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Systems Test 2 Flashcards

1
Q
  • LOT 201.06 CVCS*
    • *

What will generate a letdown valves sequence incorrect alarm?

A

Shutting MOV-465 OR MOV-468 prior to FV-011

Switches located on CP004.

  • Note:*
  • FV-011 shuts first to prevent water hammer in the regenerative HX.*
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2
Q
  • LOT 201.06 CVCS*
    • *

At what pressure will the VCT relief valve (CV-3101) lift?

A

75 psig

Relieves to the RHT.

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3
Q
  • LOT 201.02 RCS*
    • *

What is Keff, RTP, and Tavg when the plant is in MODE 1?

A

Power Operation:

  • Keff:*
  • *≥ 0.99**
  • RTP:*
  • *> 5%**
  • Tavg:*
  • *≥ 350 ˚F**
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4
Q
  • LOT 202.32 RCB Chilled Water*
    • *

With regards to the RCB Chilled Water system, what happens during a SI or a LOOP?

A
  • RCFC Chilled Water OCIVs:*
  • *Close on SI OR LOOP**
  • RCFC CCW OCIVs:*
  • *Open on SI**
  • *Remain Closed on LOOP**
  • Operators must open them (30 min req. [EOPs])*

RCFC CCW OCIVs will NOT open unless Chilled Water OCIVs shut.

  • Note:*
  • If SI and LOOP happen concurrently, SI wins and CCW OCIVs open.*
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5
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

Where does the RCDT relief valve relieve to?

A

Containment Normal Sump

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6
Q
  • LOT 201.41 ESF Load Sequencer*
    • *

Plant Conditions:

  • ESF DG in parallel with offsite
  • SI occurs

What does the ESF DG load sequencer do?

A

Output bkr will open and then MODE I will occur

If output bkr does not trip within 1 sec, incoming breaker will trip, sequencer will strip bus w/ exception of LC breakers and MODE III sequence will run.

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7
Q
  • LOT 201.05 RCPs*
    • *

What is the pressure, flowrate, and flowpath of the #1 Seal?

A
  • Pressure:*
  • *2250 psig → 30 psig**
  • Min D/P: 220 psid*
  • Flowrate:*
  • *8 gpm → 3 gpm**
  • Suction:*
  • *CVCS**
  • Discharge:*
  • *VCT ****
  • CCP Suction*
  • *Seal #2**

Inlet temperature ≈ 110 ˚F (Do not exceed 230 ˚F)

≈ 5 gpm goes to pump radial bearing and thermal barrier HX

Note:
On ΦA CI, Seal return to VCT isolates and relief will lift (150 psig) to send water to PRT.

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8
Q
  • LOT 201.02 RCS*
    • *

What are the piping penetrations off the hot legs?

A
  • Loop 1:*
  • *RHR “A” Suction**
  • *SI “A” Recirc**
  • *Sampling**
  • Loop 2:*
  • *RHR “B” Suction**
  • *SI “B” Recirc**
  • Loop 3:*
  • *RHR “C” Suction**
  • *SI “C” Recirc**
  • *Sampling**
  • Loop 4:*
  • *PZR Surge Line**
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9
Q
  • LOT 201.06 CVCS*
    • *

With regards to LT-112 and LT-113, how is level controlled in the VCT?

A
  • 95%*
  • *112A Full Divert**
  • LT-112 AND LT-113*
  • *Alarm**
  • LT-113*
  • 68% - 95%*
  • *112A modulates diverting to RHT**
  • LT-112*
  • 48%*
  • *Stops Auto M/U**
  • LT-112*
  • 28%*
  • *Starts Auto M/U**
  • LT-112*
  • 15%*
  • *Alarm**
  • LT-112 AND LT-113*
  • 3%*
  • *Shifts CCP suction from VCT to RWST (112C / 113B)**
  • *Isolates VCT outlet (112B / 113A)**
  • LT-112 AND LT-113*
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10
Q
  • LOT 201.20 SSPS*
    • *

Which actuation train’s urgent alarm will result in a logic train’s urgent alarm?

A

Actuation Train “A” → Logic Train “R”

Actuation Train “B” → Logic Train “S”

Actuation Train “C” does NOT result in a logic train’s urgent alarm.

Actuation Train “C” trouble alarm does result in a Logic Train “R” AND Logic Train “S” trouble alarm.

  • Note:*
  • Urgent alarms on CP026.*
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11
Q
  • LOT 201.06 CVCS*
    • *

What will close the letdown CIVs (CV-023 / CV-024)?

A
  • *CI ΦA**
  • *High Energy Line Break**
  • 112.7 ˚F [1/8] in MAB room shuts associated valve*
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12
Q
  • LOT 201.06 CVCS*
    • *

What will automatically close the VCT outlet isolation valves (MOV-112B/MOV-113A)?

A
  • MOV-112B AND MOV-113A*
  • *SI**
  • Opens MOV-112C AND MOV-113B*
  • MOV-112B*
  • *VCT Level - Low 2 (3%) [LT-112]**
  • Opens MOV-112C*
  • MOV-113A*
  • *VCT Level - Low 2 (3%) [LT-113]**
  • Opens MOV-113B*

To ensure CCPs have suction water at all times, RWST supply valves (MOV-112C/MOV-113B) must be full open to close respective VCT Outlet valve (MOV-112B/MOV-113A).

  • Note:*
  • Holding the manual switches for the valves (112B/C and 113A/B) will override any auto functions and the valves will position as selected.
  • Located on CP004.
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13
Q
  • LOT 201.02 RCS*
    • *

What is Keff, RTP, and Tavg when the plant is in MODE 4?

A

Hot Shutdown:

  • Keff:*
  • *< 0.99**
  • RTP:*
  • *0%**
  • Tavg:*
  • *350 ˚F > Tavg > 200 ˚F**
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14
Q
  • LOT 201.06 CVCS*
    • *

When will the letdown temperature divert valve (TCV-143) automatically bypass the demins?

A

Letdown HX Discharge Temp - High (137 ˚F)
OR
BTRS Demin Inlet Temp - High (157 ˚F)

Located on CP004

  • Note:*
  • Loss of Air/voltage fails to divert.*
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15
Q
  • LOT 201.05 RCPs*
    • *

What must pressure in the bearing oil lift system be in order to start a RCP?

A

600 psig

  • Blue permissive light on CP005
  • Bearing Oil pump must be running to start pump. (Not required for light however)
  • Must be operated for ≥ 2 mins by procedure prior to starting RCP.
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16
Q
  • LOT 201.41 ESF Load Sequencer*
    • *

What is the MODE III sequence of starting loads?

A
  • 1 Sec:*
  • *480 V Buses**
  • 6 Sec / 10 Sec:*
  • *HHSI / LHSI**
  • 15 Sec:*
  • *Containment Spray** (1st Try)
  • *RCFC (11/12)**
  • 20 Sec / 25 Sec:*
  • *CCW / ECW**
  • 30 Sec:*
  • *AFW**
  • 35 Sec:*
  • *CR / EAB HVAC (Emergency MODE)**
  • *Essential Chilled Water Pump**
  • *Standby Essential Chiller**
  • 40 Sec:*
  • *Containment Spray** (2nd Try / Locks in)
  • 240 Sec:*
  • *Running Essential Chiller(s)**
  • 280 Sec:*
  • *Sequence Complete**
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17
Q
  • LOT 201.41 ESF Load Sequencer*
    • *

What is the MODE I sequence of starting loads?

A
  • 6 Sec / 10 Sec:*
  • *HHSI / LHSI**
  • 15 Sec:*
  • *Containment Spray** (1st Try)
  • *RCFC (11/12)**
  • 20 Sec / 25 Sec:*
  • *CCW / ECW**
  • 30 Sec:*
  • *AFW**
  • 35 Sec:*
  • *CR / EAB HVAC (Emergency MODE)**
  • *Essential Chilled Water Pump**
  • *Standby Essential Chiller**
  • 40 Sec:*
  • *Containment Spray** (2nd Try / Locks in)
  • 240 Sec:*
  • *Running Essential Chiller(s)**
  • 280 Sec:*
  • *Sequence Complete**
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18
Q
  • LOT 201.15 RCS Temperature Monitoring*
    • *

What are the RCS NR temperature instruments used for?

A
  • Tavg:*
  • *OT∆T**
  • *OP∆T**
  • *FW Isolation**
  • P-4 w/ Tavg - Low (574 ˚F)*
  • *P-12**
  • < 563 ˚F [2/4] Blocks steam dumps*
  • Auctioneered High Tavg:*
  • *Rod Control**
  • Indication on CP005 is Auctioneered Low Tavg*
  • *Steam Dumps**
  • *PZR Level Control**
  • Auctioneered Low Tavg:*
  • *C-17**
  • Auctioneered High ∆T:*
  • *Rod Insertion Limit**

3 in HL (120˚ apart for laminar flow concerns) and 1 in CL per loop.

Also has 3 fast response RTDs in CL per loop.

  • Note:*
  • 3 HL RTDs are averaged together to give signal. If 1 fails the system will automatically kick it out.*
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19
Q
  • LOT 201.02 RCS*
    • *

What size are the pipes in the RCS?

A
  • Cold Leg:*
  • *27.5”**
  • Hot Leg:*
  • *29”**
  • Bigger than cold leg to accommodate expansion of coolant.*
  • Intermediate Leg:*
  • *31”**

Inside Diameter of pipes.

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20
Q
  • LOT 201.15 RCS Temperature Monitoring*
    • *

What are the RCS WR temperature instruments used for?

A

PAMS

  • *COMS**
  • Auctioneered Low Tc (PCV-656A) and TH (PCV-655A)*

H/U and C/D

Aux S/D Panel

1 in HL and 1 in CL per loop.

  • Note:*
  • Located on CP018 and ICS
  • ASP for TC only.
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21
Q
  • LOT 201.02 RCS*
    • *

What is Keff, RTP, and Tavg when the plant is in MODE 2?

A

Startup:

  • Keff:*
  • *≥ 0.99**
  • RTP:*
  • *≤ 5%**
  • Tavg:*
  • *≥ 350 ˚F**
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22
Q
  • LOT 201.02 RCS*
    • *

What are the piping penetrations off the cold legs?

A
  • Loop 1:*
  • *PZR Spray**
  • *SI Train “A” Injection** / RHR “A” Return
  • Same Penetration*
  • *Normal Charging**
  • Loop 2:*
  • *SI Train “B” Injection** / RHR “B” Return
  • Same Penetration*
  • Loop 3:*
  • *SI Train “C” Injection** / RHR “C” Return
  • Same Penetration*
  • *CVCS Alternate Charging**
  • Loop 4:*
  • *PZR Spray**
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23
Q
  • LOT 201.02 RCS*
    • *

What would Loop 1 RCS flow indicate if the high pressure tap on loop 1 ruptures?

A

All loop flows in that loop fail to zero

Loop flow consists of 1 High Pressure (Outside of elbow) and 3 Low Pressure (Inside of elbow).

↓∆P = ↓HP - LP → Flow ↓

Note:
Rupture of a Low pressure tap would result in Flow failing high on 1 of 3 flow instruments.

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24
Q
  • LOT 201.02 RCS*
    • *

What is Keff, RTP, and Tavg when the plant is in MODE 6?

A

Refueling:

  • Keff:*
  • *≤ 0.95**
  • RTP:*
  • *0%**
  • Tavg:*
  • *≤ 140 ˚F**

Fuel in the Rx vessel w/ vessel closure bolts less than fully tensioned or head removed.

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25
Q
  • LOT 201.22 ESF*
    • *

What systems make up the ESF system?

A
  • RCS M/U:*
  • *ECCS**
  • HHSI, LHSI, SI, Accumulators*
  • S/G M/U:*
  • *Aux FW**
  • Containment:*
  • *Containment Isolation**
  • *Containment Heat Removal**
  • *Containment Combustible Gas Control**
  • HVAC:*
  • *EAB / CRE HVAC**
  • *FHB HVAC**
26
Q
  • LOT 201.06 CVCS*
    • *

What will automatically close MOV-033A/B/C/D and, by doing so, isolate RCP seal injection?

A
  • *CI ΦA **
  • *WITH**
  • *Charging Header Pressure - Low (≤ 560 psig)**
  • Indicated on CP004 (PT-204)*

Note:
Holding switch on CP004 in “OPEN” position will override auto closure signal and allow valve to stay open.

27
Q
  • LOT 201.02 RCS*
    • *

How many NR hot leg and NR cold leg temperature instruments are there in each loop of the RCS?

A
  • *3 Hot Legs**
  • Located 120˚ apart for stratification purposes*
  • *1 Cold Leg**
  • Located downstream of RCPs (Stratification not a concern)*

Feed into Tavg and ∆T.

28
Q
  • LOT 201.06 CVCS*
    • *

At what pressure will the letdown relief valve (CV-3100) lift?

A

600 psig

Relieves to PRT.

29
Q
  • LOT 201.22 ESF*
    • *

What are the ESF support systems?

A

ECW cooling pond

ECW

CCW

ESF DG’s

30
Q
  • LOT 201.05 RCPs*
    • *

What is the pressure, flowrate, and flowpath of the #2 Seal?

A
  • Pressure:*
  • *30 psig → 10 psig**
  • Flowrate:*
  • *3 gpm → 3 gph**
  • Suction:*
  • *Seal #1**
  • Discharge:*
  • *RCDT**
31
Q
  • LOT 201.02 RCS*
    • *

What is Keff, RTP, and Tavg when the plant is in MODE 5?

A

Cold Shutdown:

  • Keff:*
  • *< 0.99**
  • RTP:*
  • *0%**
  • Tavg:*
  • *≤ 200 ˚F**
32
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

What is the setpoint the PZR Safety valves?

A
  • *2485 psig ± 1%**
    • 2% / - 3% (LCO 3.4.2.2)*

3 safety valves

Keeps RCS ≤ 2735 psig w/:

  • Turbine Trip w/ NO Rx Trip
  • PORVs do NOT operate
  • Steam dumps do NOT operate
  • Note:*
  • Relieves to PRT*
33
Q
  • LOT 201.20 SSPS*
    • *

What ESF actuations are NOT defeated when the master relay defeat switch is in the “defeat/cvi available” position?

A
  • *CVI**
  • Will be defeated in “Defeat All” Position*
  • *COMS**
  • LTOP Relief*

PZR PORVs

  • *PZR Level - Low (17%)**
  • Letdown Isolation*
  • *VCT Level - Low (3%)**
  • Swapover to RWST*
  • *Boric Acid Tank Level - Low 2 (29,584 gal)**
  • Isolates Purification*
  • *RHR Flow - Low (925 gpm [5 sec TC])**
  • Trips RHR pump*
  • *SI Auto Recirc**
  • LHSI / HHSI takes suction on containment sump vice RWST*
34
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

What drains directly into the RCDT?

A
  • *RCP Seal #2 Leakoff**
  • *CVCS Valve Stem Leakoffs**
  • *Flange Leakoff**
  • *Excess Letdown**
  • Alternate Path*
35
Q
  • LOT 201.20 SSPS*
    • *

What supplies power to the Solid State Protection System (SSPS) logic cabinets?

A
  • Channels 1 and 3 of Logic R:*
  • *DP1201 / DP1203**
  • *E1A11**
  • (125 VDC for shunt trip)*
  • Channels 2 and 4 of Logic S:*
  • *DP1202 / DP1204**
  • *E1B11**
  • (125 VDC for shunt trip)*

Rectifies 120VAC from DP1201 - DP1204 to 48 VDC and 15 VDC.

  • Note:*
  • DP1201 supplies Actuation Train A
  • DP1203 supplies Actuation Train B
  • DP1204 supplies Actuation Train C
36
Q
  • LOT 201.15 RCS Temperature Monitoring*
    • *

What parameters feed into OT∆T?

A

Tavg

∆T

Thermal Power

RCS Flow

PZR Pressure

  • *∆I**
  • Only used when ∆I exceeds +8%*

∆I and PZR Pressure NOT used for OP∆T.

37
Q
  • LOT 201.02 RCS*
    • *

What is Keff, RTP, and Tavg when the plant is in MODE 3?

A

Hot Standby:

  • Keff:*
  • *< 0.99**
  • RTP:*
  • *0%**
  • Tavg:*
  • *≥ 350 ˚F**
38
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

What drains into the PRT?

A
  • *RHR Pump Discharge Relief (3)**
  • *HHSI Pump Discharge Relief (3)**
  • *LHSI Pump Discharge Relief (3)**
  • *Safety Valves (3)**
  • *PORVs (2)**
  • *Seal #1 Return Relief (1)**
  • *CVCS Letdown Relief (CV-3100)**
  • *Head Vents**
39
Q
  • LOT 201.06 CVCS*
    • *

What will close the letdown orifice header isolation valve (FV-011)?

A
  • *CI ΦA**
  • *PZR Lvl - Low (17%)**
  • LT-0465 OR LT-0468*
  • *Loss of Air**
  • *Loss of MCC E1C1**
  • PZR Low Lvl on LT-0465 will close LCV-465 after 10 sec TD.
  • PZR Low Lvl on LT-0468 will close LCV-468 after 10 sec TD.
  • Note:*
  • To reopen FV-011:*
  • PZR LVL > 17% on LT-0465 AND LT-0468
  • LCV-465 AND LCV-468 open
  • CI ΦA signal not present
40
Q
  • LOT 201.20 SSPS*
    • *

Plant Conditions:

  • Rx Trip
  • One of the Rx trip breakers does not open (P-4 not met)

How would the operator stop SI equipment following an inadvertant SI actuation?

A
  • SI signal still active:*
  • *Pull to lock**
  • Set / Reset → Set is dominant so SI reset will NOT work*
  • SI signal clear:*
  • *Reset SI**
  • (CP001)*
  • *Reset sequencer**
  • (CP003)*
  • *Stop equipment**
  • Latch/ Reset → Reset is dominant so SI reset will work*

If SI signal comes back, SI equipment will restart if not in pull to lock.

41
Q
  • LOT 201.03 Rx Vessel & Internals*
    • *

How much RCS flow bypasses the fuel?

A

8.5% bypass flow

  • *Rx Vessel Head (2.5%)**
  • *Fuel Thimble Guides (4%)**
  • RCCAs (2%)*
  • Sources / Poisons (2%)*
  • *Between CL and HL nozzles (1%)**
  • *Between Baffle Wall and Core Barrel Wall (0.5%)**
  • *Between Baffle Wall and Fuel (0.5%)**
42
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

What is the maximum spray line ∆T allowed by the TRM?

A

621 ˚F

TRM 3.4.9.2 PZR Temperature Limits

Applicable: At all times

  • Note:*
  • By procedure limited to 320 ˚F*
43
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

When will the rupture discs on the PRT relieve pressure?

A

100 psig

Normally pressurized with 3 psig N2.

44
Q
  • LOT 201.03 Rx Vessel & Internals*
    • *

What are the neutron sources made of?

A
  • Primary Source:*
  • *Californium-252**
  • Used for initial S/U*
  • Secondary Source:*
  • *Antimony-Beryllium**
  • Used for subsequent S/Us*
  • Located in H-3 / H-13*

CF-252 burns itself up after 1st S/U.

Antimony-Beryllium regenerates itself.

45
Q
  • LOT 201.26 Vibration & Loose Parts Monitoring*
    • *

How many sensors are there in the vibration / loose parts monitoring system?

A

12 Sensors

Lower Reactor Vessel Head (2)

Upper Vessel Head (2)

S/Gs (2 per S/G)

  • Hot Leg Penetration
  • Intermediate Leg Penetration
46
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

What is the maximum amount of water that can be in the PZR in MODES 1-3?

A
  • *≤ 1816 ft3**
  • ≈ 100% PZR LVL*

LCO 3.4.3 PZR

Applicable in MODES 1-3

  • Note:*
  • Total PZR volume is 2100 ft3*
47
Q
  • LOT 201.25 IVMS*
    • *

What equipment is monitored by IVMS?

A
  • Trips Associated:*
  • *Main Turbine**
  • Thrust Collar Axial Displacement ± 40 mils [2/2]*
  • *S/G Feed Pumps**
  • TURBINE Thrust Collar Axial Displacement ± 20 mils [2/2]*
  • No Trips:*
  • *RCPs**
  • *CCPs**
  • *RHR Pumps**
  • *IVMS Cabinets**
  • Temperature*
  • Note:*
  • The axial displacement trip for the S/G feed pumps is for the turbine NOT the pump.*
48
Q
  • LOT 201.41 ESF Load Sequencer*
    • *

What is the MODE II sequence of starting loads?

A
  • 1 Sec:*
  • *480 V Buses**
  • 15 Sec:*
  • *RCFC (11/12)**
  • 20 Sec / 25 Sec:*
  • *CCW / ECW**
  • 30 Sec:*
  • *AFW**
  • 35 Sec:*
  • *CR / EAB HVAC (Emergency MODE)**
  • *Essential Chilled Water Pump**
  • *Standby Essential Chiller**
  • 240 Sec:*
  • *Running Essential Chiller(s)**
  • 280 Sec:*
  • *Sequence Complete**
  • Note:*
  • Can manually initiate with unlabeled shielded red pushbutton on CP003.*
49
Q
  • LOT 201.06 CVCS*
    • *

What are the flowrates of the CVCS letdown orifices?

A
  • *120 gpm - 150 gpm**
  • Normally in service*
  • *85 gpm - 100 gpm**
  • *25 gpm - 30 gpm**

Flowrate based on 2235 psig in RCS.

  • Note:*
  • FV-012 (120 gpm - 150 gpm) and FV-013 (85 gpm - 100 gpm) are air operated and fail close on loss of air.
  • FV-014 (25 gpm - 30 gpm) is a MOV.
50
Q
  • LOT 201.20 SSPS*
    • *

What Rx trips are defeated when the master relay defeat switch is in the “defeat/cvi available” or the “defeat all” positions?

A

SG Level - Low 2 (20%) [2/4 on 1/4]

  • *2 Urgent Alarms**
  • Alarms will still come in but no Rx Trip*
  • ≥ P-11 will trip the Rx (PZR Pressure ≥ 1985 psig) [2/3]
    • Prevents S/U with no ESF actuations
  • SR HV OFF disabled
    • Prevents loss of Source Range while S/D
  • ​Note:*
  • Must go through the Rx trip position to reach “defeat/cvi available” or “Defeat all” positions.
  • Must pull out switch to operate
51
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

What is the setpoint of the PZR PORVs?

A

2335 psig

  • PCV-655A: E1A11
  • PCV-656A: E1B11
  • Block valves are Class 1E 480V.

Both PZR PORVs AND Block valves required to be OPERABLE in MODES 1-3 (LCO 3.4.4)

  • Note:*
  • Relieves to PRT*
52
Q
  • LOT 201.41 ESF Load Sequencer*
    • *

What are the different modes of the ESF sequencers?

A
  • *MODE I: SI Signal**
  • ≥ 4 of 6 slave relays from ESF actuation cabinets giving SI signal*
  • *MODE II: LOOP**
  • UV on 4.16 kV bus [2/4]*
  • *MODE III: SI AND LOOP**
  • Conditions for MODE I and MODE II exist*
53
Q
  • LOT 201.04 PZR, PRT, & RCDT*
    • *

What drains into the suction of the RCDT pump?

A
  • *PRT**
  • *Cavity Drain**
  • *SI Accumulator Drains**
  • *RCS Loop Drains**

  • Note:*
  • RCDT Pump will auto stop on Flow - Low 2*
54
Q
  • LOT 201.06 CVCS*
    • *

What are the gal/% thumb rules for the VCT and PZR?

A
  • PZR:*
  • *68.3 gal/%**
  • VCT:*
  • *33.9 gal/%**

Used to calculate leak rate

55
Q
  • LOT 201.02 RCS*
    • *

What are the design parameters of the RCS?

  • Flowrate
  • RTP
  • Tavg
  • Pressure
A
  • Flowrate:*
  • *107,800 gpm / RCP**
  • RTP:*
  • *3853 MWt**
  • Tavg:*
  • *567 ˚F - 593 ˚F**
  • 0% - 100%*
  • Pressure:*
  • *2485 psig**
  • NOP: 2235 ± 15 psig*

Actual Tavg @ 100% is 592 ˚F

56
Q
  • LOT 201.06 CVCS*
    • *

At what pressure will the low pressure letdown relief valve (CV-3201) lift?

A

300 psig

Relieves to VCT.

57
Q
  • LOT 201.05 RCPs*
    • *

What is the flowrate and flowpath of the #3 Seal?

A
  • Flowrate:*
  • *800 cc/hr → 400 cc/hr (x2)**
  • Suction:*
  • *Seal Standpipe (RMW)**
  • Discharge:*
  • *CTMT Normal Sump (400 cc/hr)**
  • *RCDT (400 cc/hr)**
58
Q
  • LOT 201.20 SSPS*
    • *

What pressure transmitter does tech specs allow you to bypass rather than place in trip?

A
  • *Containment Pressure (PT-937)**
  • Used for Containment Spray*
  • Containment Pressure - High 3 (9.5#) [2/4]*

Changes coincidence for Containment Spray to [2/3] vice [1/3] if channel was placed in trip.

59
Q
  • LOT 201.20 SSPS*
    • *

What are the bases for the different regions of the Reactor Core Safety Limits - 4 Loops in Operation COLR graph (Tavg vs RTP)?

A

Flat Region (Green)

Ensures that no bulk boiling will occur at the core exit so that the OPΔT and OTΔT trips remain functional

Steep Region (Pink)

Assures that DNB does not occur (DNBR is maintained >1.52)

60
Q
  • LOT 201.02 RCS*
    • *

What are the piping penetrations off the intermediate legs?

A
  • Loop 1:*
  • *Drain to RCDT**
  • Loop 2:*
  • *Drain to RCDT**
  • Loop 3:*
  • *Drain to RCDT**
  • *CVCS Letdown**
  • Loop 4:*
  • *Drain to RCDT**
  • *CVCS Excess Letdown**

Loop drains go to suction of RCDT pumps. Do NOT go directly to RCDT.

  • Note:*
  • Flange leakoff goes directly to RCDT.*
61
Q
  • LOT 201.22 ESF*
    • *

What accident(s) is ESF designed to protect against?

A
  • *LOCA**
  • Double guillotine shear of cold leg*
  • *Rod Ejection**
  • Most reactive control rod*
  • *MSL Break**
  • Double ended shear of largest piping*

Fuel Handling Accident

Review (8 decks)

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