FR-C and FR-I Daily Quiz

Question 1

What conditions must exist for the core to be considered adequately cooled?

Answer 1

Subcooling

Question 2

What are conditions of degraded core cooling?

Answer 2

CETC >757 F
or
RVLIS <46%
Degraded ECCS
50% Void Fraction

Question 3

What are condition of inadequate core cooling?

Answer 3

CETC >1200 F
or
757 F and RIVLIS NR <46% with no RCPs running and Subcooling <40 F

Question 4

What are the consequences of the loop seal clearing during a SBLOCA?

Answer 4

Mass loss rate out of the break

Question 5

Which fission product barrier is directly challenged by inadequate core cooling?

Answer 5

Fuel Clad

Question 6

How does the inventory status tree relate to the core cooling status tree?

Answer 6

Inventory concerns could leak to core cooling

Question 7

What are the two indications that would give a red path on core cooling?

Answer 7

CETC and RVLIS

Question 8

What indications for RVLIS are used under various conditions?
RCPS running or not running..

Answer 8

With RCPs running = Wide Range

RCPs not running = Upper Plenum for head voiding

Question 9

Four methods to restore core cooling in FR-C.1

Answer 9

Establish ECCS flow (most effective)
Depressurize SGs to lower RCS pressure
Start RCPs
Open all RCS vent paths to containment

Question 10

Why do we depressurize SGs in FR-C.1?

Answer 10

To allow accumulator and RHR pump injection

Question 11

What is the basis for checking RVLIS above 46% in FR-C.1?

Answer 11

Indicates core inventory is being recovered

Question 12

What is the basis for the 757 degree CETC for the core cooling status tree?

Answer 12

Indicates core exit is superheated

Question 13

If FR-C.1 is being implemented for >15 min what is the eplan call?

Answer 13

General Emergency

Question 14

What is the basis for checking RCS pressure <1725psig prior to raising pressure to condense a void in the vessel head?

Answer 14

To ensure its not a superheated (hard) bubble

Question 15

If all RCPs are running in FR-C.2 which RCP is stopped and why?

Answer 15

3 to be saved for later

Question 16

What are the potential consequences of tripping all RCPs while in FR-C.2?

Answer 16

Core Uncovery

Question 17

If FR-C.2 is being implemented with RCPs operating and RVLIS indicating >50% void fraction what is the EPlan call?

Answer 17

SAE

Question 18

If FR-C.2 is being implemented and NR RVLIS is <46% what is the EPlan call?

Answer 18

SAE

Question 19

If the first two methods of FR-C.1 are unsuccessful at restoring core cooling what action is taken next?

Answer 19

Start one RCP at a time until CETCs are <1200 F

Question 20

Should RCPs be started in FR-C.1 if SG depressurization was ineffective due to loss of heat sink?

Answer 20

No could have creep failure of SG tubes

Question 21

During SG depressurization in FR-C.1 RCPs are stopped after SGs reach 160psig. Why?

Answer 21

Loss of #1 Seal DP requirements

Question 22

Entry conditions to FR-I.1 High PRZ level

Answer 22

PRZ level >92%

Question 23

Entry conditions to FR-I.2 Low PRZ level

Answer 23

PRZ level < 17%

Question 24

Entry conditions to FR-I.3 voids in Rx Vessel

Answer 24

Upper Plenum <92%

RVLIS WR < value on the table

Question 25

Why do we check RCS pressure <1700# prior to raising RCS pressure in FR-I.3?

Answer 25

Check for a non superheated hard bubble

Question 26

Parameters used in FR-C CSFST?

Answer 26

Subcooling
CETC
RVLIS
RCP Status

Question 27

Who is in charge of all ILT scheduling?

Answer 27

Tim

Question 28

Who is the only ILT candidate to meet Davy Jones?

Answer 28

Andy