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US 2009/0154634 A1Published application
Passive check valve system
AssigneeGE-Hitachi Nuclear Energy Americas LLC
InventorsYee Kwong Cheung, Joel P. Melito
Life of this patent
Estimating the term…
Abstract
A passive check valve system according to the present disclosure includes a vacuum breaker operatively connecting a wetwell and a drywell. A discharge pool of water may be provided in the drywell. A housing structure is provided in the drywell to enclose the vacuum breaker. The housing structure may have one or more discharge pipes extending into the discharge pool, and the volume of the discharge pool may be greater than an interior volume of the one or more discharge pipes.
Claims18
A check valve system, comprising:
- a vacuum breaker operatively connecting a wetwell and a drywell, the vacuum breaker having a portion in the drywell;
- a discharge pool in the drywell;
- and
- a housing in the drywell completely enclosing the portion of the vacuum breaker in the drywell, the housing having one or more discharge pipes extending into the discharge pool, and a volume of the discharge pool being greater than an interior volume of the one or more discharge pipes.
1 more element
A check valve system, comprising:
- a vacuum breaker operatively connecting a wetwell and a drywell;
- a discharge pool in the drywell;
- and
- a housing in the drywell enclosing the vacuum breaker such that the vacuum breaker is not exposed to the drywell, the housing having one or more discharge pipes extending into the discharge pool, and a volume of the discharge pool being greater than an interior volume of the one or more discharge pipes.
1 more element
A check valve system, comprising:
- a vacuum breaker operatively connecting a wetwell and a drywell;
- a discharge pool in the drywell;
- and
- a housing in the drywell enclosing the vacuum breaker without contacting the vacuum breaker, the housing having one or more discharge pipes extending into the discharge pool, and a volume of the discharge pool being greater than an interior volume of the one or more discharge pipes.
1 more element
Dependencies are inferred from the claim text.