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… at all operating power reactor facilities (except D.C. Cook and Browns Ferry 1 as discussed below) beginning in … their reactor facilities, and the NRC does not expect D.C. Cook or Browns Ferry 1 to participate in this voluntary …

… is 0S-9770. Power Reactor Event Number: 41639 Facility: COOK Region: 3 State: MI Unit: [1] [ ] [ ] RX Type: [1] … Text AUTOMATIC REACTOR TRIP WITH AFW ACTUATION "The DC Cook Unit 1 Reactor automatically tripped during normal … systems functioned normally following the Reactor Trip. DC Cook Unit 1 remains stable in Mode 3 while conducting the …

… | FACILITY: COOK REGION: 3 |NOTIFICATION DATE: 10/27/1999| | UNIT: [1] … System Readiness Reviews conducted | | earlier this year at Cook regarding the use of AC fuses in DC systems. | | Protection in the Cook 250 VDC system is through the use of Gould Type RF | | …

… #: I-9098 Power Reactor Event Number: 49220 Facility: COOK Region: 3 State: MI Unit: [ ] [2] [ ] RX Type: [1] … PLANT TRANSIENT "On July 28, 2013, at 1018 EDT, DC Cook Unit 2 Reactor was manually tripped due to lowering … Auxiliary Feedwater System, as an (8) hour report. "The DC Cook Sr. Resident NRC Inspector has been notified. "The …

… - VALID SPECIF SYS ACTUATION Person (Organization): WILLIAM COOK (R1DO) Unit SCRAM Code RX CRIT Initial PWR Initial RX … will inform the NRC Resident Inspector. Notified R1DO (Cook). Power Reactor Event Number: 51764 Facility: … - POT UNCNTRL RAD REL Person (Organization): WILLIAM COOK (R1DO) Unit SCRAM Code RX CRIT Initial PWR Initial RX …

… notified."   Power Reactor Event Number: 54944 Facility: Cook Region: 3     State: MI Unit: [] [2] [] RX Type: [1] … REACTOR TRIP "At 0026 [EDT] on October 12, 2020, D.C. Cook Unit 2 tripped automatically on low-low level of #24 … of the Auxiliary Feedwater System (AFW). "The D.C. Cook Resident NRC Inspector has been notified. "Unit 2 is …

… (2C). Power Reactor Event Number: 54885 Facility: Cook Region: 3     State: MI Unit: [] [2] [] RX Type: [1] … AND AUTOMATIC SAFETY INJECTION "On September 4, 2020, DC Cook Unit 2 experienced a lowering Reactor Coolant System … (AFW), and Emergency AC Electrical Power actuations. The DC Cook Resident NRC Inspector has been notified. "Unit 2 is …

… to Revise 73.55, issued September 1, 2000. cc: A. Vietti-Cook, SECY J. Craig, OEDO I. Schoenfeld, OEDO S. Collins, …

… Nuclear Power Plants, dated May 24, 2001. cc: A. Vietti-Cook, SECY J. Craig, OEDO I. Schoenfeld, OEDO A. Thadani, …

… to issue DG-1123 for public comment.   cc: A. Vietti-Cook, SECY J. Craig, OEDO I. Schoenfeld, OEDO A. Thadani, …