Apparatus for passive removal of subsurface contaminants
Patent
·
OSTI ID:512416
An apparatus is provided which passively removes contaminated gases from a subsurface. The apparatus includes a riser pipe extending into a subsurface which has an exterior end in fluid communication with a valve. When well pressure is greater than atmospheric pressure, the valve opens to release contaminants into the atmosphere, and when well pressure is less than atmospheric pressure, the valve closes to prevent flow of air into the well. The valve assembly of the invention comprises a lightweight ball which is lifted from its valve seat with a slight pressure drop between the well and the atmosphere. 7 figs.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- Westinghouse Savannah River Co., Inc., Aiken, SC (United States)
- Patent Number(s):
- US 5,641,245/A/
- Application Number:
- PAN: 8-446,372
- OSTI ID:
- 512416
- Resource Relation:
- Other Information: PBD: 24 Jun 1997
- Country of Publication:
- United States
- Language:
- English
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