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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 10 <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-F<br />

LOC in the<br />

WHB<br />

12E-2<br />

facility<br />

canister<br />

transfer to<br />

shuttle car<br />

in Transfer<br />

Cell<br />

Hot Cell<br />

shield valve<br />

inadvertently<br />

closes on<br />

facility<br />

canister and<br />

shears the<br />

canister<br />

Potential for<br />

significant<br />

radioactive<br />

materials<br />

release<br />

4 4 Prevention: PM Program on shield<br />

valve; Crane and Hot Cell shield valve<br />

interlock; Torque limiter on shield<br />

valve; Canister design.<br />

Mitigation: Procedures and Training;<br />

Ventilation system; Emergency<br />

response procedure.<br />

NC3-F<br />

LOC in the<br />

WHB<br />

12E-3<br />

facility<br />

canister<br />

transfer to<br />

shuttle car<br />

in Transfer<br />

Cell<br />

Inadvertent<br />

movement <strong>of</strong><br />

crane while<br />

lowering<br />

facility<br />

canister<br />

partially<br />

lowered<br />

Potential for<br />

significant<br />

radioactive<br />

materials<br />

release<br />

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

Crane and Hot Cell shield valve<br />

interlock; Torque limiter on shield<br />

valve; Canister design.<br />

Mitigation: Procedures and Training;<br />

Ventilation system; Emergency<br />

response procedure.<br />

NC3-F<br />

LOC in the<br />

WHB<br />

12E-4<br />

facility<br />

canister<br />

transfer to<br />

shuttle car<br />

in Transfer<br />

Cell<br />

Inadvertent<br />

movement <strong>of</strong><br />

shuttle car<br />

with facility<br />

canister into<br />

Transfer Cell<br />

Potential for<br />

significant<br />

radioactive<br />

materials<br />

release<br />

4 4 Prevention: PM Program on shield<br />

valve/shuttle car interlock; Variable<br />

speed drive motor controller; Interlock<br />

between shuttle car and shield valve;<br />

Drive train on shuttle car - belts will<br />

slip; Canister design.<br />

Mitigation: Procedures and Training;<br />

Ventilation system; Emergency<br />

response procedure.<br />

5.1-44 January 22, 2003

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