ML19050A510
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| ML19050A510 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 03/21/2019 |
| From: | NRC/RES/DRA |
| To: | |
| Chris Hunter 415-1394 | |
| References | |
| LER 2017-010-002 IR 2017012 | |
| Download: ML19050A510 (20) | |
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- containment ventingoperator fails to vent containment through CCPoperator fails to vent containment through FC to SFPoperator fails to vent containment through RHR A to FPoperator fails to vent containment
- 480V division 1 buses are unavailable
- Clinton division I 125 VDC power is unavailableoperators fail to align the swing charger*loss of instrument air system initiating event has occurredClinton instrument airoperator fails to recover emergency diesel in 30 minutesoperator fails to recover emergency diesel in 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />soperator fails to recover emergency diesel in 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />soperator fails to recover emergency diesel in 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />sAC bus fails to operate operators fail to align the MSL drains to the condenserClinton condensate hotwell makeup is unavailable*Clinton transfer - one stuck open SRVClinton transfer - one stuck open SRVClinton late injection fault treeClinton late injection fault tree*general plant transient initiating event***main condenser heat sinkpower conversion systemgeneral transient RCIC support systems
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operators fail to align the swing chargerNominalNominalNominal HEP = (Product of Diagnosis PSFs x Nominal Diagnosis HEP) + (Product of Action PSFs x Nominal Action HEP)= (1 x 0.01) + (1 x 0.001) = 1x10
-2 operators fail to align the MSL drains to the condenser ExpansiveNominalNominal HEP = (Product of Diagnosis PSFs x Nominal Diagnosis HEP) + (Product of Action PSFs x Nominal Action HEP)= (.01 x 0.01) + (1 x 0.001) = 1x10
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