Frequency of deflagration in the in-tank precipitation process tanks due to loss of nitrogen purge system. Revision 2
High-level liquid wastes (HLLW) from the processing of nuclear material at the Savannah River Site (SRS) are stored in large tanks in the F- and H-Area tank farms. The In-Tank Precipitation (ITP) process is one step in the processing and disposal of HLLW. The process hazards review for the ITP identified the need to implement provisions that minimize deflagration/explosion hazards associated with the process. The objective of this analysis is to determine the frequency of a deflagration in Tank 48 and/or 49 due to nitrogen purge system failures (including external events) and coincident ignition source. A fault tree of the nitrogen purge system coupled with ignition source probability is used to identify dominant system failures that contribute to the frequency of deflagration. These system failures are then used in the recovery analysis. Several human actions, recovery actions, and repair activities are identified that reduce total frequency. The actions are analyzed and quantified as part of a Human Reliability Analysis (HRA). The probabilities of failure of these actions are applied to the fault tree cutsets and the event trees.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 10146186
- Report Number(s):
- WSRC-TR-93-169-Rev.2; ON: DE94010829; TRN: 94:005017
- Resource Relation:
- Other Information: PBD: Jan 1994
- Country of Publication:
- United States
- Language:
- English
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Human reliability analysis for In-Tank Precipitation alignment and startup of emergency purge ventilation equipment. Revision 1
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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
TANKS
FAILURE MODE ANALYSIS
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE PROCESSING
HUMAN FACTORS
LIQUID WASTES
FAULT TREE ANALYSIS
052002
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WASTE DISPOSAL AND STORAGE
HEALTH AND SAFETY