Encasement pressurization after leaks in primary piping
Preliminary evaluations of existing tank farm waste transfer system encasement piping pressure response to flowing waste supernate following a large primary line leak indicate the potential to exceed current design conditions for the encasement piping system. The potential impact to design of the encasement piping systems is assessed in this paper. Based on the encasement pressure conditions reported, the existing encasement piping systems can perform their safety functions and are capable of withstanding the worst predicted pressure conditions for a large leak in the primary system. Testing is being conducted to validate parameters used in the completed preliminary supernate evaluations and to establish a basis for evaluation of slurry transfer leaks. The results of these tests will be incorporated into the evaluations after results become available. This report provides the current status of encasement pressure analyses to determine suitable conditions for design of encasement piping within the tank farms waste transfer systems. This report provides results of preliminary evaluations, activities necessary to complete the evaluations, potential impacts on existing piping systems, and demonstration of adequacy of the existing encasement piping for withstanding higher pressure than the current design pressure without jeopardizing the safety function of the encasement piping systems to direct the flow of leaked waste from the primary line to a waste transfer-associated structure for detection (i.e., the encasement will direct waste to a pit leak detector before there is any significant release of waste to the environment).
- Research Organization:
- CH2M Hill Hanford Group, Inc., Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM) (US)
- DOE Contract Number:
- AC27-99RL14047
- OSTI ID:
- 807325
- Report Number(s):
- RPP-8778, Rev.0; EDT-630974; TRN: US0301771
- Resource Relation:
- Other Information: PBD: 27 Sep 2001
- Country of Publication:
- United States
- Language:
- English
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