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NEIL Requirements for Testing of FWH Electrical Equipment and AOV’s

NEIL Requirements for Testing of FWH Electrical Equipment and AOV’s. Purpose. 2007 - STP self-identified nonrelated NEIL issue that resulted in repeat failure of a critical SSC. NEIL inspection coming up  comprehensive review of all requirements  found this FWH equipment issue

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NEIL Requirements for Testing of FWH Electrical Equipment and AOV’s

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  1. NEIL Requirements for Testing of FWH Electrical Equipment and AOV’s

  2. Purpose • 2007 - STP self-identified nonrelated NEIL issue that resulted in repeat failure of a critical SSC. • NEIL inspection coming up  comprehensive review of all requirements  found this FWH equipment issue • Communicate NEIL requirements regarding FWH electrical equipment/AOV testing • NEIL has spent beaucoup dinero on DC Cook event • Have shifted focus to protecting large assets (i.e. Main Turbine) • OE31559 – Reference Nine Mile Point OE

  3. Requirements Feedwater Heater Alarms and Interlocks·         Perform observation/Test/ Inspection/Surveillance of Integrity of Electrical Circuits/Heaters. Should ‘NA’, Shall 1 Fuel Cycle  LCS 2.2.5.3.2 - 2 (TG/Exciter – Operating Test) ·         Operating and testing to be conducted:  Integrity of electrical circuitry and power supply for heater extreme high level alarms, controls, switches and interlocks by testing.  Should – ‘NA’, Shall – ‘1 fuel cycle’     LCS Section 2.2.5.3.2 - 2 Feedwater Heater Level Control Valves ·         Perform observation/Test/ Inspection/Surveillance of Integrity of Electrical Circuits/ Valves.  Should ‘NA’, Shall 1 Fuel Cycle  LCS 2.2.5.3.2 -3  (TG/Exciter – Operating Test) ·         Operating and testing to be conducted:  Integrity of electrical circuitry and power supply of all remote operated heater drain and bypass valves by testing.  Should – ‘NA’, Shall – ‘1 fuel cycle’     LCS Section 2.2.5.3.2 - 3

  4. Typical Heater Drain System • Normal Level Control Valve • High Level Dump • May be digital or Analogue

  5. Typical Heater Steam Side Isolation • Level Switches that: • Shut off Extraction Steam • Shut off previous FWH flow • Shut off Blowdown flow

  6. Typical Tube Side Isolation System • Level Switches that: • Shut off Condensate flow • Open Condensate Bypass • Shut off other sources of flow into heater

  7. Considerations for Testing • RHDT’s / MSDT’s / Deaerator switches/AOV’s are not applicable • Alarms are not applicable (per our NEIL rep, though you should ask your rep specifically) • Should be done at beginning of outages to identify scope • You can take credit for SU/SD actuation, PM, or corrective PMT (monitor voltage at the contacts for large MOV’s) • Don’t have to test all equipment at the same time • No requirement to fill level switch standpipes • Ops controlled procedure is the easiest way

  8. Discussion • NEIL standards are governed by representatives from each plant • If a standard is too restrictive or is not effective, the board can change it • What is your plant’s strategy? • What do you think?

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