You need JavaScript to view this

Pulsed Source Measurements on a Uranium-Water Subcritical Assembly; Mesures Faites sur un Assemblage Sous- Critique Uranium-Eau Ordinaire a l'Aide d'une Source Pulsee; Izmereniya s pomoshch'yu istochnikov impul'snykh nejtronov na urano-vodnoi podkriticheskoi sborke; Mediciones con Fuentes Pulsantes en un Conjunto Subcritico Uranio-Agua

Conference:

Abstract

An unreflected assembly of natural uranium and light water has been used in conjunction with a pulsed source of neutrons for decay-time measurements at different bucklings. Four different lattice pitches over the range 3.94 cm to 5.08 cm were obtained by using different pairs of accurately machined lattice plates and in each case the uranium was in the form of bars 109.8 cm long and 3.0 cm diameter. The fuel- was mounted horizontally and loadings up to approximately 6 t were involved. Spatial harmonics were eliminated or selected by appropriate placing of a small scintillation detector. Experimental results showing the dependence of decay constant on buckling are presented and compared with theoretical values. (author) [French] On a utilise conjointement un assemblage sans reflecteur uranium naturel-eau ordinaire et une source puisee en vue de mesurer le temps de decroissance pour differents laplaciens. - Plusieurs paires de plaques de reseau usinees avec precision ont permis d'adopter quatre differents pas de reseau allant de 3,94cm a 5,08 cm; dans chaque cas, l'uranium etait sous forme de barres de 109,8 cm de long et de 3,0 cm de diametre. Le combustible etait monte horizontalement et le chargement a atteint parfois jusqu'a pres de 6  More>>
Authors:
Gibson, I. H.; Walker, J. [1] 
  1. Department of Physics, University of Birmingham, Birmingham (United Kingdom)
Publication Date:
Feb 15, 1964
Product Type:
Conference
Report Number:
IAEA-SM-42/11
Resource Relation:
Conference: Symposium on Exponential and Critical Experiments, Amsterdam (Netherlands), 2-6 Sep 1963; Other Information: 9 refs., 3 tabs., 2 figs.; Related Information: In: Exponential and Critical Experiments Vol. I. Proceedings of the Symposium on Exponential and Critical Experiments| 494 p.
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 22 GENERAL STUDIES OF NUCLEAR REACTORS; BUCKLING; COMPARATIVE EVALUATIONS; DECAY; FUEL PLATES; NATURAL URANIUM; NEUTRONS; PARTICLE DECAY; PULSED NEUTRON TECHNIQUES; REACTOR LATTICE PARAMETERS; SCINTILLATION COUNTERS; SUBCRITICAL ASSEMBLIES; THEORETICAL DATA; TIME MEASUREMENT; WATER
OSTI ID:
22121984
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M2672078095
Submitting Site:
INIS
Size:
page(s) 469-479
Announcement Date:
Aug 29, 2013

Conference:

Citation Formats

Gibson, I. H., and Walker, J. Pulsed Source Measurements on a Uranium-Water Subcritical Assembly; Mesures Faites sur un Assemblage Sous- Critique Uranium-Eau Ordinaire a l'Aide d'une Source Pulsee; Izmereniya s pomoshch'yu istochnikov impul'snykh nejtronov na urano-vodnoi podkriticheskoi sborke; Mediciones con Fuentes Pulsantes en un Conjunto Subcritico Uranio-Agua. IAEA: N. p., 1964. Web.
Gibson, I. H., & Walker, J. Pulsed Source Measurements on a Uranium-Water Subcritical Assembly; Mesures Faites sur un Assemblage Sous- Critique Uranium-Eau Ordinaire a l'Aide d'une Source Pulsee; Izmereniya s pomoshch'yu istochnikov impul'snykh nejtronov na urano-vodnoi podkriticheskoi sborke; Mediciones con Fuentes Pulsantes en un Conjunto Subcritico Uranio-Agua. IAEA.
Gibson, I. H., and Walker, J. 1964. "Pulsed Source Measurements on a Uranium-Water Subcritical Assembly; Mesures Faites sur un Assemblage Sous- Critique Uranium-Eau Ordinaire a l'Aide d'une Source Pulsee; Izmereniya s pomoshch'yu istochnikov impul'snykh nejtronov na urano-vodnoi podkriticheskoi sborke; Mediciones con Fuentes Pulsantes en un Conjunto Subcritico Uranio-Agua." IAEA.
@misc{etde_22121984,
title = {Pulsed Source Measurements on a Uranium-Water Subcritical Assembly; Mesures Faites sur un Assemblage Sous- Critique Uranium-Eau Ordinaire a l'Aide d'une Source Pulsee; Izmereniya s pomoshch'yu istochnikov impul'snykh nejtronov na urano-vodnoi podkriticheskoi sborke; Mediciones con Fuentes Pulsantes en un Conjunto Subcritico Uranio-Agua}
author = {Gibson, I. H., and Walker, J.}
abstractNote = {An unreflected assembly of natural uranium and light water has been used in conjunction with a pulsed source of neutrons for decay-time measurements at different bucklings. Four different lattice pitches over the range 3.94 cm to 5.08 cm were obtained by using different pairs of accurately machined lattice plates and in each case the uranium was in the form of bars 109.8 cm long and 3.0 cm diameter. The fuel- was mounted horizontally and loadings up to approximately 6 t were involved. Spatial harmonics were eliminated or selected by appropriate placing of a small scintillation detector. Experimental results showing the dependence of decay constant on buckling are presented and compared with theoretical values. (author) [French] On a utilise conjointement un assemblage sans reflecteur uranium naturel-eau ordinaire et une source puisee en vue de mesurer le temps de decroissance pour differents laplaciens. - Plusieurs paires de plaques de reseau usinees avec precision ont permis d'adopter quatre differents pas de reseau allant de 3,94cm a 5,08 cm; dans chaque cas, l'uranium etait sous forme de barres de 109,8 cm de long et de 3,0 cm de diametre. Le combustible etait monte horizontalement et le chargement a atteint parfois jusqu'a pres de 6 t. Grace a un petit detecteur a scintillations convenablement place, on a pu eliminer les harmoniques spatiaux ou les selectionner. Les auteurs presentent des resultats d'experiences qui montrent les variations de la constante de desintegration en fonction du laplacien, et les comparent avec les valeurs theoriques. (author) [Spanish] Los autores utilizaron un conjunto de uranio natural y agua ligera, sin reflector, juntamente con una fuente neutronica pulsante, para efectuar determinaciones del tiempo de desintegracion en correspondencia con diferentes valores del laplaciano. En este conjunto se pueden establecer cuatro diferentes espaciamientos del reticulado, desde 3,94 cm hasta 5,08 cm. utilizando diferentes pares de placas de reticulado rectificadas con precision; en todos los casos el uranio adopta la forma de barras de 109,8 cm de largo por 3,0 cm de diametro. El combustible se monta horizontalmente, alcanzando el peso de las cargas hasta unas 6 t. Se eliminan, o eligen a voluntad, los armonicos espaciales ubicando convenientemente un pequeno detector de centelleo. Los autores presentan resultados experimentales que indican la relacion de dependencia existente entre la constante de desintegracion y el laplaciano y los comparan con los valores hallados teoricamente. (author) [Russian] Sborka na prirodnom urane i legkoj vode bez otrazhatelja ispol'zuetsja sovmestno s istochnikom impul'snyh nejtronov dlja izmerenija vremeni raspada pri razlichnyh znachenijah laplasiana. Chetyre razlichnyh shaga reshetki na otrezke 3,94 - 5,8 sm byli polucheny putem ispol'zovanija razlichnyh par horosho obrabotannyh plastinok reshetki, v kazhdom sluchae uran byl v vide sterzhnej dlinoj 109,8 i diametrom 3,0 sm. Sterzhni ustanavlivalis' gorizontal'no, ves zagruzok sostavljal priblizitel'no 6 t. Prostranstvennye kolebanija ustranjalis' ili vydeljalis' putem sootvetstvujushhego ustanovlenija nebol'shogo scintilljacionnogo detektora. Budut predstavleny i sravneny s teoreticheskimi dannymi rezul'taty opytov, pokazyvajushhie zavisimost' postojannoj raspada ot laplasiana. (author)}
place = {IAEA}
year = {1964}
month = {Feb}
}