Published 1975 | Version v1
Report Restricted

In-plant nondestructive assay of HTGR fuel materials

Creators

Description

The performance characteristics of three different nondestructive assay systems for the measurement of HTGR fuel are described. These include the segmented gamma scanner which uses the passive gamma emission from the 235U together with a segment-by-segment axial scan and transmission with an external source to correct for gamma absorption. The Random Driver is an active, fast-neutron interrogation system which employs 241AmLi(α,n) neutron sources to induce fissions in the sample fissile material. This system is applicable to bulk samples of HTGR fuel particles and large groups of fuel rods. The third system considered is the 252Cf Fuel Rod Assay System, which uses thermal neutron interrogation and prompt-fission neutron counting to measure the total fissile content in a fuel rod or stack. In addition, the pellet-to-pellet or rod-to-rod uniformity is measured by counting the delayed gamma rays in a NaI(Tl) through-hole detector. (auth)

Availability note (English)

MF available from INIS under the Report Number.

Files

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Additional details

Publishing Information

Imprint Pagination
28 p.
Report number
LA-UR--75-1712

Conference

Title
Symposium on safeguards of nuclear materials.
Dates
20 Oct 1975.
Place
Vienna, Austria.

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
7229520
Subject category
S98: NUCLEAR DISARMAMENT, SAFEGUARDS AND PHYSICAL PROTECTION; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
FAST NEUTRONS; FISSILE MATERIALS; FUEL PARTICLES; FUEL RODS; GAMMA FUEL SCANNING; HTGR TYPE REACTORS; NEUTRON SOURCES; NONDESTRUCTIVE ANALYSIS; NUCLEAR MATERIALS MANAGEMENT; THERMAL NEUTRONS
Descriptors DEC
BARYONS; CHEMICAL ANALYSIS; ELEMENTARY PARTICLES; FERMIONS; FISSIONABLE MATERIALS; FUEL ELEMENTS; FUEL SCANNING; GAMMA RADIOGRAPHY; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; HADRONS; INDUSTRIAL RADIOGRAPHY; MANAGEMENT; MATERIALS TESTING; NEUTRONS; NONDESTRUCTIVE TESTING; NUCLEONS; PARTICLE SOURCES; RADIATION SOURCES; REACTOR COMPONENTS; REACTORS; TESTING

Optional Information

Secondary number(s)
CONF-751017--8.