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Title: Measuring the Multiplication of Spent Fuel Assemblies – It’s easier than you think!

Abstract

This is a set of eight slides which advertise how easy it can be to measure the multiplication of a spent fuel assembly. A robust (fission chambers), rapid (under 15 minutes), direct (multiplication is measured, not photons from fission fragments) measurement of multiplication is possible.

Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1332201
Report Number(s):
LA-UR-16-28655
TRN: US1700715
DOE Contract Number:
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SPENT FUELS; FISSION CHAMBERS; MULTIPLICATION FACTORS; FISSION NEUTRONS; FUEL ASSEMBLIES; MEASURING METHODS

Citation Formats

Tobin, Stephen Joseph. Measuring the Multiplication of Spent Fuel Assemblies – It’s easier than you think!. United States: N. p., 2016. Web. doi:10.2172/1332201.
Tobin, Stephen Joseph. Measuring the Multiplication of Spent Fuel Assemblies – It’s easier than you think!. United States. doi:10.2172/1332201.
Tobin, Stephen Joseph. Wed . "Measuring the Multiplication of Spent Fuel Assemblies – It’s easier than you think!". United States. doi:10.2172/1332201. https://www.osti.gov/servlets/purl/1332201.
@article{osti_1332201,
title = {Measuring the Multiplication of Spent Fuel Assemblies – It’s easier than you think!},
author = {Tobin, Stephen Joseph},
abstractNote = {This is a set of eight slides which advertise how easy it can be to measure the multiplication of a spent fuel assembly. A robust (fission chambers), rapid (under 15 minutes), direct (multiplication is measured, not photons from fission fragments) measurement of multiplication is possible.},
doi = {10.2172/1332201},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Nov 09 00:00:00 EST 2016},
month = {Wed Nov 09 00:00:00 EST 2016}
}

Technical Report:

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  • Experiments were conducted to determine the source neutron multiplication of EGCR fuel assemblies under conditions which might exist in transportation and storage. Twenty-eight fuel assemblies were arranged to yield maximum nuclear reactivity under conditions which might be expected for out-of- reactor environments. It was found that these 28 assemblies cannot be made critical when water moderated and reflected. (auth)
  • The objective of this report was to evaluate four possible alternative methods of preparing and packaging spent fuel assemblies for geologic disposal against the Reference Process of unmodified spent fuel. The four alternative processes were: (1) End fitting removal, (2) Fission gas venting and resealing, (3) Fuel bundle disassembly and close packing of fuel pins, and (4) Fuel shearing and immobilization. Systems analysis was used to develop a basis of comparison of the alternatives. Conceptual processes and facility layouts were devised for each of the alternatives, based on technology deemed feasible for the purpose. Assessments were made of 15 principalmore » attributes from the technical, operational, safety/risk, and economic considerations related to each of the alternatives, including both the surface packaging and underground repository operations. Specific attributes of the alternative processes were evaluated by assigning a number for each that expressed its merit relative to the corresponding attribute of the Reference Process. Each alternative process was then ranked by summing the numbers for attributes in each of the four assessment areas and collectively. Fuel bundle disassembly and close packing of fuel pins was ranked the preferred method of disposal of spent fuel. 63 references, 46 figures, 46 tables.« less
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  • Until fairly recently, most segments of the American public, particularly our various elites, supported American nuclear policy, namely the maintenance of large and expanding nuclear stockpiles, the official foreswearing of the use of these weapons in a strategic first-strike, and the policy of threatening retaliation for Soviet nuclear attacks in war, by nuclear attacks on enemy cities and military centers. There is increasing evidence that this support is rapidly eroding; especially among key American elites. This is shown through increasingly vocal dissatisfaction with the continued growth and modernization of the nuclear stockpile; and second, in the dawning awareness of amore » discrepancy between our official policy of no first-strike and contingency plans to employ first-strike tactical nuclear weapons in the event of a Warsaw Pact attack upon Western Europe. Concerns have surfaced here due both to distaste at the growing size of our nuclear arsenal and the perception that we have not been altogether honest in our official stance of a no first-strike with nuclear weapons. Increasing numbers of Americans are coming to see our nuclear policy as inconsistent, senseless, and, most significantly, immoral, and therefore support a nuclear freeze.« less