Solid State Sensor System for Inspection of Prestressed Concrete Pressure Pipe

Award Information
Agency: Environmental Protection Agency
Branch: N/A
Contract: EP-D-13-027
Agency Tracking Number: EP-D-13-027
Amount: $80,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2013
Solicitation Year: 2013
Solicitation Topic Code: A
Solicitation Number: N/A
Small Business Information
44 Hunt St., Watertown, MA, 02472-4699
DUNS: 073804411
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Noa Rensing
 (617) 668-6943
Business Contact
 Joanne Gladstone
Phone: (617) 668-6800
Research Institution
An important type of water pipe is the Prestressed Concrete Cylinder Pipe (PCCP). There are thousands of miles of PCCP installed in the US in sections with length up to 20 feet and diameter for 2 to 14 feet. The large size of the pipes, the thickness of the concrete (up to 10 inches) and the composite construction, which involved concrete, high strength prestressing steel wires and sheet steel cylinders, make inspection particularly challenging with existing technology.§Degradation in PCCP is characterized by corrosion that breaks one or more prestressing wires thus weakening the pipe until it fails and a leak is created. Leaks are among the largest sources of water loss and technology for detecting damage in the prestressing wires in PCCP would provide a majorenvironmental benefit for the nations, its water resources and water utilities. Existing sensor technology, based on decades-old eddy current test systems, lacks the sensitivity and signal to noise ratio needed to make rapid, high reliability inspections of PCCP. §RMD proposes a new, highly optimized probe for PCCP that uses a solid-state, field sensitive sensor offering high sensitivity and low noise at low frequencies combined with a novel, low noise eddy current source to greatly improve PCCP inspection. §In Phase I, RMD will develop a prototype probe for PCCP, measure the response of the probe to PCCP samples with and without defects to the prestressing wires, and compare the results with those obtained using a state-or-the-art ECT system for PCCP. A successful Phase I/II SBIR program will lead to improved PCCP inspection, less water loss and improved environmental safeguards for drinking water. Commercialization will result in a new product that will enhance the safety and reliability of water systems, and reduce lost water and downtime for water utilities.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government