Dual isotope method to radiograph structures in nuclear steam supply systems
Creators
Description
This patent describes a steam generator having a vessel housing of open-ended tubes arranged laterally adjacent to one another and supported near their ends by a substantially continuous tube sheet extending across the vessel. The tubes are supported by inter-tube structure periodically placed intermediate the tube ends. The method of interrogating a predetermined portion of the inter-tube structure for defects consists of the following steps: a. inserting two radiation sources which are spaced from each other into a first tube to position each of the sources a predetermined vertical distance on each side of the plane of the inter-tube support structure portion. B. and inserting a radiation responsive image recording means in a second tube adjacent to the portion of the inter-tube support structure so that the support portion interrogated is between the two tubes to receive a uniform density of radiation from the two sources through the penetrated portion
Availability note (English)
U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50.Additional details
Publishing Information
- Imprint Pagination
- vp.
- IPC:
- Int. Cl. G21C 17/00.
- IPC
- Int. Cl. G21C 17/00.
- Patent number
- US patent document 4,567,012/A/
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 17078457
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- DEFECTS; IMAGE PROCESSING; INDUSTRIAL RADIOGRAPHY; RADIATION SOURCES; RADIOISOTOPES; REACTOR COOLING SYSTEMS; RECORDING SYSTEMS; SPACE DEPENDENCE; STEAM; STEAM GENERATORS
- Descriptors DEC
- BOILERS; COOLING SYSTEMS; ISOTOPES; MATERIALS TESTING; NONDESTRUCTIVE TESTING; REACTOR COMPONENTS; TESTING; VAPOR GENERATORS