Text

2013 Byron Nuclear Station Initial License Examination Proposed Simulator Scenarios
	ML13142A172
Person / Time
Site:	Byron
Issue date:	03/11/2013
From:	Mcneil D; NRC/RGN-III/DRS/OLB
To:	; Exelon Generation Co
References
	50-454/13-301, 50-455/13-301
	Download: ML13142A172 (67)
	v • d • e

Appendix D Scenario Outline Form ES-D-1 Facility: _Byron Nuclear Station Scenario No.: __1__ Op-Test No.: _2013301_

Examiners: _D. McNeil__________________ Operators: _____________________________

_R. Baker___________________ _____________________________

_D. McNeil__________________ _____________________________

Initial Conditions: __IC-22____________________________________________________________

Turnover: Unit 1 is at 100% power, steady state, equilibrium xenon, MOL. Unit output is 1230 MW. Boron concentration is 892 ppm. Online risk is green. A TV/GV surveillance is scheduled to be performed. The unit will be ramped to 89% power at 3MW/min for the surveillance.

Event Malf. No. Event Type* Event No. Description Preload ZDI 11CS01PB(2) PTL IRF ED071G OPEN IOR ZLO1CS010B1- OFF 1B CS pump O.O.S.

IRF CS01 0 1CS007B OOS IRF ED063H- OPEN 1CS010B OOS IRF ED063G OPEN 1CS0010B close IRF ED071C OPEN 1CS019B OOS IMF RP26C 1CS009B OOS IMF RP28C 1CS001B OOS Trgset 3 ESF relay failure of 1A RH pump zdi1fw012c(1).gt.0 ESF relay failure of 1B RH pump Trg 3 dor zlo1fw012c1 1FW012C recirc valve fails open. Manual close Trgset 5 available.

fwv1fw012c.gt.0.9 Trg 5 ior zlo1fw012c1 off R (RO) (SRO) 1 N (BOP, Ramp down for TV/GV Surveillance SRO)

IMF PA0253 ON 2 TS (SRO) S/G PORV 1MS018A Inop IOR ZDI1MS018A CLS 3 IMF FW16 0 I (BOP, SRO) 1PT508 fails low 1CV121 slowly fails open. Manual control is 4 IMF CV10 200 180 134 C (RO, SRO) available.

I (RO, SRO) 5 IMF RX10A 0 30 1PT 505 fails low TS (SRO)

Loss of IB 114 due to a bus fault. Tech Spec 6 IMF ED11D TS (SRO) 3.8.9 required shutdown within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months Ramp fwv1FW012C 1 1 C (BOP, 7 1FW012C recirc fails open 1200 SRO)

LB LOCA terminating in transfer to Cold Leg 8 MF TH04C 540000 M (all)

Recic ESF relay failure of 1A & B RH pumps - manual 9 Pre-load C (all) start required

(N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor

SCENARIO OVERVIEW Unit 1 is at 100% power, steady state, equilibrium xenon, MOL. Online risk is green. CBD @ 221 steps, and boron concentration is 892 ppm. 1BOSR 3.g.4-1, Turbine Throttle and Governor Valve surveillance is scheduled later on in this shift and requires the unit to be ramped to 89% power at 3MW/min. The 1B CS pump is O.O.S. for pump impellor replacement. Grid status is green. Unit status is yellow based on the CS pump work window.

After completing shift turnover and relief, the crew will ramp the unit to 89% power at 3MW/min After the ramp is in-progress, steam generator 1A atmospheric relief valve 1MS018A, will develop a hydraulic leak. The Unit Supervisor will enter Tech Spec 3.7.4, Condition A and Tech Spec 3.6.3, Condition C. The crew will dispatch an operator to close 1MS019A to comply with TS 3.6.3, condition C. 1MS018A will remain unavailable for the remainder of the scenario. On line risk remains green.

After the Unit supervisor makes the TS call, 1PT 508 will fail low causing feed pump speed to rise. The BOP will respond and manual FW pp speed control will be available. AUTOMATIC operation of Feedwater pump speed control will not be available for the remainder of the scenario.

After the 1PT-508 failure has been addressed, 1CV121 will slowly fail in automatic. The RO will take manual control and restore normal charging flow. AUTOMATIC operation of 1CV121 will not be available for the remainder of the scenario.

After the crew has taken actions for the failure of 1CV121, turbine impulse pressure channel 1PT-505 will fail low over a 30 second period. Control rods will begin automatically inserting. After recognizing the instrument failure and checking turbine power stable, the RO will place rod control in manual to stop the inward rod motion. 1BOA INST-2, OPERATION WITH A FAILED INSTRUMENT CHANNEL, Attachment D, will be implemented. The crew will defeat the failed instrument and the RO will restore Tave - Tref deviation. Technical specification 3.3.1, conditions A and P apply.

After the PT-505 failure is addressed, a loss of IB 114 will occur due to a fault on the instrument bus, This will require performance of BOA ELEC-2 to stabilize and recover the plant. The US will address Tech Spec 3.8.9, which requires a shutdown to Hot Standby within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . Several actions will be required as a result of not being able to power the Instrument Bus. These include implementation of 1BOA Instrument 1 for the failed N.I. Channel and dispatching an EO to fail open 1AF005E-H and locally controlling flow as needed or using 1AF013E-H After the Unit Supervisor has evaluated the failed Instrument Bus, 1FW-012C fails open. The BOP will take manual control and restore normal feedwater flow.

After normal feedwater flow is restored and the plant stabilized, a LB LOCA occurs in the 1C hot leg.

The crew will respond utilizing 1BEP-0, 1BEP-1 and will eventually transition to 1BEP ES-1.3 Transfer to Cold Leg Recirculation. 1A and B RH pumps will fail to start on the SI signal but start if a manual start is attempted. The cause of the auto start failure is two ESF relay failures. Additionally, all B Train ESF equipment will NOT auto start due to the failed instrument bus. Containment pressure will rise to the phase B actuation setpoint requiring the RCP to be tripped.

Completion criteria is selection of and transition to 1BEP ES-1.3, Transfer to Cold Leg Recirculation and completion of the first 7 steps.

Page 2

Critical Tasks

1. Manually start at least 1 RH pump.

(ERG Critical Task number - E-0--H)

2. Swap to Cold Leg Recirc.

(ERG Critical Task number - ES-1.3--A)

SIMULATOR SETUP GUIDE:

Verify/perform TQ-BY-201-0113, BYRON TRAINING DEPARTMENT SIMULATOR EXAMINATION SECURITY ACTIONS CHECKLIST.

Establish the conditions of IC 22, 100% power, MOL, steady state, equilibrium xenon.

Complete items on Simulator Ready for Training Checklist.

Verify/remove any Equipment Status Tags and Danger Tags not applicable to the scenario.

Place simulator in RUN (allow simulator to run during board walk down and turnover).

Verify RM-11 is on grid 1. Ensure horns are turned ON. Set BA and PW controllers to Rema numbers or 0 and reset.

Place Turnover and ReMa, 1BGP 100-4T3 and Load Change Instruction Sheet on desk

Ensure Rema placard is updated

Ensure rods are in auto.

Align U-0 CC HX to U-2 to avoid distracting alarm

Place O.O.S. cards on 1B CS pump

Provide candidates with 1BGP 100-4T3, Load Change Instruction Sheet and ReMa In caep NRC 13-1.cae from thumb drive and verify the following:

IMF RP26C

IMF RP28C

Trgset 1 zdi1fw012c(1).gt.0

Trg 1 ramp fwv1fw012c 1 0 7

Trgset 3 zdi1fw012c(1).gt.0

Trg 3 dor zlo1fw012c1

Trgset 5 fwv1fw012c.gt.0.9

Trg 5 ior zlo1fw012c1 off Page 3

INSTRUCTOR/SIMULATOR RUN AID GUIDE Event 1: Ramp to 89% power for TV/GV surveillance SM acknowledge start of ramp when notified.

TSO acknowledge start of ramp when notified.

Event 2: SG PORV 1MS018A inoperable (Tech Spec)

Insert the following from the CAEP and verify the following actuate:

IMF PA0252 ON

IMF PA0253 ON

IOR ZDI1MS018A CLS As SM acknowledge the failure, LCO 3.6.3, condition C and LCO 3.7.4, condition A, and requests for on line risk assessment, maintenance support, and IR initiation.

If dispatched as EO, report 1MS018A has a broken hydraulic line and a small puddle of hydraulic fluid is present beneath the valve.

As WEC supervisor. acknowledge request for EST for 1MS018A C/S, if EST is requested.

If dispatched as EO to close 1MS019A, perform the following:

MRF MS51 0 Event 3: Feedwater header pressure 1PT508 fails low.

As WEC or Extra NSO, acknowledge request to trip bistables.

SM Acknowledge entry into TS SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

SM is to prompt the crew to stop the ramp and place control systems into automatic (specifically Rod Control) if they have not done this previously. SM states his desire to stabilize the plant.

Page 4

Event 4: 1CV121, fails open in auto. Manual control is taken. This valve will remain in manual through out the rest of the scenario.

Initiate event after load ramp down is commenced, with the lead examiners concurrence.

Acknowledge info to SM, WEC, and maintenance.

SDG: CV5 IMF CV10 200 180 134 If the crew decides to isolate 1CV-121 refer to:

SDG: CV5 Throttle Open 1CV8387A and Close 1CV8483A Event 5: Turbine impulse pressure 1PT505 fails low NOTE: Ensure control rods are in AUTO before inserting this MF.

Insert IMF RX10A 0 30 to fail 1PT-505 low over a 30 second period.

If lead examiner desires the bistables tripped, participate in brief and perform the following:

As extra NSO contact Unit 1 (X-2209)

Insert the following:

MRF RP20 OPEN (open protection cabinet #1 door)

MRF RX143 TRIP (trip turbine power P-13 bistable PB505A)

MRF RP20 CLOSE (close protection cabinet #1 door)

If lead examiner desires the AMS bistables tripped, participate in brief and perform the following:

As extra NSO contact Unit 1 (X-2209)

Insert the following:

MRF RX 149 SW12 to TIP1

MRF RP91 Test-Trip Switch to Test-Trip (place operating bypass input switch 11 to test-trip)

Acknowledge as Shift Manager the failure, LCOAR entry, on line risk assessment, EAL evaluation, request for maintenance support, and IR request.

If the Lead Examiner does not desire to see bistables tripped, then inform the crew as Shift Manager when called that the bistables will be tripped when personnel are available in 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ..

Event 6: Event 5 Loss of Instrument Bus 114 Initiate event after event 4 actions are completed, with the lead examiners concurrence. Acknowledge info passed to SM, WEC, and maintenance. When asked, report the bus appears to be damaged and the Inverter 114 AC output breaker is tripped.

SDG: ED7 IMF ED11D SDG FW13 If the crew decides to fail the B train AF005 valves open, utilize the following malfunctions:

IMF FW45E, F, G, and H to 100 (to fail open)

To throttle the same valves use Remote Functions FW161 (E), 162 (F), 163 (G) and 164 (H) to use the Manual Handwheel to the desired position.

Page 5

Event 7: 1C FW pump recirc valve (1FW012C) fails open in auto, manual closure will function Ramp FWV1FW012C I I 08:00:00 Have trigger ramp 1FW012C closed over 7 seconds (stroke time) when CS taken to close If dispatched as EO to investigate 1FW-012C, report valve is responding normally.

SM acknowledge failure, online risk evaluation and IR initiation Event 8: Large Break LOCA with failure of ESF start relays on both RH pumps, requiring manual start, which functions IMF TH04C Large Break LOCA on 1C Hot leg.

SM acknowledge procedure entry and E Plan evaluations.

After entering 1BEP-1, at about step 5, the STA notifies the crew that a red path condition exists and recommends 1BFR P.1 be implemented.

If requested to de-energize 1cv112D and and 1CV112E 112D - MRF ED053O to OPEN 112E - MRF ED071J to OPEN To vary SX flow to U-0 CC HX use sim dwrg SW2 and vary 0SX007 to 40%

If the crew decides to fail the B train AF005 valves open, utilize the following malfunctions:

IMF FW45E, F, G, and H to 100 (to fail open)

To throttle the same valves use Remote Functions FW161 (E), 162 (F), 163 (G) and 164 (H) to use the Manual Handwheel to the desired position Event 9: LOCA 1A and 1B RH pump relay failure requiring manual start (In Preload) IMF RP26C and RP28C to prevent SI auto start of 1A and 1B RH pumps.

Page 6

Scenario No: 001 Event No. 1 Event

==

Description:==

Ramp unit to 89% power Time Position Applicants Actions or Behavior CUE

Provide candidates with 1BGP 100-4T2 or T3, Load Change Instruction Sheet and ReMa US

Implement 1BGP 100-4T2 or T3 for a normal ramp

Instruct RO and BOP to review P, P, L & A of 1BGP 100-4.

Instructs RO to conduct reactivity brief NOTE to Evaluator: The crew should calculate about 125 total gallons of boron to add in about 20 to 40 gallon batches RO

Conducts reactivity brief

Set up boration IAW ReMa and BOP CV-6

Places rods to manual

Energizes PZR back-up heaters

Initiate boration using BOP CV-6 or BOP CV-6T1 checklist

Select STOP on RMCS Makeup Control Switch

Select BORATE on RMCS Mode Select Switch

Enter desired boration amount in BA totalizer

Turn ON RMCS Makeup Control Switch

Verify 1CV110B OPEN

Verify 1CV110A MODULATING

Verify 1AB03P STARTS

Verify proper AB flow on 1FR110

Coordinate boration with start of unit ramp by BOP BOP

Set up DEH for ramp IAW 1BGP 100-4T3

Enter desired ramp rate (3 from ReMa) in the RATE window

Press ENTER

Enter desired MW output (from ReMa) in the REF DEMAND window (1118)

Press ENTER

Press GO/HOLD

Press GO and verify load lowers

Initiate ramp

Coordinate ramp with boration by RO.

EVALUATOR NOTE: When reactivity ramp observation is accomplished and at evaluators cue, the second event will be inserted.

Comments:

Byron NRC Scenario-1 Page 7

Scenario No: 001 Event No. 2 Event SG PORV 1MS018A inoperable

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator S/G 1A PORV TROUBLE (1-15-A10).

SER 0252, 1A PORV HYDRAULIC FLUID RESERVOIR LOW.

SER 0253, S/G PORV 1A ACCUMULATOR PRESSURE LOW.

BOP o Identify/report trouble alarm on 1MS018A.

o Refer to BAR 1-15-A10.

o Dispatch operator to 1MS018A.

Place 1MS018A C/S in close at 1PM04J to stop hydraulic pump.

Request Equipment Status Tag for 1MS018A.

RO

Assist BOP as requested. Refer to BARs as available.

Monitor reactivity changes

Adjust reactivity with turbine ramp o Rods o Boron US

Identify entry conditions for TS 3.7.4, condition A Restore to Operable in 30 days

Identify entry conditions for TS 3.6.3, condition C.: Close 1MS019A in 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months and verify closed once per 31 days

Direct operator to close 1MS019A US

Inform SM of 1MS018A status, TS Status, request IR, On Line Risk Assessment, maintenance support, and clearance order/EST for 1MS019A.

EVALUATOR NOTE: After the actions for the 1MS018A failure are complete and with lead examiners concurrence, insert the next event.

Comments:

Byron NRC Scenario-1 Page 8

Scenario No: 001 Event No. 3 Event 1PT508 fails LOW

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator SG 1_ FLOW MISMATCH FW FLOW LOW (1-15-A4/B4/C4/D4)

FWRVs (1FW510/20/30/40) closing

1B/1C FW turbine speed rising

1A/B/C/D SG levels rising

Master Feed Pump Speed controller output rising RO/

Determine 1PT508 is failing LOW BOP

Reference BARs as time permits BOP

Determine all SG levels are rising

Take manual control of Feed Pump Speed Master Controller Individual Feed Pump Speed Controllers

Lower feed pump speed to recover S/G levels Uses alternate pressure indication (1PI-FW015)

Establishes proper d/p for power level using alternate indication per placard Remove controller integral by momentarily going to manual on each FWRV US

Notify SM of PT-508 failure, request IR, and maintenance.

CREW

Check SG levels normal and stable NOTE: FW pp speed control will be in manual for the remainder of the scenario NOTE: Ensure ramp is stopped and rods are placed back in auto before continuing.

EVALUATOR NOTE: After the actions for PT-508 are complete and with Lead Examiner concurrence, insert event 4.

Comments:

Byron NRC Scenario-1 Page 9

Scenario No: 001 Event No. 4 Event 1CV121 fails open in auto.

==

Description:==

Time Positio Applicants Actions or Behavior n

CUES: Annunciators:

1-9-D3 CHG LINE FLOW HIGH LOW

1FI-121A Charging Header Flow rising o 1LI-112 VCT level lowering RO

Place 1FK-121 in MANUAL

Lower charging flow

Balance charging flow with letdown to restore and stabilize Pzr level

Identify/report failure of 1CV-121 Comments:

Byron NRC Scenario-1 Page 10

Scenario No: 001 Event No. 5 Event 1PT505 fails low

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator 1-14-D1, TAVE CONT DEV HIGH

1PI-505, first stage pressure, indication lowering.

Bypass Permissive C-5 Turbine Low Power annunciates

Bypass Permissive C-20 AMS Permissive annumciates

Control rod inward motion.

1TR-0412, Auct Tave/Tref recorder, Tref indication dropping

1SI-412, Rod Speed, indicates 72 step per minute

Steam Dump Actuated light LIT on 1PM02J RO/BO

Perform the following at 1PM05J:

P

Determine control rods inserting.

Identify 1PT-505 is failing low.

Report failure to US

Determine turbine power stable at 1PM06J or OWS drop 210.

Place rod bank select switch to manual at 1PM05J to stop uncontrolled rod insertion.

CREW

Reference BARs 1-14-D1.

Identify entry conditions for 1BOA INST-2, OPERATION WITH A FAILED INSTRUMENT CHANNEL.

o The crew may enter 1BOA ROD-1, Uncontrolled Rod Motion, if they do, the steps they will take are italicized below

Check turbine power stable

Check Rods in manual, if not place in manual

Check power range N.I.s operable

Check Tave instruments operable

Check Turbine first stage pressure operable

Go to 1BOA Inst. 2 Operation with a failed Instrument Channel, Attachment D US

Notify SM of plant status and procedure entry

Request evaluation of Emergency Plan conditions

Implement 1BOA INST-2 "OPERATION WITH A FAILED INSTRUMENT CHANNEL",

Attachment D "TURBINE IMPULSE PRESSURE CHANNEL FAILURE" and direct operator actions of 1BOA INST -2 to establish the following conditions.

RO/BO

Restore steam dumps.

P

Check C-7 bypass permissive NOT LIT at 1PM05J.

Perform the following at 1PM02J:

Place 1PK-507, MS header pressure controller, in manual.

Lower 1PK-507 demand to 0%.

Place steam dump mode select switch to STM PRESS mode.

Comments:

Byron NRC Scenario-1 Page 11

Scenario No: 001 Event No. 5 Event 1PT505 fails low

==

Description:==

Time Position Applicants Actions or Behavior

Place 1PK-507 in auto.

Check reactor power <100 % on NIs

Defeat 1PT-505 at 1PM05J

Place 1PS505Z, turbine impulse pressure defeat C/S, to DEFEAT 505 RO

Check if rod control can be placed in auto

Check C-5 bypass permissive LIT at 1PM05J.

Check Tave/Tref stable and within 1°F.

1TR-412 at 1PM05J

PPC display o Adjust Tave - Tref within 1°F by manually withdrawing control rods at 1PM05J Place rod bank select switch in AUTO.

RO/

Check P13 interlock BOP

Turbine power > 10%

Check P-13 bypass permissive NOT LIT at 1PM05J NOTE to Evaluator: The next 4 steps may be bypassed for tripping by bistables and then go directly to the Tech Spec. portion of the exam at the end of this page.

US Direct or perform pre-job brief per HU-AA-1211 for bistable tripping.

Extra o Locally trip bistable for PT-505/BOP verifies correct bistable operation at 1PM05J.

NSO/ o PB505A - C1-742 BS-1.

BOP Extra

Check status of AMS system NSO

Operating Bypass switch in OFF locally.

Extra

Locally trip bistables for AMS/BOP verifies correct bistable operation at 1PM05J.

NSO/

Place Operating Bypass switch to TIP-1 locally.

BOP

Place Operating Bypass Input to TEST-TRIP locally.

US

Determine TS 3.3.1 conditions A and P are applicable:

Condition A: Enter table immediately

Condition P: Verify interlock is in required state for existing unit conditions in 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months or be in MODE 2 in 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months .

Contact SM to perform risk assessment, initiate IR, and contact maintenance to investigate/correct instrument failure and rod control malfunction NOTE: After the actions for the turbine impulse pressure channel failure are complete and with Lead Examiners concurrence, insert event 6.

Comments:

Byron NRC Scenario-1 Page 12

Scenario No: 001 Event No. 6 Event Loss of Instrument Bus 114

==

Description:==

Time Position Applicants Actions or Behavior CUES: Annunciators:

1-3-D7 AF FLOW CONT VLV SETTING LOW

1 D5 BUS 114 INVERTER TROUBLE and numerous (6) others on this alarm module.

1-10-A3 PWR RNG HIGH STPT RX TRIP ALERT and numerous (7) others on this module.

1-12-C1 PZR PRESS CONT DEV LOW HTRS ON

1-13-A2 RCP BUS UNDERVOLTAGE RX TRIP ALERT

1-13-B2 RCP BUS UNDERFREQUENCY RX TRIP ALERT

1-13-D3 RCP 1D BRKR OPEN OR FLOW ALERT

1-18-A4 TURB STOP VLV CLOSED ALERT

1-18-E16 C-16 STPT EXCEEDED

The right side of 1PM07J (NIs) is DARK including PR N44 RO/US Identify/report failure of Instrument Bus 114.

US Refer to 1BOA ELEC-2 for operator actions RO/ Verify control channels are operable for BOP

PZR pressure

PZR level

Tave

Delta-T

P Impulse

SG level

Steam flow

Feed flow US o Rods to Manual RO Comments:

Byron NRC Scenario-1 Page 13

Scenario No: 001 Event No. 6 Event Loss of Instrument Bus 114

==

Description:==

Time Position Applicants Actions or Behavior RO/US

Prepare to energize Bus 114 from the CVT: (Directing EO actions in the field)

Verify OPEN

Inverter 114 Output breaker

Bus 114 Main feed breaker

Verify CLOSED Instr. Bus 114 CVT Feed bkr

Close Inst. Bus 114 CVT Input bkr

NOTE: EO will report BUS DAMAGE

Contact EMD to investigate damage to bus 114.

Notify Shift Manager

Perform actions associated with 1BOA INST see next step.

Refer to Tech Specs 3.8.9 Condition B for action

Condition B: Restore I.B. in 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months (if not restored go to Cond. D)

Condition D: If Condition B not met, be in Mode 3 in 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and Mode 5 in 36 hrs.

Direct local Inverter 114 shutdown.

Review Table D impacts for loss of Inst Bus 114 (Below is a portion of the list that will be impacted at this time.)

o Train B ESF loads will require manual actuation and no reset.

o Rods will not withdraw in Manual o PORV 1RY455A will not open in Auto o VCT Auto makeup will not occur.

o 1AF005E-H will close as soon as flow starts and cannot be controlled from the MCR.

o 1SD054A-D, SD Blowdown failed closed o RCPs 1D and 1B Seal Leakoff Flow Recorders are inoperable o 1PR-403, RC WR Pressure recorder is inoperable o PR N44 is lost o SR audio counts are lost o Several TSLBs lit and 1PM05J CRTs are lost NOTE: Actions in 1BOA INST-1 are contained on the next page (IF evaluator deems this action is necessary). These can be deferred to a request for additional NSOs to assist.

With the bus damaged, this is directed action as part of this BOA action.

If action is taken in 1BOA Inst-1, the first 6 steps are included on the next page.

The steps to remove computer points from scan (step 7) and the bypassing or tripping of bistables associated with the failed channel have intentionally been omitted from this document Comments:

Byron NRC Scenario-1 Page 14

Scenario No: 001 Event No. 6 Event Loss of Instrument Bus 114

==

Description:==

Time Position Applicants Actions or Behavior BOA INST-1 Actions

Rod Bank Selector switch to Manual

Check for Rod Stop

PWR RNG FLUX HIGH ROD STOP -LIT

Place Rod stop bypass switch for N-44 on 1PM07J in BYPASS

Check Tave-Tref stable and within 1°F o Adjust rods/boron/turbine load as necessary

SG levels NORMAL

Bypass/Defeat PR Channel Functions at 1PM07J

Upper section and Lower section Current Comparator

Misc Control and Indication section

Power mismatch bypass

Rod stop bypass

Camparator and Rate Panel

Comparator Channel Defeat

Check Flux Rate Trip Alarm

Reset N-44 at 1PM07J The crew may fail air to the 1AF-005E-H and direct an EO to locally throttle these valves using the associated handwheels, if needed.

BOP Monitor plant for effects, address BARs, and take any actions directed by the US NOTE: When actions have been completed to respond to loss of Inst Bus 114 and Lead Evaluators concurrence, Event 7 is entered.

Comments:

Byron NRC Scenario-1 Page 15

Scenario No: 001 Event No. 7 Event 1FW012C fails open

==

Description:==

Time Position Applicants Actions or Behavior EVALUATOR NOTE: Depending on how far the crew has ramped the unit, will determine if all actions listed below will occur. The automatic actions associated with FW pp NPSH low alarm will only occur if FW pump suction pressure reaches 400 psig CUE

Annunciator 1-16-D2, FW PUMP DISC FLOW HIGH

Annunciator 1-16-E1, FW PUMP NPSH LOW

Annunciator 1-15-A/B/C/D4, SG 1_ FLOW MISMATCH FW FLOW LOW

Open light lit on 1FW012C

FW flow to all SG LOWERING

SG level LOWERING o FWRVs OPENING BOP

Recognizes 1C FW pp recirc valve, 1FW12C, OPEN

Takes 1FW012C control switch to close CREW o Review BARs

Monitor primary and secondary panels as BOP responds to FW malfunction BOP o Reviews automatic actions for NPSH LOW annunciator o Standby Cond/Cond Bstr pump STARTS o 1CD157A/B, GS Cond. Bypass valves, OPEN o 1CD152, Cond. PPs Recirc Valve CLOSES o 1HD046A/B, Heater Drain PP Combined Disch. Valves OPEN US

Notify SM for IR EVALUATOR NOTE: After the actions to close 1FW012C are complete and with lead examiners concurrence, insert event 8.

EVALUATOR NOTE: If the crew trips the unit based on the FW transient the LOCA will be inserted at step 2 of 1BEP ES 0.1. The first 4 steps of 1BEP-0 along with the transition to ES 0.1 step 2 are included below.

CUE

Reactor Trip first out annunciator

Rod Bottom Lights

Automatic or manual reactor trip CREW

Identify entry conditions for 1BEP-0, REACTOR TRIP OR SAFETY INJECTION US

Notify SM of plant status and procedure entry

Request evaluation of Emergency Plan conditions

Enter/Implement 1BEP-0 and direct operator actions of 1BEP-0 RO Perform immediate operator actions of 1BEP-0:

Step 1: Verify reactor trip

Rod bottom lights - ALL LIT

Reactor trip & Bypass breakers - OPEN Comments:

Byron NRC Scenario-1 Page 16

Scenario No: 001 Event No. 7 Event 1FW012C fails open

==

Description:==

Time Position Applicants Actions or Behavior

Neutron flux - DROPPING BOP Perform immediate operator actions of 1BEP-0:

Step 2: Verify Turbine Trip

All Turbine throttle valves - CLOSED

All Turbine governor valves - CLOSED

Step 3: Verify power to 4KV busses

ESF Buses - BOTH ENERGIZED (141 & 142)

CREW

Check SI Status

SI First OUT annunciator -NOT LIT

SI ACTUATED Permissive Light - NOTLIT

SI Equipment - NOT ACTUATED

Check if SI is required o Pzr Press > 1829 psig o Steam Line Press > 640 psig o Cont. Pressure < 3.4 psig Crew

Transition to 1BEP ES-0.1 Reactor Trip Response, step 1 US

Notify SM of plant status and procedure entry

Request evaluation of Emergency Plan conditions

Enter/Implement 1BEP ES-0.1 and direct operator actions

Request STA to monitor Status Trees RO

Check RCS Average Temperature stable or trending to 557 degrees

Check Shutdown reactivity status

Rod bottom lights-All Lit

RCPs- Any Running EVALUATOR NOTE: If the crew tripped due to the feedwater transient, then initiate the next event (Large Break LOCA).

Comments:

Byron NRC Scenario-1 Page 17

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior CUE

Pzr level is dropping

Annunciator CNMT PRESS HIGH (0-33-D6) is LIT

Automatic reactor trip and/or safety injection actuation CREW

Identify entry conditions for 1BEP-0, REACTOR TRIP OR SAFETY INJECTION US

Notify SM of plant status and procedure entry

Request evaluation of Emergency Plan conditions

Enter/Implement 1BEP-0 and direct operator actions of 1BEP-0 RO Perform immediate operator actions of 1BEP-0:

Step 1: Verify reactor trip

Rod bottom lights - ALL LIT

Reactor trip & Bypass breakers - OPEN

Neutron flux - DROPPING BOP Perform immediate operator actions of 1BEP-0:

Step 2: Verify Turbine Trip

All Turbine throttle valves - CLOSED

All Turbine governor valves - CLOSED

Step 3: Verify power to 4KV busses

ESF Buses - BOTH ENERGIZED (141 & 142)

CREW

Check SI Status

SI First Out annunciator -LIT

SI ACTUATED Permissive Light -LIT

SI Equipment - ACTUATED

Either SI pump - RUNNING

Either CV pump to cold leg isolation valve - OPEN - 1SI8801A Note: examinee may open 1SI8801B at this time

Recognize SI Actuated

Manually actuate SI from 1PM05J AND 1PM06J US

Step 5: Direct BOP to perform Attachment B of 1BEP-0 EVALUATOR NOTE: US and RO will continue in 1BEP-0 while BOP is performing Attachment EVALUATOR NOTE: The crew may identify 1A/B RH pumps are not running and may start them before step 6.

If evaluating either the SRO or RO move to step 6 on page 19 BOP Attachment B actions for the BOP are as follows:

Verify FW isolated at 1PM04J:

FW pumps - TRIPPED.

Isolation monitor lights - LIT.

FW pumps discharge valves - CLOSED (or going closed) 1FW002A-C.

Comments:

Byron NRC Scenario-1 Page 18

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

Verify DGs running at 1PM01J:

DGs - BOTH DG running

1SX169A & B OPEN.

Dispatch operator locally to check operation

Verify Generator Trip at 1PM01J:

OCB 3-4 and 4-5 open.

PMG output breaker open.

BOP

Verify Control Room ventilation aligned for emergency operations at 0PM02J:

VC Rad Monitors - LESS THAN HIGH ALARM SETPOINT.

Operating VC train equipment - RUNNING.

Supply fan

Return fan

M/U fan

Chilled water pump

Chiller

Operating VC train dampers - ALIGNED.

M/U fan outlet damper - NOT FULLY CLOSED.

VC train M/U filter light - LIT.

Operating VC train Charcoal Absorber aligned for train B.

Bypass damper - CLOSED

Inlet damper - OPEN

Outlet damper - OPEN

Control Room pressure greater than +0.125 inches water on 0PDI-VC038.

Verify Auxiliary Building ventilation aligned at 0PM02J:

Two inaccessible filter plenums aligned.

Plenum A or B or C:

Fan - RUNNING

Flow Control damper - OPEN

Bypass Isolation damper - CLOSED

Plenum A or B or C:

Fan - RUNNING

Flow Control damper - OPEN

Bypass Isolation damper - CLOSED

Check 1 AB exhaust fan running for every running supply fan

Verify 1 FHB ventilation aligned at 0PM02J:

Fan - RUNNING

Inlet Isolation damper - OPEN Comments:

Byron NRC Scenario-1 Page 19

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

Flow Control damper - OPEN

Bypass Isolation damper - CLOSED EVALUATOR NOTE: The remaining steps of Attachment B may be designated to be performed by WEC personnel or the Field Supervisor and extra operators.

o Trip all running HD Pumps o Shutdown FW pump as necessary using BOP FW-2 for a TDFP or BOP FW-8 for the MDFP o Shutdown unnecessary CD/CB Pumps using BOP CD/CB-2 o Maintain UHS basin level greater than 80%

o Align SX MDCT per BOP SX-T2 o Maintain SX Basin level > 80%

o Align NDCT o Verify CW intake bay level within band o Dispatch operator to locally verify NDCT basin level acceptable o Align NDCT per BOP CW-25 o Shutdown all unnecessary CW pumps per BOP CW-2 o Initiate periodic checking of spent fuel cooling o Locally verify Spent fuel pool level is > 420 Elev o Locally verify SFP temperature stable o Notify STA of SFP cooling status Notify US that Attachment B is complete and actions taken RO/

Step 6: Verify ECCS pumps running BOP

Both CV pumps - RUNNING

[CT]

Manually start 1B CV pump due to loss of I.B. 114 E-0--J

Both RH pumps - RUNNING

Manually start 1A and 1B RH pumps prior to completion of step 6 of 1BEP-0.

Both SI pumps - RUNNING

Manually start 1B SI pump due to loss of I.B. 114 BOP/

Perform the following at 1PM06J:

RO

Step 7: Verify RCFCs running in Accident Mode:

Group 2 RCFC Accident Mode lights - 4 LIT.

STOP 1B RCFC is Fast Speed

CLOSE CNMT chiller inlet and outlet valves 1SX112B and 1SX114B

OPEN CNMT chiller bypass valve o OPEN RCFC inlet and outlet valves 1SX016B and 1SX027B

START B and D RCFCs in LO speed

Step 8: Verify Phase A isolation:

Group 3 Cnmt Isol monitor lights - ALL LIT. NOTE: NOT MET Comments:

Byron NRC Scenario-1 Page 20

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

Manually Actuate CNMT ISOL Phase A o Manually close valves o Any valve outside of CNMT locally CLOSE while continuing with step 9

Step 9: Verify Cnmt Vent isolation:

Group 6 Cnmt Vent Isol monitor lights - ALL LIT.

o Verify MSIV and Bypass Valves - CLOSED BOP/

Step 10: Verify AF system:

RO

AF pumps - BOTH AF pumps RUNNING. Note: B pump is NOT

Start 1B AF pump

AF isolation valves - 1AF13A-H OPEN.

AF flow control valves - 1AF005A-H THROTTLED. (NOTE: unless manual action is taken 1AF005E-H will be closed due to loss of IB 114)

Step 11: Verify CC pumps - BOTH RUNNING.

Start 1B CC pump

Step 12: Verify SX pumps - BOTH RUNNING.

Start 1B SX pump

Step 13: Check if Main Steamline Isolation -required:

o All S/G pressures > 640 psig (at 1PM04J).

o CNMT pressure > 8.2 psig.

Crew o Verify MSIVs and Bypass valves closes o Announces containment is adverse EVALUATORS NOTE: CS may have an actuation signal at this time. If it has not, the crew must return to this step to verify proper alignment when CNMT pressure exceeds 20 psig BOP/

Step 14: Check if CS is required.

RO

CNMT pressure has risen > 20 psig.

Group 6 CS monitor lights - ALL LIT. NOTE: B Train NOT LIT

Manually actuate CS and Phase B Isolation- 2 out of 2 switches at (at least) 1 out of 2 locations o Go to Attachment C o Check 1CS001B OPEN o Open 1CS007B o Open 1CS019B by:

o Place 1 CS pump test switch in TEST o Manually open 1CS019B o Place CS pump test switch in NORMAL o Open 1CS010B

Check one CS pump running Comments:

Byron NRC Scenario-1 Page 21

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

CHECK At Least 1 CS pump running

Returns to step 14c, page 10 of 1BEP-0

Group 6 phase B lights - ALL LIT. NOTE: B train NOT LIT o Manually actuate CS and Phase B Isolation- 2 out of 2 switches at 1 out of 2 locations o Manually CLOSE o 1CC9413B o 1CC685 o 1CC9414

Verify/Stop ALL RCPs (at 1PM05J).

CS eductor suction flow - > 15 gpm on 1FI-CS013.

CS eductor additive flow - > 5 gpm on 1FI-CS015.

BOP

Align SX Towers

8 Riser valves OPEN

OPENS 0SX163C and D

All 4 Bypass valves CLOSED

8 fans running in HIGH speed

Starts 0G Fan in Hi-speed BOP/

Step 15: Verify Total AF flow:

RO

AF flow > 500 gpm

S/G NR levels - NOT rising in an uncontrolled manner and between 31 and 50%

RO/

Step 16: Verify ECCS valve alignment BOP

Determine Group 2 Cold Leg Injection monitor lights required for injection - NOT All lit o Manually aligns valves as necessary RO/

Step 17: Verify ECCS flow BOP

High Head SI flow >100 gpm (1FI-917)

RCS pressure < 1700 psig

SI pump Discharge flow greater than 200 gpm

RCS pressure < 325 psig

RH flow > 1000 GPM RO

Step 18: Check PZR PORVs and SPRAY VALVES at 1PM05J:

1RY455 & 1RY456 CLOSED

PORV isol valves - 1RY8000A & 1RY8000B BOTH ENERGIZED

PORV relief path - Both PORVs in AUTO, Both isolation valves - OPEN. (NOTE:

1RY455A will NOT operate in Auto because I.B. 114 is de-energized)

Normal PZR Spray Valves CLOSED RO

Step 19: Maintain RCS temperature control at 1PM05J:

Comments:

Byron NRC Scenario-1 Page 22

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

Check RCPs - NONE RUNNING.

Verify RCS average temperature stable at or trending to 557oF.

Throttle AF maintaining >500 GPM until SG minimum level is met

MSIVs closed RO

Step 20: Check status of RCPs at 1PM05J:

o All RCPs - NONE RUNNING.

o Any RCPs still running - TRIP All RCPs BOP/

Step 21: Check if SG secondary pressure boundaries are intact at 1PM04J:

RO

Check pressure in all SGs:

None dropping in an uncontrolled manner.

None completely depressurized.

BOP/

Step 22: Check S/G tubes are intact at RM-11 console:

RO

1PR08J SG Blowdown.

1PR27J SJAE/GS.

1AR22/23A-D Main steam Lines.

CREW

Step 23: Determine RCS is NOT intact:

o CNMT area rad monitors > alert alarm setpoint at RM-11 console.

o CNMT pressure > 3.4 psig (1PI-CS 934-937) at 1PM06J.

o CNMT floor drain sump level > 46 inches (1LI-PC002/003) at 1PM06J.

CREW Transition to 1BEP-1, LOSS OF REACTOR OR SECONDARY COOLANT EVALUATORS NOTE: The crew will transition to 1BEP ES-1.3 when RWST Lo-2 level (<46%) is reached. May occur before step 13. 1BEP ES-1.3 actions are listed in italics below.

US

Notify SM of plant status and procedure entry

Request evaluation of Emergency Plan conditions

Enter/Implement 1BEP-1 and direct operator actions of 1BEP-1 RO

Step 1: Check Status of RCPs:

RCPs - NONE RUNNING RO/

Step 2: Check if SG secondary pressure boundaries are intact:

BOP

Check pressure in all SGs:

None dropping in an uncontrolled manner

None completely depressurized

Step 3: Check intact SG levels

SG levels maintained between 10% (31%) and 50%

SG NR levels - NOT rising in an uncontrolled manner

Step 4: Check secondary radiation normal.

Reset Phase A

Depress BOTH Phase A Reset Pushbuttons at 1PM06J

OPEN 1SD005A-D at 1PM11J

At RM-11 or HMI Check secondary rad trends on :

Comments:

Byron NRC Scenario-1 Page 23

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

1PR08J SG Blowdown

1PR27J SJAE/GS

1AR22/23A-D Main steam lines

Secondary activity samples (when available)

RO

Step 5: Check at least ONE PZR PORV relief path available:

PORV isol valves - BOTH ENERGIZED

PORVs closed

PORV relief path - BOTH PORVs in AUTO, 1RY8000A & B - OPEN EVALUATORS Prompt booth to have the STA report a RED PATH exists for 1BFR P-1.

US

When informed of the red path on 1BFR-P.1 the U.S. should

Inform the SM of the transition to P.1 and request evaluation of the Emergency Plan

Direct crew actions contained below in italic RO

Check RCS pressure greater than 325 psig

Check RH flow Greater than 1000 GPM US

Transitions back to 1BEP-1 Step 6

Informs SM of procedure transition and requests evaluation of Emergency Plan.

Direct crew actions beginning at step 6 CREW

Step 6: Check if ECCS flow should be reduced

RCS subcooling - NOT acceptable CREW

Step 7: Check if CS should be stopped

Both CS pumps -1 RUNNING

Reset CS signal

Check Spray Add Tank Lo-2 lights - NOT lit

CS termination criteria NOT met - for LOCA, operating time at least 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months CREW

Step 8: Check if RH pumps should be stopped

Reset SI

Depress BOTH SI Reset Pushbuttons at 1PM06J

Verify SI ACTUATED BP light NOT lit at 1PM05J

Verify AUTO SI BLOCKED BP light lit at 1PM05J

RCS pressure - NOT> 325 psig & stable CREW

Step 10: Check if DGs should be stopped o Stop DGs and place in standby CREW

Step 11: Initiate evaluation of plant status

Check cold leg recirc capability - BOTH trains available

Check AB rad trends normal

Obtain samples o Place H2 monitors in service per BOP PS-9 Comments:

Byron NRC Scenario-1 Page 24

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

Evaluate equipment for long term recovery

Shutdown chiller on non-operating VC trains o Start additional plant equipment as required CREW

Step 12: RCS pressure - NOT > 325 PSIG

RH pump flow > 1000 GPM CREW

Step 13: Check if transfer to 1BEP ES-1.3 required o RWST level - < 46%

o ECCS - aligned in injection mode o Identify need to perform 1BEP ES-1.3 US

Transition to 1BEP ES-1.3, Cold Leg Recirculation

Notify SM of procedure entry and request EAL evaluation EVALUATOR NOTE: If at any time RWST level lowers to 9% any pump taking suction on the RWST must be taken to PTL CREW

Check/Open 1CC9473A & B

Check 2 CC Pumps - running

Open 1CC9412A & B

Check CC to RH HX flows - >5000GPM

Check CNMT floor water level - at least 13 inches CREW

Place control switches for SVAG Valve 480V busses - CLOSE

[CT]

Check both RH pumps - running ES-1.3 -

Check both 1SI8811A & B - OPEN (1SI8811B is NOT)

-A

Goes to Step 4 of Attachment A

1SI8811B NOT fully open o Check B RH pp running o Check 1SI8811B Energized

Place 1B RH pump in PTL

Close 1SI8812B o Place 1B CS pp in PTL o Close 1CS001B

Open 1SI8811B

Start 1B RH pump o Reopen 1CS001B- This valve is O.O.S.

o Restart 1B CS pp- The pump is O.O.S.

Check 1 Train of Cnmt Sump recirc established

Return to main body step 4 page 8

Check SI pump- any running

Check 1SI8801A or B open: CHG pp to Cold Leg Injection valves CREW

Align SI and CV pumps for cold leg recirc (Step 5)

Verify closed: (CV pp mini-flows) 1CV8111, 1CV8114, 1CV8110, 1CV8116

Close SI pump mini-flow valves 1SI8813, 1SI8814, 1SI8920 Comments:

Byron NRC Scenario-1 Page 25

Scenario No: 001 Event No. 8 Event Large Break LOCA with failure of 1A and B RH pumps to automatically start

==

Description:==

Time Position Applicants Actions or Behavior

Close (RH HX disc. X-tie vlvs) 1RH8716A & B

Open/verify open (SI & CV pp suct. Hdr x-tie vlvs) 1SI8807A & B, 1SI8924

Check 1A RH Pump running

Open (RH HX to CV pps) 1CV8804A

Check 1B RH Pump running

Open (RH HX to SI pps) 1SI8804B

Start CV pumps and SI pumps as necessary EVALUATOR NOTE: The scenario can be terminated after the first 6 steps of 1BEP ES-1.3 are completed or at lead examiners discretion.

Comments:

Byron NRC Scenario-1 Page 26

Facility: _Byron Nuclear Station Scenario No.: __2__ Op-Test No.: _2013301_

Examiners: _D. McNeil__________________ Operators: _____________________________

_R. Baker___________________ _____________________________

B. Palagi Initial Conditions: __IC-18, 75% power, steady state, MOL________________________________________

Turnover: Unit 1 is at 75% power, steady state, MOL, CB D is @ 172 steps and boron concentration is 950 ppm. Online risk is green. Crew is to switch Bus 156 from SAT to UAT following ACB 1561 maintenance.

1D CD/CB pump is OOS for maintenance.____________________________________

Event Malf. No. Event Event No. Type* Description ZDI 1CD05PD PTL ZLO1CB113DOPN 1D CD/CB pp O.O.S.

OFF 1D CD/CB pp O.O.S.

ZLO1CB113DCLS 1D CD/CB pp O.O.S.

OFF 1D CD/CB pp O.O.S.

Preload ZDI1CB113D CLS 1D CD/CB pp O.O.S.

ZDI1CD05PDB PTL Rx trip breaker fails to open IMF RP02A Rx trip breaker fails to open IMF RP02B Turbine fails to AUTO trip from Rx trip IMF TC03 Manual Turbine trip PB fails to trip turbine ZDIHSTG010 NORM N

1 Switch Bus 156 Electrical Lineup (BOP,SRO)

TS (SRO) 2 None Notified that 1A SI pump failed ASME surveillance I (RO, SRO) 3 MF RX18A 630 1A TCOLD RTD fail High TS (SRO) 4 MF CV16 0 I (RO, SRO) VCT Level Channel LT-112 Fail Low C

1C CD/CB pp Trip requiring entry to 1BOA SEC-1 and 5 IMF FW22C (BOP,SRO)

Turbine Runback R (RO, SRO) 6 IMF RX04D 0 30 I (BOP,SRO) Feedwater flow channel 1FT-521 fails Low 7 MF CH08 60 120 TS (SRO) CNMT Pressure 1PT-936 Fail High ATWS 8 MF TH16C M (ALL) 1C RCP Trip with Rx Trip Breakers Fail To Open Failure of Main Turbine to Trip on auto signal or manual 9 Pre-load C (ALL) push button

(N)ormal, (R)eactivity (I)nstrument, (C)omponent, (M)ajor Transient

SCENARIO OVERVIEW Unit 1 is at 75% power, steady state, MOL, CB D is @ 172 steps and boron concentration is 950 ppm. Online risk is green. Crew is to switch Bus 156 from SAT to UAT following ACB 1561 maintenance. 1D CD/CB is OOS for maintenance.

After completing shift turnover and relief, the crew is directed to switch Bus 156 from SAT to UAT following ACB 1561 maintenance using 1BGP 100-3, Step F.43 for reference.

During the Bus power supply swap, the Unit Supervisor will be called by Engineering stating that after reviewing the previously run ASME surveillance the 1A SI pump has failed the acceptance criteria. Entry into Tech Spec 3.5.2 Condition A will be made.

After the Unit Supvr makes the TS call, 1A Tcold RTD fails high, requiring entry to 1BOA Inst-2, Operation with a Failed Instrument Channel. This will require entry into Tech Specs by the SRO.

Entry into Tech. Spec. 3.3.1 Condition A and E is made.

After 1BOA Inst-2 is exited, VCT Level channel 1LT-112 fails low. RMCS auto makeup will start, and the crew will have to place the Makeup Mode Select switch to Off. Any required makeup will have to be done in Manual for the remainder of the scario..

After the level channel failure has been addressed, the 1C CB/CB pump will trip. The crew will enter 1BOA SEC-1, Secondary Pump Trip, Unit 1, attachment B. A reduction in turbine load, via runback will be required.

After the run back is complete and the unit has been stabilized, the controlling feedwater flow channel on the 1B SG fails low. The BOP will take manual control of feedwater flow. 1BOA INST 2, OPERATION WITH A FAILED INSTRUMENT CHANNEL, Attachment G, will be implemented. The BOP will restore feedwater flow control to automatic when SG level is restored to normal. On line risk remains green.

After the level channel failure has been addressed, CNMT pressure channel 1PT-936 fails high.

This has no immediate required actions, but the US will be responsible to evaluate Tech Specs.

Crew will enter 1BOA Inst-2, Operation with a Failed Instrument Channel to address the failure. Entry into TS 3.3.2, conditions A, D & E is applicable.

After the CNMT pressure channel failure has been addressed, the 1C RCP trips. When the crew attempts to trip the reactor, the trip breakers will fail to open. The manual Turbine trip P.B. will also malfunction. The turbine can be tripped via the electronic turbine trip feature associated with DEHC.

The crew will enter 1BFR S.1, ATWS. At step 16, the crew will be directed to return to 1BEP-0, Reactor Trip or Safety Injection.

Completion criterion is transition to 1BEP-0, Reactor Trip or Safety Injection. The lead evaluator may end the scenario at the transition.

Byron ILT NRC 13-2 Page 2

Critical Tasks

1. Isolate the main turbine from the SGs before plant- and scenario-specific criteria are exceeded.

(ERG Critical Task number - FR-S.1--A) (K/A: EPE029EA1.13 - IR: 4.1/3.9)

2. Start AFW pumps before plant- and scenario-specific criteria are exceeded.

(ERG Critical Task number - FR-S.1 -- B) (K/A: EPE029EA1.15 - IR: 4.1/3.9)

3. Insert negative reactivity into the core by at least one of the following methods before completing the immediate-action steps of FR-S.1:

De-energize the control rod drive MG sets

Insert RCCAs

Establish emergency boration flow to the RCS (ERG Critical Task number - FR-S.1 -- C) (K/A: EPE029EA1.12 - IR: 4.1/4.0)

SIMULATOR SETUP GUIDE:

Verify/perform TQ-BY-201-0113, BYRON TRAINING DEPARTMENT SIMULATOR EXAMINATION SECURITY ACTIONS CHECKLIST.

Establish the conditions of IC 18, 76% power, MOL, steady state.

Complete items on Simulator Ready for Training Checklist.

Verify/remove any Equipment Status Tags and Danger Tags not applicable to the scenario.

Place simulator in RUN (allow simulator to run during board walk down and turnover).

Verify RM-11 is on grid 1, Ensure horns are turned ON. Set BA and PW controllers to Rema numbers or 0 and reset.

Place C/O tags on the 1D CD/CB pump C/S, its aux oil pump C/S, discharge valve C/S, and recirc valve C/S.

Place Bus 156 on SAT.

Ensure 1B SG FW Flow Channel is selected to F-521

Place simulator in RUN and divert 1CV112A to get to approximately 39% VCT level.

Open cae file: NRC 13-2.cae Byron ILT NRC 13-2 Page 3

INSTRUCTOR/SIMULATOR RUN AID GUIDE Event 1: Switch Bus 156 Electrical Lineup Event 2: Unit Supervisor is notified that 1A SI pump has failed ASME acceptance criteria listed in 1BOSR 5.5.8.SI.5-1a SM acknowledge T/S 3.5.2 entry conditions Event 3: 1A Tcold RTD Failed High IMF RX18A 630 As SM Acknowledge procedure entry and request for Emergency Plan evaluations.

As SM Acknowledge entry into TS 3.3.1 As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

As SM Inform US that bistables will be tripped when personnel are available As WEC or Extra NSO, acknowledge request to trip bistables, if Lead Examiner desires At 1PA01J:

To open protection cabinet 1, MRF RP20 OPEN To trip bistables:

OPDT trip: MRF RX013 TRIP OPDT RB: MRF RX014 TRIP OTDT Trip: MRF RX135 TRIP OTDT RB: MRF RX136 TRIP Low Tave: MRF RX016 TRIP Lo-Lo Tave: MRF RX015 TRIP To close protection cabinet 1: MRF RP20 CLOSE Acknowledge as SM the 1C CD/CB pump trip, 1BOA SEC-1 entry, request for E-Plan evaluation and requests for on line risk assessment, maintenance support and IR initiation.

If dispatched as EO, report that 1C CD/CB pump appears seized and the ground overcurrent flag has dropped at the breaker cubicle, Bus 159 cub 3 Acknowledge as Power Team load reduction and estimated duration of derate.

Byron ILT NRC 13-2 Page 4

Event 4: VCT Level Channel 1LT-112 Failed Low IMF CV16 0 As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

Event 5: Insert Malfunction FW22C to trip the C CD/CB pp Acknowledge as SM the 1C CD/CB pump trip, 1BOA SEC-1 entry, request for E-Plan evaluation and requests for on line risk assessment, maintenance support and IR initiation.

If dispatched as EO, report that 1C CD/CB pump appears seized and the ground overcurrent flag has dropped at the breaker cubicle, Bus 159 cub 3 Acknowledge as Power Team load reduction and estimated duration of derate.

Event 6: Feedwater flow channel 1FT-521 fails low Insert IMF RX04D 0 30 to fail 1FT-521 low over a 30 second period.

As SM acknowledge the failure, on line risk assessment, request for maintenance support, and IR requests.

Event 7: CNMT Pressure 1PT-936 Failed High IMF CH08C 60 120 As WEC or Extra NSO, acknowledge request to trip bistables.

As SM Acknowledge procedure entry and request for Emergency Plan evaluations.

As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications. Acknowledge entry to TS 3.3.2.

Event 8: ATWS - 1C RCP trip with Rx Trip Breakers Fail to Open IMF RP02A and RP02B (in preload)

IMF TH16C to trip 1C RCP As SM Acknowledge procedure entry and request for Emergency Plan evaluations.

After transition to 1BFR-S.1, Acknowledge request for STA and begin monitoring BSTs.

As EO, acknowledge request for local trip of Reactor Trip Breakers at 1RD05E. After crew has gone past step 7 of 1BFR S.1, DMF RP02A and RP02B, and MRF RP01 and RP02 OPEN Byron ILT NRC 13-2 Page 5

Event 9: Main Turbine Fails to trip on auto signal or manual push button IMF TC03 ZDIHSTG010 NORM Byron ILT NRC 13-2 Page 6

Scenario No: 002 Event No. 1 Event Switch Bus 156 Electrical Lineup

==

Description:==

Time Position Applicants Actions or Behavior CUE * (From Turnover) Realign Bus 156 to UAT following maintenance on ACB 1561 US

Refer to 1BGP 100-3 Step F. 43

Direct BOP to switch Bus 156 to the UAT per step F.43 BOP

Switch Bus 156 Electrical Lineup

Turn on synchroscope for Bus 156

Close 1561

Open 1562

Turn off syncroscope RO

Monitor primary and secondary panels

Control Tave with control rods or dilution as needed EVALUATOR NOTE: When electrical swap is complete, insert the next event.

Comments:

Byron ILT NRC 13-2 Page 7

Scenario No: 002 Event No. 2 Event Unit Supervisor notified of 1A SI pump ASME surveillance failure

==

Description:==

Time Position Applicants Actions or Behavior NOTE: At Lead Evaluators Discretion this event may be bypassed.

CUE

US called by Engineering that 1A SI pump ASME surveillance acceptance criteria has NOT been met.

US

Refers to TS 3.5.2 determines that Condition A applies:

Condition A: Restore pump to operable w/i 7 days

Calls SM and informs same of condition. Requests, evaluation for on-line risk, IR initiation and maintenance informed.

May request BOP/RO to place affected pump in PTL.

EVALUATOR NOTE: After the Tech. Spec. condition has been determined and with lead examiners concurrence, insert the next event.

Comments:

Byron ILT NRC 13-2 Page 8

Scenario No: 002 Event No. 3 Event 1A Tcold RTD Failed High

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator TAVE CONT DEV HIGH (1-14-D1) is LIT

Annunciator AUCT TAVE HIGH (1-14-E2) is LIT

Annunciator PZR LEVEL CONT DEV LOW (1-12-B4) is LIT

Rods stepping in CREW

Identify instrument failure US

Enter 1BOA Inst-2, Operation with a Failed Instrument Channel

Notify SM of procedure entry, request EAL evaluation and IR o Order ramp in HOLD if not stabilized from CD/CB pump trip RO

Verify/Place Rod Bank Select Switch in MANUAL

Manually defeat 1A Tave channel

Manually defeat 1A T channel o Check Rx power <100% RTP

Select operable RTD for the T recorder

Check if Rod Control can be placed in AUTO

Check C-5 NOT LIT (Bypass Permissive 5.7) o May place rods in AUTO if Tave within 1° of Tref o If not within 1°F, restore to within 1°F

Check Pzr level trending to normal

May take manual control of Master Pzr level controller or 1CV121

Check P-12 not LIT BOP/RO

Remove SPDS inputs: T0402A placed in TEST

Delete T0400 from SCAN BOP

Assist RO with BAR response o Place ramp in HOLD US

Contacts SM to determine if channel is to be tripped or bypassed o Contact the WEC to brief, or personally brief an extra NSO to trip bistables o Direct the crew to coordinate bistable tripping with extra NSO CREW o Verify no previously tripped bistables will cause a reactor or turbine trip o Mark bistables to be tripped with dots CREW o Coordinate with extra NSO to trip Loop A bistables US

Determines TS 3.3.1 condition A & E is applicable

Condition A: Immediately enter condition referenced in table

Condition E: Place channel in TRIP within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in MODE 3 in 78 Comments:

Byron ILT NRC 13-2 Page 9

Scenario No: 002 Event No. 3 Event 1A Tcold RTD Failed High

==

Description:==

Time Position Applicants Actions or Behavior o Channel may be BYPASSED for up to 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months for surveillance testing o TRM 3.h: not applicable because required channels are OPERABLE (PDMS)

EVALUATOR NOTE: After the actions for the instrument failure are complete and with Lead Examiners concurrence, insert the event 4.

Comments:

Byron ILT NRC 13-2 Page 10

Scenario No: 002 Event No. 4 Event VCT Level Channel 1LT-112 Failed Low

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator VCT LEVEL HIGH-HIGH LOW is LIT

VCT Level 1LI-112 indicates ZERO

Automatic RMCS makeup in operation CREW

Refer to BAR 1-9-A2

Determine 1LT-112 is failed LOW RO

Place RMCS makeup switch in OFF

Monitor VCT level o Makeup to VCT in MANUAL if required US

Notify SM of failure, request IR BOP

Monitor primary and secondary panels

Assist with BAR response EVALUATOR NOTE: Only manual make-up control will be available for the remainder of this scenario EVALUATOR NOTE: After the actions for the VCT level failure are complete and with Lead Examiners concurrence, insert the event 5.

Comments:

Byron ILT NRC 13-2 Page 11

Scenario No: 002 Event No. 5 Event 1C CD/CB Pump Trip with Runback required

==

Description:==

Time Positio Applicants Actions or Behavior n

CUE

Annunciator CD/CB PUMP TRIP (1-17-A9) is LIT US

Enter and direct actions of 1BOA Sec-1, Secondary Pump Trip

Notify SM of procedure entry and request EAL evaluation BOP

Check turbine load: > 700 MW

Check a Standby CD/CB pump cannot be started

Determines 3 CD/CB pps NOT running

Initiates a CD/FW runback by push button or panel G5512

Check Turbine Load DROPPING RO o Monitor RCS Tave and reactivity effects caused by secondary feedflow changes.

Places Rods in AUTO

Initiates boration as necessary

Set up boration IAW ReMa and BOP CV-6

Initiate boration using BOP CV-6 or BOP CV-6T1 checklist

Select STOP on RMCS Makeup Control Switch

Select BORATE on RMCS Mode Select Switch

Enter desired boration amount in BA totalizer (NOTE to Evaluator: 295 gals of BA needed to reduce power from 1200 MW to 700 MW. RO should deliver about 100 gals of BA to reduce load by approximately 150 MW from current conditions)

Turn ON RMCS Makeup Control Switch

Verify 1CV110B OPEN

Verify 1CV110A MODULATING

Verify 1AB03P STARTS

Verify proper AB flow on 1FR110

Coordinate boration with unit ramp by BOP

Maintain Tave-Tref within 3°F o Assist BOP with BAR response BOP

Check FW pumps not cavitating

Close 1CB113C o Check FW pump discharge flow: NOT oscillating o Reduce FW pp flow while maintaining >50% level in SGs

Continue to monitor FW pp performance

Check Alarms NOT LIT o CB PP DSCH Flow High (1-17-B11)

Comments:

Byron ILT NRC 13-2 Page 12

Scenario No: 002 Event No. 5 Event 1C CD/CB Pump Trip with Runback required

==

Description:==

Time Positio Applicants Actions or Behavior n

o FWpp NPSH LOW (1-16-E1)

RO/BOP

Check Plant Status o PDMS INOPERABLE alarm (1-10-D8) IS lit o 1BOL 3.h IS implemented o Control DI near target o Rod bank RIL alarm (1-10-B6) NOT lit o Turbine RB Light (OWS graphic 5501) is NOT lit o C-7 (BP 4.6) NOT lit US o IF RCS pressure lowers to less than 2209 PSIG, evaluate DNB TS 3.4.1 CREW

Restore Plant Conditions

Adjust RCS boron concentration as necessary

Verify controls for running equipment in - AUTO:

o TDFP o HD pump discharge o CB pump recircs o CD pumps recirc o GS condenser bypasses

Complete shutdown of tripped CD/CB pump per BOP CD/CB-2, CONDENSATE/CONDENSATE BOOSTER SYSTEM SHUTDOWN

Adjust SG blowdown flows and calorimetric inputs as necessary

Verify DEHC feedback loop in service

Notify Chemistry to monitor secondary chemistry o Complete applicable section(s) of 1BGP 100-4 (if runback performed)

Check Reactor power change > 15% in one hour. If so:

o Notify Chemistry and RP to perform the power change surveillances

Notify Shift Manager to perform step 8 of 1BOA SEC-1 Attachment B for CD/CB Trip EVALUATOR NOTE: After the unit has stabilized and with Lead Examiners concurrence, insert event 6.

Comments:

Byron ILT NRC 13-2 Page 13

Scenario No: 002 Event No. 6 Event Feedwater flow channel 1FT-521 fails low

==

Description:==

Time Positio Applicants Actions or Behavior n

CUE

Annunciator 1B SG FW FLOW MISMATCH (1-15-B4)

FW flow indicator 1FI-521A lowering

FW flow indicator 1FI-520A rising

FWRV 1FW-520 opening

SG level indicators 1LI-527, 528, 529, 557 rising BOP

Identify 1FT-521 failed low

Report failure to US

Perform the following at 1PM04J

Place 1FW-520 in MANUAL

Lower FW flow to match or slightly lower than steam flow

Monitor 1B SG level and control 1FW-520 in MANUAL RO

Assist BOP as requested

Monitor reactor panel for reactivity changes CREW o Refer to BARs

Identify entry conditions for 1BOA INST 2, OPERATION WITH A FAILED INSTRUMENT CHANNEL, Attachment G.

US

Notify SM of plant status and procedure entry.

Request evaluation of Emergency Plan conditions.

Enter/Implement "1BOA INST-2, OPERATION WITH A FAILED INSTRUMENT CHANNEL", Attachment G.

BOP

Select operable SG level channel F-520 on 1FS-520C

Check 1B SG level - normal on 1LI-527, 528, 529, 557

Place 1FW-520 in AUTOMATIC Crew

Check reactor power <100%

BOP

HD pp disc. flow control valve position - Normal Crew o Evaluate impact on calorimetric EVALUATOR NOTE: After the actions for the feedwater flow channel failure are complete and with Lead Examiners concurrence, insert the event 7.

Comments:

Byron ILT NRC 13-2 Page 14

Scenario No: 002 Event No. 7 Event CNMT Pressure 1PT-936 Failed High

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator CNMT PRESS HI-3 (1-3-D4) is LIT

Annunciator CNMT PRESS HI-2 (1-3-C4) is LIT

Annunciator CNMT PRESS HIGH (1-3-B4) is LIT

Indicator 1PI-CS936 indicates 60 PSIG US

Enter 1BOA Inst-2, Operation with a Failed Instrument Channel, Att K

Notify SM of procedure entry, request E-Plan evaluation and IR

Contacts SM to determine if channel is to be tripped or bypassed o Contact the WEC to brief, or personally brief an extra NSO to trip bistables o Direct the crew to coordinate bistable tripping with extra NSO US

Notify WEC to, or perform brief of extra NSO to trip bistables

Direct crew to coordinate tripping bistables with extra NSO CREW o Verify no previously tripped bistables will cause a reactor or turbine trip o Mark bistables to be tripped with dots US

Enter TS 3.3.2, conditions A, D & E

Condition A: Immediately enter condition referenced in table

Condition D: (Cont Press Hi-1) Place channel in TRIP within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in MODE 3 in 78 and MODE 4 in 84

Condition E: (Cont Press Hi-3) Place channel in BYPASS within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in MODE 3 in 78 and MODE 4 in 84

One additional channel may be BYPASSED for up to 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months for surveillance testing EVALUATOR NOTE: After the actions for the failed pressure channel are complete and with Lead Examiners concurrence, insert event 8.

Comments:

Byron ILT NRC 13-2 Page 15

Scenario No: 002 Event No. 8 Event

Description:

1C RCP Trip with ATWS Time Position Applicants Actions or Behavior CUE

The following annunciators are LIT:

RCP TRIP (1-13-E3)

RCP 1C BRKR OPEN OR FLOW LOW ALERT (1-13-C3)

CREW

Identify entry conditions for 1BEP-0, REACTOR TRIP OR SAFETY INJECTION EVALUATOR NOTE: The crew may dispatch an operator to open the reactor trip breakers before reaching step 6.

US

Enters 1BEP-0, REACTOR TRIP OR SAFETY INJECTION

Transition to 1BFR S.1, ATWS

Notify SM of procedure entry

Request EAL evaluation and STA to monitor BSTs RO o Rod Bottom lights -NOT LIT o Rx Trip and Bypass Bkrs- NOT ALL OPEN

Manually TRIP the Reactor from BOTH locations

Allow rods to insert automatically until rod speed less than 48 SPM, then manually insert rods CREW

Manually trip the Turbine

[CT] o All Turbine throttle valves - CLOSED.

FR-S.1--A o All Turbine governor valves - CLOSED.

Recognizes the Turbine did not auto trip from Reactor trip

Manually trip the turbine o Actuate manual trip P.B.

o Operate the manual trip soft key on the OWS G-5512 panel

Select turbine manual on G-5501 panel

Select RAPID

Select and hold GV lower arrow OR o Manually actuate Mainsteam Line Isolation CREW

Manually start both AF pumps

[CT]

FR-S.1--B I NEED a TIME RO/BOP

Verify/ensure Control Rods inserting in Manual or Auto at least 48 steps per

[CT] minute FR-S.1--C

Check at least 1 CV pump running

Initiate emergency boration by

Open 1CV8104

Start boric acid transfer pump Comments:

Byron ILT NRC 13-2 Page 16

Scenario No: 002 Event No. 8 Event

Description:

1C RCP Trip with ATWS Time Position Applicants Actions or Behavior

Check emergency boration and charging flows > 30 GPM RO/BOP

Check Pzr pressure < 2335 PSIG

Verify Group 6 CVI monitor lights LIT CREW

Check if Reactor Trip has occurred

Dispatch EO to locally open Rx Trip Breakers

Check Turbine Trip occurred EVALUATOR NOTE: Depending on timeframe, the crew may go to either step 8 or step 16 at this point. Steps 8-15 are in italics.

CREW

Check if Reactor is subcritical

PR channels <5%

IR channels - negative SUR CREW

Check SG NR levels > 1 SG >10%

Control feed flow to maintain SG NR level 10% - 50%

Check 1SD002A-H closed

Check 1CV111A & B closed

Verify BTRS MODE SELECTOR SWITCH is OFF

Dispatch operator to verify dilution paths are isolated o Check for RCS temperature NOT dropping uncontrollably o Check for any SG pressure NOT dropping uncontrollably

EVALUATOR NOTE: If RCS is cooling down or SG are depressurizing, the crew will perform steps 11-13 CREW o Step 11: Check/close MSIVs and bypass valves closed o Step 12: Check SG pressure NOT dropping uncontrollably or depressurized o Step 13: Isolate Faulted SG CREW

Step 14: Check CETC < 1200°F

Step 15: Verify reactor subcritical

PR channels < 5%

IR channels - negative SUR Crew

Return to procedure and step in effect US

Announces transition to 1BEP-0, Reactor Trip or Safety Injection EVALUATOR NOTE: The scenario can be terminated after the transition to 1BEP-0 is announced or at Lead Examiners discretion.

Comments:

Byron ILT NRC 13-2 Page 17

Facility: _Byron Nuclear Station Scenario No.: __3__ Op-Test No.: _2013301_

Examiners: _D. McNeil__________________ Operators: ____________________________

_R. Baker___________________ ____________________________

_D. McNeil__________________ ____________________________

Initial Conditions: __IC-16, 56% power, steady state, equilibrium xenon, BOL____________________

Turnover: Unit 1 is at 56% power, steady state, equilibrium xenon, BOL CB D is at XXX steps and boron concentration is 998 ppm. Preconditioned to 100% power at 6400 EFPH. Online risk is yellow. 1A CS pp is O.O.S. for a motor lube oil change and is scheduled to be released at the end of shift. It is expected that Power Team will call for the unit to be ramped to 880 MWe at .2MW/min._____________

Event Event Event Malf. No.

No. Type* Description IOR ZDI1CS01PA PTL 1A CS pp O.O.S.

IMF CS01A 1A CS pp fails to start Preload IRF CS05 OVER Preload Prevents 1B CS pp from Auto start IMF CH01B 1B RCFC fails to start in Lo Speed IMF CH01C 1C RCFC fails to start in Lo Speed N (BOP, SRO) 1 None (from 10-1-5 cert) Ramp unit up R (RO, SRO) 2 IMF RD13AK08 TS (SRO) DRPI failure (1 rod) in CB A for 1 train C (RO, 3 IMF CV07A 80 60 RCP Seal Injection Filter Clogged SRO)

I (RO, 4 IMF RX13A 100 SRO) TS Pzr LT-459A Fail High (controlling channel)

(SRO)

C (BOP, 5 IMF FW02A 1B TDFP Trip SRO)

Steam Generator 1D controlling Steam Pressure I (BOP, IMF RX01K 0-(from 10- channel fails low requiring Manual control of 1D SG 6 SRO) 1-1 cert) Main Feed Reg Valve. Enter Tech Spec 3.3.2 for TS (SRO) actions.

7 IMF MS07D 4 240 M (ALL) 1D Steam Line Break inside CNMT CS Pumps Auto Start Failure, Manual Start required; (Preloaded) 1B CS pump fail to auto start due to 1CS019B failure MF CS01A C (SRO, to auto open 8 RF CS05 OVER CREW)

IMF CH01B 1B RCFC fails to start in Lo Speed IMF CH01C 1C RCFC fails to start in Lo Speed

(N)ormal, (R)eactivity (I)nstrument, (C)omponent, (M)ajor Transient

SCENARIO OVERVIEW Unit 1 is at 56% power, steady state, equilibrium xenon, MOL CB D is at 149 steps and boron concentration is 999 ppm. Online risk is yellow. The crew is to ramp the unit to 880 MWe at 0.2 MW/min After completing shift turnover and relief, the crew will commence the ramp up by dilution to 880 MWe.

Before the ramp has commenced, a DRPI failure will occur on Rod K-8 requiring the U.S. to consult Tech Spec. 3.1.7 After the ramp has commenced, the annunciator for RCP Seal Injection High DP will alarm. BOP CV-10, CV Filter Operations will be utilized to swap Seal Injection Filters. The crew may enter 1BOA RCP-2, Loss of Seal Cooling, which directs the use of BOP CV-10 to swap filters. Since the standby filter is placed in service, 1BOSR 5.5.1-1 is required to be performed IAW Tech Spec 3.5.5. This evolution is NOT included with this material.

After normal seal injection flow is restored and the plant stabilized, Pressurizer level transmitter 1LT-459A, the controlling channel, fails high. The RO will take manual control of either the Master Pzr level controller or 1CV121 to raise charging. The crew will enter 1BOA Inst-2, and there is a high level bistable to be eventually tripped. The SRO will refer to Tech. Specs 3.3.1, 3.3.4 and 3.3.3. TS 3.3.1, conditions A and K are applicable.

After the actions for the Pzr control malfunction are completed, 1B TDFP spuriously trips, causing a reduction in feedwater flow. The crew will enter 1BOA Sec-1.

After taking actions for the Feedwater pump trip and the plant stabilizes, the 1D SG controlling steam pressure channel, 1PT 545A, will fail low requiring manual control of the 1D SG feedwater regulating valve.

The SRO will enter 1BOA INST-2, for the failed SG Steam pressure channel and direct actions to restore the 1D feedwater regulating valve to automatic control. Tech Spec 3.3.2, Conditions A and D apply.

After the ramp has been initiated, a 4 Mlb/hour fault develops and ramps in over 240 seconds in the 1B Steam Line inside Containment. The crew will trip or verify a trip of the reactor, initiate or verify Main Steam Line isolation, and initiate or verify Safety Injection. The crew will enter 1BEP-0, Reactor Trip or Safety Injection, transition to 1BEP-2, Faulted Steam Generator Isolation, then transition to 1BEP ES-1.1, SI Termination.

The Containment Spray pumps will not automatically start, requiring the crew to manually actuate Containment Spray. Only the 1B CS pump will start. In addition, 2 RCFC will not start in low speed which will require a CS pump to function.

Completion criterion is transition to 1BEP ES-1.1, SI Termination. The lead evaluator may end the scenario at the transition, or after SI has been terminated.

Critical Tasks

1. Manually actuate at least the minimum required complement of containment cooling equipment before an extreme (red-path) challenge develops to the containment CSF.

(ERG Critical Task number - E-0--E) (K/A: 026000A4.01 - IR: 4.5/4.3)

2. Isolate the faulted SG before transition out of E-2.

(ERG Critical Task number - E-2--A) (K/A: APE040AA1.10 - IR: 4.1/4.1)

Byron ILT NRC 10-1 Page 2

SIMULATOR SETUP GUIDE:

Verify/perform TQ-BY-201-0113, BYRON TRAINING DEPARTMENT SIMULATOR EXAMINATION SECURITY ACTIONS CHECKLIST.

Establish the conditions of IC 16, 56% power, MOL, steady state, equilibrium xenon.

Complete items on Simulator Ready for Training Checklist.

Verify/remove any Equipment Status Tags and Danger Tags not applicable to the scenario.

Place C/O tags on 1A CS pp MCB C/S

1A Seal Injection filter on line placard placed on 1PM05J

Place simulator in RUN (allow simulator to run during board walk down and turnover).

Verify RM-11 is on grid 1, Ensure horns are turned ON. Set BA and PW controllers to Rema numbers or 0 and reset.

Ensure 1D SG STEAM FLOW channel selected to F-543

Open Cae file: NRC 13-3.cae Byron ILT NRC 10-1 Page 3

INSTRUCTOR/SIMULATOR RUN AID GUIDE Event 1: Ramp Unit 1 to 880 MWe at 0.2 MWe/min.

Event 2: 1 Rod DRPI Failure IMF RD13AK08 As SM Acknowledge Tech Spec entry.

As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

Event 3: RCP Seal Injection Filter clogged IMF CV07A 80 60 AS EO, report 1A Seal Injection filter DP at 35 PSID (High alarm setting is 29 PSID).

When directed, swap to the 1B filter IAW BOP CV-10. Open 1CV8384B by MRF CV42 100 and close 1CV8384A by MRF CV41 0.

A few minutes after filters are swapped call as the A.B. E.O. and inform U.S. of step in procedure to perform 1BOSR 5.5.1-1 As SM Acknowledge procedure entry and request for Emergency Plan evaluations.

As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

Event 4: Respond to Pressurizer Level Channel Failure IMF RX13A 100 As SM Acknowledge procedure entry and request for Emergency Plan evaluations.

As SM Acknowledge entry into Tech Spec LCOAR As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

As SM inform US that bistables will be tripped when personnel are available As WEC or Extra NSO, acknowledge request to trip bistables.

To trip bistables, MRF RP20 OPEN to open Protection Cabinet 1, MRF RX029 TRIP for LB459A Byron ILT NRC 10-1 Page 4

Event 5: 1B TDFP Trip IMF FW02A As EO, if asked to investigate the cause of the pump trip, report no visible cause, but there is scaffold material piled on the floor by the local control panel, and that you (the EO) will talk to the carpenters.

As SM Acknowledge procedure entry and request for Emergency Plan evaluations.

As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

Event 6: Steam Generator 1D controlling Steam Pressure channel fails low (1PT545A).

Initiate event after event 5 actions completed Acknowledge all info passed to the SM, WEC, and maintenance.

SDG: RX16 IMF RX01K 100 If requested to trip bistables, and Lead Examiner wants to see this action:

MRF RP21 OPEN/CLOSE MRF RX 095 Trip MRF RX 096 Trip Otherwise, there are NO NSOs available to trip bistables for 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months As SM Acknowledge procedure entry and request for Emergency Plan evaluation As SM Acknowledge request for writing IR, performing risk assessment and making appropriate notifications.

Event 7: 1D Steam Line Break inside Containment IMF MS07D 4 240 to cause a 4 MLB/hr steam line break on the 1D Steam Line inside CNMT.

As SM Acknowledge procedure entry and request for Emergency Plan evaluations.

After transition to 1BEP-2, Acknowledge request for STA and begin monitoring BSTs.

Event 8: CS Pump Failure to automatically start Byron ILT NRC 10-1 Page 5

Scenario No: 003 Event No. 1 Event Raise power at 0.66 MW/min

==

Description:==

Time Positio Applicants Actions or Behavior n

CUE o Direction from Power Team to raise power to 880 MW at 0.4 Mw/min.

US

Acknowledge request to raise power to 880 MW at 0.2 Mw/min.

Implement actions of 1BGP 100-3.

o Perform pre-job brief per HU-AA-1211 PRE-JOB, HEIGHTENED LEVEL OF AWARENESS, INFREQUENT PLANT ACTIVITY, AND POST JOB BRIEFINGS for load ramp.

US

Direct raising load to 880MW at 0.66 MW/min.

Initiate load swing instruction sheet, 1BGP 100-3T5.

CREW

Review applicable Precautions, and Limitations and Actions.

NOTE: The ramp strategy will be about 130 gallons of PW about every 15 minutes and supplement with rods to control temperature. This will result in about a 3% per hour change in Rx power.

RO

Verify rod position and boron concentration.

o Perform dilution boundary calculation per 1BGP 100-3T5.

Determine required PW volume: (approximate band: 1200 gal - 1400 gal).

Rema

Determine required PW flow rate.

Initiate dilution as required (BOP CV-5).

Perform the following at 1PM05J:

Set 1FK-111 PW/Total Flow Cont POT to the desired PW flow rate.

Set 1FY-0111 PW Control Predet Counter to desired PW volume.

Place MAKE-UP CONT SWITCH to STOP position.

Set MODE SELECT to DIL/ALT DIL position.

Place MAKE-UP CONT Switch to START.

Verify proper operation of valves and PW makeup pump (1CV111B open, 1CV111A throttled, 1CV110B open (ALT DIL only), PW pump running, PW flow on recorder).

Turn on PZR backup heaters.

BOP

Raise turbine load at 1PM02J or OWS drop 210 by performing the following:

Select SETPOINT.

Enter 0.66 MW/min into the RATE window.

Select ENTER.

Enter 880 MW into REF DEMAND window.

Select ENTER.

Select EXIT.

Comments:

Byron ILT NRC 10-1 Page 6

Scenario No: 003 Event No. 1 Event Raise power at 0.66 MW/min

==

Description:==

Time Positio Applicants Actions or Behavior n

o Notify US and RO of pending ramp.

Select GO/HOLD.

Verify GO/HOLD button illuminates.

Verify HOLD illuminated RED.

Select GO.

Verify GO illuminates RED.

Verify main turbine load begins to rise.

RO/

Monitor reactor power and load ascension:

BOP

Monitor NIs, Tave, I, Pzr press/level at 1PM05J.

Monitor MW and DEHC system response at 1PM02J or OWS drop 210.

During dilution, monitor the following at 1PM05J and HMI:

VCT level.

RCS Tave rising/RCS boron concentration lowering.

PW/Total flow predet counter responding correctly.

Verify dilution auto stops at preset value.

Return Reactor Makeup System to automatic.

After measurable change in power and Lead Examiner approval, initiate the event 2.

Comments:

Byron ILT NRC 10-1 Page 7

Scenario No: 003 Event No. 2 Event DRPI Failure 1 rod in 1 train on CB A

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator 1-10-D6 Rod Cont Non-Urgent Failure

SER 2150 in alarm

Data B failure on Rod K-8 Crew

Acknowledge annunciator.

Open BAR

Check SER alarm RO o Place Bank Select Switch in Manual US

Notify SM and requests IR generation

Requests an extra NSO perform BOP RD-8, DRPI System Troubleshooting

Review Tech Specs

3.1.7 Condition A applies: Verify the position of the rods with inoperable DRPIs once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months or reduce power to < 50%

TRM 3.1.g- Determines the TRM is not applicable Comments:

Byron ILT NRC 10-1 Page 8

Scenario 003 Event 3 No: No.

Event RCP Seal Injection Filter Clogged

==

Description:==

Time Positio Applicants Actions or Behavior n

CUE

Annunciator RCP Seal Inj Filter High DP (1-7-A2) LIT

Annunciator RCP Seal Water Inj. Flow Low (1-7-B2) LIT

Seal injection flows lowering RO

Adjust 1CV182 to maintain at least 8 GPM seal injection flow per RCP o Adjust 1CV121, if necessary o Dispatch EO to check 1A Seal Injection filter DP CREW

Dispatch EO to swap seal injection filters using BOP CV-10, CV Filter Operations Evaluator Note: The crew may enter 1BOA RCP-2 for the loss of seal cooling. This will direct swapping filters using BOP CV-10. Actions of 1BOA RCP-2 follow in italics.

US

Implement 1BOA RCP-2, Loss of Seal Cooling

Notify SM of procedure entry, requests IR and EAL evaluation o Verify RCP seal cooling is met with RCP temperatures within limits RO

Restore Seal Injection

Dispatch EO to swap seal injection filters using BOP CV-10, CV Filter Operations

Control seal injection flow with 1CV182 and 1CV121 to 8 - 13 GPM per RCP BOP

Assist in monitoring primary plant while RO controls seal injection flow.

Provide assistance in diagnosis and BAR response.

US

Direct initiation of or initiate 1BOSR 5.5.1-1, RCS Seal Water Injection Flow Monthly Surveillance after standby filter is placed on line.

EVALUATOR NOTE: After the actions for the seal filter malfunction are complete and with Lead Examiners concurrence, insert event 4.

Comments:

Byron ILT NRC 10-1 Page 9

Scenario No: 003 Event No. 4 Event Pressurizer level channel 1LT-459 failed high

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator PZR LEVEL HIGH RX TRIP STPT ALERT (1-12-A3) is LIT

Annunciator PZR LEVEL HIGH CONT DEV HTRS ON (1-12-C3) is LIT

1LI-459A indicates 100% level

Charging flow lowering o Refer to BARs.

CREW

Identify entry conditions for 1BOA INST-2, OPERATION WITH A FAILED INSTRUMENT CHANNEL.

US

Notify SM of plant status and procedure entry.

Request evaluation of Emergency Plan conditions.

Implement 1BOA INST-2 "OPERATION WITH A FAILED INSTRUMENT CHANNEL",

Attachment C "PRESSURIZER LEVEL CHANNEL FAILURE" and direct operator actions of 1BOA INST-2 RO

Perform the following at 1PM05J:

Place 1FK-121, CV pumps flow control valve, and/or 1LK-459, PZR master level controller, in manual.

Raise demand on 1FK-121 and/or 1LK-459 in conjunction with controlling demand on 1CV182 to raise charging flow.

Operate 1FK-121 and/or 1LK-459 in manual to minimize PZR level drop and maintain 8-13 gpm RCP seal injection flow.

Select an operable Pzr level channel for control- 461/460

Select an operable Pzr level channel to the recorder

Place 1FK-121, CV pumps flow control valve, and/or 1LK-459, PZR master level controller, as appropriate, in automatic.

US

Contact SM or WEC for tripping bistables o Verifies tripping bistables will NOT result in a Rx TRIP o Perform pre-job brief per HU-AA-1211 for bistable tripping.

o Complete 1BOL 3.1, Attachment B, INSTRUMENT CONDITION TRACKING LOG.

Extra o Locally trip bistable for 1LT-459 / RO verifies correct bistable operation NSO/

RO US

Determine TS 3.3.1 conditions A and K are applicable.

Condition A- Immediately enter the table

Condition K- Place channel in TRIP in 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or reduce power to < P-7 in 78 hours9.027778e-4 days 0.0217 hours 1.289683e-4 weeks 2.9679e-5 months

Determine TS 3.3.3 and 3.3.4 are NOT applicable - minimum channels operable requirement is met.

o May decide to make a Degraded Equipment Log Entry Comments:

Byron ILT NRC 10-1 Page 10

Scenario No: 003 Event No. 4 Event Pressurizer level channel 1LT-459 failed high

==

Description:==

Time Position Applicants Actions or Behavior

Contact SM to perform risk assessment, initiate IR, and contact maintenance to investigate/correct instrument failure.

BOP

Monitor secondary systems

Assist RO with annunciator response EVALUATOR NOTE: After the instrument failure has been addressed and with lead examiners concurrence, insert event 5.

Comments:

Byron ILT NRC 10-1 Page 11

Scenario No: 003 Event No. 5 Event 1B TDFP trip

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator FW Pump 1B Trip (1-16-B2) is LIT

Annunciators SG 1A-D Flow Mismatch FW Flow Low (1-16-A:D4) are LIT

Annunciator FW Pump Discharge Flow High (1-16-D2) is LIT o Auto start of standby CD/CB pump with associated alarms LIT

SG levels lowering US

Enter 1BOA Sec-1, Secondary Pump Trip, Attachment A for FW Pump trip o Direct BOP to close 1FW012B o Direct RO/BOP to monitor SG levels for Reactor Trip criteria

Notify SM of plant status, procedure entry, request IR and maintenance notification and EAL evaluation BOP

Close 1FW012B

Check Turbine load > 700 MW

Check at least 1 FW pump running

Restore feed flow

Check FW PUMP NPSH LOW alarm LIT

Verify CP bypass valves are open: 1CD210A and B.

US

Orders the power ascension stopped, if not already CREW

Restore Plant Conditions

Adjust RCS boron concentration as necessary

Balance FW pump flows as necessary

Verify FW pump recirc valves on running FW pumps in - MODULATE

Verify valve controls for running equipment in - AUTO:

o HD pump discharge o CB pump recircs o CD pumps recirc o GS condenser bypasses o Shutdown unnecessary CD/CB pump per BOP CD/CB-2, CONDENSATE/CONDENSATE BOOSTER SYSTEM SHUTDOWN o Complete shutdown of tripped FW pump per BOP FW-2, SHUTDOWN OF A TURBINE DRIVEN MAIN FEEDWATER PUMP o Adjust SG blowdown flows and calorimetric inputs as necessary CREW

Verify DEHC feedback loop in service

Notify Chemistry to monitor secondary chemistry Comments:

Byron ILT NRC 10-1 Page 12

Scenario No: 003 Event No. 5 Event 1B TDFP trip

==

Description:==

Time Position Applicants Actions or Behavior o Complete applicable section(s) of 1BGP 100-4 (if runback performed)

Check Reactor power change > 15% in one hour. If so:

o Notify Chemistry and RP to perform the power change surveillances US

Notify SM to perform:

Risk evaluation

Initiate IR

Evaluate for reactivity screening

Notify QNE

Notify as appropriate: WWM, SDM, SDO, NDO EVALUATOR NOTE: After the actions for the feed pump trip are complete and with Lead Examiners concurrence, insert event 6.

Comments:

Byron ILT NRC 10-1 Page 13

Scenario No.: 003 Event No.: 6 Event Steam Generator 1D controlling steam pressure channel fails low (1PT545A)

Description:

Time Positio Applicants Actions or Behavior n

CUE: Annunciators:

1-15-D1 S/G 1D LOW PRESS STEAMLINE ISOL ALERT 1-15-E1 MS PRESS RATE STM LINE ISOL ALERT 1-15-D3 S/G 1D FLOW MISMATCH STM FLOW LOW 1-15-D4 SG 1D FLOW MSMATCH FW FLOW LOW 1-15-D9 S/G 1D LEVEL DEVIATION HIGH LOW 1D SG steam pressure indication zero on 1PT545A 1D SG steam flow low 1D SG feedwater flow dropping 1B &1C FW Pump Speed dropping 1D SG Level dropping BOP/US

Identify/report failure of 1PT-545A, 1D steam generator steam pressure channel.

o Address 1-15-D9 alarm response

Check 1D SG level, steam flow, feed flow, and determine cause.

Take Manual control feed flow to 1D SG.

US Enter and direct actions of 1BOA INST-2, OPERATION WITH A FAILED INSTRUMENT CHANNEL Attachment F

Notifies SM of BOA entry

Requests Emergency Plan evaluation BOP Check affected SG level:

o Determine SG level not normal

Take manual control of 1FW540 M/A station and restore SG level to normal

Take manual control of 1SK-509A M/A station to maintain MFPs speed to maintain MFRV D/P

Select an operable steam flow channel (F-542)

Restore Automatic level control o Restore Automatic MFP speed control o Check reactor power less than 100%

ALL

Identify/flag TSLB lites associated with failed channel Identify/flag failed channel

Request operator to locally trip bistables for the affected channel Comments:

Byron ILT NRC 10-1 Page 14

Scenario No.: 003 Event No.: 6 Event Steam Generator 1D controlling steam pressure channel fails low (1PT545A)

Description:

Time Positio Applicants Actions or Behavior n

US Performs administrative requirements

Determines Tech Spec for 3.3.2 ESFAS Instrumentation Condition A and D apply

Condition A: Immediately enter Table

Condition D: Place channel in TRIP in 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or being in Mode 3 in 78 hours9.027778e-4 days 0.0217 hours 1.289683e-4 weeks 2.9679e-5 months and in Mode 4 in 84 hours9.722222e-4 days 0.0233 hours 1.388889e-4 weeks 3.1962e-5 months

Requests IR/WR/LCOAR Considers recommencing ramp RO Monitor plant response to FW transient and take actions directed by the US NOTE: When the above actions have been initiated for the failed SG steam pressure channel and with Lead Evaluators concurrence, Event 7 is entered.

(Bistables may be tripped at lead examiners discretion)

Comments:

Byron ILT NRC 10-1 Page 15

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior CUE

Annunciator CNMT Drain Leak Det Flow High Alarm (1-1-A2) is LIT

Annunciator CNMT Press High Alarm (0-33-D6) is LIT EVALUATORS NOTE: The crew may decide to actuate Safety Injection before actuation pressures are reached. SI will automatically actuate about 90 seconds after the malfunction is inserted.

CREW

Identify entry conditions for 1BEP-0, REACTOR TRIP OR SAFETY INJECTION US

Order U-1 Reactor trip

Notify SM of plant status and procedure entry

Request evaluation of Emergency Plan conditions

Enter/Implement 1BEP-0 and direct operators to perform the immediate actions of 1BEP-0 RO Perform immediate operator actions of 1BEP-0:

Step 1: Verify reactor trip

Rod bottom lights - ALL LIT

Reactor trip & Bypass breakers - OPEN

Neutron flux - DROPPING BOP Perform immediate operator actions of 1BEP-0:

Step 2: Verify Turbine Trip

All Turbine throttle valves - CLOSED

All Turbine governor valves - CLOSED

Step 3: Verify power to 4KV busses

ESF Buses - BOTH ENERGIZED (141 & 142)

EVALUATORS NOTE: The crew may decide to actuate Main Steam Line Isolation after completion of Immediate Actions CREW o Manually actuate MSLI and verify MSIV and bypass valves are CLOSED CREW

Step 4: Check SI Status o SI First OUT annunciator - LIT o SI ACTUATED Permissive Light - LIT o SI Equipment - AUTOMATICALLY ACTUATED Comments:

Byron ILT NRC 10-1 Page 16

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior o Either SI pumps - RUNNING o Either CV pump to cold leg isolation valve OPEN - 1SI8801A/B

Recognize SI Actuated

Manually actuate SI from 1PM05J and 1PM06J EVALUATORS NOTE: Action to trip the RCPs should be initiated within 10 minutes of the RCP Phase B Isolation RO

Determine RCP trip required

Phase B Isolation actuated o RCS pressure < 1425 psig & High head SI flow (1FI-917) > 100 gpm

Trip ALL RCPs US

Step 5: Direct BOP to perform Attachment B of 1BEP-0 EVALUATOR NOTE: US and RO will continue in 1BEP-0 while BOP is performing Attachment B: RO and SRO actions start again on page 17, step 6.

BOP

Perform 1BEP-0 Attachment B

Verify FW isolated at 1PM04J:

FW pumps - TRIPPED.

Isolation monitor lights - LIT.

FW pumps discharge valves - CLOSED (or going closed) 1FW002A-C.

Verify DGs running at 1PM01J:

DGs - BOTH DGs running

1SX169A & B OPEN.

Dispatch operator locally to check operation

Verify Generator Trip at 1PM01J:

OCB 3-4 and 4-5 open.

PMG output breaker open.

BOP

Verify Control Room ventilation aligned for emergency operations at 0PM02J:

VC Rad Monitors - LESS THAN HIGH ALARM SETPOINT.

Operating VC train equipment - RUNNING.

Supply fan

Return fan

M/U fan

Chilled water pump

Chiller

Operating VC train dampers - ALIGNED.

Comments:

Byron ILT NRC 10-1 Page 17

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior

M/U fan outlet damper - NOT FULLY CLOSED.

VC train M/U filter light - LIT.

Operating VC train Charcoal Absorber aligned

Bypass damper - CLOSED

Inlet damper - OPEN

Outlet damper - OPEN

Control Room pressure greater than +0.125 inches water on 0PDI-VC038.

Verify Auxiliary Building ventilation aligned at 0PM02J:

Two inaccessible filter plenums aligned.

Plenum A or B or C:

Fan - RUNNING

Flow Control damper - OPEN

Bypass Isolation damper - CLOSED

Plenum A or B or C:

Fan - RUNNING

Flow Control damper - OPEN

Bypass Isolation damper - CLOSED

Verify FHB ventilation aligned at 0PM02J:

Fan - RUNNING

Inlet Isolation damper - OPEN

Flow Control damper - OPEN

Bypass Isolation damper - CLOSED EVALUATOR NOTE: The remaining steps of Attachment B may be designated to be performed by WEC personnel or the Field Supervisor and extra operators.

o Trip all running HD Pumps o Shutdown FW pump as necessary using BOP FW-2 for a TDFP or BOP FW-8 for the MDFP o Shutdown unnecessary CD/CB Pumps using BOP CD/CB-2 o Align SX MDCT per BOP SX-T2 o Maintain SX Basin level > 80%

o Align NDCT o Verify CW intake bay level within band o Dispatch operator to locally verify NDCT basin level acceptable Comments:

Byron ILT NRC 10-1 Page 18

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior o Align NDCT per BOP CW-25 o Shutdown all unnecessary CW pumps per BOP CW-2

Initiate periodic checking of Spent Fuel Cooling o Notify US of actions taken, equipment status, and that Attachment B is complete RO/

Step 6: Verify ECCS pumps running BOP

Both CV pumps - RUNNING

Both RH pumps - RUNNING

Both SI pumps - RUNNING BOP/

Perform the following at 1PM06J:

RO

Step 7: Verify RCFCs running in Accident Mode:

Group 2 RCFC Accident Mode lights - B and C RCFCs are not running in accident Mode

Stop any RCFC running in High speed

Close CNMT chiller inlet and outlet valves 1SX112B/114B

Open CNMT chiller bypass valve 1SX147B o Open 1SX016B and 027B o Start all RCFCs in low speed: NOTE to Evaluator: RCFC B and C will NOT start

Step 8: Verify Phase A isolation:

Group 3 Cnmt Isol monitor lights - ALL LIT.

Step 9: Verify Cnmt Vent isolation:

Group 6 Cnmt Vent Isol monitor lights - ALL LIT.

BOP/

Step 10: Verify AF system:

RO

AF pumps - BOTH AF pumps RUNNING.

AF isolation valves - 1AF13A-H OPEN.

AF flow control valves - 1AF005A-H THROTTLED.

Step 11: Verify CC pumps - BOTH RUNNING.

Step 12: Verify SX pumps - BOTH RUNNING.

Step 13: Check if Main Steamline Isolation -required:

o 1D SG pressure < 640 psig (at 1PM04J) o CNMT pressure > 8.2 psig.

o Verify MSIV and Bypass Valves - CLOSED EVALUATORS NOTE: CS may have an actuation signal at this time. If it has not, the crew must return to this step to verify proper alignment when CNMT pressure exceeds 20 psig. CS will NOT automatically actuate and must be Comments:

Byron ILT NRC 10-1 Page 19

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior manually actuated.

BOP/

Step 14: Check if CS is required.

RO

CNMT pressure has risen > 20 psig.

[CT]

Group 6 CS monitor lights - NOT ALL LIT.

E-0--E

Manually actuate CS and Phase B Isolation

Go to Attachment C o Check CS001A OPEN

OPEN 1CS007A

1CS019A is NOT OPEN

Place 1A CS pump test switch in TEST

OPEN 1CS019A

Place 1A CS pump test switch in NORMAL

OPEN 1CS010A

Check 1A CS pump Running

Group 6 phase B lights - LIT

Verify/Stop ALL RCPs (at 1PM05J).

CS eductor suction flows - > 15 gpm

CS eductor additive flows - > 5 gpm

Align SX Towers

All 8 Riser valves OPEN

All 4 Bypass valves CLOSED

All 8 fans running in HIGH speed CREW

Recognize and announce ADVERSE CNMT BOP/

Step 15: Verify Total AF flow:

RO

AF flow > 500 gpm

S/G NR levels - NOT rising in an uncontrolled manner RO/

Step 16: Verify ECCS valve alignment BOP

Determine Group 2 Cold Leg Injection monitor lights required for injection - All lit RO/

Step 17: Verify ECCS flow BOP

High Head SI flow >100 gpm (1FI-917)

When RCS pressure < 1700 psig Comments:

Byron ILT NRC 10-1 Page 20

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior

BOTH SI pump discharge flows > 200 gpm

RCS pressure > 325 psig RO

Step 18: Check PZR PORVs and SPRAY VALVES at 1PM05J:

1RY455 & 1RY456 CLOSED

PORV isol valves - 1RY8000A & 1RY8000B BOTH ENERGIZED

PORV relief path - Both PORVs in AUTO, Both isolation valves - OPEN.

Normal PZR Spray Valves CLOSED RO

Step 19: Maintain RCS temperature control at 1PM05J:

Check RCPs - NONE RUNNING.

Verify RCS cold leg temperature stable at or trending to 557oF.

Throttle AF maintaining >500 GPM until SG minimum level is met o AF flow to 1D SG may be throttled to 0 GPM

MSIVs closed RO

Step 20: Check status of RCPs at 1PM05J:

o All RCPs - NONE RUNNING.

o Any RCPs still running - TRIP All RCPs IF Phase B isolation occurred or RCS pressure trip criteria is met BOP/

Step 21: Check if SG secondary pressure boundaries are intact at 1PM04J:

RO

Check pressure in all SGs:

1D SG dropping in an uncontrolled manner.

CREW

Transition to 1BEP-2, FAULTED STEAM GENERATOR ISOLATION US

Notify SM of plant status and procedure entry.

Request evaluation of Emergency Plan conditions.

Request STA evaluation of status trees.

Enter/Implement 1BEP-2 and direct operator actions of 1BEP-2 to establish the following conditions.

RO/

Check MS isolation at 1PM06J:

BOP

All MSIVs and bypass valves - CLOSED BOP

Check if any SG secondary pressure boundary is intact at 1PM04J:

1A, 1B, & 1C SG pressures stable.

Comments:

Byron ILT NRC 10-1 Page 21

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior CREW

Identify faulted SG at 1PM04J:

1D SG pressure decreasing in an uncontrolled manner.

RO/ BOP

Isolate 1D Steam Generator at completion of step 4 of 1BEP-2:

[CT]

Verify/close 1AF013D & H at 1PM06J E-2--A

Bottom row of FW isolation monitor lights - lit.

1MS018D closed.

1SD002C & D closed.

1SD005B closed.

CREW

Monitor AF pump suction pressure.

Annunciator AF PUMP SX SUCTION VLVS ARMED (1-3-E7) - NOT LIT.

CREW

Determine 1D S/G tubes are intact:

Reset Phase A isolation

Open 1SD005A-D

Request Chemistry Dept samples all SG for activity

Check there are NO RM-11 or HMI Rad Monitor ALERT/HI RAD Alarms.

o 1PR27J SJAE/GS 1PR08J SG Blowdown.

o 1PR08J SG Blowdown.

o 1AR 22/23D 1D Main steam Line o Secondary activity samples normal (when available)

CREW

Check if ECCS flow should be reduced

RCS subcooling -ACCEPTABLE

Secondary heat sink-total feed flow to INTACT SGs > 500 GPM or NR level in at least 1 SG > 10% (31% Adverse CNMT)

RCS pressure - stable or rising

Pzr level - > 12% (28% Adverse CNMT)

Determine transition to 1BEP ES-1.1, SI TERMINATION CREW

Transition to 1BEP ES-1.1, SI TERMINATION At lead Evaluators discretion the scenario may be terminated here. SI Termination steps are contained in the next two pages up to securing the CS pump.

Comments:

Byron ILT NRC 10-1 Page 22

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior US

Notify SM of plant status and procedure entry.

Request evaluation of Emergency Plan conditions.

Enter/Implement 1BEP ES-1.1 and direct operator actions of 1BEP ES-1.1 RO/

Reset SI BOP

Depress both SI reset PB

Verify SI Actuated light - NOT LIT

Very Auto SI Blocked light - LIT RO/

Reset Cnmt Isolation BOP

Reset Phase A

Reset Phase B BOP

Establish IA to CNMT

Check SACs - ANY Running

Open 1IA065 and 1IA066 RO/

Realign CV Pump BOP

Stop all but one CV pump CREW

Check RCS pressure - Stable or rising RO/

Terminate High-head SI BOP

CV pump suction aligned to RWST

Reset SI recirc sump isolation valves - 1SI8811A & B and 1CV8110 & 1CV8111

Reset CV pump miniflow valves - 1CV8114 and 1CV8116

Verify CV pump miniflow valves - OPEN

Close CV injection valves - 1SI8801A & B RO/

Establish Charging Flow BOP

Place 1CV182 at 0% demand

Open CNMT isolation valves 1CV8105 and 1CV8106

Set seal injection flow to 8-13 GPM per RCP RO/

Control Charging flow to maintain Pzr level stable BOP RO/

Check if SI pumps should be stopped BOP

RCS pressure - Stable or rising and > 1700 PSIG

Stop BOTH SI pumps and place in standby Comments:

Byron ILT NRC 10-1 Page 23

Scenario No: 003 Event No. 7&8 Event 1D Steam Line Break inside Containment

==

Description:==

Time Position Applicants Actions or Behavior

Step 10: Check if RH pumps should be stopped

Any running with suction aligned to RWST

Stop both RH pumps and place in standby

Verify ECCS flow not required

Subcooling acceptable

PZR level > 12% (28% adverse)

Check if CS should be stopped

Reset CS signal

Close 1CS019B

CNMT pressure less than 15 psig

Stop 1B CS pump and place in standby

Verify 1CS019B closed

Close 1CS007B EVALUATOR NOTE: The scenario can be terminated.

Comments:

Byron ILT NRC 10-1 Page 24

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