Standard Post Trip Actions (SPTAs)

Question 1

The CRS should communicate with the ___ as necessary to concur with the diagnosis. The ___ should communicate with the ___ to discuss the diagnosis.

Answer 1

STA

SM

Question 2

If boration is required per SPTA Step 2, the operator should borate with at least ___

Answer 2

1 CH Pump hard started

Question 3

___ to de-energize the CEDM MG set is the only step that should be performed as part of SPTAs to de-energize the CEDM MG set.

Answer 3

Opening the input breakers for L03 and L10…

• Load Centers should be de-energized for at least 5 seconds to ensure that enough time has elapsed to allow effects of MG set flywheel to taper off…thus preventing MG restart (re-energize after the 5 seconds for loads)

Question 4

Per SPTA step 3, Do not attempt to start the diesel if ___

Answer 4

…any High Priority trip alarm is present

Question 5

Per SPTA step 3, Do not attempt to close the output breaker if ___

Answer 5

…a fault exists on the vital bus.

Question 6

Per SPTA step 4, Do not ___ if a SIAS has occurred, until an ORP is entered.

Answer 6

…restore Letdown

Question 7

Per SPTA step 4, If QSPDS is not available or RCS Pressure is < 350# then use ___

Answer 7

…Appendix 2, Figures

Question 8

Per SPTA step 5, Check SIAS is initiated by ensuring ___

Answer 8

ESFAS signal has been initiated, sequenced loads are running and HPSI and LPSI are aligned to inject to the RCS

*RO should take manual action to start pumps and open injection valves if the sequenced loads are not in desired state

Question 9

Per SPTA Step 6, Use QSPDS to obtain sub cooling data (forced circulation use ___, natural circulation use ___)

Answer 9

RCS sub cooling for forced circulation, CET sub cooling for natural circulation

Question 10

Per SPTA step 7, FW available means that FW can be supplied to a SG when required. And Main Feed on RTO is ___ even if temperature has dropped low enough for RTO to stop feeding the SGs

Answer 10

Acceptable

Question 11

If an AF pump must be started, then attempt to start ___, ___ or ___ (in order of preference except for LOOP events)

Answer 11

AFN-P01, AFB-P01 or AFA-P01

NBA except when its a LOOP (or AFB is already running for some reason, etc)

Question 12

Do not attempt to bypass ___ or reset ___ to restore FW until the ORP is entered.

Answer 12

MSIV’s or reset AFA

Question 13

If AFA-P01 is to be started manually, ensure both ___ are closed before starting the pump. This ensures the ___, preventing an overspeed of the turbine.

Answer 13

Steam admission valves

Speed control circuit is reset before starting the pump

Question 14

When using SBCS in manual or using ADVs to control Tc, the ___ of the temperature band should be used. Using the ___ will allow a larger margin from the SG safety lift set point.

Answer 14

Lower end of the temperature band

Question 15

If available, ___ should be used to control Tc.

Answer 15

SBCS should be used (ADVs if not available)

Question 16

Check MSIS initiated by ensuring ___

Answer 16

1. ESFAS signal has been initiated

2. MSIV, MFIV and BD IVs are closed

Question 17

Tc should be stabilized using the ___

Answer 17

RCS Loop with the lowest Tc

Question 18

___ may be closed, if needed to reduce heat removal

Answer 18

Turbine drain valves

Question 19

___ may be shut down to reduce steam load

Answer 19

Main Feed Pumps

Question 20

Per SPTA Step 9, Opening CTMT IA isolation should be performed as needed to support ___ or to close ___

Answer 20

RCP Operation or to close RCP CBO valves