Brainscape's Knowledge GenomeTM

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


See full index

T Specs > Section 3.8 Electrical Power Systems > Flashcards

Section 3.8 Electrical Power Systems Flashcards

1
Q

What is T.S. 3.8.4 DC Sources - Operating?

A

3.8.4 DC Sources - Operating

The Left Train and Right Train DC electrical power sources shall be OPERABLE.

Modes 1 -4

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

What is a DC Source?

A

DC Source

  • 1 battery
  • 1 directly connected battery charger
  • corresponding control equipment and interconnecting cabling
  • supplying power to the associated bus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What makes a DC Source Operable?

A

DC Source Operable

An OPERABLE DC electrical power source requires its battery to be
OPERABLE and connected to the associated DC bus.

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

When and why do you connect Two Chargers to the same battery?

A

Two Chargers

T.S. 3.8.4 One required DC electrical power source battery inoperable.

Verify OPERABLE directly connected and functional cross-connected battery chargers are connected supplying power to the affected DC train.

Placing the second battery charger in service provides two benefits:
1) restoration of the capacity to supply a sudden DC power demand,
and 2) restoration of adequate DC power in the affected train as soon
as either AC power distribution system is re-energized following a loss
of offsite power.

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

What is T.S. 3.8.5 DC Sources - Shutdown?

A

T.S. 3.8.5 DC Sources - Shutdown

DC electrical power source(s) shall be OPERABLE to support the DC electrical power distribution subsystem(s) required by LCO 3.8.10, “Distribution Systems—Shutdown.”

MODES 5 and 6,
During movement of irradiated fuel assemblies.

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

What do you do if one or more required DC electrical power sources inoperable?

A

One or more required DC electrical power sources inoperable.

Immediately declare affected required feature(s) inoperable.

or

Immediately

Suspend CORE ALTERATIONS,

AND

Suspend movement of irradiated fuel assemblies,

AND

Initiate action to suspend operations involving positive reactivity additions,

AND

Initiate action to restore required DC electrical power source(s) to OPERABLE status.

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

Why are two DC sources required operable during Modes 5 & 6?

A

3.8.5 DC Sources - Shutdown

Two DC sources are required to ensure availability of an uninterruptable
power source for the instrumentation and controls for the Reactor
Protective System (RPS).
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is T.S. 3.8.1 AC Sources - Operating?

A

3.8.1 AC Sources - Operating

The following AC electrical sources shall be OPERABLE:

  • Two qualified circuits between the offsite transmission network and the onsite Class 1E AC Electrical Power Distribution System;

and

  • Two Diesel Generators (DGs) each capable of supplying one train of the onsite Class 1E AC Electrical Power Distribution System.

MODES 1, 2, 3, and 4.

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

What do do if one offsite circuit inoperable?

A

3.8.1 AC Sources - Operating

One offsite circuit inoperable.

Perform offsite source check within 1 hour and then 1 per 8 hours.

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

What do you do if one DG inoperable?

A

3.8.1 AC Sources - Operating

Offsite source check within 1 hour and every 8 hours thereafter.

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

What do you do if three or more AC sources inoperable?

A

T.S. 3.8.1 AC Sources Operating

Enter LCO 3.0.3. immediately

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

How long does an EDG Day Tank last?

A

EDG Day Tank

13.5 hours

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

What FSAR mechanism initiates a loss of off-site power with the plant off-line? On-line?

A

FSAR Accident

Offline?

  • No specific mechanism for initiating a loss of off-site power when the plant is not on the line is discussed in the FSAR.

Online?

  • The loss of off-site power via a perturbation of the transmission grid because of the loss of the plant’s generating capacity.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Those analyses which assume that a loss of off-site power and failure of a
single DG accompany the accident assume what for a time to re-power the bus?

A

EDG Start and Load

11 seconds from the loss of power until the bus is re-energized. This time includes time for all portions of the circuitry necessary for detecting the undervoltage (relays
and auxiliary relays) and starting the DG. Included in the 11 seconds, the analyses also assume 10 seconds for the DG to start and connect to the bus, and additional time for the sequencer to start each safeguards load.

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

What is a mode 5 or 6 initiating event for Loss of SD Cooling?

A

Loss of SD Cooling Initiating Event

Loss of Offsight Power

LPSI pumps are not sequenced on via NSD Sequencer. SIAS would be defeated in Mode 5 and 6.

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

What are the Qualified Offsite Circuts?

A

Qualified Offsite Circuts

Safeguards Transformer 1-1 and Startup Transformer 1-2.

Station Power Transformer 1-2 is not qualified as a required source for LCO 3.8.1 since it is not independent of the other two offsite circuits.

17
Q

What EDG voltage and frequency are requried for operability?

A

EDG voltage and frequency

  • 2280 to 2250 v (95% to 105% rated)
  • 59.5 Hz and 61.2 Hz
18
Q

What is T.S. 3.8.2 AC Sources - Shutdown?

A

3.8.2 AC Sources - Shutdown

The following AC electrical power sources shall be OPERABLE:

  • One qualified circuit between the offsite transmission network and the onsite Class 1E AC electrical power distribution subsystem(s) required by LCO 3.8.10, “Distribution Systems - Shutdown”; and
  • One Diesel Generator (DG) capable of supplying one train of the onsite Class 1E AC electrical power distribution subsystem(s) required by LCO 3.8.10.

MODES 5 and 6,
During movement of irradiated fuel assemblies.

19
Q

What do you do on a loss of either offsite power source or an EDG per T.S. 3.8.2 AC Sources - Shutdown?

A

Loss of either offsite power source or EDG

IMMEDIATELY

Declare affected required feature(s) with no offsite power available inoperable.

OR

Suspend CORE ALTERATIONS.

AND

Suspend movement of irradiated fuel assemblies.

AND

Initiate action to suspend operations involving positive reactivity additions.

AND

Initiate action to restore required offsite power circuit/EDG to OPERABLE status.

20
Q

Why is assuming a single failure and concurrent loss of all offsite or all onsite power is not required for T.S. 3.8.2 AC Sources - shutdown?

A

AC Sources Shutdown T.S. 3.8.2

The rationale for this is based on the fact that many Design
Basis Accidents (DBAs) that are analyzed above MODE 5 have no
specific analyses in MODES 5 and 6. Worst case bounding events are
deemed not credible in MODES 5 and 6 because the primary coolant
temperature and pressure, and the corresponding stresses result in the
probabilities of occurrence being significantly reduced, and in minimal
consequences.

21
Q

Is SP Transformer 1-2 a qualified offsite source for T.S. 3.8.2 AC Sources - Shutdown?

A

T.S. 3.8.2 AC Sources - Shutdown

Since only one offsite AC source is required, independence is not a criterion.

Any of the three offsite supplies, Safeguards Transformer 1-1, Station Power Transformer 1-2, or Startup Transformer 1-2 is acceptable as a qualified circuit.

22
Q

What is T.S. 3.8.3 Diesel Fuel, Lube Oil, and Starting Air?

A

3.8.3 Diesel Fuel, Lube Oil, and Starting Air

For each Diesel Generator (DG):

  • The stored diesel fuel oil, lube oil, and starting air subsystem shall be within limits, and
  • Both diesel fuel oil transfer systems shall be OPERABLE.

APPLICABILITY: When associated DG is required to be OPERABLE.

23
Q

T.S. 3.8.3 Diesel Fuel, Lube Oil, and Starting Air requires how much fuel oil to consider the EDG’s operable?

A

T.S. 3.8.3 Diesel Fuel, Lube Oil, and Starting Air

If Fuel oil inventory less than a 7 day supply and greater than a 6 day supply, then you have 48 hours to restore inventory to within limits.

Less than a six day supply and both EDG’s are inoperable.

28,592 gallons is required for six days.

33,054 gallons is required for seven days.

24
Q

T.S. 3.8.3 Diesel Fuel, Lube Oil, and Starting Air requires how much lube oil for EDG operability?

A

3.8.3 Diesel Fuel, Lube Oil, and Starting Air

If Stored lube oil inventory less than a 7 day supply and greater than a 6 day supply, then you have 48 hours to restore the inventory.

If less than a 6 day supply, both EDGs are inoperable.

A six day supply is 268 gallons

A seven day supply is 313 gallons

25
Q

T.S. 3.8.3 Diesel Fuel, Lube Oil, and Starting Air, only allows P-18A to be inoperable for 12 hours. Why?

A

3.8.3 Diesel Fuel, Lube Oil, and Starting Air

P-18A can be powered by EDG 1-2, EDG 1-1 or off-site power.

P-18B can be powered only by EDG 1-1.

If P-18A is OOS and EDG 1-1 failed to start on loss of offsite power. EDG 1-2 would run out of fuel and has therefore lost its independence.

26
Q

What is a majore source of Fuel Contamination?

A

Fuel Contamination

Microbiological fouling is a major cause of fuel oil degradation. There
are numerous bacteria that can grow in fuel oil and cause fouling, but all
must have a water environment in order to survive.

27
Q

What is T.S. 3.8.6 Battery Cell Parameters?

A

3.8.6 Battery Cell Parameters

Battery cell parameters for the Left Train and Right Train batteries shall be within limits.

When associated DC electrical power source(s) are required to be OPERABLE.

28
Q

What do you do within 1 hour when one or more batteries with one or more battery cell parameters not within Category A or B limits per T.S. 3.8.6 Battery Cell Parameters?

A

3.8.6 Battery Cell Parameters

Within 1 hour verify pilot cells electrolyte level and float voltage meet

  • Electrolyte Level - Above top of plates, and not overflowing
  • Float Voltage - > 2.07 V
29
Q

What are the Category A parameters per T.S. 3.8.6 Batter Cell Parameters?

A

Cat A Parameters

Electrolyte Level

  • > Minimum level indication mark, and ≤ ¼ inch above maximum level indication mark

Float Voltage

  • ≥ 2.13 V

Specific Gravity

  • ≥ 1.205
30
Q

What are the Category B parameters per T.S. 3.8.6 Batter Cell Parameters?

A

Cat B Parameters

Electrolyte Level

  • > Minimum level indication mark, and ≤ ¼ inch above maximum level indication mark

Float Voltage

  • ≥ 2.13 V

Specific Gravity

  • ≥ 1.200
    AND
    Average of connected cells ≥ 1.205
31
Q

What makes a Battery Inoperable per T.S. 3.8.6 Battery Cell Parameters?

A

Battery Inoperable per T.S. 3.8.6 Battery Cell Parameters

  • Failure within 1 hour to verify pilot cells electrolyte level and float voltage meet Table 3.8.6-1 Category C limits.
  • One or more batteries with average electrolyte temperature of the representative cells < 70°F.
  • One or more batteries with one or more battery cell parameters not within Category C limits.
32
Q

What is T.S. 3.8.7 Inverters - Operating?

A

3.8.7 Inverters - Operating

Four inverters shall be OPERABLE.

MODES 1, 2, 3, and 4.

33
Q

When and why must Inverters be operable?

A

Inverters Operable

An inverter is considered inoperable if it is not powering the associated Preferred AC bus, or if its output voltage or frequency is not within tolerances.

Maintaining the inverters OPERABLE ensures that the redundancy incorporated into the RPS and ESF instrumentation and controls is maintained.

34
Q

What is T.S. 3.8.8 Inverters - Shutdown

A

3.8.8 Inverters - Shutdown

Inverter(s) shall be OPERABLE to support the onsite Class 1E Preferred AC bus electrical power distribution subsystem(s) required by LCO 3.8.10, “Distribution Systems—Shutdown.”

MODES 5 and 6,
During movement of irradiated fuel assemblies.

35
Q

What do you do if one or more required inverters are inoperable per T.S. 3.8.8 Inverters - Shutdown?

A

3.8.8 Inverters - Shutdown

One or more required inverters inoperable

IMMEDIATELY

Declare affected required feature(s) inoperable.

OR

Suspend CORE ALTERATIONS.

AND

Suspend movement of irradiated fuel assemblies.

AND

Initiate action to suspend operations involving positive reactivity additions.

AND

Initiate action to restore required inverters to OPERABLE status.

36
Q

What is T.S. 3.8.9 Distribution Systems - Operating?

A

3.8.9 Distribution Systems - Operating

Left Train and Right Train AC, DC, and Preferred AC bus electrical power distribution subsystems shall be OPERABLE.

MODES 1, 2, 3, and 4.

37
Q

What do you do if two or more inoperable distribution subsystems that result in a loss of function per T.S. 3.8.9 Distribution Systems - Operating?

A

Inoperable Distribution

Immediately Enter LCO 3.0.3

T Specs (22 decks)

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