...instructed to recheck all penetrations
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-
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...
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.