JPM SRO-A5 — Classify Event and Complete/Approve ICMF
Admin | SRO | G2.4.41 (4.6)
Location: Classroom
Time-Critical: Yes
Alternate Path: No
Estimated Time: 8 minutes
Initial Conditions:
- Unit 2 experienced a Large Break LOCA and an Automatic Safety Injection (SI).
- All available equipment started following SI signal.
- An ALERT was declared based on EAL# RB1.L, Loss of the Reactor Coolant System Barrier.
- The Emergency Core Cooling System (ECCS) is currently aligned for Cold Leg Recirculation IAW EOP-LOCA-3.
- The crew is responding to the following alarms and indications:
- OHA C-26, 21 RHR SUMP OVRFLO
- Auxiliary Typewriter alarm point; 21 RHR Sump Pump start
- 2R41D, Plant Vent Radiation Monitor, indicating 3.18E+05 µCi/sec and rising
- The crew responded to the alarms/indications by closing the 21SJ44, Containment Sump Suction Valve, to isolate the leak but the valve failed to close.
- The OCC is briefing a field team to investigate the breaker associated for the 21SJ44 valve.
- The 2R44A and 2R44B, Containment High Range Radiation Monitors, are currently reading 305 R/Hr.
- The 2R41D, Plant Vent Radiation Monitor, is currently reading 5.12E+6 µCi/sec and rising.
- Met Tower data indicates wind from 180 degrees at 5 mph.
Initiating Cue:
You are the Emergency Coordinator (EC).
CLASSIFY the event AND COMPLETE / APPROVE the ICMF IAW the applicable procedure.
THIS IS A TIME CRITICAL JPM.
Time-Critical: Yes
Alternate Path: No
Estimated Time: 8 minutes
Initial Conditions:
- Unit 2 experienced a Large Break LOCA and an Automatic Safety Injection (SI).
- All available equipment started following SI signal.
- An ALERT was declared based on EAL# RB1.L, Loss of the Reactor Coolant System Barrier.
- The Emergency Core Cooling System (ECCS) is currently aligned for Cold Leg Recirculation IAW EOP-LOCA-3.
- The crew is responding to the following alarms and indications:
- OHA C-26, 21 RHR SUMP OVRFLO
- Auxiliary Typewriter alarm point; 21 RHR Sump Pump start
- 2R41D, Plant Vent Radiation Monitor, indicating 3.18E+05 µCi/sec and rising
- The crew responded to the alarms/indications by closing the 21SJ44, Containment Sump Suction Valve, to isolate the leak but the valve failed to close.
- The OCC is briefing a field team to investigate the breaker associated for the 21SJ44 valve.
- The 2R44A and 2R44B, Containment High Range Radiation Monitors, are currently reading 305 R/Hr.
- The 2R41D, Plant Vent Radiation Monitor, is currently reading 5.12E+6 µCi/sec and rising.
- Met Tower data indicates wind from 180 degrees at 5 mph.
Initiating Cue:
You are the Emergency Coordinator (EC).
CLASSIFY the event AND COMPLETE / APPROVE the ICMF IAW the applicable procedure.
THIS IS A TIME CRITICAL JPM.
Task Standard:
1. Classifies the event as a General Emergency (GE) 13 points based on RB1.L or RB2.L (5 pts), FB2.L (5 pts), and CB2.L (3 pts) or CB3.L (3 pts) within 15 minutes.
2. Correctly completes sections I thru V of the ICMF IAW with attached answer key for the classified event within 15 minutes from event declaration.
1. Classifies the event as a General Emergency (GE) 13 points based on RB1.L or RB2.L (5 pts), FB2.L (5 pts), and CB2.L (3 pts) or CB3.L (3 pts) within 15 minutes.
2. Correctly completes sections I thru V of the ICMF IAW with attached answer key for the classified event within 15 minutes from event declaration.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 1 * | CLASSIFY the event | General Emergency (GE) — 13 points: - RB1.L or RB2.L (5 pts): RCS Barrier lost (Large Break LOCA, ECCS in cold leg recirc) - FB2.L (5 pts): Fuel Barrier lost (2R44A/B reading 305 R/Hr — containment high range rad monitors indicate fuel damage) - CB2.L or CB3.L (3 pts): Containment Barrier lost/potentially lost (21SJ44 failed to close — unisolable leak outside containment, 2R41D reading 5.12E+6 µCi/sec and rising) Must classify within 15 minutes. |
| 2 * | COMPLETE / APPROVE the ICMF | Selects EP-SA-325-F4 (Attachment 4 — General Emergency). Correctly fills out Sections I thru V including: station identification, emergency classification as GE, declaration time, event description, release status (IN PROGRESS — due to unisolable containment sump leak path via failed 21SJ44 and elevated 2R41D readings), meteorological data (wind from 180 degrees at 5 mph), and protective action recommendations. Must complete within 15 minutes from event declaration. |
Fission Product Barrier Assessment:
RCS Barrier (5 pts): RB1.L — Loss of RCS barrier. Large Break LOCA with ECCS in cold leg recirculation (EOP-LOCA-3) confirms RCS integrity has been lost.
Fuel Barrier (5 pts): FB2.L — Loss of Fuel barrier. Containment High Range Radiation Monitors (2R44A/B) reading 305 R/Hr indicates significant fuel damage.
Containment Barrier (3 pts): CB2.L or CB3.L — Loss or potential loss of Containment barrier. 21SJ44 (Containment Sump Suction Valve) failed to close, creating an unisolable leak path outside containment. 2R41D (Plant Vent Rad Monitor) at 5.12E+6 µCi/sec and rising confirms radioactivity is being released.
Total: 13 points = General Emergency (escalated from ALERT).
RCS Barrier (5 pts): RB1.L — Loss of RCS barrier. Large Break LOCA with ECCS in cold leg recirculation (EOP-LOCA-3) confirms RCS integrity has been lost.
Fuel Barrier (5 pts): FB2.L — Loss of Fuel barrier. Containment High Range Radiation Monitors (2R44A/B) reading 305 R/Hr indicates significant fuel damage.
Containment Barrier (3 pts): CB2.L or CB3.L — Loss or potential loss of Containment barrier. 21SJ44 (Containment Sump Suction Valve) failed to close, creating an unisolable leak path outside containment. 2R41D (Plant Vent Rad Monitor) at 5.12E+6 µCi/sec and rising confirms radioactivity is being released.
Total: 13 points = General Emergency (escalated from ALERT).
Key Decision Point:
The candidate must escalate from the existing ALERT to a General Emergency by performing a three-barrier assessment using the ECG books. The critical recognition is that all three fission product barriers are lost or potentially lost: (1) RCS lost from the LBLOCA, (2) fuel cladding lost per high containment radiation readings, and (3) containment lost/potentially lost because the 21SJ44 valve failed to close, allowing an unisolable leak path outside containment with confirmed elevated Plant Vent radiation. A release IS in progress (2R41D elevated and rising). The ICMF must correctly identify this as a GE with a release in progress and use Attachment 4 (EP-SA-325-F4).
The candidate must escalate from the existing ALERT to a General Emergency by performing a three-barrier assessment using the ECG books. The critical recognition is that all three fission product barriers are lost or potentially lost: (1) RCS lost from the LBLOCA, (2) fuel cladding lost per high containment radiation readings, and (3) containment lost/potentially lost because the 21SJ44 valve failed to close, allowing an unisolable leak path outside containment with confirmed elevated Plant Vent radiation. A release IS in progress (2R41D elevated and rising). The ICMF must correctly identify this as a GE with a release in progress and use Attachment 4 (EP-SA-325-F4).
Ref: EP-SA-325-101 (R01), EP-SA-325-123 (R00), EP-SA-325-F4 (R01), Salem ECG Books (R6) | Task: 1240020502 | K/A: G2.4.41 — Knowledge of the emergency action level thresholds and classifications | Source: New | Time-Critical: Classify within 15 min / Complete ICMF within 15 min | View JPM PDF
Connections
- Related systems: ECCS, RHR
- Related procedures: EP-SA-325 — Emergency Plan Implementing Procedures
- Related EOPs: EOP-LOCA-3 — Transfer to Cold Leg Recirculation
- Related exam: 2020 NRC Operating Exam