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DOE 2000. - Waste Isolation Pilot Plant - U.S. Department of Energy

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WIPP RH PSAR <strong>DOE</strong>/WIPP-03-3174 CHAPTER 5<br />

Table 5.1-10 HAZOP Accident Scenario Ranking Page 7 <strong>of</strong> 13<br />

Accident Scenario # Node Deviation Consequence Qualitative<br />

Consequence<br />

Ranking<br />

(Table 5.1-6)<br />

Qualitative<br />

Frequency<br />

Ranking<br />

(Table 5.1-4)<br />

Prevention/Mitigation<br />

NC3-A<br />

LOC in the<br />

WHB<br />

5CE-2<br />

Unload the<br />

cask in the<br />

CUR<br />

Drum carriage<br />

dropped inside<br />

the Hot Cell<br />

onto stored<br />

waste<br />

Potential for<br />

significant<br />

radioactive<br />

materials<br />

release<br />

4 4 Prevention: PM Program on crane;<br />

Crane design; Fixture design; Drum<br />

carriage design.<br />

Mitigation: Procedures and Training;<br />

Ventilation system; Emergency<br />

response procedure.<br />

NC3-A<br />

LOC in the<br />

WHB<br />

9-5 Move<br />

empty<br />

facility<br />

canister into<br />

Hot Cell<br />

and Prepare<br />

facility<br />

canister<br />

Shield plug<br />

lift fixture<br />

falls over in<br />

the Hot Cell<br />

Potential for<br />

significant<br />

radioactive<br />

materials<br />

release<br />

4 4 Prevention: Hot Cell leaded glass (outer<br />

layer).<br />

Mitigation: Procedures and Training;<br />

Ventilation system.<br />

NC3-A<br />

LOC in the<br />

WHB<br />

9AC-1<br />

Move<br />

empty<br />

facility<br />

canister into<br />

Hot Cell<br />

and Prepare<br />

facility<br />

canister<br />

Empty facility<br />

canister<br />

dropped onto<br />

stored waste<br />

in Hot Cell<br />

Potential for<br />

significant<br />

radioactive<br />

materials<br />

release<br />

4 4 Prevention: PM Program on crane;<br />

Crane/grapple design; Facility design.<br />

Mitigation: Procedures and Training;<br />

Ventilation system; CAMs; Emergency<br />

response procedure; Weight <strong>of</strong> Empty<br />

canister; Shield door crane interlock;<br />

Shield plug in Hot Cell is in place.<br />

NC3-B<br />

LOC in the<br />

WHB<br />

4G-1<br />

Remove<br />

cask lid<br />

from cask in<br />

CUR<br />

Cask lid<br />

dropped onto<br />

the cask and<br />

drums in CUR<br />

Potential for<br />

significant<br />

radioactive<br />

materials<br />

release<br />

4 4 Prevention: PM Program on crane;<br />

Crane design; Facility design.<br />

Mitigation: Procedures and Training;<br />

Ventilation system; CAMs; Emergency<br />

response procedure; Shield door crane<br />

interlock.<br />

5.1-41 January 22, 2003

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