JPM PDF
Connections
- Related systems: CVCS, Control Air
- Related procedures: AB.CR-0001 — Control Room Evacuation
- Related exam: 2020 NRC Operating Exam