Study of x ray and isotopic techniques for boreside radiography of tube-to-tubesheet welds
Radiographic techniques for the evaluation of tube-to-tubesheet weld joints for the LMFBR steam generators were studied. Basically, the approach involved placing a small radiation source on the central axis of the tube adjacent to the weld joint, putting a radiographic film around the joint, and making a 360/sup 0/ panoramic exposure of the joint on a single radiograph. These studies included: (1) developing a unique film cassette design; (2) determining comparative radiographic sensitivities, using /sup 192/Ir, /sup 170/Tm, /sup 169/Yb, and a small-diameter rod-anode x-ray unit with various film-screen combinations; and (3) using miniaturized wire- and plaque-type penetrameters. These techniques were successfully used to evaluate tube-to-tubesheet weld joints with an inside diameter as small as 0.40 in. (10 mm) and wall thicknesses up to 0.36 in. (9 mm).
- Research Organization:
- Oak Ridge National Lab., TN
- OSTI ID:
- 7218652
- Journal Information:
- Mater. Eval.; (United States), Journal Name: Mater. Eval.; (United States) Vol. 35:7; ISSN MAEVA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Penetrameter positioner for bore-side radiography of tubes
Penetrameter positioner for bore-side radiography of tubes
Related Subjects
210500 -- Power Reactors
Breeding
42 ENGINEERING
420500* -- Engineering-- Materials Testing
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BREEDER REACTORS
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
EPITHERMAL REACTORS
EVEN-ODD NUCLEI
FAST REACTORS
FBR TYPE REACTORS
HEAVY NUCLEI
INDUSTRIAL RADIOGRAPHY
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IRIDIUM 192
IRIDIUM ISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
JOINTS
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
MATERIALS TESTING
MINUTES LIVING RADIOISOTOPES
NONDESTRUCTIVE TESTING
NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
REACTORS
TESTING
THULIUM 170
THULIUM ISOTOPES
WELDED JOINTS
X-RAY RADIOGRAPHY
YEARS LIVING RADIOISOTOPES
YTTERBIUM 169
YTTERBIUM ISOTOPES