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

WIPP RH PSAR DOE/WIPP-03-3174 CHAPTER 5
TEEL-1
TEEL-2
TEEL-3
The maximum concentration in air below which it is believed nearly all individuals could
be exposed without experiencing other than mild transient adverse health effects or
perceiving a clearly defined objectionable odor.
The maximum concentration in air below which it is believed nearly all individuals could
be exposed without experiencing or developing irreversible or other serious health effects
or symptoms that could impair their abilities to take protective action;
The maximum concentration in air below which it is believed nearly all individuals could
be exposed without experiencing or developing life-threatening health effects.
The chemicals and hazardous materials in the RH waste that do not have ERPG values will substitute the
TEEL value in lieu of the ERPG value:
ERPG-1 TEEL-1
ERPG-2
ERPG-3
TEEL-2
TEEL-3
5.2.3 Accident Analysis
5.2.3.1 RH1 Fire in the Underground
Scenario Description - The HAZOP 28 postulated a waste canister breach from a fire in the Underground
facility. The HAZOP postulated two hazardous events (9-7 and 10-2) that could result in a fire in the
Underground facility which could cause a significant release of radioactivity.
Hazardous event 9-7 postulates a diesel fuel fire on forklift during the transfer of facility cask to disposal
room. The forklift usually has about 20 gal (75.7 L) of diesel fuel. The cause of this event is a diesel
fuel leak. An ignition source could ignite the fuel and cause a fire. The fire could potentially damage the
facility cask and waste canister and cause a breach of the waste canister because neither the facility cask
or the waste canister are qualified for a fire. The thermal stress on the breached waste canister could
cause a significant release of radioactivity. The immediate worker(s) could also receive a significant
direct radiological exposure from the breached waste canister.
The hazardous event 10-2 postulates a hydraulic oil fire on the Horizontal Emplacement and Retrieval
Equipment (HERE) during emplacement of the waste canister in the borehole. The HERE usually has
about 40 gal (151.4 L) of hydraulic oil. 29 The cause of this event is a hydraulic oil leak. An ignition
source could ignite the hydraulic oil and cause a fire. According to Material Safety Data Sheet (MSDS),
the hydraulic oil is slightly flammable (NFPA rating of 1). 30 The fire could potentially damage the
facility cask and waste canister and cause a breach of the waste canister because neither the facility cask
or the waste canister are qualified for a fire. The thermal stress on the breached waste canister could
cause a significant release of radioactivity. The immediate worker(s) could also receive a significant
direct radiological exposure from the breached waste canister.
Preventive and Mitigative Features - General preventive and mitigative measures identified in the
HAZOP for this specific scenario are listed in Table 5.1-10.
Estimated Frequency - The HAZOP Team qualitatively estimated the frequency of occurrence of a fire in
a waste canister in the Underground facility to be in the anticipated range (10 -1 $ frequency>10 -2 ) for both
5.2-19 January 22, 2003