Inadvertent PPS-ESFAS AOP

Question 1

When an ESFAS actuation occurs, the very first thing that the operator MUST do is ___

Answer 1

…VERIFY that the actuation is Valid

Question 2

Equipment which operated on an inadvertent PPS-ESFAS actuation that has been placed in override or an anti-pump condition ___

Answer 2

…may be INOPERABLE based on Plant conditions and MODE

Question 3

An AFAS actuation will feed cold CST water into the SG’s, which may cause ___

Answer 3

…a positive reactivity insertion and subsequent power excursion due to cool down of SG’s (and cooling of RCS cold legs)

Question 4

For inadvertent AFAS, the instructions will first direct the operator to ___

Answer 4

…Override and Operate the AF valves as needed to control SG Level.

• May isolate SG blowdown, address effects on power and SG chemistry

Question 5

Sustained low speed operations of AFAP01 should be avoided. Pump sleeve bearings and pump internals can be damaged due to ___

Answer 5

…Loss of Lubrication

Question 6

AFA-P01 operations requirements include:
___
___
___

Answer 6

1. Minimum idle speed is 800 RPM
2. Minimum sustained speed is 1000 RPM
3. Operation > 5 minutes with speed < 1000 RPM is prohibited and 40AO-9ZZ17 required operator to trip AFAP01

Question 7

The inadvertent CIAS actuation section of the procedure will be entered ONLY if ___

Answer 7

…the CIAS isn’t accompanied by inadvertent SIAS

Question 8

An inadvertent CIAS would isolate ___

Answer 8

1. Letdown
2. WC to CTMT
3. RCS Sampling
4. CTMT Sumps
5. RU-1 (CTMT Rad Monitor)

• Procedure guides to restore all of these (ZZ05)

Question 9

Isolation of CTMT Sumps and RU-1 will put us in the following LCO’s:
___

Answer 9

LCO 3.4.16.D which requires entry into 3.0.3

• To exit 3.0.3 must restore CTMT Sump monitoring

Question 10

For a CS pump that has been anti-pumped and needs to be restarted and a SIAS has NOT actuated, then an ___

Answer 10

…AO will need to Cycle the breaker Control Power

Question 11

Inadvertent CSAS has operator FIRST stop the actuated CS pump. Direction it then given to close the open CS Header Isolation Valve; this is done to ___

Answer 11

…prevent RWT from draining into CTMT thru this open valve.

Question 12

Relief valves were installed on the NC return header inside CTMT. This prevents the possibility of hydraulically locking the NC CTMT Isolation valves OPEN after an ___

Answer 12

…HPSC leak pressurizes the NC system

Question 13

If component cooling water to an RCP and motor oil lube systems is NOT available, or an oil leak occurs during operation, operator is alerted as soon as cooling to oil system is lose and has a time period of ___

Answer 13

…at least 30 minutes in which to reduce power

• Bearing seizure concerns

Question 14

An inadvertent CSAS isolates IA to CTMT, therefore the following valves will Fail Closed:
\_\_\_
\_\_\_
\_\_\_
\_\_\_

Answer 14

1. CHAUV516 Letdown to Regen HX
2. CHBUV515 Letdown to Regen HX
3. SGAUV500P SG 1 Common Upstream Iso Valve
4. SGBUV500R SG 2 Common Upstream Iso Valve

• First take HS for each valve to CLOSE prior to opening IA to CTMT when restored. Would be uncontrolled restore of LD and BD

Question 15

On an inadvertent MSIS and RX Power < 5%, the operator is directed to ___

Answer 15

…control SG Pressure with ADV’s and establish feed to SG’s with AFAP01 and AFBP01

Question 16

On an inadvertent RAS, IF SDC was lost as a result of the running LPSI pump trip, THEN perform the following for the previously running train:
\_\_\_
\_\_\_
\_\_\_
\_\_\_

Answer 16

1. Throttle LPSI SDCHX Bypass valve to 20% open
2. Close both LPSI Injection valves on appropriate train
3. Override and start the LPSI Pump
4. Restore SDC Flow

Question 17

On an inadvertent SIAS or SIAS/CIAS, the AOP requires the following actions:
\_\_\_
\_\_\_
\_\_\_
\_\_\_
\_\_\_
\_\_\_

Answer 17

1. RCS < 2000# = Override and stop running HPSI’s
2. RCS < 300# = And LPSI not used for SDC, override and stop LPSI pumps
3. Reset PZR Heaters as needed for pressure control
4. If LD isolated, reduce CH Pumps to 1 and perform Loss of Letdown AOP
5. Restore CEDM cooling if necessary
6. If necessary, override and operate SDC valves as needed for RCS Temperature control

Question 18

A ___ trips both the CTMT Normal and CEDM ACU’s

Answer 18

SIAS

Question 19

If the SIAS signal were reset before the ACU’s were returned to service, the SIAS Start Interlock would still prevent the ACU’s from running. The HS must be ___

Answer 19

…placed to STOP; this clears the interlock, allows auto-start

Question 20

SI Pump mini-flow valves close on a RAS to prevent ___

Answer 20

…flow of water to the RWT, which precludes contamination of the RWT and increases in dose in the area of the RWT.

Question 21

Runtimes > 1 hour for SI Pumps on mini-flow require ___

Answer 21

…evaluation by Engineering