E-3 SGTR

SG tube rupture

FOP- CMT criteria?

RCS subcooling <10f

OR

PZR Nr lvl <10%

Then acutate CMT and Go To step 10

What step isolates CMTs

Step 46

FOP SG integrity criteria?

Any unisolated SG rapid depressurization or depressed

Go To Att 1 (Faulted SG)

FOP Multiple SG tube rupture criteria?

Rapid SG lvl rise or abnormal rise in RAD

Return to Step 1

FOP LOCA outside CTMT criteria?

Abnormal RAD or flooding due to leak from CTMT

Then Go To ECA-1.1 LOCA outside CTMT

When is FOP applicable?

prior to step 1

how to isolate Ruptured SG?

AER: Close MSIVs

RNO: MSL iso, close MSIV, If Rupture can’t be iso’d from MSL then Att.2 (stuck open MSIV), if rupture not iso’d from intact SG then do not release steam

What level is ruptured SG maintained?

34%NR (54%NR adverse)

Minimum inventory to cover tubes to prevent scrubbing while preventing overfill

What pressure is ruptured SG PORV set?

1160psig in AUTO

How is Secondary RAD minimized?

Isolate Hotwell reject

Steam to Aux boiler

isolate CPS

If all offsite power lost?

Ensure a running seal oil pump

AOP-302 AC loss

Go To step 27 until ES-1/2 have power then return to step 11

Maintain intact SG at what lvl?

29-52.5% NR (49-52.5%NR adverse)

if intact SG <21% then ensure feed >400gpm

What M/U flow is established?

if 2 pumps available then 175gpm

if 1 then 135gpm

Pumps in Manual RMCS in Auto

Use ES-0.5 RCS pressure control to maintain what RCS pressure?

<1920psig to block Safeguards

Does MSS-V025 close on a MSL iso signal?

No

If NO heat sink available then?

Go To FR-H.1 heat sink loss

If PRHR is NOT in service then what is required?

establish steam dump before continuing

before continuing ensure:

Subcool >20f (60f adverse)

OR

Thot <400f

What cooldown rate is established?

50f/hr

If RCS <500psig then?

Ensure Tcold >=350f

If cooldown rate >100f/hr then?

Ensure Tcold >=98f

Criteria to Start RCS depress?

Subcool >20f (60f adverse)

PZR < M/U stop SP

RCS >417psig (94psig adverse)

RCS press > Ruptured SG pressure

Criteria to isolate the accumulators?

RCS <116psig

OR

RCS <348f

OR

subcool >10f (50f adverse) AND PZR RN >10%

criteria to terminate RCS depress?

Subcool <10f (50f adverse)

OR

PZR NR >L/D start

OR

RCS <417psig (94psig adverse)

OR

RCS <= ruptured SG pressure

If PZR NR > M/U Stop SP?

Use Rx Head vents to lower lvl <= to M/U stop SP

criteria to isolate CMTs?

Subcooling >10 (50f adverse)

PZR NR >10%

DAS PZR >10.5%

CVS M/U available

What to use when determine PZR at saturation?

PZR liquid temp only

Criteria to restore CVS L/D?

CMT - OFF

CCS flow to CTMT

PZR NR <25%

CTMT temp <168.5f

If L/D NOT available then how to maintain lvl?

Use Rx head vents to maintain < L/D stop SP

What effect will NO RCPs and NO natural circulation have on RCS boron?

Dilute eater from the SG rupture could feed into the RCS and with no flow pockets of dilute water could exist in the RCS

Indications of natural circulation?

Subcool >10f (50f adverse)

CETs stable or lowering

Thot stable or lowering

Intact SG pressure stable or lowering

intact SG at RCS Tcold saturation

Criteria to keep CMT isolated?

Subcool >10f (50f adverse)

PZR NR >10%

DAS PZR >7.5%

If any NOT met then ensure CMT and PRHR actuation

Criteria to isolate PCS?

CTMT <4.8psig

CTMT <168.5f

What is the preferred method to reduce ruptured SG pressure?

SG backfill and ambient loss

criteria to place RNs in service if not already?

Thot <400f

RCS WR press RNS iso OFF all 4 divisions

Criteria to isolated PRHR?

Any running FWS pump and SG NR >21% and at Tcold sat pressure

OR

RNS in SDC mode

If PRHR is being isolated and PXS-V108A/Bs can not be closed?

Close PXS-V101

criteria to establish VWS to CTMT?

PXS-V108A/B closed (PRHR flow stopped)

VWS In service

VCS running

CTMT <203f

Basis for VWS and PRHR not in service at same time?

If PRHR in service and VWS to VCS then condensation on VCS coolers will rob IRWST inventory

FOP ADS 1-3 actuation criteria?

If ES-1.3 not previously performed and:

CMT Upper NR <57.5%

OR

No CMT operating AND sustained RCS HL <20% (58% adverse)

OR

Ruptured SG NR >96%

OR

Ruptured SG AND secondary integrity no established per Att 1 SG fault

Go To ES-1.3 ADS1-3 response and Go To E-1 loss of Pri/Sec coolant

FOP ADS 4 actuation criteria?

If ES-1.4 ADS 4 response not performed and:

CMT lower NR <56%

OR

No CMT and sustained RCS HL <20% (58% adverse)

Go To ES-1.4 ADS 4 response and Go To E-1 Loss of Pri/Sec Coolant