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
20-5 Cold Weather
Natural
Ventilation
Pressure results
in changes to
air balance
(Underground
ventilation
system)
Cold weather
caused Natural
Ventilation
Pressure (NVP)
Potential to
disrupt waste
handling
operations;
Potential to, in the
event of an
accident involving
release of
radiological
material, spread
airborne
contamination to
the environment;
Potential to cause
deterioration of
braking and
electronic systems
for the waste shaft
hoist during
prolonged
exposure to salt;
Potential for waste
shaft hoist to fail;
Potential for
worker injury
Operator training and
qualification;
Waste shaft hoist system
design;
Operating procedures;
Air balance and flow tests;
Shaft pressure monitoring;
Alarms to indicate adverse air
pressure conditions;
WIPP ventilation simulator
used for guidance;
Underground ventilation
remote monitoring control
system (monitors air flows and
d/p’s and enable CMR operator
to adjust vortex to control
flow)
Mine weather stations to
monitor natural ventilation
pressure(temp, relative
humidity and barometric
pressure);
Isolation of mine splits;
Backup power available to
operate fans for flow through
the panel area
NAI 3,4 NA There would be
no radiological
hazard as the
result of the cold
weather NVP
event unless
there was
already
contamination
present in the
mine. Injury to
worker related to
industrial mining
safety.
C-60