DOE 2000. - Waste Isolation Pilot Plant - U.S. Department of Energy

WIPP RH PSAR DOE/WIPP-03-3174 APPENDIX C
Table 1- 72B HAZOP Table
Study Node
Event No.
Deviation Causes Consequences Existing Safeguards Actions or
Recommendations
Total Rank
(Cons.,Freq )
Radiological Rank
(Cons.,Freq)
Comments
8 - 6 Loss of brakes
on conveyance
while loaded
with facility
cask -
Conveyance
drops to bottom
of waste shaft
Equipment
Failure -Brake
system
Major damage to
shaft;
Potential breach
of container;
Potential for
major release of
radioactive
materials;
Potential for
significant
radiological
exposure to
personnel;
Potential for
considerable
impact offsite;
Potential worker
injury or fatality
Brake system design;
Hoist equipment inspection
program;
Pre-operational checks;
Preventive maintenance
program on hoist including
brake system
NAI 4,4 Facility Worker -
4,4
Onsite Worker - 4,4
Offsite - 4,4
Worker injury or
fatality could
result from the
industrial
accident
(dropped
conveyance with
cask).
Radiological
release would
likely be
extensive
8 - 7 Less than
desired stability
- Facility cask
transfer car not
latched to
conveyance
Human Error
Potential damage
to shaft and
conveyance;
Potential for
process downtime
Operator training; Operating
procedures;
Drive train requires power to
move - (gear driven)
NAI NA NA No release of
radioactive
material
9 - Facility cask transfer to disposal room
9 - 1 Incorrect
sequence -
Pivot rails not
lowered while
trying to move
Facility cask
transfer car
from
conveyance
Human Error
Potential for
minor damage to
transfer car and
conveyance;
Potential for
minor damage to
pivot rails
Operator Training;
Conveyance operating
procedures
NAI NA NA No release of
radiological
materials
C-18 January 23, 2003