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103 Cards in this Set
- Front
- Back
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What will cause an 1(2)X-03 Lockout?
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Sudden Pressure - Overcurrent - Ground (Neutral Overcurrent) - Current Differential - Overexcitation - Breaker Failure Relay (for H52-20/30) |
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How does a loss of DC control power affect 13.8Kv Breakers? |
Position indication is lost. - No protective/tripping features are operable. - Breakers remain in their current position. |
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What causes a Fast Bus Transfer?
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Bus Section 1(5) Lockout - 1(2)X-03 Lockout |
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What interlocks are there to close the H52-05(06)?
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CIRCUIT SWITCHER 112 (151) CLOSED - No lockout on H02 (03) - No lockout on BS 1 (5) - No lockout on 1(2)X-03 |
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What Trips Breaker H52-05(06)? |
111 (151) 'Breaker Failure' and 'Stability' - Lockout on H02 (03) - Lockout on BS 1 (5) - Lockout on 1(2)X-03 |
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What breaker is required to be closed before closing the 20/30?
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H52-05/06.
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What will trip the H52-20/30 Breaker?
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H52-05 (06) OPENS - BS 1 (5) - Lockout H-02 - Lockout 1(2)X-03 - Differential Relay, Overcurrent, Breaker Fail to Trip. |
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Explain what happens to the CCW pumps on an Undervoltage?
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The pump "rides the bus" - If pressure drops <35# the STBY pump will start. |
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What happens to CCW pump on an SI?
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The pumps continue to run.
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When are the CCW pumps stripped?
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On an SI concurrent with an UV.
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What directly causes the Radwaste CCW to isolate?
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An AUTO Containment Isolation. - An auto SI will cause a CI, which will isolate LW-63 and 64. |
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What causes CC-761 A/B RCP Thermal Barrier Outlet to shut?
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Trips shut @ 260 gpm outlet flow. |
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Where do the CCW HX's relief valves relieve to?
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The Unit 2 CCW Surge Tank. - Causes a dual unit CCW malfunction if a Unit 1 relief lifts. |
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What Systems leak into the CCW system?
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Excess Letdown - RCP Thermal Barrier - RHR HX (operating) - Primary Sampling - CVCS Non-regen HX (operating) - RHR Pump Seal Cooler (operating) - Containment Spray |
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What modes are CCW required to be OPERABLE?
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Modes 1-4 - Two CC pumps, two HX's. |
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What is ECCS Criteria?
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Peak cladding temp: <2200F - Oxidation: <17% - H2 generation: <1% - Cool-able geometry - Long term cooling maintained |
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What are the SI signals?
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PZR pressure (1735#) - Main Steam Line pressure (545#) - Containment Pressure (4.8#) - Manual - 2 of 3 for all except manual, which is 1 of 2 PB's |
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Explain SI Block.
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Blocks PZR pressure and Main Steam Line pressure SI signals. - Does NOT block Containment Pressure or Manual SI signals. - Blocking SI is enabled at <1990 # and auto unblocked at 2000 #. |
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What are the interlocks associated with the RHR to SI pump suction? |
You can "Swap on the fly" to the RHR pump discharge. - However, SI-896 cannot be opened unless the associated SI-857 is closed (prevent an unmonitored release). - SI-857 can not be opened unless the RHR pump discharge pressure is less than 210#. |
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What are the interlocks on the Sump B recirc suctions (851's)? |
Can't open an 851 unless ONE of the 897's are shut. - Can't open an 897 unless BOTH 851's are shut. |
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What is B Train of SI aligned normally?
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Connects to the A Train flow path to the Cold legs thru locked open manual valves. - Can be aligned for core deluge via SI-878 A & C (MOV: which does not get an SI signal) |
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Describe the SI Sequence?
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All 4 EDG's start Valves get OPEN signal -SI: Time 0 (ie when bus has voltage) -RHR: 5 Secs -AFW: 10.5 Secs (or 32.5 if the EDG loaded) -SW A&C: 15 Secs -SW B&D: 20 Secs -SW E&F: 25 Secs -Cont Acc Fans A&C: 38 Secs -Cont Acc Fans B&D: 42 Secs |
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What valves get an OPEN Signal on an SI?
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SI-841's: Accumulator Outlets - SI-878 B&D: Cold Leg Injection - *SI-852's: RHR Core Deluge* - MS-2019 and 2020: TDAFW - SW-2907 and 2908: Cntmt Cooler Returns |
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When is LTOP required? |
Mode 4 when Less than or equal to 285F. - Mode 5 and 6 when the head is on. - Only one SI pump may be aligned for injection (one in pullout). |
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At what point are 2 SI Accumulators required to be OPERABLE?
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Mode 3 when press is > 1000#.
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When is the RWST required to be OPERABLE?
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Modes 1-4.
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In what modes are 2 Trains of ECCS required and in what modes are only 1 Train Required? |
Modes 1-3: Two Trains. - Mode 4: One Train. |
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What parameters on the RWST have Tech Specs associated with them? |
Level (95%) - Boron (2800-3200 ppm) - Temp (42.5 - 97.5F) |
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What parameters on the SI Accumulators have Tech Specs associated with them?
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Level (6% - 49%) - Boron (2700 - 3100ppm) - Press (700-800#) |
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What happens on an X-02 Lockout?
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X-01 Lockout - Main Generator Lockout - A-01 and A-02 Feeder Breaker Trip |
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What happens on an X-04 Lockout?
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Opens the high side and low side breakers. |
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Which 4160 Safeguards busses have double breaker isolation on the feeder, and what is the interlock associated with those breakers?
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A-04 to A-06 - The breaker on A-04 must be closed first. |
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What is required to close the A-03 and A-04 Feeder Breakers?
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X-04 High Side must be CLOSED. - Cross-ties to A-01 and A-02 OPEN. - Cross-ties from U1 to U2 OPEN. |
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What happens on a loss of DC Control Power to 4160 Vac Breakers?
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Loss of all indication. - Common Critical Control Power Failure Alarm. - Stored Energy Breakers can still be tripped and shut locally. |
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What are the initiation signals for Containment Spray? |
25# Containment Pressure. - Manual (both PB's). - Notice that an SI signal does not actuate Spray. |
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What is the Containment Spray Sequence? |
SI-860's Open IMMEDIATELY. - 10 Seconds: Spray Pumps start. - 2 Minutes: SI-836's Open to inject NaOH. |
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What are the interlocks associated with the SI-871's? |
The SI-870's (Spray Pump Suction from RWST) must be shut to open the SI-871's (Spray Pump Suction from RHR), and vice versa. - RHR Discharge Pressure must be less than 210#. |
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When are SI-860 A&C Open, and Shut? - What is the purpose of SI-860 B&D? |
SI-860 A&C Spray Pump Full Flow Discharge are open on Injection Phase and shut on Recirc Phase. - SI-860 B&D Spray Pump Reduced Flow Discharge Valves prevent RHR pump RUNOUT. |
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In what modes is the Containment Spray System required to be OPERABLE? |
Modes 1-4 - Two Trains of Spray, four Accident Fans, and >43% in the Spray Add Tank. |
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Which 480 VAC busses have normal and alternate DC control power from the same train? |
1B-04 normal and alternate DC control power from Bravo Train. - 2B-03 normal and alternate DC control power from Alpha Train. |
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What is an Amptector? |
It trips 480 VAC breakers on overcurrent. - Uses power from breaker stabs. |
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What are the interlocks associated with the X-11/12/13/14 Transformers? |
The high side breaker must be closed before closing the low side breaker. - If the high side breaker trips the low side breaker will also trip. |
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Explain the normal and alternate feeder breakers for 1(2)B-32/42 MCC? |
Having both breakers closed at the same time negates any overload protection. - The alternate breaker compartment is normally left empty. |
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What pumps can be powered from B-08 and B-09? |
SW Pumps - Charging Pump - CCW Pumps - RHR Pumps |
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What Service Water Pumps can be powered from B-08 and B-09? |
P-32B and F: B-08 - P-32C and E: B-09 |
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What happens when you swap to alternate power (B-08/09)? |
Control capability is removed from the control room. - Pumps are controlled from C-45. |
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What is the normal and alternate feed for the ABT in the TSC 18.5'? |
Normal: 1B-01. - Alternate: Dinky Diesel. - Normal Seeking. |
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What Busses are stripped on a Unit 1 SI? - What Busses are stripped on a Unit 2 SI? |
1B-31, B-43 - 2B-31, B-33, B-21 |
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What 480 volt "Alpha" component has a Bravo Train power supply? |
K-3A Service Air Compressor: 1B-04. |
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What components are stripped on an SI? |
CCW Pumps (with a concurrent UV)' - PZR Backup Heaters. - Control Heaters. - Service Air Compressor (unit specific). - STBY Stm Generator Feed Pump (unit specific) - Electric Fire Pump (UNIT 1 ONLY) |
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What is the function of the Static Transfer Switch Interlock? |
Prevents transferring more than one channel to dirty power. |
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Where are the Instrument Bus Transfer Switches located and what is their purpose? |
In the Computer Room and the Control Room. - Used to transfer the Instrument Busses to and from the Spare Inverters. |
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Describe the interlock on the Instrument Bus Transfer Switches? |
There are no interlocks for the Instrument Bus Transfer Switches, they are controlled ADMINISTRATIVELY. - Controlled so that only one unit of each channel can be on the spare inverter. |
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What would cause an inverter to reject the bypass source, and how are they re-synchronized? |
Bypass source not within 60+/-.5 Hz or <90 volts. - Red and Blue inverters auto re-sync, White and Yellow must be reset locally (PB). |
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What is the programmed level for the PZR? |
20-47%. |
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What is the PZR high level Rx trip? - What is the PZR low level Rx trip? |
80% - There is NO LOW LEVEL RX TRIP! |
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What happens when PZR level lowers to 12%? |
Lo Level Alarm. - Heater Cutout. - LD Isolation. |
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What is programmed Tave? |
547-576F - @100% Power: Level 47%, Tave 576F |
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What is the sequence of events in the PZR from NOP and Rising? |
2235# NOP. 2250# Proportional Heaters OFF. 2260# Spray valves start to OPEN. 2310# Spray valves are FULLY open. 2335# PORV's lift. 2365# Rx TRIP. 2485# SAFETIES lift. 2785# Safety LIMIT. |
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What is the sequence of events in the PZR from NOP and Lowering? |
2235# NOP. 2220# Proportional Heaters full ON. 2210# Back up Heaters full ON. 2205# TS low pressure limit. 2185# Low pressure ALARM. 1925# Low pressure Rx TRIP. 1735# SI. |
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Describe the Spray Valves. |
Fail CLOSED AOV's. - Normally supplied by IA with a N2 backup. - Max flow is 200gpm per valve: prevents lifting a PORV on a 10% load shed. |
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How many RTD's are there for the Spray valves, Safeties, and PORV's? |
There are RTD's upstream of each Spray valve: LOW Temp Alarm. - There are RTD's downstream of each Safety: HIGH Temp Alarm. - There is a common RTD downstream of the PORV's: High Temp Alarm. |
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What is the capacity of the Safeties based on? - What is the capacity of the PORV's based on? |
The capacity of the Safeties is based on not exceeding 110% design pressure from an insurge caused by complete loss of load w/ no Rx trip, Steam Dumps, PORV's or Spray. - PORV's are based on a 50% load loss WITH rods and dumps. |
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When is LTOP required? |
Tech Specs require LTOP to be armed when RCS is <285F AND the RCS is not vented to atmosphere. |
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What is required to get the LTOP Red Light armed? |
Key in enable. - Block Valve open. |
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When is the PRT rupture disc designed to blow? |
100 psid. |
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How is thermal stratification prevented in the surge line? |
By limiting the Delta T between the PZR liquid and Hot Leg to <210F. |
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When should boron concentrations be equalized between the PZR and RCS, and how is it accomplished? |
Following a change in RCS boron concentration of >50ppm. - By increasing spray flow, by energizing additional heaters. |
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What is the location of D-07 and D-08, and what are their power supplies? |
Vital Switchgear Room. - D-07: 1B-39 (Alpha Train). - D-08: 2B-49 (Bravo Train). |
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What is the location of D-107 and D-108, and what is their power supplies? |
PAB, White and Yellow Inverter Rooms. - D-107: 2B-39 (Alpha Train). - D-108: 1B-49 (Bravo Train). |
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What is the location of D-09 and D-109, and what are their power supplies? |
D-09: Vital Switchgear Room, 1B-49, or 2B-39 - D-109: White Inverter Room, 1B-32, or 2B-42, or B-81 |
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Under what circumstances do the battery charger contactors trip open? |
Loss of power. - SI on either unit AND associated bus (A-05/A-06) normal feeder open. - (SI must be reset OR the normal feeder breaker closed to close the contactor from control room). |
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What is the purpose of the key by the contactor? |
Bypasses the trip signal and allows shutting the contactor. |
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What DC busses use Kirk-Key Interlocks and which use mechanical interlocks? |
D-301: Kirk-Keys. - D-302: Mechanical. |
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What is the plant response to a loss of D-01, D-02, D-03, D-04? |
D-01: Dual Unit Trip, G-01 inoperable. - D-02: Dual Unit Trip, G-04 inoperable. - D-03: G-02 inoperable. - D-04: G-03 inoperable. |
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What does a negative DP across the Labyrinth Seal indicate, and what other alarm would most likely be actuated? |
Seal pressure is LESS than RCS, ie RCS is flowing up thru the seal. - High Temp alarm at 150F. |
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Where does Seal #1 leakoff flow? - Where does Seal #2 leakoff flow? - Where does Seal #3 leakoff flow? |
VCT, 3 gpm. - Thru the standpipe, then to the RCDT, 3 gph. - Sump A 3 gpd. |
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What is the purpose of the Thermal Barrier? - What will isolate flow? |
To cool the RCP seal package, in the event of a loss of seal injection.
- High Flow >260 gpm (indicates a leak in the Thermal Barrier). |
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What does the Amber Light for the RCP's indicate? |
Indicates the required 350# lube oil pressure interlock is met. |
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After the 350# lube oil pressure interlock is met, when can the RCP be started, and when can the lift oil pump be secured? |
2 minutes after 350# is reached the RCP can be started. - 1minute after the RCP is started the lift oil pump can be secured. |
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What parameters have RCP trip criteria? |
RCP Shaft Vibes - RCP Frame Vibes - #1 Seal Leakage - #1 and #2 Seals Combined Leakage - #1 Seal Outlet Temp - Stator Temp - Motor Bearing Temp - Lab Seal DP not positive - Fire |
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What do the X-01 lockouts feed? |
Generator output breaker - X-01 High side (F52-122/142) - X-02 Low side (A52-1&26/17&27) |
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Describe the GE-Hitachi Breakers. |
AIR TO OPEN, SPRING TO CLOSE. - Line Breakers 111, 121, 123, Q303, and 151. - Auto trip and lockout 185# air pressure. - Auto trip and lockout 64# SF6 pressure. |
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Describe ABB Breakers. |
BREAKERS FAIL AS IS. - All bus ties. - Breakers lockout and fail as is on low SF6 pressure, and low spring pack pressure. - O,C,O,C,O |
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What are the interlocks on the motor operated disconnects? |
122/142 must be OPEN to operate. |
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Describe how the Circuit Switchers are opened on an X-03 lockout? |
112 or 152 opens after the following 3 breakers open: BS 1-2/ 4-5 - BKR 111/151 - H52-05/06 (20&30 also open). |
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What causes RC-427 to shut? |
PZR level <12%. |
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What are the interlocks on CV-200A/B/C? |
RC-427 must be full open AND have power available. - At least one charging pump must be running. - CV-371 and CV-371A must be open. (CIV's downstream of orifices). |
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What is the purpose of PCV-135, and what is the fail position? |
Maintains BACKPRESSURE on the LD at 250# and prevents flashing. - Fails open (remember there is a relief valve downstream). |
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What are the level setpoints associated with LT-141 (Red)? |
78% HLA. - 56% CV-112A begins to modulate. - 8% LLA. - 4% Emergency MU from RWST. (2 of 2) |
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What are the level setpoints associated with LT-112 (Blue)? |
78% CV-112A Diverts to HUT. - 70% Divert resets. - 28% Auto MU stops. - 17% Auto MU starts. - 4% Emergency MU from RWST. (2 of 2) |
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What interlock is on CV-112B Charging Pump Suction from RWST? |
CV-112B must be off shut seat (going open) before CV-112C (VCT Outlet) will shut. |
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What are the normal and alternate power supplies to the charging pumps? |
1(2)P-2A: 1(2)B-03 B-08(09) - 1(2)P-2B: 1(2)B-03 2(1)B-03 - 1(2)P-2C: 1(2)B-04 |
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What is the PZR level band? |
20-47% - Auto charging pump speed based on auctioneered High Tave. |
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How much flow is let down by the Excess letdown heat exchanger, and where can it be directed? |
10gpm: equivalent to total flow going into RCS past lab seals. - RCDT or the VCT. |
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What are the normal and alternate power supplies to the RHR Pumps? |
Normal 1(2)P-10A: 1(2)B-03 1(2)P-10B: 1(2)B-04 - Alternate Unit 1: B-08 Unit 2: B-09 |
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When aligned to alternate power, where are the RHR pumps controlled? |
C-45 |
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What is the purpose of RH-624 and RH-625? - What is their fail position? - How are they controlled? |
Temperature Control Valves. - Fail Open (outlets of the HX's). - Throttled from Control Room. |
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What is the purpose of RH-626? - What is it's fail position? - How is it controlled? |
RHR flow control valve. - Fails closed (so as to not rob flow from the HX's). - Automatically controlled by FE-626. |
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What is the normal position of RH-700, RH-701, and RH-720 at power? - What is the interlock associated with those valves? |
Normally SHUT and DE-ENERGIZED (prevent inadvertant opening due to a hot smart short). - RH-700 and RH-720 will not open unless RCS pressure is < 425#. |
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What are the SI-852's and what is special about them? |
Low Head SI Core Deluge. - They are the only valves that have to reposition during an SI. -AND- They have a pre-set throttle position: taking the CS to close moves the valve to 43% open; from then on it is a demand MOV. |
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What are the SI-857's? - What's special about them? - What are the interlocks with them? |
RHR Pump Discharge to SI Pump Suction (Piggyback valves for Hi Head Recirc). - They are Demand MOV's - Cannot open 896's unless 857's are shut, but you can shift from RWST to RHR "on the fly". - And- RHR pump discharge must be < 210# to open the 857's. |
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In Mode 6, when is only one RHR loop required to be operable and in operation? |
When the cavity level is > 23 feet only 1 loop is required to be operable and in operation. |
