JPM IP-i — Shed Non-Essential DC Loads IAW EOP-LOPA-1
In-Plant | RO/SRO | EPE 055 EA1.04 (3.5/3.9)
Location: In-Plant (NOT inside RCA)
Time-Critical: No
Alternate Path: No
Estimated Time: 15 minutes
Initial Conditions:
- Salem Unit 2 has experienced a total Loss of All AC Power.
- The control room is performing actions in 2-EOP-LOPA-1, Loss of All AC Power.
Initiating Cue:
- You are directed to shed non-essential DC loads using 2-EOP-LOPA-1, Checkoff Sheet 3, 125VDC LOAD SHED LIST pages 1-3 (COS 3-1 thru 3-3).
Time-Critical: No
Alternate Path: No
Estimated Time: 15 minutes
Initial Conditions:
- Salem Unit 2 has experienced a total Loss of All AC Power.
- The control room is performing actions in 2-EOP-LOPA-1, Loss of All AC Power.
Initiating Cue:
- You are directed to shed non-essential DC loads using 2-EOP-LOPA-1, Checkoff Sheet 3, 125VDC LOAD SHED LIST pages 1-3 (COS 3-1 thru 3-3).
Task Standard:
Locate DC panels and simulate opening only associated DC breakers listed on Checkoff Sheet 3.
Locate DC panels and simulate opening only associated DC breakers listed on Checkoff Sheet 3.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| COS 3 * | Locate distribution panels and open DC breakers IAW Checkoff Sheet 3 — 64 ft elevation | Locates the following distribution panels: 2A 125VDC bus, 2ADC 125VDC Distribution Panel, 2B 125VDC Bus, 2DDC 125VDC Distribution Panel, 2CDC 125VDC Distribution Panel. Simulates opening only the breakers listed on Checkoff Sheet 3 (not all breakers in each panel). |
| COS 3 * | Locate distribution panels and open DC breakers IAW Checkoff Sheet 3 — 100 ft elevation switchgear room | Locates the following distribution panels in 100 ft elevation switchgear room: 2AADC 125VDC Distribution Panel, 2BBDC 125VDC Distribution Panel, 2CCDC 125VDC Distribution Panel. Simulates opening only the breakers listed on Checkoff Sheet 3. |
Key Decision Point:
This JPM tests the applicant's ability to navigate the plant and locate multiple 125VDC distribution panels across two elevations (64 ft and 100 ft) during a station blackout. The key discrimination is that the operator must open ONLY the specific breakers designated on Checkoff Sheet 3 — not every breaker in each panel. The Checkoff Sheet sections may be performed in any order. Labeling discrepancies exist in the field: 2ADC3AX29 is labeled as "Source #1 125 VDC to AVR Excitation Cab" rather than "2 Generator Exciter Voltage Regulator," and 2DDC2AX28 "Safety Injection Test Line Valves" is labeled as "21SJ162, 2SJ166, 22SJ162, 22SJ166, 2SJ158." The operator must correctly identify the breakers despite these labeling differences.
This JPM tests the applicant's ability to navigate the plant and locate multiple 125VDC distribution panels across two elevations (64 ft and 100 ft) during a station blackout. The key discrimination is that the operator must open ONLY the specific breakers designated on Checkoff Sheet 3 — not every breaker in each panel. The Checkoff Sheet sections may be performed in any order. Labeling discrepancies exist in the field: 2ADC3AX29 is labeled as "Source #1 125 VDC to AVR Excitation Cab" rather than "2 Generator Exciter Voltage Regulator," and 2DDC2AX28 "Safety Injection Test Line Valves" is labeled as "21SJ162, 2SJ166, 22SJ162, 22SJ166, 2SJ158." The operator must correctly identify the breakers despite these labeling differences.
Ref: 2-EOP-LOPA-1 (R31) | Task: N1150140501 | K/A: EPE 055 EA1.04 — Ability to operate and/or monitor the following as they apply to Station Blackout: emergency generators | Source: Modified | View JPM PDF
Connections
- Related systems: DC Power, 4KV
- Related EOPs: EOP-LOPA-1 — Loss of All AC Power
- Related exam: 2018 NRC Operating Exam