Providing Case Study Questions

DOE-STD-1058-93

...instructed to recheck all penetrations

...After

inserting

the

resilient

in their assigned areas.

polyurethane foam into the leak, the

inspector placed the candle about

Fire in the Cable Spreading Room

1 inch from the foam to check the

success of the repaired seal. The

Cable penetrations had been

airflow through the leak pulled the

sealed after initial installation but

candle flame into the resilient

additional cables were often added. To

polyurethane foam, which sizzled and

make an opening for additional cables,

began to burn. The inspector and the

holes were punched through the wall...

electrician attempted unsuccessfully to

put out the fire by breaking up....

...not already affected. Although the sug-

...instrumentation was lost. Unit 2

gestion to use water was made repeatedly

reactor was placed in shutdown cooling

by the local community fire chief, plant

about 11 hours after the fire started.

personnel were concerned about the ef-

Lessons Learned

fects of grounds and shorts on plant

operation and potential personnel hazards.

The inability to put out the fire

was caused, in part, by the large air

Community fire fighting personnel

flow through the penetration that

did not arrive at the scene until

prevented the carbon dioxide and dry

approximately 45 minutes after they were

chemicals from smothering the fire.

called. Part of the delay was the need

Compounding this were the fire...

to....

4.5 Providing Case Study Questions

The case study should include questions for the instructor to ask the trainees. These

questions can be written within the case study as the next example shows, or within the

lesson plan for other types of case studies. These questions should be based on the learning

objectives because they ask for the correct response to be observed. The instructional

developer should provide the instructor with correct or acceptable answers in an answer key

within the lesson plan.