Surveillance and Testing System SATS

Question 1

What system components does SATS provide diagnostics for?

Answer 1

PPS Comparators
Contact-to-Logic level Converter Modules
2/3 Logic Modules
Div Logic Modules
Reactor Mode Selector Switch
Rod Clutch Coil Controller (RCCC) Logic Circuits

Question 2

Is SATS safety-related?

Answer 2

No. SATs auto function can instead be done manually if malfunctioning.

Question 3

Where is SATS powered from?

Answer 3

Commercial Power E390. (1st basement)

Question 4

Draw the SATS interface.

Answer 4

Question 5

What is the impact of SATS testing on PPS?

Answer 5

SATS testing does not inhibit PPS to respond to an event, nor does it contribute to reactor shutdown.

Question 6

Where are the SATS interface units located?

Answer 6

The 4 SATS interface units are located in each PPS room.

Question 7

What types of signal comm paths are used by SATS?

Answer 7

Type A - apply and remove PPS test voltages
Type B - data transfer path from PPS to SATS
Type C - request a computer interrupt

Question 8

What components separate SATS inputs/outputs from PPS?

Answer 8

Buffer Amplifiers

Question 9

How often must functional channel testing be performed on PPS?

Answer 9

Every 48 hours

Question 10

How does EFIS vessel level inoperability impact SATS?

Answer 10

Tripping vessel level system (EFIS/PPS vessel level) render SATS unable to meet TSR requirements.

Question 11

Why is isolation required from PPS during SATS computer system startup?

Answer 11

Spurious signals generated during computer power-up can cause an inadvertent reactor scram.

Question 12

What is the SATS room temperature limit?

Answer 12

85F

Question 13

What date sensitivity impacts SATS?

Answer 13

Y2K sensitive (unsure if this is still the case after upgrade)

Question 14

What is the PPS signal latch response time?

Answer 14

27 msec (SATS is faster than this, which is why it does not cause a trip)

Question 15

What are the two modes of SATS TESTA program?

Answer 15

AUTO - automatically tests PPS system by executing the complete SATS test series.
SINGLE - executes a specified test number.

Question 16

What is the purpose of SATS Initial Status Tests?

Answer 16

Determines which mode the reactor is operating in.

Question 17

What is he purpose of SATS Instrument Subsystem Tests?

Answer 17

Checks analog comparator will trip at setpoint and operability of analog and contact to logic level converter.
Ensures that channel trip will be seen by all 2/3 logic modules.
Also verifies that no PPS module failure is causing a false request for a trip

Question 18

What is the SATS Logic Test?

Answer 18

checks all combination of trip/resets to 2/3 logic module, div logic modules, and RCCC to ensure operation is correct

Question 19

What are SATS Final Status Tests?

Answer 19

similar to initial status tests. Also perform initial and final data comparisons to ensure everything remains within tolerance.

Question 20

What is the SATS Flow Coast Down Test (FLOW)?

Answer 20

Run while shutting down last primary pump.
Collects AC/DC ECP flows. 700 samples taken one second apart.

Question 21

What is the SATS Temperature Coast Down Test (TEMPS)?

Answer 21

Run at scram time to monitor temp decay curves of Rx.
4 Quad DTs
Reactor inlet and outlet temps
700 samples taken one second apart.

Question 22

What three SATS setpoint plateaus are there?

Answer 22

Two-pump
Three-pump
Depressurized

Question 23

What exception exists for EFIS vessel instruments concerning SATS?

Answer 23

EFIS Vessel Pressure instruments are not required in depressurized shutdown or operation and may be bypassed when irradiated fuel is removed from the vessel.

Question 24

What is the definition of Irradiated Fuel?

Answer 24

Fuel element after operation in the core with Rx power >20 kW unless the FE has been shown to have decay heat generation <30W.

Question 25

When does Shutdown PPS Checkout DOP not apply?

Answer 25

DOP 2.7.26 does not apply when <2 PCPs are operating.

Question 26

When must EFIS vessel level alarms or PPS vessel alarms be operable?

Answer 26

EFIS/PPS Vessel alarms must be operable with EFIS in manual and irradiated fuel elements in the vessel.