IOI-4 Scram Recovery

Question 1

State the purpose of IOI-4 Scram Recovery

Answer 1

provide directions for plant recovery following Reactor Scram.

(assumes that actions of Reactor Scram ONEP and EP 2 have been completed before entry into IOI-4)

Question 2

Following a reactor scram, determine the conditions required to allow entry into IOI-4. Considering the following parameters:

RPV pressure?

Answer 2

<1064.7#

Question 3

Following a reactor scram, determine the conditions required to allow entry into IOI-4. Considering the following parameters:

RPV water level?

Answer 3

+11.4” to 53.5”

Question 4

Following a reactor scram, determine the conditions required to allow entry into IOI-4. Considering
the following parameters:

suppression pool temp?

Answer 4

<95F

Question 5

Following a reactor scram, determine the conditions required to allow entry into IOI-4. Considering the following parameters:

Suppression Pool water level?

Answer 5

> =18.34’ and <=18.81’

Question 6

Following a reactor scram, determine the conditions required to allow entry into IOI-4. Considering the following parameters:

Drywell pressure?

Answer 6

<1.23#

Question 7

Following a reactor scram, determine the conditions required to allow entry into IOI-4. Considering the following parameters:

Drywell temperature?

Answer 7

<135F

Question 8

Following a reactor scram, determine the conditions required to allow entry into IOI-4. Considering the following parameters:

Containment temperature?

Answer 8

<95F

Question 9

indicate methods available for maintaining RPV pressure and level with MSIVs open

Answer 9

Bypass valves and drains for pressure

Feedwater for level

Question 10

Indicate methods available for maintaining RPV pressure and level with MSIVs closed.

Answer 10

RCIC or SRVs for pressure

RCIC and RWCU blowdown for level

Question 11

State the least desirable means to control reactor pressure and why

Answer 11

SRVs are the least desirable for pressure because it adds heat to the suppression pool