Critical dimensions of systems containing /sup 235/U, /sup 239/Pu, and /sup 233/U: 1986 Revision Page: 2 of 205

TABLE OF CONTENTS

PREFAC'E vi
A LBSTIH ACTi I
INT HoDlTION 1
PART I - INDIVIDUAL UNITS 3
HISTORY OF EARLY CRITICAL EXPERIMENTS 4
EXPEII lENTS REI.ATE)D TO ) THE WEAPONS PROGRAM 4
EXPEB I NFNTS RELA 'ED TO THE (;ASEO1'S DIFFUISION PROCESS 4
TRANSITION TO FACILITIES FOR CRITIC'AL EXPERIMENTS 12
RELATIONS FOR CONVERSION TO STANDARD CONDITIONS 13
C(YLNDER-SPHERE CON\'EISIONS 13
('ORE-DENSITY CONVERSIUNS 19
HOMOGENEOUS HYDROGEN-MODERATED URANIUM 23
HIGHLY ENRICHED URANIUM 23
tRANIU\ OF VARIOUS ENRICHMENTS 31
HETEROGENEOUS WATER-MODERATED URANIUM AT 44
VARIOUS ENRICHMENTS
NEAR-HOIOCENEOI'S HYDROGEN-MODERATED URANIUM 44
ENRICHED IN 23"U
WATER-MODERATED LATTICES OF SLIGHTLY ENRICHED 44
URANIUM
WATER-SPACED ,NITS OF ENRICHED URANIUM 49
Highly Enriched Uranium 49
Uranium of Various Enrichments 51
METAL-SOLUTION MIXTURES 56
HOMOGENEOUS HYDROGEN-MODERATED PLUTONIUM 59
PLUTONIUM SOLUTIONS, LOW 40Pu 59
PLUTONIUM SOLUTIONS, UNLIMITED 240Pu T1
PLUTONIUM - POLYSTYRENE COMPACTS 74
HOMOGENEOtUS PLUTONIUM-URANIUM SYSTEMS 74
WATER-MODERATED PLUTONIUM AND PLUTONIUM- 76
URANIUM LATTICES
HOMOGENEOUS HYDROGEN-MODERATED 237U 78

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Paxton, H.C. & Pruvost, N.L. Critical dimensions of systems containing /sup 235/U, /sup 239/Pu, and /sup 233/U: 1986 Revision, report, July 1, 1987; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1109879/m1/2/ocr/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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