incore

Question 1

Limits and precautions
Wait how long? (or for equilibrium) after a power change for using an incore readings. Wait 10 min for calibration purposes (rhodium decay)

Answer 1

5 minutes

Question 2

The SPND signals are NOT reliable at the thermocouple temps > what temp?

Answer 2

1000 F

Question 3

SPNDs should NOT be used for power dist calcs at powers < what power?

Answer 3

<15%

Question 4

Use only 1 BIRO thermocouple at a time. With 2 selected, the average of the 2 will be used and the wrong corrected temperature will be applied?

Answer 4

true

Question 5

Incore thermocouples range

Answer 5

0-2300 F

Question 6

Incore thermocouples
Short or open circuit

Answer 6

Fails to reference temp

Question 7

Incore thermocouples
Ref junction goes up

Answer 7

Low indicated temp

Question 8

Incore thermocouples
Ref junction goes down

Answer 8

High indicated temp

Question 9

During a power change, there is a delay in the incore signals. All readings are invalid for at least how much time?

Answer 9

6 minutes

Question 10

PPC power supply normal
Swap to what supply on loss of main power with UPS

Answer 10

13.2kv, swaps to 1M 480V bus on loss of 13.2kv with UPS

Question 11

Control room PPC power

Answer 11

ATB

Question 12

How many sets of incore detectors

Answer 12

52

Question 13

How many thermocouples

Answer 13

52

Question 14

How many thermocouples available on ppc

Answer 14

50

Question 15

How many thermocouples can also feed the BIRO

Answer 15

16

Question 16

Thermocouple monitoring Biro may only select 1 at a time, if 2 are selected, what will be indicated?

Answer 16

The average of both will be indicated (average of whatever selected will be indicated)

Question 17

9G is normally selected where?

Answer 17

On the BIRO

Question 18

Tech specs
How many of how many incore thermocouples per quadrant must be Operable (how many total)?

Answer 18

2 of 4 BIRO incore thermocouples per quadrant must be operable (8 total).

Question 19

2 of 4 biro incore thermocouples per quadrant must be operable, if not… restore in how long or be in what in how much time?

Answer 19

7 days, or be in HSD in 6 hours and CSD in 30 hours

Question 20

Quadrant tilt
If exceed tilt limit, allowable power shall be reduced what percent for every what percent of tilt in excess of the tilt limit?

Answer 20

2% for every 1% tilt in excess of tilt limit

Question 21

Quadrant tilt
When > what percent, monitor tilt every how many hours if tilt alarm INOP or 7 days otherwise

Answer 21

When >15% monitor tilt every 12 hour if tilt alarm INOP or 7 days otherwise

Question 22

How many SPNDs, how many per how many elevations?

Answer 22

364
7 levels, 52 each level

Question 23

Axial power imbalance
If an axial power imbalance is not achieved within 24 hours, RX power shall be reduced to < what prevent power? Within how much time

Answer 23

<40% power within 2 hours

Question 24

When >40% monitor imbalance every how often? If alarm INOP, every how long otherwise?

Answer 24

Every 1 hour if alarm INOP, every 12 hours otherwise

Question 25

Backup recorder power supply

Answer 25

VBC

Question 26

How often for calibration for backup recorders?

Answer 26

Monthly for depletion correction

Question 27

System operation Computer failure Minimum number of required number of individual incore detectors is how many?

Answer 27

23

Question 28

System operation RCITS: a minimum of how many incore thermocouples must be operable and in the core when the RCS is drained down below the tops of the hot leg outlet nozzels (RTDs) when reactor vessel head is installed

Answer 28

2 incore thermocouples

Question 29

The delay associated with decay of Rh makes the SPND useable only under what conditions?

Answer 29

Steady state power conditions

Question 30

What how long after a power change prior to using an incore SPND reading?

Answer 30

5 mins

Question 31

Wait how long following a power level change before reading an incore SPND for calibration purposes

Answer 31

10 mins

Question 32

How many thermocouples go to FIDMS, how many go to RCITS?

Answer 32

50 to FIDMS 2 to RCITS

Question 33

FIDMS will substitute another SPND if one has not changed in how long when RX power is > what percent?

Answer 33

If one has not changed in a 6 minute time period when RX power >58%

Question 34

Backup recorders receives inputs from how many SPNDs?

Answer 34

36

Question 35

BIRO receives input from how many incore thermocouples, how many in each quadrant?

Answer 35

16, 4 per quadrant Min per TS is 8, 2 per quadrant

Question 36

How many SPND points required to be monitored at all time? How many for radial symmetry (quadrant power tilt), how many for axial symmetry (axial power imbalance)? How many points used for both radial and axial? Total for TS

Answer 36

16 for quadrant power tilt (radial) (8 in top, 8 in bottom) 9 for power imbalance (axial)(3 spnds in 3 strings) 2 points used for both So 25-2 =23 spnds required for TS

Question 37

Computer failure If all 4 Nis (5/6/7/8) are operable, tilt and imbalance calcs may be made…

Answer 37

manually with OCDs per OP-TM-300-202

Question 38

Computer failure If only 3 NI’s (5/6/7/8) are operable imbalance can be calculated with this instrumentation per what, however tilt will need to be calculated using what?

Answer 38

Imbalance calculated manually with OCDs per OP-TM-300-202 However, Titl will need to be calculated using MIS (backup recorders) per OP-TM-300-203

Question 39

Computer failure If less than 3 NI’s (5/6/7/8) are operable, then tilt and imbalance need to be caulcated using what?

Answer 39

Tilt and imbalance will need to be calculated using MIS (backup recorders) per OP-TM-300-203

Question 40

SPND signals should not be used for power distribution calcs at power levels less than what percent?

Answer 40

15%