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
11D-3 Halogenated
hydrocarbons
accumulate in
WIPP Canister
head space and
welding
activity
produces
phosgene gas
(toxic) in the
Hot Cell
Chemical
reaction to
ultraviolet light
Potential onsite
exposure to toxic
gas.
Ventilation system dilutes;
Training and procedures;
Canister design;
WAC.
A-9) Verify
requirements about
allowable levels of
halogenated
hydrocarbons in the
drum.
A-10) Verify the
hazardous chemical
inventory in the
waste.
3,4 NA Ventilation flow
rate will dilute
the gas.
Requires further
Accident
Analysis
11F-1 Loaded WIPP
Canister
dropped in the
Hot Cell
Canister lid
failure;
Grapple failure;
Welding failure;
Human error;
Shear crane
cables
Potential for
breach of canister;
Potential for
breach of drums;
Potential for
facility damage;
Potential for
onsite/offsite
consequences;
Potential for
spread of
contamination;
Potential for
facility worker
exposure
Grapple design;
Preventive Maintenance
Program on crane;
Training and procedures
(welding);
Canister design;
Lid design;
Robotic welder design;
Shield door closed in the CUR;
Shield plug in Hot Cell is in
place.
NAI 4,4 Facility Worker -
1,4
Onsite Worker - 4,4
Offsite - 4,4
Radiological
Hazard Only
12. WIPP Canister Transfer to Shuttle Car in Transfer Cell
12D-1 Loaded WIPP
Canister
dropped in the
Hot Cell
Same as event
11F-1
NAI
C-53