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CHARACTERIZATION OF CONCRETE CONDITION USING ACOUSTIC TOMOGRAPHIC IMAGING

Award Information

Agency:
Nuclear Regulatory Commission
Branch:
N/A
Award ID:
20864
Program Year/Program:
1994 / SBIR
Agency Tracking Number:
20864
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Atkinson-noland Assoc. Inc.
2619 Spruce Street Boulder, CO 80302
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1994
Title: CHARACTERIZATION OF CONCRETE CONDITION USING ACOUSTIC TOMOGRAPHIC IMAGING
Agency: NRC
Contract: N/A
Award Amount: $172,613.00
 

Abstract:

RESIDUAL LIFETIME EVALUATION OF EXISTING NUCLEAR FACILITIES REQUIRES DETAILED INFORMATION REGARDING CONDITION OF CONTAINMENT AND SUPPORT STRUCTURES. CURRENT NONDESTRUCTIVE METHODS FOR SUBSURFACE EVALUATION OF REINFORCED CONCRETE USE COMPLEX EQUIPMENT AND RELY HEAVILY ON INTERPRETATION BY THE OPERATOR. A RESEARCH EFFORT IS PROPOSED TO EXAMINE THE USE OF COMPUTERIZED TOMOGRAPHIC IMAGING FOR LOCATING SUBSURFACE FEATURES IN REINFORCED CONCRETE STRUCTURES. ACOUSTIC PULSE VELOCITY DATA WILL BE USED AS THE BASE INFORMATION FOR IMAGE RECONSTRUCTIONS. THE APPROACH WOULD PROVIDE A CROSS-SECTIONAL IMAGE OF THE MASS BEING INVESTIGATED, SHOWING THE VELOCITY DISTRIBUTION THROUGHOUT THE INTERIOR OF THE CONCRETE. THE IMAGE OF CONCRETE CONDITION CAN BE ANALYZED AND USED AS A BASIS FOR DETERMINING THE INTERNAL CONCRETE CONDITION AND THE NECESSITY OF REPAIRS. A NUMBER OF INTIAL PROBLEMS WILL BE ADDRESSED, PERTAINING TO DETERMINATION OF APPROPRIATE STRESS WAVE PARAMETERS AND OPTIMIZATION OF DATA GATHERING TECHNIQUES. A MASS CONCRETE SPECIMEN WILL BE CONSTRUCTED TO INCORPORATE FEATURES OF INTEREST, SUCH AS REINFORCING STEEL, DENSITY VARIATIONS, CRACKS, AND VOIDS. THE MAIN PORTION OF THE STUDY WILL CONCENTRATE OF DETERMINING THE ABILITY OF ACOUSTIC IMAGING TECHNIQUES TO IDENTIFY THE PRESENCE AND LOCATION OFSUCH FEATURES.

Principal Investigator:

Richard Atkinson
Vice President
0

Business Contact:

Small Business Information at Submission:

Atkinson-noland & Associates
2619 Spruce St Boulder, CO 80302

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No