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NUREG Investigation
Report No. NUREG-LER-2021-001-00-PV
2021
Operational Operational
Palo Verde 3 号机 反应堆冷却剂泵(RCP)失电跳机（LER 2021-001-00）
Palo Verde Nuclear Generating Station, Unit 3, Arizona (NRC LER 50-528/2021-001-00)
Related equipment → Centrifugal pump (centrifugal_pump)
0Fatalities
0Injuries
FailureMechanism code ELP
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
FailureELP
ISO functional code (as recorded)
ISO 14224:2016 functional failure code
ELP · External leakage - process
ISO ELP — External leakage - process.
1What Happened
RCP 失去电源→泵跳闸→反应堆停堆
2Root Cause
RCP 失去厂用电导致跳机
3Reliability Lessons (from investigation root cause)
- The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
RCP 反应堆冷却剂泵 失电 跳泵 停堆 电源丧失
About the Failure-Mode Code (click to expand)
The recorded code ELP is an ISO 14224:2016 functional failure code (describes what the equipment failed to do). The damage mechanism (how it failed) is shown in the Mapping block above. The two are distinct dimensions in ISO 14224.
5Evidence Source (transparent)
Authority：U.S. Nuclear Regulatory Commission (NRC) — Licensee Event Report (LER)
Official Report：www.nrc.gov ↗
Data Verification：verified_url_nrc_pdf_2026-08-07
↗Related Failure Modes · Traceability
This accident is not yet linked to a specific FM traceability card.