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

WIPP RH PSAR DOE/WIPP-03-3174 APPENDIX C
Table 2- 10-160B HAZOP Table
Study Node
Event No.
Deviation Causes Consequences Existing Safeguards Actions Total Rank
(Cons., Freq)
Radiological Rank
(Cons.,Freq)
Comments
11. Prepare WIPP Canister for Disposal
11D-1 Fire in the Hot
Cell
Heat generated
by welding
causes ignition
of combustibles
inside canister
Potential for
onsite/offsite
consequences;
Potential for
spread of
contamination;
Potential for
facility damage;
Potential for
equipment
damage.
Robotic welder design;
WAC (no flammable material);
(i.e.: two mechanical failures
to cause accident);
Storage limits on waste (LFL);
Lid design;
WIPP Canister design;
Training and procedures;
Ventilation;
Fire Loading/ Combustible
Control Program;
Thermal detector;
Shield door closed in the CUR;
Shield plug in Hot Cell is in
place.
NAI 4,4 Facility Worker -
2,4
Onsite Worker - 4,4
Offsite - 4,4
Radiological
Hazard Only
11D-2 Explosion in
the Hot Cell
Ignition of
flammable gases
in canister head
space during
welding
activities
Potential for drum
breach;
Potential for
damage to Hot
Cell; Potential for
loss of shielding
to facility worker;
Potential for
onsite/offsite
consequences;
Potential for
worker fatality;
Potential for
spread of
contamination.
Limited storage time in the Hot
Cell; Training and Procedures;
Canister lid design; Preventive
Maintenance Program on
welder; WAC (no flammable
material); Vented drums and
canister; Ventilation;
Shield door closed in the CUR;
Shield plug in Hot Cell is in
place.
NAI 4,4 Facility Worker -
4,4
Onsite Worker - 4,4
Offsite - 4,4
C-52