T.O. 33B-1-1Glossary 49(1)A composite metal, usually in the form of sheet or bar, composed of two or more metal layers so bondedthat the composite metal forms a structural member.(2)To form a metallic product of two or more bonded layers.LAMINATIONS: Discontinuities in plate, sheet or strip caused by pipe, inclusions, or blowholes in the original ingot;after rolling they are usually flat and parallel to the outside surface.LAMINOGRAPHY: A special form of tomography which is used for limiting an inspection to a single plane in thematerial; images of the condition along the plane of interest are brought into sharp focus while other images aresmeared or blurred.LAP: A surface defect, appearing as a seam, caused by folding over hot metal, fins or sharp corners and then rolling orforging them into the surface, but not welding them.LATENT IMAGE (RT): The metallic silver image of the material radiographed brought out by the developing process.LATITUDE (RT): Latitude, most closely aligned with contrast, is the range of thickness that can be transferred orrecorded on a radiograph within the useful reading range of film density. A high contrast has little latitude whereas alow contrast film will have great latitude.LATTICE: The repetitive three-dimensional arrangement of atoms in a solid.LAW: Liquid Active Waste.LAW OF RECIPROCITY, PHOTOGRAPHIC (RT): See RECIPROCITY LAW.LD (RT): See MEDIAN LETHAL DOSE.LEAD EQUIVALENT (RT): The thickness of lead affording the same attenuation of radiation under specifiedconditions, as the material in question.LEAD GLASS (RT): Glass containing a high proportion of lead compounds, used as a transparent shielding material.LEAD RUBBER (RT): Rubber containing a high proportion of lead compounds. It is used as a flexible shieldingmaterial.LEAD-RUBBER GLOVES (PROTECTIVE GLOVES) (RT): Gloves incorporating lead rubber as a shielding material.LEAD SCREENS: See SCREENS, LEAD.LEAK: A hole or void in the wall of an enclosure, capable of passing liquid or gas from one side to the other underaction of a pressure or concentration difference existing across the wall.LEAKAGE (RT): The undesired release of radioactive material from a sealed source.LEAKAGE FIELD: See FIELD, LEAKAGE.LEAKAGE RADIATION (RT): Radiation other than the useful beam emitted from an X-ray tube assembly or sourcehousing.LEAKAGE RATE: The quantity of gas per unit time at a given temperature and pressure, that flows through a leak orleaks; normally expressed in standard cubic centimeters per second (STD. cm3/s).
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
