CFRMF neutron radiography facility

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6526489

Stepan, I E; Anderson, D M; Harker, Y D

In reviewing the existing sources for neutron radiography it was determined early that the Coupled Fast Reactivity Measurement Facility (CFRMF) was the logical and economical choice. It is a swimming pool type reactor with space available for a collimator-radiograph assembly and a canal depth sufficient to reduce shielding requirements. The neutron source strength is sufficient to provide superior resolution with reasonable exposure times. The ratio of the source-sample distance to the source diameter (L/D) is an aspect ratio commonly quoted to indicate potential resolution; i.e., the greater the L/D ratio the better the resolution obtainable. Based on recent measurements using CFRMF nuclear radiograph facility, an L/D ratio of 200 has been obtained with reasonable exposure times (approximately 1 hr). The CFRMF radiograph facility is a dry tube facility. It is designed for radiographing radioactive materials which in most cases are irradiated fuel pins. It incorporates a platform placed on the canal parapet with shielding extending below the canal water level, shielded doors and positioning dowels for placement of a shielded cask. The dry tube of the radiograph assembly extends to the bottom of the canal, and into a hole extending 245 cm below the canal floor. A tapered collimater passes neutrons from the core to the samples to be radiographed. Dimensions of this collimater are: length 254 cm, maximum source aperture diameter 2.54 cm, object aperture 10 cm by 91 cm. Other source apertures of 1.9 cm and 1.27 cm are also provided. Samples longer than 91 cm require multiple radiographs to cover the entire length. Maximum sample length that can be accomodated is 416 m. Sample containment is incorporated in the positioning fixture so that contamination of the facility by the sample or vice versa is eliminated.

• Research Organization: Idaho National Engineering Lab., Idaho Falls (USA)
• DOE Contract Number: EY-76-C-07-1570
• OSTI ID: 6526489
• Report Number(s): CONF-781105-28
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
220600* -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
CFRMF REACTOR
DESIGN
EPITHERMAL REACTORS
EXPERIMENTAL REACTORS
FAST REACTORS
INDUSTRIAL RADIOGRAPHY
MATERIALS TESTING
NEUTRON RADIOGRAPHY
NONDESTRUCTIVE TESTING
REACTOR COMPONENTS
REACTOR EXPERIMENTAL FACILITIES
REACTORS
RESEARCH AND TEST REACTORS
TESTING
ZERO POWER REACTORS