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Air Dryer (Desiccant)Air Dryer (Desiccant)
⚠ ⚠ Top risk: 出口露点升高/带水 · RPN 128 (Critical) — watch this one first at the equipment
Risk Board (all 12 · by RPN · top 6 highlighted urgent)
Shield: Safety = people/environment　Production = production only
Technical mechanism/mitigation body in Chinese (red line: no fabricated MT; EN UI labels translated)
12Failure Modes
12High/Critical
2Standards
3Real Accidents
Tap any failure mode to flip to its on-site guidance
Device-level standard/accident index (2 standards / 3 accidents)
Standards (2 de-duplicated)
  • ISO 8573
  • ISO 7183
Accident Lessons (3 de-duplicated)
NUREG-LER-2011-003-BRUNSWICKNRC2011 ↗
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
NUREG-LER-2005-012-01NUREG2005 ↗
Kewaunee 余热排出泵(RHR)不可用事件（LER 2005-012-01）
NUREG-LER-2021-001-00-GINNUREG2021 ↗
R.E. Ginna 辅助给水泵绕组失效（LER 2021-001-00）
FM Traceability Cards (12)
Generated by Reliability AI
出口露点升高/带水RPN 128 · Critical
Failure Mechanism
干燥能力不足致露点超标、仪表空气带水
How to Detect
Online monitoring · Detection rate 80% ；Re-inspect ≤every12months
Mitigation (What to Do)
  • 露点在线监测
  • 露点仪标定
RCM Strategy
PMScheduled (Proactive) Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (2)
  • ISO 8573
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
吸附床沟流/偏流RPN 108 · High
Failure Mechanism
床层装填不均/破碎致偏流降低效率
How to Detect
Online monitoring · Detection rate 60% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 床层检查
RCM Strategy
CBMOn-Condition Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
吸附剂失效/粉化RPN 105 · High
Failure Mechanism
分子筛/活性氧化铝粉化或中毒致吸附能力下降
How to Detect
Online monitoring · Detection rate 70% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 吸附剂检测
  • 压差监测
RCM Strategy
CBMOn-Condition Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
再生切换阀失效RPN 105 · High
Failure Mechanism
切换阀卡涩/内漏致再生侧失效
How to Detect
Online monitoring · Detection rate 75% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 阀门行程测试
RCM Strategy
PMScheduled (Proactive) Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
再生加热器失效RPN 105 · High
Failure Mechanism
电加热器断丝/温控失效致再生不彻底
How to Detect
Online monitoring · Detection rate 75% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 加热器绝缘测试
RCM Strategy
PMScheduled (Proactive) Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
再生风机失效RPN 105 · High
Failure Mechanism
再生风机轴承/电机失效致再生中断
How to Detect
Online monitoring · Detection rate 70% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 风机振动监测
RCM Strategy
CBMOn-Condition Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (2)
NUREG-LER-2005-012-01NUREG2005Operational
Kewaunee 余热排出泵(RHR)不可用事件（LER 2005-012-01）
Root cause: RHR 泵相关设备退化/失效
Official source ↗
NUREG-LER-2021-001-00-GINNUREG2021Operational
R.E. Ginna 辅助给水泵绕组失效（LER 2021-001-00）
Root cause: 辅助给水泵电机绕组失效
Official source ↗
液态水夹带（分离器/疏水阀失效）RPN 105 · High
Failure Mechanism
分离器/疏水阀失效致液态水进入仪表空气
How to Detect
Online monitoring · Detection rate 75% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 疏水阀检查
RCM Strategy
PMScheduled (Proactive) Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 8573
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
双塔切换时序紊乱RPN 105 · High
Failure Mechanism
时序控制故障致两塔同时再生或同时工作
How to Detect
Online monitoring · Detection rate 75% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 时序逻辑校验
RCM Strategy
PMScheduled (Proactive) Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
干燥塔腐蚀/内衬失效RPN 98 · High
Failure Mechanism
壳体腐蚀减薄/内衬脱落致泄漏风险
How to Detect
Online monitoring · Detection rate 60% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 壁厚检测
  • 内衬检查
RCM Strategy
CBMOn-Condition Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
系统压降升高RPN 90 · High
Failure Mechanism
床层堵塞/过滤器脏污致压降升高供气不足
How to Detect
Online monitoring · Detection rate 70% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 压差监测
  • 过滤器更换
RCM Strategy
CBMOn-Condition Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 8573
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
控制器/露点仪失效RPN 84 · High
Failure Mechanism
PLC/露点仪故障致切换时序紊乱或监测失准
How to Detect
Online monitoring · Detection rate 80% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 控制逻辑校验
  • 仪表标定
RCM Strategy
PMScheduled (Proactive) Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 8573
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗
再生吹扫气异常RPN 72 · High
Failure Mechanism
吹扫气量不足/压力低致再生不充分
How to Detect
Online monitoring · Detection rate 60% ；Re-inspect ≤every24months
Mitigation (What to Do)
  • 流量监测
RCM Strategy
CBMOn-Condition Maintenance
Interval: High risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Engineering-inferred (not measured history); confirm with equipment owner before execution
Standards (1)
  • ISO 7183
Lessons Learned (1)
NUREG-LER-2011-003-BRUNSWICKNRC2011Operational
Brunswick 控制楼仪表空气干燥器故障结冰导致控制室空调/应急通风丧失（2011）
Root cause: 对制冷剂低压缺乏监测，未能及时发现导致仪用空气管路结冰；纠正措施含更换干燥器并修订程序在低压时旁路
Official source ↗