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
5 -Road cask transfer to shuttle car
5 - 1 Road cask
dropped in the
cask unloading
room
Human Error;
Equipment
Failure - Crane
Potential for
production
downtime;
Potential for
equipment
damage; Potential
for worker injury
or fatality
Cask/canister design;
Operator training;
Waste handling procedures;
Room design limits height of
lift
R-6 Evaluate the
HVAC (Heating,
Ventilation, and Air
Conditioning) DP’s
(Differential
Pressures) with
road cask
unloading room
door open.
4,4 NA Worker injury or
fatality could
result from the
industrial
accident.
A-5 Verify that
operating
procedures exclude
personnel from
room during cask
transfer for worker
protection
5 - 2 Road cask
dropped into
transfer cell
through the
floor port
Human Error;
Equipment
Failure
(mechanical);
Control Loop
Failure-PLC
(Programmable
Logic Control)
Potential for
production
downtime;
Potential for
equipment
damage;
Potential for
worker injury or
fatality.
Cask/canister design;
Operator training;
Waste handling and transfer
cell procedures (entry
restrictions);
Interlocks involving floor
valve, shuttle car, crane
(protects against worker error);
Impact limiter on canister;
Shuttle car design
R-6 Same
Recommendation
as for 5-1:
Evaluate the HVAC
DP’s with road
cask unloading
room door open.
4,4 NA Worker injury or
fatality could
result from the
industrial
accident.
5 - 3 Equipment
performs in
other than
desired mode -
Shield valve
interlocks fail
such that both
shield valves
can be open at
the same time
Equipment
Failure;
Control Loop
Failure-PLC
(Programmable
Logic Control)
Potential for air
flow reversal
(minimal)
Periodic functional checks of
control loop
NAI NA NA
C-9 January 23, 2003