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 - 4 Excessive
movement -
Shuttle car
moves while
road cask is
being lowered
into shuttle car
Human Error;
Equipment
Failure;
Control loop
failure
Potential
equipment
damage;
Potential for
processing delays
Operator training related to
transfer operations;
Periodic functional checks of
control loop;
Shuttle car/crane interlock;
Road cask design - Meets
DOT Type B shipping
container certification
requirements
R-7 Evaluate this
scenario and
consider potential
need for other
engineering
safeguards
NA
NA
5 - 5 Lack of
attention -
Individual falls
through road
cask unloading
room floor port
Human Error
Potential for
worker injury or
fatality.
Transfer procedures;
Operator training/qualification
program
R-8 Install restraint
at floor valve
opening
4,4 NA Worker injury or
fatality could
result from the
industrial
accident.
5 - 6 Floor valve
closes too soon
(Sooner than
required time)
Equipment
Failure
Control Loop
Failure-PLC
(Programmable
Logic Control)
Potential damage
to cask;
Potential damage
to crane ropes;
Potential damage
to floor valve
Hoist interlock;
Cask Design;
Periodic functional checks of
control system
NAI NA NA No release of
radioactive
material
C-10 January 23, 2003