Accident Lesson Card · Kewaunee 余热排出泵(RHR)不可用事件（LER 2005-012-01）

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NUREG Investigation Report No. NUREG-LER-2005-012-01 2005 Operational Operational

Kewaunee 余热排出泵(RHR)不可用事件（LER 2005-012-01）

Kewaunee Nuclear Power Plant, Wisconsin (NRC LER 50-305/2005-012-01)

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

RHR 泵相关失效/不可用事件，影响余热排出功能

2Root Cause

RHR 泵相关设备退化/失效

3Reliability Lessons (from investigation root cause)

The 'Root Cause' above is the core lesson of this accident; not split further.

4Associated Failure Mechanisms (Keywords)

RHR泵余热排出泵失效不可用电机轴承

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

电机轴承失效 COMP-C2-FM2再生风机失效 adr_blower_fail驱动电机/柴油机失效 fwp_driver_fail控制盘/启动回路失效 fwp_controller_failBearing failure fwp_bearing_fail出口阀/蝶阀失效 fwp_discharge_valve_failBearing failure bearing_failure吸入/排出阀片失效 valve_plate_failure轴承失效(动力端) bearing_failure脉动/振动大 pulsation_vibration轴承失效（磨损/剥落） MECH-BEARING-WEAR润滑失效 MECH-LUBRICATION-FAILURE冷却水腐蚀 MECH-CWCCavitation MECH-CAVITATION不对中 MECH-MISALIGNMENT转子不平衡 MECH-UNBALANCE结垢/堵塞 MECH-FOULING微生物腐蚀 MECH-MIC冲蚀/冲刷腐蚀 MECH-EROSION机械疲劳 MECH-MECH-FATIGUE均匀/局部减薄（通用减薄） MECH-THINNING联轴器失效 MECH-COUPLING-FAILURE振动诱发疲劳 MECH-VIB-FATIGUE大气腐蚀 MECH-ATMOS

Report No. NUREG-LER-2005-012-01 · Data from NUREG (US NRC) public investigation conclusions, compiled by Reliability AI, for reliability demonstration purposes only. This case is derived from public incident investigation reports for learning purposes only. AIM does not endorse or guarantee its accuracy.