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in creator/contributor: "Stanford, G.S."  
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New radiation hodoscope developments for Arms Control Treaty verification

Description: New developments in hodoscope radiation detection technology offer a wide range of unique capabilities for arms control treaty verification (ACTV) applications. Originally developed for civilian nuclear power research by Argonne National Laboratory, this concept uses an array of radiation detectors to image or detect objects inside opaque containments. Hodoscope systems may detect neutrons and/or gamma-rays. The systems may be based on transmission of radiation through the objects; may detect r… more
Date: January 1, 1991
Creator: Dickerman, C.E.; Doerner, R.C.; Regis, J.P.; Rhodes, E.A.; Stanford, G.S.; Travis, D.J. et al.
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Partner: UNT Libraries Government Documents Department
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Direct hodoscope monitoring of flux and power-coupling at TREAT

Description: The most important parameter in calibrating reactor-safety experiments at TREAT is test-fuel energy deposition during irradiation transients. The coupling of the reactor power to the test fuel depends on conditions that vary from experiment to experiment and vary during the transient. In order to more accurately determine the power coupling and better understand its time and space dependencies, data has been obtained by the fast-neutron hodoscope and compared to experiment calibrations, reactor… more
Date: January 1, 1983
Creator: DeVolpi, A.; Fink, C.L.; Rhodes, E.A. & Stanford, G.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Transient feedback from fuel motion in metal IFR (Integral Fast Reactor) fuel

Description: Results from hodoscope data analyses are presented for TREAT transient-overpower tests M5 through M7 with emphasis on transient feedback mechanisms, including prefailure expansion at the tops of the fuel pins, subsequent dispersive axial fuel motion, and losses in relative worth of the fuel pins during the tests. Tests M5 and M6 were the first TOP tests of margin to cladding branch and prefailure elongation of D9-clad ternary (U-Pu-Zr) IFR-type fuel. Test M7 extended these results to high-burnu… more
Date: January 1, 1990
Creator: Rhodes, E.A.; Stanford, G.S.; Regis, J.P.; Bauer, T.H. & Dickerman, C.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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TREAT experimental data base regarding fuel dispersals in LMFBR loss-of-flow accidents

Description: The reactivity feedback from fuel relocation is a central issue in the analysis of loss-of-flow (LOF) accidents in LMFBRs. Fuel relocation has been studied in a number of LOF simulations in the TREAT reactor. In this paper the results of these tests are analyzed, using, as the principal figure of merit, the changes in equivalent fuel worth associated with the fuel motion. The equivalent fuel worth was calculated from the measured axial fuel distributions by weighting the data with a typical LMF… more
Date: January 1, 1981
Creator: Simms, R.; Fink, C.L.; Stanford, G.S. & Regis, J.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fuel-motion diagnostics for PFR/TREAT experiments

Description: In all the transients in the PFR/TREAT series, fuel motion had been monitored by the fast-neutron hodoscope. This paper treats the enhancements in hodoscope operation and data analysis since the start of the PFR/TREAT tests. The hodoscope has a maximum viewing height of 1.2 m. Data collection intervals for the series have been in the order of 1 ms, depending on the duration of the transient. Mass-displacement resolutions of about 0.1 g are achievable for the single-pin tests and 1 g for 7-pin t… more
Date: January 1, 1984
Creator: DeVolpi, A.; Doerner, R.C.; Fink, C.L.; Regis, J.P.; Rhodes, E.A. & Stanford, G.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

THE PRELIMINARY CHOICE OF DESIGN PARAMETERS FOR NEUTRON CHOPPERS

Description: Some of the factors affecting the counting rate achieved by a neutron chopper spectrometer are investigated. It is shown that in a chopper of optimum design the counting rate per channel at any given energy is proportional both to the slit width and to the square of the resolution in mu sec/m, as well as to the cutoff velocity vc of the rotor; this last is because a larger number of bursts per second become possible as vc is increased. For an idealized cutoff function, it is shown that the tota… more
Date: November 1, 1961
Creator: Stanford, G.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Part I. Fuel-motion diagnostics in support of fast-reactor safety experiments. Part II. Fission product detection system in support of fast reactor safety experiments

Description: In all destructive fast-reactor safety experiments at TREAT, fuel motion and cladding failure have been monitored by the fast-neutron/gamma-ray hodoscope, providing experimental results that are directly applicable to design, modeling, and validation in fast-reactor safety. Hodoscope contributions to the safety program can be considered to fall into several groupings: pre-failure fuel motion, cladding failure, post-failure fuel motion, steel blockages, pretest and posttest radiography, axial-po… more
Date: May 1, 1986
Creator: Devolpi, A.; Doerner, R.C.; Fink, C.L.; Regis, J.P.; Rhodes, E.A.; Stanford, G.S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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