JPM SRO-A5 — Classify Event and Determine PARs
Admin | SRO | G2.4.41 (4.6)
Location: Classroom
Time-Critical: Yes
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- Salem Units 1 and 2 are at 100% power.
- 23 Station Power Transformer (SPT) is tagged and is 12 hours into a 24 hour scheduled maintenance window.
- An electrical grid disturbance on the 500 kV lines has caused the Unit 2 Main Generator protection circuit to automatically trip the Unit 2 reactor.
- The crew is transitioning from EOP-TRIP-1 to EOP-TRIP-2.
- Following transition to TRIP-2, 24 SPT de-energizes due to actuation of electrical protection relays.
- The 2A Emergency Diesel Generator (EDG) started then tripped on overspeed and could not be reset; and the 2B 4 KV Vital Bus de-energized following a Bus Differential protection trip.
- Minutes later the Primary Operator reports a loud sound from the EDG rooms and 2C EDG trips.
Initiating Cue:
- Maintenance provides you the following updates:
- 2A EDG will take 5 hours to repair the bent linkage to the fuel racks.
- 2B 4 KV Vital Bus has sustained significant damage to the bus bars due to a ground fault.
- 2C EDG has sustained significant engine damage due to an engine piston failure.
- 23 SPT needs 8 hours to restore and release tags.
- 24 SPT sustained an internal fault and will need outside vendor support. Vendor is expected to be on-site in 3.5 hours.
- You are the Emergency Coordinator:
1. Classify the emergency event, and
2. Complete the Initial Contact Message Form (ICMF).
- MET computer 33 FT. level wind direction is steady from 90 degrees at 2 mph.
- 2R41D, Plant Vent Radiation monitor is reading normal.
- THIS IS A TIME CRITICAL JPM
Time-Critical: Yes
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- Salem Units 1 and 2 are at 100% power.
- 23 Station Power Transformer (SPT) is tagged and is 12 hours into a 24 hour scheduled maintenance window.
- An electrical grid disturbance on the 500 kV lines has caused the Unit 2 Main Generator protection circuit to automatically trip the Unit 2 reactor.
- The crew is transitioning from EOP-TRIP-1 to EOP-TRIP-2.
- Following transition to TRIP-2, 24 SPT de-energizes due to actuation of electrical protection relays.
- The 2A Emergency Diesel Generator (EDG) started then tripped on overspeed and could not be reset; and the 2B 4 KV Vital Bus de-energized following a Bus Differential protection trip.
- Minutes later the Primary Operator reports a loud sound from the EDG rooms and 2C EDG trips.
Initiating Cue:
- Maintenance provides you the following updates:
- 2A EDG will take 5 hours to repair the bent linkage to the fuel racks.
- 2B 4 KV Vital Bus has sustained significant damage to the bus bars due to a ground fault.
- 2C EDG has sustained significant engine damage due to an engine piston failure.
- 23 SPT needs 8 hours to restore and release tags.
- 24 SPT sustained an internal fault and will need outside vendor support. Vendor is expected to be on-site in 3.5 hours.
- You are the Emergency Coordinator:
1. Classify the emergency event, and
2. Complete the Initial Contact Message Form (ICMF).
- MET computer 33 FT. level wind direction is steady from 90 degrees at 2 mph.
- 2R41D, Plant Vent Radiation monitor is reading normal.
- THIS IS A TIME CRITICAL JPM
Task Standard:
1. Classifies the event as GENERAL EMERGENCY (GE) based on EAL SG1.1 within 15 minutes.
2. Completes Attachment 4 Sections I thru V of the ICMF and selects Default PAR (No RPSA) within 15 minutes from event declaration.
1. Classifies the event as GENERAL EMERGENCY (GE) based on EAL SG1.1 within 15 minutes.
2. Completes Attachment 4 Sections I thru V of the ICMF and selects Default PAR (No RPSA) within 15 minutes from event declaration.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 1 * | Classify the emergency event | Classifies as GENERAL EMERGENCY (GE) based on ECG — EAL Section S (System Malfunction), S1 Loss of AC Power, EAL# SG1.1. Must be classified within 15 minutes. |
| 2 * | Complete the ICMF (Attachment 4, Sections I thru V) | Accurately completes EP-SA-325-F4 Sections I thru V per answer key. Must be completed within 15 minutes of event declaration. |
| 2 (cont.) | Determine Protective Action Recommendations (PARs) using Appendix 1 | Using Attachment 4, EP-SA-325-F4, Appendix 1: - Initial PAR — Yes - GE based on Loss of Three Fission Product Barriers? — No - Hostile Action Event in Progress affecting the GE? — No - Selects Default PAR (No RPSA): Evacuate All Sectors 0-5 miles Monitor & Prepare All Sectors 5-10 miles |
Key Decision Point:
Step 1 is the discriminating step — the applicant must recognize this is a General Emergency, not just a Site Area Emergency. The scenario involves loss of ALL AC power sources to Unit 2: both offsite sources (23 SPT tagged out, 24 SPT faulted) AND all three EDGs (2A tripped/unrepairable quickly, 2B vital bus damaged, 2C engine failure). EAL SG1.1 (Loss of AC Power — GE) applies because AC power cannot be restored within the EAL timeframe. The applicant must then correctly apply the Default PAR decision tree: no fission product barrier loss and no hostile action leads to Default PAR — evacuate 0-5 miles, monitor/prepare 5-10 miles.
Step 1 is the discriminating step — the applicant must recognize this is a General Emergency, not just a Site Area Emergency. The scenario involves loss of ALL AC power sources to Unit 2: both offsite sources (23 SPT tagged out, 24 SPT faulted) AND all three EDGs (2A tripped/unrepairable quickly, 2B vital bus damaged, 2C engine failure). EAL SG1.1 (Loss of AC Power — GE) applies because AC power cannot be restored within the EAL timeframe. The applicant must then correctly apply the Default PAR decision tree: no fission product barrier loss and no hostile action leads to Default PAR — evacuate 0-5 miles, monitor/prepare 5-10 miles.
Ref: EP-SA-325-114 (Section S1, Rev 00), EP-SA-325-F4 (GE, Rev 01) | Task: 1240020502 | K/A: G2.4.41 — Knowledge of the emergency action level thresholds and classifications | Source: Modified | Time-Critical: 15/15 minutes | View JPM PDF
Connections
- Related systems: EDGs, 4KV, 500KV
- Related procedures: EP-SA-325 — Emergency Plan Implementing Procedures
- Related tech specs: TS 3/4.8 — Electrical
- Related exam: 2022 NRC Operating Exam