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| number = ML12268A152
| number = ML12268A152
| issue date = 01/31/2012
| issue date = 01/31/2012
| title = Byron Station Shift Logs from 1/30/12-1/31/12
| title = Shift Logs from 1/30/12-1/31/12
| author name =  
| author name =  
| author affiliation = Exelon Generation Co, LLC
| author affiliation = Exelon Generation Co, LLC
Line 14: Line 14:
| page count = 22
| page count = 22
}}
}}
=Text=
{{#Wiki_filter:logs                                                                            Page 2 ot 24 (b)(4),(b)(6)
                                                  .i lh rocord was dakied fIn
                                              .;nak~
4=raw"i"1,- Fr,'edomn of Ifryr-        ~
POIfA/PA http://esoms.exeloncorp.com~logs.aspx1//22                                        1/31/2012 C
". logs                                  rage  J or Z4 (b)(4),(b)(6) http://esoms.exeloncorp.conV/ogs.aspx1  1/31/2012
".logs                                    oage 4 or L4 (b)(4) http://esoms.exeloncorp.com/logs.aspx1//22  1/31/2012
logs                                Page 5 of 24 http://esoms.exeloncorp.com/logs.aspx  1/31/2012
*.logs                                                                                                    Page 6 of 24 (b)
Days            1/30/2012            Entered 2BOL 8.1 condition E due to the loss of Unit 2          (6) 10:01:00 AM          SAT's @1009 and the 2B-DG inoperability. The action is to restore the SAT's or the 2B-DG in 12 hours or be in mode 3 in 6 hours and In mode 5 In 36 hours.
Days            1/30/2012            Entered O0BOL 11.b condition B,Dand F for the 2PRO13.
10:01:00 AM        The action is to suspend purging via this path immediately. This action has been completed.
IR#1320145 Days            1/30/2012            Entered 1DPS 2BOL 3.9 conditions A and C for both trains 10:01:00 AM          of BDPS. Condition A is to restore the train to operable in 72 hours. Condition C Is to Isolate unborated water sources in one hour and to perform a SDM In one hour.
Log Date                Entry                                                                User 1/30/2012 10:30:00      SDM performed per SR3.1.1.1 and Is satisfactory for the next 12 AM                      hours.
1/30/2012 10:56:00      Completed CO Hang for unborated water sources per C/O 96468 AM Days            1/30/2012          2PR11IJ is In unplanned LCO 2BOL 4.15 condition B. The 10:01:00 AM        action is to sample the affected train every 24 hours Rp and Chem has been contacted.
Days            1/30/2012            Entered 1BOL 8.1 condition A due to the loss of Unit 2 10:01:00 AM          SAT's @1009. The action Is to perform 1BOSR 8.1.1-1 in one hour and every 8 hours thereafter. Surveillance 1BOSR 8.1.1-1 has been completed @1054. The second action Is to restore the required qualified circuits In 72 hours or shut down the unit to mode 3 In 6 hours and to mode 5 in 36 hours.
Days            1/30/2012            Unit 2 Rx trip 10:01:00 AM Log Date                      Entry                                                    User 1/30/2012 10:01:50 AM        Entered 2BEP-0 Reactor Trip or Safety Injection            b))
1/30/2012 10:11:00 AM        Transitloned to 2BEP ES-0.1 Rx trip Response (b)
Days            1/30/2012            Unit 2 Reactor trip - Red First Out annunciator is RCP          (6) 10:01:33 AM          Undervoltage Reactor trip. IR 1319908 and 1320006 written.
Log Date      Entry Based on a report of smoke, opened SAT 242-1 and SAT 242-2 feed breakers to 1/30/2012      BUS 241 (ACB 2412), BUS 242 (ACB 2422), BUS 243 (ACB 2432) and BUS 244 (ACB 10:09:00 AM    2442). Offsite power from the Unit 2 SATs has been disconnected. 2A and 28 D/Gs' started and are supplying BUS 241 and 242.
1/30/2012      Declared an Unusual Event on Byron Unit 2 due to a loss of all otfsite power to ESF 10: 18:00 AM  BUSes 241 and 242.
1/30/2012 130:23:012    Nuclear Accident Reporting System (NARS) form communicated to Illinois EMA.
10:23:00 AN 1/30/2012 http://esoms.exeloncorp.com/logs.aspx                                                                    1/31/2012
* logs                                                                                                Page 7 of 24 S(b) 10:33:00 AN                                                                                              ,(6)
Completed Dialogic notification for Byron Unit 2 Unusual Event.
1030/2012      Completed NRC Event Notification EN# 47624.
10:39:00 AM Days              1/30/2012          Entered PLANNED LCOAR OBOL 3.p, Condition A as 10:01:59 AM        2AR113 and 2AR123 setpoint are currently more than 10 mr/hr above background following U2 Rx trip Log Date      Entry Entered LCOAR OBOL 3.p Condition B for required action and completion time of Condition A not met. Entered LCOAR 2BOL 3.6 Conditions A and B for 2ARO 113 and 2AR0123 inoperable as directed by OBOL 3.p. Entered LCOAR 2BOL 6.3 Condition B for 1/30/2012    all U-2 CNMT vent isolation valves inoperable as directed by 2BOL 3.6 Required action 2:01:59 PH  of the two LCOAR's is to isolate the affected penetration flowpath by use of at least one closed and de-activated automatic valve. 2VQ001B and 002B are 0OS under an admin CO#94013230. 2VQ003, 004B and 2VQ005B fuses were previously pulled and are tracked for configuration control under ACPS#12-0026 Days              1/30/2012          Started 1A SX Pump and opened 1SX007 and 2SX007 to 10:04:54 AM        supply SX to U2 due to no SX Pumps running on U2.
Days              1/30/2012          Entered Unplanned 0BOL 11.a, Conditions B and D due to 10:05:32 AM        loss of Sample Flow on OPR10J.
Days          1/30/2012        Secured Transfer of "GA" WX Monitor Tank (24%) to            (b)(6) 10:08:00        "OB" WX Monitor Tank (48%) per BOP WX-112.
AM Days              1/30/2012          Both ESF Bus energized                                              I(b) 10:11:00 AM Days              1/30/2012          TSO (Mark 3enga) called to inquire about the loss of U-2 10:12:16 AM        generation. They stated that they lost Indication on C-phase of Bus 13. Told TSO that Byron Is addressing the loss of offslte power on Unit 2.
Days          1/30/2012        Started "GA" GW Compressor for U-2 VCT Venting per            (b(            ]
10:14:00        BOP GW-I. "" In Service GDT (36#), "" Cover GDT AM                (85#) and Vent Header Pressure at (1.92#).
Log Date          Entry                                                                      User 1/30/2012        Realigned GDT's per BOP GW-6 GDT OB (92#) is now In Storage for            (b)(6)
Decay. GOT OF (6#) is now the In Service GOT. "" GDT OC (5#) is 11:58:00 AM      Aligned for Stand By.
1/30/2012        Secured "0A" GW Compressor per BOP GW-1. "" In Service GDT (15#),        [b(6            l 1:30:04 PM        ". Cover GOT (85#) and Vent Header Pressure at (1.96#).                                    I Days              1/30/2012          Offsite assistance requested                                          C 10:23:00 AM Log Date            Entry                                                                            User 1/30/2012          Two Byron Fire Department trucks came Inside the protected area. Five          (b)(6) 10:48:00 AM        trucks are waiting inside the parking lot area if necessary.
Byron Fire Department trucks are outside the protected area.
1/30/2012 http://esoms.exeloncorp.com/logs.aspx                                                                    1/31/2012
. logs                                                                                        Page 8 of 24 (b)(4),(b)(6)
Days      1/30/2012      Re-aligned charging to the RWST due to the loss of the          (6) 10:25:00 AM    Unit 2 SAT's and the loss of the Boric acid transfer pump.
This was done prior to the auto swap-over.
Days      1/30/2012      Received permission from bulk power to deenergize BUS 10:28:06 AM    13 and isolate U2 Switchard from Line 0622 per*-
1(b)(6)  j                                        ff!
Days      1/30/2012    SDM for Unit 2 good until 2201 1/30/12. SDM Completed 10:30:00 AM Days      1/30/2012    Secured both OA and OB SX Makeup pumps due to high 10:34:23 AM  level in the SX Cooling Tower. These pumps were started in the emergency procedures.
Days      1/30/2012      Notified Chemistry to sample for Boron every 15 min.
10:36:00 AM Days      1/30/2012    RP notified to perform Tech spec samples for power drop 10:38:00 AM  of greater than 15% in one hour.
Days      1/30/2012    2BCSR 4.16.2-1 initiated for greater than a 15% power 10:38:00 AM  change Days      1/30/2012    Notified NRC Operations Center of the Unit 2 reactor trip.
10:39:24 AM  ENS worksheet EN# 47624 transmitted via Red Phone.
NRC requests periodic updates.
Days      1/30/2012    Opened Swtlchyard breakers 7-13 and 12-13 to 10:41:14 AM    deenergize U2 SAT high side windings.
Days      1/30/2012      Opened U2 SAT MOD disconnects 242-1 and 242-2.
10:41:41 AM Days      1/30/2012      Notified by Resident NRC Inspecto (b)(6)            that the 10:49:04 AM    NRC Is in Monitoring Mode.
Days      1/30/2012      Completed 1BOSR 8.1.1-1 and 2BOSR 8.1.1-1, Normal 10:54:32 AM    and Alternate Offsite Power Surveillances unsatisfactory.
U2 SAT Is de-energized.
Days      1/30/2012      All MSIV's were closed one at a time per procedure due to 10:56:00 AM    the loss of the CW system and to minimize the water hammer from the MSIV system lines.
Days      1/30/2012      Entered 2BEP ESO.2 due to the failure of the Unit 2 SAT's 11:00:00 AM Days      1/30/2012      2VPO3CB did not start after the failure of the SAT's on the 11:04:00 AM    Unit 2 side. IR#
Days      1/30/2012    Re-aligned charging to the VCT from the RWST.
11:12:00 AM http://esoms.exeloncorp.conVIlogs.aspx13/22                                                  1/31/2012
'.logs                                                                                                  Page 9 of 24 Days              1/30/2012            TR Operator secured both Ul and U2 Hotwell Reject.
11: 17:51 AM Days              1/30/2012            Entered unplanned LCO 2BOL 5.2 condition A for the 2B-11:19:00 AM          CV Pp. The 2B-CV Pp was placed in PTL since the 2B-DG Is running and on the sequencer. 2B CV pp remains AVAILABLE for ONLINE risk. The action Is toA train to operable in 7 days. Peer checked byI      :7.1 Log Date          Entry                                                                            User Entered 28OL 1.d condition A for the 2B-CV Pp being placed In PTL due to 1/30/2012 Bus 242 being on the sequencer, The action Is to restore the pump to 11:19:00 AM operable In 7 days.
Days          1/30/2012        Started Transfer of "0B" WF Tank (37.7%) to "OA" WX 11:22:00        Mon Tank (240/a) for Normal Water Processing per BOP AM                WF-101. Swapped Inlet vlv to the "AO WF Tank.
Log Date              Entry                                                                  User 1/30/2012 1:57:00    Secured Transfer of "OB" WF Tank (16%) to "OA' WX Mon Tank              (b)(6)
PM                    (21.3%) per BOP WF-101.                                                                I Days              1/30/2012          Chem reports that the Boron sample for Unit 2 is                  (b)(6) 11:28:00 AM          1252ppm Days              1/30/2012          Chemistry reports that the Unit 2 Boric acid sample for 11:28:00 AM          Unit 2 RCS Is 1252ppm Days              1/30/2012          (b)(6)              called to Inquire if the Byron 11:29:44 AM        Switchyard was In a condition that would allow the reclosure of the ring busses (i.e. Re-energize bus 11 and bus 13). I told them that if they provided switching orders, Byron could reenergize Bus 11. However, until the location of the problem on Bus 13 was identified and the bus was evaluated as acceptable, Byron would not accept switching orders for Bus 13. TSO agreed. Notified TSO that the Unit 2 SAT MODs were open. However, the location of the issue has not been identified yet.
Days            1/30/2012            Restored OPR10J to green status from loss of flow.
11:37:24 AM Days            1/30/2012            Unit 2 PRT Is at 95% started draining per BOP RY-4 11:42:00 AM Days            1/30/2012            Unit 2 FC Pp reported to be running without the cubical 11:45:00 AM          cooler fans running.
Log Date                Entry                                                                User 1/30/2012 2:00:00      All unit 2 FC cubical fans are running. The thermal overloads were  (b)(6)
PM                      reset.
Days              1/30/2012            Secured status trees per BAP 1310-10T2 per SM and US            (b)(6) 11:45:00 AM          concurrence. All Status trees are Green.
Days              1/30/2012            Followup call made to NRC via Red Phone.
http://esoms.exeloncorp.com/logs.aspx                                                                    1/31/2012
.logs                                                                                          Page 10 of 24 (b)(6) 11:45:14 AM Days            1/30/2012          Chemistry reports that Unit 2 RCS Boron is 1409 PPM 11:53:00 AM Days            1/30/2012          Started 2B-RCFC 11:55:00 AM Days            1/30/2012          Started OA MUD Train to U2 CST, (80%).
11:55:20 AM Days            1/30/2012          Commenced Unit 2 RCS Cooldown to 520 F on all S/G 11:58:00 AM        PORV's unable to place Unit 2 Turbine on the gear.
Log Date        Entry                                                                            use:
13/02    Commenced RCS depressurization per 2B3EP ES-O,2 Natural Circulation            (b)(6) 1/30/0102P      Cooldown. Opened Pressurizer Aux Spray valve 2CV8145. Started 2BOSR 4.C.2-1 Pzr Spray Water Temp Diff Limit Surv (During Aux Spray Operation) 1/30/2012      Commenced RCS cooldown per 2BEP ES-0.2 Natural Circulation Cooldown.
Lt1L:58:01 AN    Started 2BOSR 4.3.1-1 RCS Press/Temp Limit Surv.
Days            1/30/2012          Restarted U2 SFP Cooling Pump. NLO reports not all 12:03:41 PM        cubicle cooler fans are operating.
(b)(t)
Days          1/30/2012      Started Transfer of "OA" WX Mon Tank (24%) to "GB" 12:04:00        WX Mon Tank (48%) Thru Vendor Demin for Normal PM              Water Processing per BOP WX-112 Log Date            Entry                                                              User Secured Transfer of "0A" WX Monitor Tank (11%) to "0B" WX          (b)(6) 1/30/2012 5:35.00 PM          Monitor Tank (88.81%) per BOP WX-112.
Chemistry reports that the Unit 2 Boron sample is            (b)(6)
Days            1/30/2012 12:06:00 PM        1525ppm Days            1/30/2012          Followup call made to NRC via Red Phone.
12:15:09 PM Days            1/30/2012          Chemistry reports that Unit 2 RCS Boron Concentration is 12:16:00 PM        1622 ppm Days            1/30/2012          Faxed ENS Worksheet EN# 47624 to the NRC Operations 12:18:35 PM        Office.
Days            1/30/2012          Started 2A Containment Chiller using BOP VP-1.
12:31:10 PM Days            1/30/2012          PRT level is 73% secured draining the PRT.
12:32:00 PM Days            1/30/2012          Chemistry reports Boron concentration results: U-1 RCS 12:32:40 PM        @ 938 PPM, sample time was 0828 Verified/Adjusted Boric Acid Flow Control Potentiometer setting to the value of 3.83 per BOP CV-7.
Days            1/30/2012          Received report that Unit 2 online risk was evaluated and http://esoms.exeloncorp.coni/logs.aspx                                                              1/31/2012
.logs                                                                                                Page 11 of 24 12:38:59 PM        is Yellow.
Days          1/30/2012        Started Transfer of "0B" HUT (50.8%) to "OA" AB Mon 12:45:00        Tank (69.7%) per BOP AB-101-1 Discharge Pressure PM              (135#) and 58 GPM Flow Thru Condensate Demin.
Log Date                Entry                                                            User 1/30/2012 1:46:02        Secured Transfer of "OB" HUT (48.8%) to "0A" AB Mon Tank        (b)(6)
PM                        (85%).
Days              1/30/2012          Water has been rerported locally on the 2A-RH Pp motor          (b)(6) 12:48:00 PM        2B-RH Pp Boron is 2166 and Boron for the 2A-RH Pp Is 2251 Log Date      Entry Field Supervisor and PED    )      jinvestigated water spray on 2A RH pump.
1/30/2012    Reported back that the water spray does not impact the ability of the 2A RH pump to 1:20:00 PM    run. The motor fins are directed downwards and the motor would blow any spray away. The electrical box connections are water tight. Ops and Maintenance will route water away from pump and motor. Maintenance to repair flood seal above pump.
Days              1/30/2012          Chemistry reports that the Ult 2 Boron Is 1855 ppm 12:53:00 PM Days              1/30/2012          Received report that Unit 1 online risk was evaluated as 12:57:09 PM        Yellow, due to loss of Unit 2 SATs.
Days              1/30/2012          2B AF DO Day tank level low 1:12:00 PM Days              1/30/2012          Followup call made to NRC via Red Phone.
1:15:11 PM Days              1/30/2012          Placed Boric add transfer pump in PTL swapped over to 1:16:00 PM          RWST due to BDPS C/O Days              1/30/2012          Chemistry reports that Unit 2 RCS Boron Is 2141ppm 1:25:00 PM Days              1/30/2012          P-11 Blocks have been Imposed 1:30:00 PM Days          1/30/2012        Started "OA" GW Compressor for Vent Header Pressure          (b)(6) 1:35:00 PM        Control per BOP GW-1. "" In Service GDT (25#),
Cover GDT (84#).
Log Date          Entry                                                                      User Secured "OA" GW Compressor per BOP GW-1. "" In Service GDT (29#),        (b)(6) 1/30/2012 1:48:00 PH        .... Cover GDT (84#) and Vent Header Pressure at (1.76#).                                1 Days              1/30/2012            Started the 2B-CRDM Booster fan                                (b)(6) 1:37:00 PM Days              1/30/2012            Secured 1A SX Pump using BOP SX-2. Closed 1SX007 and 1:40:01 PM          2SX007.
http://esoms.exeloncorp.com/logs.aspx                                                                    1/31/2012
logs                                Page 12 of 24
                ,(b)(6) 1(b)(4) http://esoms.exeloncorp.com/logs.aspx    1/31/2012
logs                                Page 13 of 24 l(b)(4),(b)(6) http://esoms.exeloncorp.com/logs.aspx    1/31/2012
.logs                                Page 14 of 24 http://esoms.exeloncorp.com/logs.aspx    1/31/2012
logs                                      Page 15 of 24 Rb)(4),(b)(6) http://esoms.exeloncorp.conVlogs.aspx1//22    1/31/2012
logs                                      Page 16 of 24 http://esoms.exeloncorp.conliogs.aspx1//22  1/31/2012
* logs                                Page 17 of 24 l(b)(4),(b)(6) http://esoms.exeloncorp.com/logs.aspx    1/31/2012
logs                                Page 18 of 24 (b)(4),(b)(6) http://esoms.exeloncorp.con/1ogs.aspx  1/31/2012
.logs                                Page 19 of 24 (b)(4),(b)(6) http://esoms.exeloncorp.com/logs.aspx    1/31/2012
logs                                Page 20 of 24 1(b)(4),(b)(6) http://esoms.exeloncorp.com/logs.aspx  1/31/2012
. logs                                Page 21 of 24 (b)(4),(b)(6) http://esoms.exeloncorp.con/Iogs.aspx    1/31/2012
http://esoms.exeloncorp.com/logs.aspx 1/31/2012
*logs                                Page 23 of 24 http://esoms.exeloncorp.com/logs.aspx    1/31/2012}}

Latest revision as of 23:12, 11 November 2019

Shift Logs from 1/30/12-1/31/12
ML12268A152
Person / Time
Site: Byron Constellation icon.png
Issue date: 01/31/2012
From:
Exelon Generation Co
To:
NRC/RGN-III
References
FOIA/PA-2012-0287
Download: ML12268A152 (22)
v • d • e


Text

logs Page 2 ot 24 (b)(4),(b)(6)

.i lh rocord was dakied fIn

.;nak~

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POIfA/PA http://esoms.exeloncorp.com~logs.aspx1//22 1/31/2012 C

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".logs oage 4 or L4 (b)(4) http://esoms.exeloncorp.com/logs.aspx1//22 1/31/2012

logs Page 5 of 24 http://esoms.exeloncorp.com/logs.aspx 1/31/2012

  • .logs Page 6 of 24 (b)

Days 1/30/2012 Entered 2BOL 8.1 condition E due to the loss of Unit 2 (6) 10:01:00 AM SAT's @1009 and the 2B-DG inoperability. The action is to restore the SAT's or the 2B-DG in 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or be in mode 3 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and In mode 5 In 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

Days 1/30/2012 Entered O0BOL 11.b condition B,Dand F for the 2PRO13.

10:01:00 AM The action is to suspend purging via this path immediately. This action has been completed.

IR#1320145 Days 1/30/2012 Entered 1DPS 2BOL 3.9 conditions A and C for both trains 10:01:00 AM of BDPS. Condition A is to restore the train to operable in 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. Condition C Is to Isolate unborated water sources in one hour and to perform a SDM In one hour.

Log Date Entry User 1/30/2012 10:30:00 SDM performed per SR3.1.1.1 and Is satisfactory for the next 12 AM hours.

1/30/2012 10:56:00 Completed CO Hang for unborated water sources per C/O 96468 AM Days 1/30/2012 2PR11IJ is In unplanned LCO 2BOL 4.15 condition B. The 10:01:00 AM action is to sample the affected train every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Rp and Chem has been contacted.

Days 1/30/2012 Entered 1BOL 8.1 condition A due to the loss of Unit 2 10:01:00 AM SAT's @1009. The action Is to perform 1BOSR 8.1.1-1 in one hour and every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter. Surveillance 1BOSR 8.1.1-1 has been completed @1054. The second action Is to restore the required qualified circuits In 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or shut down the unit to mode 3 In 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and to mode 5 in 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

Days 1/30/2012 Unit 2 Rx trip 10:01:00 AM Log Date Entry User 1/30/2012 10:01:50 AM Entered 2BEP-0 Reactor Trip or Safety Injection b))

1/30/2012 10:11:00 AM Transitloned to 2BEP ES-0.1 Rx trip Response (b)

Days 1/30/2012 Unit 2 Reactor trip - Red First Out annunciator is RCP (6) 10:01:33 AM Undervoltage Reactor trip. IR 1319908 and 1320006 written.

Log Date Entry Based on a report of smoke, opened SAT 242-1 and SAT 242-2 feed breakers to 1/30/2012 BUS 241 (ACB 2412), BUS 242 (ACB 2422), BUS 243 (ACB 2432) and BUS 244 (ACB 10:09:00 AM 2442). Offsite power from the Unit 2 SATs has been disconnected. 2A and 28 D/Gs' started and are supplying BUS 241 and 242.

1/30/2012 Declared an Unusual Event on Byron Unit 2 due to a loss of all otfsite power to ESF 10: 18:00 AM BUSes 241 and 242.

1/30/2012 130:23:012 Nuclear Accident Reporting System (NARS) form communicated to Illinois EMA.

10:23:00 AN 1/30/2012 http://esoms.exeloncorp.com/logs.aspx 1/31/2012

  • logs Page 7 of 24 S(b) 10:33:00 AN ,(6)

Completed Dialogic notification for Byron Unit 2 Unusual Event.

1030/2012 Completed NRC Event Notification EN# 47624.

10:39:00 AM Days 1/30/2012 Entered PLANNED LCOAR OBOL 3.p, Condition A as 10:01:59 AM 2AR113 and 2AR123 setpoint are currently more than 10 mr/hr above background following U2 Rx trip Log Date Entry Entered LCOAR OBOL 3.p Condition B for required action and completion time of Condition A not met. Entered LCOAR 2BOL 3.6 Conditions A and B for 2ARO 113 and 2AR0123 inoperable as directed by OBOL 3.p. Entered LCOAR 2BOL 6.3 Condition B for 1/30/2012 all U-2 CNMT vent isolation valves inoperable as directed by 2BOL 3.6 Required action 2:01:59 PH of the two LCOAR's is to isolate the affected penetration flowpath by use of at least one closed and de-activated automatic valve. 2VQ001B and 002B are 0OS under an admin CO#94013230. 2VQ003, 004B and 2VQ005B fuses were previously pulled and are tracked for configuration control under ACPS#12-0026 Days 1/30/2012 Started 1A SX Pump and opened 1SX007 and 2SX007 to 10:04:54 AM supply SX to U2 due to no SX Pumps running on U2.

Days 1/30/2012 Entered Unplanned 0BOL 11.a, Conditions B and D due to 10:05:32 AM loss of Sample Flow on OPR10J.

Days 1/30/2012 Secured Transfer of "GA" WX Monitor Tank (24%) to (b)(6) 10:08:00 "OB" WX Monitor Tank (48%) per BOP WX-112.

AM Days 1/30/2012 Both ESF Bus energized I(b) 10:11:00 AM Days 1/30/2012 TSO (Mark 3enga) called to inquire about the loss of U-2 10:12:16 AM generation. They stated that they lost Indication on C-phase of Bus 13. Told TSO that Byron Is addressing the loss of offslte power on Unit 2.

Days 1/30/2012 Started "GA" GW Compressor for U-2 VCT Venting per (b( ]

10:14:00 BOP GW-I. "" In Service GDT (36#), "" Cover GDT AM (85#) and Vent Header Pressure at (1.92#).

Log Date Entry User 1/30/2012 Realigned GDT's per BOP GW-6 GDT OB (92#) is now In Storage for (b)(6)

Decay. GOT OF (6#) is now the In Service GOT. "" GDT OC (5#) is 11:58:00 AM Aligned for Stand By.

1/30/2012 Secured "0A" GW Compressor per BOP GW-1. "" In Service GDT (15#), [b(6 l 1:30:04 PM ". Cover GOT (85#) and Vent Header Pressure at (1.96#). I Days 1/30/2012 Offsite assistance requested C 10:23:00 AM Log Date Entry User 1/30/2012 Two Byron Fire Department trucks came Inside the protected area. Five (b)(6) 10:48:00 AM trucks are waiting inside the parking lot area if necessary.

Byron Fire Department trucks are outside the protected area.

1/30/2012 http://esoms.exeloncorp.com/logs.aspx 1/31/2012

. logs Page 8 of 24 (b)(4),(b)(6)

Days 1/30/2012 Re-aligned charging to the RWST due to the loss of the (6) 10:25:00 AM Unit 2 SAT's and the loss of the Boric acid transfer pump.

This was done prior to the auto swap-over.

Days 1/30/2012 Received permission from bulk power to deenergize BUS 10:28:06 AM 13 and isolate U2 Switchard from Line 0622 per*-

1(b)(6) j ff!

Days 1/30/2012 SDM for Unit 2 good until 2201 1/30/12. SDM Completed 10:30:00 AM Days 1/30/2012 Secured both OA and OB SX Makeup pumps due to high 10:34:23 AM level in the SX Cooling Tower. These pumps were started in the emergency procedures.

Days 1/30/2012 Notified Chemistry to sample for Boron every 15 min.

10:36:00 AM Days 1/30/2012 RP notified to perform Tech spec samples for power drop 10:38:00 AM of greater than 15% in one hour.

Days 1/30/2012 2BCSR 4.16.2-1 initiated for greater than a 15% power 10:38:00 AM change Days 1/30/2012 Notified NRC Operations Center of the Unit 2 reactor trip.

10:39:24 AM ENS worksheet EN# 47624 transmitted via Red Phone.

NRC requests periodic updates.

Days 1/30/2012 Opened Swtlchyard breakers 7-13 and 12-13 to 10:41:14 AM deenergize U2 SAT high side windings.

Days 1/30/2012 Opened U2 SAT MOD disconnects 242-1 and 242-2.

10:41:41 AM Days 1/30/2012 Notified by Resident NRC Inspecto (b)(6) that the 10:49:04 AM NRC Is in Monitoring Mode.

Days 1/30/2012 Completed 1BOSR 8.1.1-1 and 2BOSR 8.1.1-1, Normal 10:54:32 AM and Alternate Offsite Power Surveillances unsatisfactory.

U2 SAT Is de-energized.

Days 1/30/2012 All MSIV's were closed one at a time per procedure due to 10:56:00 AM the loss of the CW system and to minimize the water hammer from the MSIV system lines.

Days 1/30/2012 Entered 2BEP ESO.2 due to the failure of the Unit 2 SAT's 11:00:00 AM Days 1/30/2012 2VPO3CB did not start after the failure of the SAT's on the 11:04:00 AM Unit 2 side. IR#

Days 1/30/2012 Re-aligned charging to the VCT from the RWST.

11:12:00 AM http://esoms.exeloncorp.conVIlogs.aspx13/22 1/31/2012

'.logs Page 9 of 24 Days 1/30/2012 TR Operator secured both Ul and U2 Hotwell Reject.

11: 17:51 AM Days 1/30/2012 Entered unplanned LCO 2BOL 5.2 condition A for the 2B-11:19:00 AM CV Pp. The 2B-CV Pp was placed in PTL since the 2B-DG Is running and on the sequencer. 2B CV pp remains AVAILABLE for ONLINE risk. The action Is toA train to operable in 7 days. Peer checked byI :7.1 Log Date Entry User Entered 28OL 1.d condition A for the 2B-CV Pp being placed In PTL due to 1/30/2012 Bus 242 being on the sequencer, The action Is to restore the pump to 11:19:00 AM operable In 7 days.

Days 1/30/2012 Started Transfer of "0B" WF Tank (37.7%) to "OA" WX 11:22:00 Mon Tank (240/a) for Normal Water Processing per BOP AM WF-101. Swapped Inlet vlv to the "AO WF Tank.

Log Date Entry User 1/30/2012 1:57:00 Secured Transfer of "OB" WF Tank (16%) to "OA' WX Mon Tank (b)(6)

PM (21.3%) per BOP WF-101. I Days 1/30/2012 Chem reports that the Boron sample for Unit 2 is (b)(6) 11:28:00 AM 1252ppm Days 1/30/2012 Chemistry reports that the Unit 2 Boric acid sample for 11:28:00 AM Unit 2 RCS Is 1252ppm Days 1/30/2012 (b)(6) called to Inquire if the Byron 11:29:44 AM Switchyard was In a condition that would allow the reclosure of the ring busses (i.e. Re-energize bus 11 and bus 13). I told them that if they provided switching orders, Byron could reenergize Bus 11. However, until the location of the problem on Bus 13 was identified and the bus was evaluated as acceptable, Byron would not accept switching orders for Bus 13. TSO agreed. Notified TSO that the Unit 2 SAT MODs were open. However, the location of the issue has not been identified yet.

Days 1/30/2012 Restored OPR10J to green status from loss of flow.

11:37:24 AM Days 1/30/2012 Unit 2 PRT Is at 95% started draining per BOP RY-4 11:42:00 AM Days 1/30/2012 Unit 2 FC Pp reported to be running without the cubical 11:45:00 AM cooler fans running.

Log Date Entry User 1/30/2012 2:00:00 All unit 2 FC cubical fans are running. The thermal overloads were (b)(6)

PM reset.

Days 1/30/2012 Secured status trees per BAP 1310-10T2 per SM and US (b)(6) 11:45:00 AM concurrence. All Status trees are Green.

Days 1/30/2012 Followup call made to NRC via Red Phone.

http://esoms.exeloncorp.com/logs.aspx 1/31/2012

.logs Page 10 of 24 (b)(6) 11:45:14 AM Days 1/30/2012 Chemistry reports that Unit 2 RCS Boron is 1409 PPM 11:53:00 AM Days 1/30/2012 Started 2B-RCFC 11:55:00 AM Days 1/30/2012 Started OA MUD Train to U2 CST, (80%).

11:55:20 AM Days 1/30/2012 Commenced Unit 2 RCS Cooldown to 520 F on all S/G 11:58:00 AM PORV's unable to place Unit 2 Turbine on the gear.

Log Date Entry use:

13/02 Commenced RCS depressurization per 2B3EP ES-O,2 Natural Circulation (b)(6) 1/30/0102P Cooldown. Opened Pressurizer Aux Spray valve 2CV8145. Started 2BOSR 4.C.2-1 Pzr Spray Water Temp Diff Limit Surv (During Aux Spray Operation) 1/30/2012 Commenced RCS cooldown per 2BEP ES-0.2 Natural Circulation Cooldown.

Lt1L:58:01 AN Started 2BOSR 4.3.1-1 RCS Press/Temp Limit Surv.

Days 1/30/2012 Restarted U2 SFP Cooling Pump. NLO reports not all 12:03:41 PM cubicle cooler fans are operating.

(b)(t)

Days 1/30/2012 Started Transfer of "OA" WX Mon Tank (24%) to "GB" 12:04:00 WX Mon Tank (48%) Thru Vendor Demin for Normal PM Water Processing per BOP WX-112 Log Date Entry User Secured Transfer of "0A" WX Monitor Tank (11%) to "0B" WX (b)(6) 1/30/2012 5:35.00 PM Monitor Tank (88.81%) per BOP WX-112.

Chemistry reports that the Unit 2 Boron sample is (b)(6)

Days 1/30/2012 12:06:00 PM 1525ppm Days 1/30/2012 Followup call made to NRC via Red Phone.

12:15:09 PM Days 1/30/2012 Chemistry reports that Unit 2 RCS Boron Concentration is 12:16:00 PM 1622 ppm Days 1/30/2012 Faxed ENS Worksheet EN# 47624 to the NRC Operations 12:18:35 PM Office.

Days 1/30/2012 Started 2A Containment Chiller using BOP VP-1.

12:31:10 PM Days 1/30/2012 PRT level is 73% secured draining the PRT.

12:32:00 PM Days 1/30/2012 Chemistry reports Boron concentration results: U-1 RCS 12:32:40 PM @ 938 PPM, sample time was 0828 Verified/Adjusted Boric Acid Flow Control Potentiometer setting to the value of 3.83 per BOP CV-7.

Days 1/30/2012 Received report that Unit 2 online risk was evaluated and http://esoms.exeloncorp.coni/logs.aspx 1/31/2012

.logs Page 11 of 24 12:38:59 PM is Yellow.

Days 1/30/2012 Started Transfer of "0B" HUT (50.8%) to "OA" AB Mon 12:45:00 Tank (69.7%) per BOP AB-101-1 Discharge Pressure PM (135#) and 58 GPM Flow Thru Condensate Demin.

Log Date Entry User 1/30/2012 1:46:02 Secured Transfer of "OB" HUT (48.8%) to "0A" AB Mon Tank (b)(6)

PM (85%).

Days 1/30/2012 Water has been rerported locally on the 2A-RH Pp motor (b)(6) 12:48:00 PM 2B-RH Pp Boron is 2166 and Boron for the 2A-RH Pp Is 2251 Log Date Entry Field Supervisor and PED ) jinvestigated water spray on 2A RH pump.

1/30/2012 Reported back that the water spray does not impact the ability of the 2A RH pump to 1:20:00 PM run. The motor fins are directed downwards and the motor would blow any spray away. The electrical box connections are water tight. Ops and Maintenance will route water away from pump and motor. Maintenance to repair flood seal above pump.

Days 1/30/2012 Chemistry reports that the Ult 2 Boron Is 1855 ppm 12:53:00 PM Days 1/30/2012 Received report that Unit 1 online risk was evaluated as 12:57:09 PM Yellow, due to loss of Unit 2 SATs.

Days 1/30/2012 2B AF DO Day tank level low 1:12:00 PM Days 1/30/2012 Followup call made to NRC via Red Phone.

1:15:11 PM Days 1/30/2012 Placed Boric add transfer pump in PTL swapped over to 1:16:00 PM RWST due to BDPS C/O Days 1/30/2012 Chemistry reports that Unit 2 RCS Boron Is 2141ppm 1:25:00 PM Days 1/30/2012 P-11 Blocks have been Imposed 1:30:00 PM Days 1/30/2012 Started "OA" GW Compressor for Vent Header Pressure (b)(6) 1:35:00 PM Control per BOP GW-1. "" In Service GDT (25#),

Cover GDT (84#).

Log Date Entry User Secured "OA" GW Compressor per BOP GW-1. "" In Service GDT (29#), (b)(6) 1/30/2012 1:48:00 PH .... Cover GDT (84#) and Vent Header Pressure at (1.76#). 1 Days 1/30/2012 Started the 2B-CRDM Booster fan (b)(6) 1:37:00 PM Days 1/30/2012 Secured 1A SX Pump using BOP SX-2. Closed 1SX007 and 1:40:01 PM 2SX007.

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