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Letter  and Inspection Report

Nitrogen +, Hydrogen +, Lead +  and Tungsten +

10 CFR 50 +, 10 CFR 50.59 +, 10 CFR 50 Appendix B Criterion III, Design Control +, 10 CFR 50.65#a1 +  and 10 CFR 50.65#a4 +

Initiating Events +  and Mitigating Systems +

05000498  +, 05000499  +, 00498  +  and 00499  +

05000499/LER-2019-002, 0 for South Texas Project Unit 2, Incorrect Sequencer Part Replacement Leads to Undervoltage Signal and Valid Actuation of Emergency Diesel Generator +, 05000498/LER-2020-001, Automatic Actuation of Emergency Diesel Generators Due to Lockout of Switchyard Electrical Bus +, 05000498/LER-2019-002-01, Condition Prohibited by Technical Specifications and Loss of Safety Function Due to Inoperable Reactor Head Vent Throttle Valves +  and 05000498/LER-2019-001, Condition Prohibited by Technical Specifications Due to Inoperable Essential Cooling Water Pump +

05000498/FIN-2020002-01 +, 05000499/FIN-2020002-02 +  and 05000499/FIN-2020002-03 +

NRC/RGN-IV/DRP/RPB-A +  and Jeffrey Josey +

IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +, IR 05000498/2020002 +...

2.777778e-4 d (0.00667 hours, 3.968254e-5 weeks, 9.132e-6 months)  +, 1.273148e-4 d (0.00306 hours, 1.818783e-5 weeks, 4.1855e-6 months)  +  and 5.208333e-4 d (0.0125 hours, 7.440476e-5 weeks, 1.71225e-5 months)  +

IP 71111.22 +, IP 71111.17 +, IP 71111.08 +, IP 71151 +  and IP 71153, Event Followup +

NRC Inspection Manual 0609, Appendix H +, NRC Inspection Manual 0609, Appendix K +, NRC Inspection Manual 2515 +, NRC Inspection Manual 2515, Appendix D +, NRC Inspection Manual 612 +, NRC Inspection Manual 0609/Appendix A, The Significance Determination Process (SDP) for Findings At-Power +  and NRC Inspection Manual 0609/Appendix M, Significance Determination Process Using Qualitative Criteria +

IP 71111.12 +, IP 71111.18 +, IP 71111.01 +, IP 71111.04 +, IP 71111.22 +, IP 71111.05 +, IP 71111.13 +, IP 71111.19 +, IP 71111.15, Operability Determinations and Functionality Assessments +, IP 71153, Event Followup +, IP 71111.11Q +, IP 71111.08P +, IP 71111.07A +, IP 71111.17T, Evaluations of Changes, Tests, and Experiments +, IP 71111.20, Refueling and Other Outage Activities +  and IP 71152, Problem Identification and Resolution (PI&R) +

IR 05000498/2019004 +  and IR 05000498/2020002 +

05000499/LER-2019-001, Equipment Clearance Order Error Leads to Loss of Primary Containment Integrity +, 05000499/LER-2019-002, 0 for South Texas Project Unit 2, Incorrect Sequencer Part Replacement Leads to Undervoltage Signal and Valid Actuation of Emergency Diesel Generator +  and 05000498/LER-2019-002, Condition Prohibited by Technical Specifications and Loss of Safety Function Due to Inoperable Reactor Head Vent Throttle Valves +

Target Rock +  and Limitorque +

4.16KV +  and 345kV +

0PGP03-ZE-0133 +, 0PGP03-ZF-0018 +, 0PGP04-ZE-0309 +, 0POP01-ZO-0011 +, 0PGP03-ZE-0033 +, 0PGP03-XS-0001 +, 0POP02-CC-0001 +, 0POP02-EW-0001 +, 0PSP06-DJ-0001 +, 0PGP03-ZO-0003 +, 0PSP03-EW-0017 +, 0POP02-SI-0001 +, 0PGP03-ZA-0109 +, 0PAP01-ZA-0103 +, 0POP02-SI-0002 +, 0PSP06-DJ-0003 +, 0PGP03-ZE-0027 +, 0PSP03-DG-0003 +, 0PSP03-RH-0002 +, 0PGP03-DJ-0001 +, 0PEP10-ZA-0004 +, 0PEP10-ZA-0017 +, 0PEP10-ZA-0024 +, 0PGP04-ZE-0304 +, 79AB-003BB +, 27PL1-27PL8 +, 0PSP05-RC-0420 +, 0POP02-DG +, 0MAB27-FP-0142 +, 0PGP05-ZA-0002 +...

Texas +, Colorado +  and Washington +

Steam Generator +, Reactor Coolant System +, Feedwater +, Service water +, Emergency Diesel Generator +, Auxiliary Feedwater +, Primary containment +, Main Turbine +, Residual Heat Removal +, Control Rod +, Main Steam +  and Containment Spray +

TS-3.6.1.1 +, TS-3.7.7 +  and TS-6.8.1.a +

South Texas +  and Gerry Powell +

Boric Acid +, Packing leak +, Ultimate heat sink +, Weld Overlay +, Enforcement Discretion +, Nondestructive Examination +, Temporary Modification +, Functionality Assessment +, Significance Determination Process +, Large early release frequency +, Loss of Offsite Power +, Eddy Current Testing +, Operability Determination +, Coronavirus +, COVID-19 +, Liquid penetrant +, Fire Protection Program +, Dissimilar Metal Weld +, Thermal fatigue +  and Gas accumulation +