40AO-9ZZ13 Loss of Class Instrument and Control Power (PN/PK)

Question 1

During 40AO-9ZZ13 Loss of Class Instrument and Control Power (PN/PK) what is Rx trip criteria?

Answer 1

• Lrdt ≥ 75% unable to restore

- Prdt ≥ 5 psig unable to restore

Question 2

How are the DG affected by a loss of PK

Answer 2

• Trips if running
• Cannot be started
• DG output brkr loses control power, must be locally opened

Question 3

How is AF affected by a loss of PKA-M41/ PKA-D21

Answer 3

• AFA trips on overspeed
• AFA MOV’s fail AS-IS
• AFA steam supply vlvs may open when power restored
• AFN losses Control power (swap to Battery Charger)
• Train A DCIV’s Fail OPEN with loss of indication

Question 4

How is AF affected by a loss of PKB-M42/ PKB-D22

Answer 4

• AFB loses control power (close brkr locally)

- Train B DCIV’s fail OPEN and indication lost

Question 5

How are the ADV’s affected by a loss of PK or PN

Answer 5

• Any PK 2 ADV’s fail CLOSED, permissive lost
• PNA/PNB 2 ADV’s fail CLOSED
• PNC/PND no effect

Question 6

How are MSIV’s/ FWIV’s affected by a loss of PK

Answer 6

• Normally aligned directly to battery
• Alternate source PKA/B-M41/42
• Fast Close on loss of power

Question 7

How is PPCS/PLCS/CVCS affected by a loss of PN?

Answer 7

• PZR LT’s fail low: CH pumps, LD flow, PZR Htrs affected if selected)
• PNA - BAMPS’s Trip due to RWT-LT-200 failing LOW
• PNB - LD isolates CHB-515 closes due to TT losing power

Question 8

How is BOP-ESFAS affected by a loss of PK/PN?

Answer 8

• Power auctioneered from PK & PN remains functional with one
• PNA/B - RU monitors lose power CREFES/ CPIAS/ FBEVAS auto actuate and cross channel
• Both PK/PN - disabled **when reenergized load shed and resequence occurs

Question 9

How is CEDMCS affected by a loss of PNA or PNB?

Answer 9

• 2 RTB open (loss of RPS logic)

- CEAC 1 lost on all CPC channels

Question 10

How is CEDMCS affected by a loss of PNC?

Answer 10

• A and C RTB’s open
• “Pacman” on mimic board
• Pulse counters zeroed for CEA with rod bottom lights
• CEDMCS cabinet C5 loses power
• Subgroup logic prevents motion for ALL subgroups in AS, MS, MG
• Can only move unaffected CEA in MI
• Emergency Boration required
• LCO 3.0.3

Question 11

How is CEDMCS affected by a loss of PND?

Answer 11

• B and D RTB’s open
• “Anti-Pacman” on mimic board
• Pulse counters zeroed for CEA’s with rod bottom lights
• CEDMCS cabinet C6 loses power
• Subgroup logic prevents moving any subgroup in AS, MS, MG
• Can only move unaffected CEA’s in MI
• Emergency boration required
• LCO 3.0.3

Question 12

How is PPS (RPS-ESFAS) affected by a loss of PN?

What action is required?

Answer 12

• Parameters that actuate on low parameter will be tripped
• Parameters that actuate on high parameter will NOT trip
• Low DNBR and High LPD trip due to CPC loss of power
• Bypass system remains functional (auctioneered power)
• 3/6 matrices lose half of their power RTB’s A&C or B&D will open
• Bypass ALL associated PPS trip bistables NOT bypassed on another channel

Question 13

How is PPS (RPS-ESFAS) affected by a loss of PK?

Answer 13

• Associated channel RTB opens (UV coil)

Question 14

Which class instrument and control power, if lost, would require entry into LCO 3.0.3?

Answer 14

PKB - RCS leakage detection: RU-1 loses power, Sump B CIV fail closed

PNC/D - CEA position indicators, need 2/3 position indicators channels operable

Question 15

What procedure would you use to address a Loss of PK Battery Charger

Answer 15

• Alarm Response

- NOT AOP unless board is also lost

Question 16

What additional action must also be done if a PK battery charger is lost

Answer 16

• Electricians perform Weekly battery ST - W/in 2 HOURS
• OPS perform disch. Eval.
• Place Spare Charger in SVC