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
6 - 5 Incorrect
position of
shield valves (
valves close
sooner than
desired)
Equipment
Failure;
Control Loop
Failure-PLC
(Programmable
Logic
Controller)
Potential damage
to cask;
Potential damage
to crane ropes;
Potential damage
to floor valve;
Hoist interlock;
Cask design
NAI NA NA No release of
radioactive
material
7 - Load canister into facility cask
7 - 1 Excessive
movement -
Shuttle moves
while crane is
lifting canister
Mechanical
Failure;
Control Loop
Failure
Potential for
damage to shuttle;
Potential breach
of the canister;
Potential spread of
contamination;
Potential for direct
radiological
exposure to
personnel;
Potential for
worker injury or
fatality.
Grapple hoist interlock;
Limited access into Transfer
Cell;
Pre-operational checks;
Preventive Maintenance
Program for shuttle and
control equipment;
Waste handling procedures;
RH area ventilation system -
HEPA (High Efficiency
Particulate Air) filtration
R-11 Review
canister and shuttle
car designs and
control loop design
to ensure potential
for inadvertent
movement is
addressed
4,4 Facility Worker -
4,4
Onsite Worker - 4,4
Offsite - 4,4
Worker injury or
fatality could
result from the
industrial
accident.
Potential for
radiological
impact to
facility, and to
receptors onsite
including in
facility and
offsite.
7 - 2 Canister is
dropped while
being lifted
into facility
cask; canister
falls back into
road cask or
onto transfer
room floor
Human Error;
Equipment
Failure - Crane,
grapple;
Control Loop
Failure;
Potential breach
of canister;
Potential spread of
contamination;
Potential for
significant
damage to facility;
Potential for
considerable
consequences to
offsite
individuals;
Potential for
significant process
downtime for
recovery;
Potential for
worker injury or
fatality.
HEPA filtration;
Waste handling and crane
operation procedures;
Operator training;
Weight interlock on grapple;
Shielding for workers; Impact
limiter on canister;
Pre-operational checks for
crane and control equipment;
Preventive Maintenance
Program for crane equipment
and control equipment;
Limited access into transfer
cell
4,4 Facility Worker -
4,4
Onsite Worker - 4,4
Offsite - 4,4
Worker injury or
fatality could
result from the
industrial
accident.
Potential for
radiological
impact to offsite
C-12 January 23, 2003