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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 APPENDIX D<br />

Figure D-4, Event Tree for NC-1 - Fire in Hot Cell (9-1)<br />

Drums per<br />

Year<br />

Ignition Source<br />

(Electrical<br />

Short)<br />

Combustibles<br />

Present<br />

Sufficient Oxidant<br />

in Drum<br />

HEPA Filtration<br />

Drum Breach<br />

Frequency<br />

(per Year )<br />

N Drums F Ignition(ES) F Comb<br />

L_oxidant L_filter_WHB F 9-1<br />

4.20E-03<br />

yes<br />

1.00E+00 4.37E-07 WCR<br />

Bypass<br />

1.00E-04 4.37E-11 ESR<br />

Intact<br />

1.00E-04<br />

yes<br />

5.00E-04 9.96E-01 None NR<br />

yes<br />

no<br />

2.08E+03 1.00E+00 None NR<br />

no<br />

1.00E+00 None NR<br />

no<br />

LEGEND:<br />

NR:<br />

ESR:<br />

SR:<br />

WCR:<br />

No Release<br />

Extremely Small Release<br />

Small Release<br />

Worst Case Release<br />

Total Frequency<br />

4.37E-07<br />

D-15 1/27/03

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