Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

LOIT GOP JH 2018 > SPTA's > Flashcards

SPTA's Flashcards

1
Q

What are the ENTRY conditions for SPTA’s per Section 1.0 of 40EP-9EO01 (RX Trip)?

A 
REAC TRIP (CEDMCS BUS UNDV) alarming (4A07A)
CEA rod bottom lights on
Rapid drop in RX Power
RX Trip circuit breakers open
RPS trip setpoints exceeded
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When checking Reactor Power is Dropping, if the RX isn’t tripped, what action is performed?

A

OPEN BOTH -

NGN-L03 and L10 supply breakers (B01)

THEN direct an Operator to open the RX trip breakers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What must be checked when a DG is running to support PBA/PBB loads?

A

Spray Pond Pump is running

IF NOT, direct Operator to emergency stop the DG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the RCS Inventory acceptance criteria?

A

PZR Level 10%-65% (trending to 33%-53%)
Check RCS is 24F or more subcooled
Check that both Seal Injection and NC is in-service to all RCP’s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

If RCS is < 24F subcooled, what is done?

A

STOP all RCP’s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the RCS Pressure Control acceptance criteria?

A

PZR Pressure 1837-2285 psia

PZR Pressure trending toward 2225-2275 psia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the Core Heat Removal acceptance criteria?

A

At least 1 RCP operating
Loop Delta T is < 10F
RCS is 24F or more subcooled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do we determine RCS Heat Removal acceptance criteria?

A

a)At least 1 SG meets BOTH of the following:
Level is 35% WR or more
FW is restoring or maintaining level 45-60% NR

b) Check Tc 560-570F
c) Check SG Pressure 1140-1200 psia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do we determine CTMT isolation acceptance criteria?

A

Check CTMT pressure is less than 2.5 psig
Check BOTH:
- No valid CTMT area rad monitor alarms
- No valid steam plant activity monitor alarms

NOTE: If CTMT pressure is 3 psig or more, then ensure a CIAS is initiated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do we determine the CTMT Temp and Pressure Control acceptance criteria are met?

A

a. CTMT temp < 117F

b. CTMT Pressure < 2.5 PSIG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

If CTMT pressure is > 8.5 PSIG, what must be performed?

A

a. Ensure CSAS is actuated
b. >4350 GPM flow from a CS Header
c. Stop all operating RCP’s
d. Isolate RCP CBO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the Safety Functions (8)?

A

a. Reactivity Control
b. Maintenance of Vital Auxiliaries
c. RCS Inventory Control
d. RCS Pressure Control
e. Core Heat Removal
f. RCS Heat Removal
g. CTMT Isolation
h. CTMT Temp and Pressure Control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

If 1 or more safety functions didn’t meet acceptance criteria, what does the CRS use?

A

Diagnostic Actions, to determine implementing procedure (ORP or FRP)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is required before taking contingency actions?

A

CRS Concurrence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

If a full-strength CEA doesn’t insert, what is performed?

A

Standard Appendix 103, RCS Makeup/Emergency Boration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

During a ‘typical trip’ what should RX Power do?

A

Immediate drop to ~ 7%
Continue decrease at slower rate, final rate of -1/3 DPM SUR
Neutron power stop decrease in source range

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Several minutes after a RX trip, what is SUR doing?

A

Indication has large fluctuations due to low input signal and circuit noise (may not be useful)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is checked for CEA position post trip?

A 
At least 2 of available indicators:
CEDM Control Panel LEL's
CEAPDS
Core Mimic Rod Bottom Lights
CEAC 1&amp;2 RSPT positions

In doubt, BORATE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How long do we Borate during EOP’s?

A

Until SDM calculation performed (or ORP directs)

At least 1 Charging Pp hard started

20
Q

During EOP, how fast are we required to initiate a Boration flowpath?

A

< 15 minutes (30 if using V164) - TS 3.1.2 (Time Critical)

21
Q

If L03/L10 need to be opened to de-energize the CEDM MG set power to RTSG’s, how long do we wait to restore power to L03/L10?

A

5 seconds

22
Q

Why are the generator output breakers opened AFTER tripping the turbine if manually done?

A

To prevent turbine overspeed

23
Q

If Main Generator output breakers are opened TOO QUICKLY, what could occur?

A

Fast Bus XFER of S01 and S02 can be blocked

24
Q

If a HIGH PRIORITY trip alarm is present on a DG, does EOP allow a manual start attempt?

A

Guidance is to NOT attempt a start

25
Q

U1 is being started up. Power is at 5% when a RX TRIP occurs. What is done with Main Generator output breakers?

A

Leave closed since MOD is open

26
Q

Why 10-65% PZR Level Operational Limit in SPTA’s?

A

10% - Ensures operability (lowest lvl of fluid)

65% - Space for Spray (and surge space)

27
Q

Do we isolate Seal Bleed-Off to an idle RCP?

A

NO, RCP CBO would rise to RCS pressure across entire 3 seal set of that RCP

28
Q

When do we NOT stop the last Charging Pump during SPTA’s and 40DP-9AP06?

A

When we need Aux Spray

29
Q

On a loss of RCP Cooling and Seal Injection, what are the consequences of NOT isolating CBO?

A

If CBO isn’t isolated - may affect seal integrity (excess RCS leakage)

30
Q

In Hot Standby, how long will RCP seals last on Loss of RCP Cooling and Seal Injection?

A

20 minutes

31
Q

On a RX Trip, why is PZR Pressure band set at 1837-2285 PSIA)?

A

Adequate subcooling and No Primary Safety Valves Lift

32
Q

Why are RCP’s in T2/L2 configuration after SIAS?

A

Maintain controlled depressurization

33
Q

SG1 has 2 RCP’s running post-trip. SG2 has only 1 RCP running. What should be expected?

A

SG1 transfers more heat
SG1 Pressure is HIGHER and Steams more
SG1 Level DROPS faster with equal feed flow

34
Q

How is ADEQUATE RCS HEAT REMOVAL maintained?

A

At least 1 SG available for removing Heat

35
Q

Why is SG Level band 45-60%NR after RX Trip?

A

45% ensures SG Tubes are covered

60% prevents overfilling of SG (water in SG piping)

36
Q

Post Trip, what is preferred source of FW to a SG?

A

NBA

AFN, AFB then AFA

37
Q

FWCS in RTO with Natural Circulation equals?

A

TAVG goes UP as Tc is maintained
Th RISES

RTO Feed at higher rate, Tc LOWERS

38
Q

Why is Tc kept 560-570F post trip?

A

1140-1200 PSIA (roughly), ensures FW and SBCS operate and no uncontrolled cooldown, also stays below lifting MSSV’s

39
Q

If starting AFA manually, what is done before starting the pump?

A

Ensure both steam admission valves are CLOSED

RESETS the speed control circuit

40
Q

What is the preferred method to cool the RCS while performing SPTA’s?

A

MINIMIZE steaming, MAXIMIZE feeding

Minimizes potential offsite dose until SGTR is ruled out

41
Q

How do we verify that a MSIS actuated?

A

ESFAS Signal initiated

MSIV, MFIV and BD IV’s are CLOSED

42
Q

During an ESD, when faulted SG dries out (RCS Temps RISING), lowest Tc is noted and what is determined?

A

Saturation Pressure for Temps from Steam Tables (Adjust ADV’s on intact SG’s, open to target pressure), stabilizes Tc

43
Q

Why are we worried about REBOUND if MSIS has actuated?

A

If Tc not stabilized = a large insurge of COLD WATER to the PZR could occur (delta T) - rapid pressure drop

44
Q

How do we address CTMT Isolation criteria?

A

CTMT Pressure <2.5# (if above 3#, CIAS initiate)

No valid CTMT Rad ARM or steam activity

45
Q

If we lose CR RMS during SPTA’s, what is used?

A

Available in CR (if inadequate, diagnose from available and pre-trip indications)

LOIT GOP JH 2018 (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions