12 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Critical Experiment"  
Results: 1 - 12
open access

The ORNL Modulating Heat Pump Design Tool User's Guide

Description: The ORNL Modulating Heat Pump Design Tool consists of a Modulating HPDM (Heat Pump Design Model) and a parametric-analysis (contour-data generating) front-end. Collectively the program is also referred to as MODCON which is in reference to the modulating and the contour data generating capabilities. The program was developed by Oak Ridge National Laboratory for the Department of Energy to provide a publicly-available system design tool for variable- and single-speed heat pumps.
Date: June 1, 2001
Creator: Rice, C.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Polyethylene-Reflected Arrays of HEU(93.2) Metal Units Separated by Vermiculite

Description: This benchmark details the results of an experiment performed in the early 1970s as part of a series testing critical configurations in three dimensional arrays. For this experiment, cylinders of 93.2% enriched uranium metal were arranged in a 2x2x2 array inside of a polyethylene reflector. Layers of vermiculite of varying heights were surrounding each cylinder to achieve criticality variations. A total of four experimental configurations were tested by D.W. Magnuson, and detailed in his experi… more
Date: September 1, 2010
Creator: Gorham, Mackenzie; Briggs, J. Blair; Bess, John D.; Dean, Virginia & Reed, Davis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CONCRETE REFLECTED ARRAYS OF U(93.2) METAL

Description: During the period from 1963 – 1973, experiments involving highly enriched uranium units were performed at the Oak Ridge National Laboratory Critical Experiments Facility to determine various critical configurations of three-dimensional arrays. The experiments formed a four-part series, and were reported by several different experimenters; the results of interest for this evaluation are those reported for the fourth experimentation, Critical Three-Dimensional Arrays of Neutron Interacting Units:… more
Date: September 1, 2010
Creator: Gorham, Mackenzie; Bess, John D.; Briggs, J. Blair; Dean, Virginia & Reed, Davis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Critical Experiments that Simulated Damp MOX Powders - Do They Meet the Need?

Description: The OECD Nuclear Energy Agency (NEA) Working Party on Nuclear Criticality Safety (WPNCS) identified the MOX fuel manufacturing process as an area in which there is a need for additional integral benchmark data. The specific need focused on damp MOX powders. The WPNCS was ultimately asked by the NEA Nuclear Science Committee (NSC) to provide the framework for the selection and performance of new experiments that fill the identified need. A set of criteria was established to enable uniform compar… more
Date: September 1, 2005
Creator: Briggs, J. Blair; Nouri, Dr. Ali & Nordborg, Dr. Claes
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Water-Reflected 233U Uranyl Nitrate Solutions in Simple Geometry

Description: A number of critical experiments involving {sup 233}U were performed in the Oak Ridge National Laboratory Building 9213 Critical Experiments Facility during the years 1952 and 1953. These experiments, reported in Reference 1, were directed toward determining bounding values for the minimum critical mass, minimum critical volume, and maximum safe pipe size of water-moderated solutions of {sup 233}U. Additional information on the critical experiments was found in the experimental logbooks. Two ex… more
Date: August 15, 2001
Creator: Elam, K.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of Enriched Uranyl Nitrate in Nested Annular Tank Array

Description: Two series of experiments were performed at the Rocky Flats Critical Mass Laboratory during the 1980s using highly enriched (93%) uranyl nitrate solution in annular tanks. [1, 2] Tanks were of typical sizes found in nuclear production plants. Experiments looked at tanks of varying radii in a co-located set of nested tanks, a 1 by 2 array, and a 1 by 3 array. The co-located set of tanks had been analyzed previously [3] as a benchmark for inclusion within the International Handbook of Evaluated C… more
Date: June 1, 2009
Creator: Bess, John D. & Cleaver, James D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Highly Enriched Uranyl Nitrate in Annular Tanks with Concrete Reflection: 1 x 3 Line Array of Nested Pairs of Tanks

Description: A series of seven experiments were performed at the Rocky Flats Critical Mass Laboratory beginning in August, 1980 (References 1 and 2). Highly enriched uranyl nitrate solution was introduced into a 1-3 linear array of nested stainless steel annular tanks. The tanks were inside a concrete enclosure, with various moderator and absorber materials placed inside and/or between the tanks. These moderators and absorbers included boron-free concrete, borated concrete, borated plaster, and cadmium. Two… more
Date: September 1, 2009
Creator: Cleaver, James; Bess, John D.; Devine, Nathan & Trumble, Fitz
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Benchmark Evaluation of Plutonium Nitrate Solution Arrays

Description: In October and November of 1981 thirteen approach-to-critical experiments were performed on a remote split table machine (RSTM) in the Critical Mass Laboratory of Pacific Northwest Laboratory (PNL) in Richland, Washington, using planar arrays of polyethylene bottles filled with plutonium (Pu) nitrate solution. Arrays of up to sixteen bottles were used to measure the critical number of bottles and critical array spacing with a tight fitting Plexiglas{reg_sign} reflector on all sides of the array… more
Date: September 1, 2011
Creator: Marshall, M. A. & Bess, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ORALLOY (93.2 235U) METAL CYLINDER WITH BERYLLIUM TOP REFLECTOR

Description: A variety of critical experiments were constructed of enriched uranium metal during the 1960s and 1970s at the Oak Ridge Critical Experiments Facility (ORCEF) in support of criticality safety operations at the Y-12 Plant. The purposes of these experiments included the evaluation of storage, casting, and handling limits for the Y-12 Plant and providing data for verification of calculation methods and cross-sections for nuclear criticality safety applications. These included solid cylinders of va… more
Date: September 1, 2010
Creator: Bess, John D.; Montierth, Leland M.; Reed, Raymond & Mihalczo, John T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Power Burst Facility: U(18)O2-CaO-ZrO2 Fuel Rods in Water

Description: The Power Burst Facility (PBF) reactor operated from 1972 to 1985 on the SPERT Area I of the Idaho National Laboratory, then known as Nuclear Reactor Test Station. PBF was designed to provide experimental data to aid in defining thresholds for and modes of failure under postulated accident conditions. PBF reactor startup testing began in 1972. This evaluation focuses on two operational loading tests, chronologically numbered 1 and 2, published in a startup-test report in 1974 [1]. Data for thes… more
Date: September 1, 2009
Creator: Damian, Jose Ignacio Marquez; Weir, Alexis; Putnam, Valeria L. & Bess, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen