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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
* LOT 201.22 ESF* * * * What systems make up the ESF system?
* _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
* LOT 201.06 CVCS* * * * What will automatically close MOV-033A/B/C/D and, by doing so, isolate RCP seal injection?
* *CI ΦA ** * *_WITH_** * *Charging Header Pressure - Low (≤ 560 psig)** * Indicated on CP004 (PT-204)* ## Footnote * * * *Note: Holding switch on CP004 in "OPEN" position will override auto closure signal and allow valve to stay open.*
27
* LOT 201.02 RCS* * * * How many NR hot leg and NR cold leg temperature instruments are there in each loop of the RCS?
* *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
* LOT 201.06 CVCS* * * * At what pressure will the letdown relief valve (CV-3100) lift?
**600 psig** ## Footnote * * * Relieves to PRT.
29
* LOT 201.22 ESF* * * * What are the ESF support systems?
**ECW cooling pond** **ECW** **CCW** **ESF DG's**
30
* LOT 201.05 RCPs* * * * What is the pressure, flowrate, and flowpath of the #2 Seal?
* _Pressure:_* * *30 psig → 10 psig** * _Flowrate:_* * *3 gpm → 3 gph** * _Suction:_* * *Seal #1** * _Discharge:_* * *RCDT**
31
* LOT 201.02 RCS* * * * What is Keff, RTP, and Tavg when the plant is in MODE 5?
*_Cold Shutdown:_* * _Keff:_* * *\< 0.99** * _RTP:_* * *0%** * _Tavg:_* * *≤ 200 ˚F**
32
* LOT 201.04 PZR, PRT, & RCDT* * * * What is the setpoint the PZR Safety valves?
* *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
* LOT 201.20 SSPS* * * * What ESF actuations are _NOT_ defeated when the master relay defeat switch is in the "defeat/cvi available" position?
* *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
* LOT 201.04 PZR, PRT, & RCDT* * * * What drains directly into the RCDT?
* *RCP Seal #2 Leakoff** * *CVCS Valve Stem Leakoffs** * *Flange Leakoff** * *Excess Letdown** * Alternate Path*
35
* LOT 201.20 SSPS* * * * What supplies power to the Solid State Protection System (SSPS) logic cabinets?
* _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
* LOT 201.15 RCS Temperature Monitoring* * * * What parameters feed into OT∆T?
**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
* LOT 201.02 RCS* * * * What is Keff, RTP, and Tavg when the plant is in MODE 3?
*_Hot Standby:_* * _Keff:_* * *\< 0.99** * _RTP:_* * *0%** * _Tavg:_* * *≥ 350 ˚F**
38
* LOT 201.04 PZR, PRT, & RCDT* * * * What drains into the PRT?
* *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
* LOT 201.06 CVCS* * * * What will close the letdown orifice header isolation valve (FV-011)?
* *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
* 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?
* _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
* LOT 201.03 Rx Vessel & Internals* * * * How much RCS flow bypasses the fuel?
**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
* LOT 201.04 PZR, PRT, & RCDT* * * * What is the maximum spray line ∆T allowed by the TRM?
**621 ˚F** ## Footnote * * * TRM 3.4.9.2 PZR Temperature Limits Applicable: At all times * * * * Note:* * By procedure limited to 320 ˚F*
43
* LOT 201.04 PZR, PRT, & RCDT* * * * When will the rupture discs on the PRT relieve pressure?
**100 psig** ## Footnote * * * Normally pressurized with 3 psig N2.
44
* LOT 201.03 Rx Vessel & Internals* * * * What are the neutron sources made of?
* _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
* LOT 201.26 Vibration & Loose Parts Monitoring* * * * How many sensors are there in the vibration / loose parts monitoring system?
**12 Sensors** * * * Lower Reactor Vessel Head (2) Upper Vessel Head (2) S/Gs (2 per S/G) * Hot Leg Penetration * Intermediate Leg Penetration
46
* LOT 201.04 PZR, PRT, & RCDT* * * * What is the maximum amount of water that can be in the PZR in MODES 1-3?
* *≤ 1816 ft3** * ≈ 100% PZR LVL* ## Footnote * * * LCO 3.4.3 PZR Applicable in MODES 1-3 * * * * Note:* * Total PZR volume is 2100 ft3*
47
* LOT 201.25 IVMS* * * * What equipment is monitored by IVMS?
* _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
* LOT 201.41 ESF Load Sequencer* * * * What is the MODE II sequence of starting loads?
* _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
* LOT 201.06 CVCS* * * * What are the flowrates of the CVCS letdown orifices?
* *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
* 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?
**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
* LOT 201.04 PZR, PRT, & RCDT* * * * What is the setpoint of the PZR PORVs?
**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
* LOT 201.41 ESF Load Sequencer* * * * What are the different modes of the ESF sequencers?
* *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
* LOT 201.04 PZR, PRT, & RCDT* * * * What drains into the suction of the RCDT pump?
* *PRT** * *Cavity Drain** * *SI Accumulator Drains** * *RCS Loop Drains** ## Footnote * * * * Note:* * RCDT Pump will auto stop on Flow - Low 2*
54
* LOT 201.06 CVCS* * * * What are the gal/% thumb rules for the VCT and PZR?
* _PZR:_* * *68.3 gal/%** * _VCT:_* * *33.9 gal/%** * * * Used to calculate leak rate
55
* LOT 201.02 RCS* * * * What are the design parameters of the RCS? * Flowrate * RTP * Tavg * Pressure
* _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
* LOT 201.06 CVCS* * * * At what pressure will the low pressure letdown relief valve (CV-3201) lift?
**300 psig** ## Footnote * * * Relieves to VCT.
57
* LOT 201.05 RCPs* * * * What is the flowrate and flowpath of the #3 Seal?
* _Flowrate:_* * *800 cc/hr → 400 cc/hr (x2)** * _Suction:_* * *Seal Standpipe (RMW)** * _Discharge:_* * *CTMT Normal Sump (400 cc/hr)** * *RCDT (400 cc/hr)**
58
* LOT 201.20 SSPS* * * * What pressure transmitter does tech specs allow you to bypass rather than place in trip?
* *Containment Pressure (PT-937)** * Used for Containment Spray* * Containment Pressure - High 3 (9.5#) [2/4]* ## Footnote * * * Changes coincidence for Containment Spray to [2/3] vice [1/3] if channel was placed in trip.
59
* 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)?
*_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
* LOT 201.02 RCS* * * * What are the piping penetrations off the intermediate legs?
* _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
* LOT 201.22 ESF* * * * What accident(s) is ESF designed to protect against?
* *LOCA** * Double guillotine shear of cold leg* * *Rod Ejection** * Most reactive control rod* * *MSL Break** * Double ended shear of largest piping* **Fuel Handling Accident**

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