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Experimental Studies on Assemblies 1 and 2 of the Fast Reactor FR-0. Part 2

Abstract

In a first part of this report, published as AE-195, an account was given of critical mass determinations and measurements of flux distribution and reaction ratios in the first assemblies of the fast zero power reactor FR0. This second part of the report deals with various investigations involving the measurement of reactivity. Control rod calibrations have been made using the positive period, the inverse multiplication, the rod drop and the pulsed source techniques, and show satisfactory agreement between the various methods. The reactivity worths of samples of different materials and different sizes have been measured at the core centre. Comparisons with perturbation calculations show that the regular and adjoint fluxes are well predicted in the central region of the core. The variation in the prompt neutron life-time with reactivity has been studied by means of the pulsed source and the Rossi-{alpha} techniques. Comparison with one region calculations reveals large discrepancies, indicating that this simple model is inadequate. Some investigations of streaming effects in an empty channel in the reactor and of interaction effects between channels have been made and are compared with theoretical estimates. Measurements of the reactivity worth of an air gap between the reactor halves and of the  More>>
Publication Date:
Dec 15, 1965
Product Type:
Technical Report
Report Number:
AE-207
Resource Relation:
Other Information: 30 refs., 25 figs., 7 tabs.
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; FR-0 REACTOR; REACTOR PHYSICS; REACTIVITY WORTHS; REACTIVITY; CONTROL ELEMENTS; ROD DROP METHOD; ROSSI ALPHA METHOD
OSTI ID:
20949530
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708505
Availability:
Commercial reproduction prohibited; OSTI as DE20949530
Submitting Site:
SWDN
Size:
62 pages
Announcement Date:
Dec 15, 2007

Citation Formats

Hellstrand, E, Andersson, T L, Brunfelter, B, Kockum, J, Londen, S O, and Tiren, L I. Experimental Studies on Assemblies 1 and 2 of the Fast Reactor FR-0. Part 2. Sweden: N. p., 1965. Web.
Hellstrand, E, Andersson, T L, Brunfelter, B, Kockum, J, Londen, S O, & Tiren, L I. Experimental Studies on Assemblies 1 and 2 of the Fast Reactor FR-0. Part 2. Sweden.
Hellstrand, E, Andersson, T L, Brunfelter, B, Kockum, J, Londen, S O, and Tiren, L I. 1965. "Experimental Studies on Assemblies 1 and 2 of the Fast Reactor FR-0. Part 2." Sweden.
@misc{etde_20949530,
title = {Experimental Studies on Assemblies 1 and 2 of the Fast Reactor FR-0. Part 2}
author = {Hellstrand, E, Andersson, T L, Brunfelter, B, Kockum, J, Londen, S O, and Tiren, L I}
abstractNote = {In a first part of this report, published as AE-195, an account was given of critical mass determinations and measurements of flux distribution and reaction ratios in the first assemblies of the fast zero power reactor FR0. This second part of the report deals with various investigations involving the measurement of reactivity. Control rod calibrations have been made using the positive period, the inverse multiplication, the rod drop and the pulsed source techniques, and show satisfactory agreement between the various methods. The reactivity worths of samples of different materials and different sizes have been measured at the core centre. Comparisons with perturbation calculations show that the regular and adjoint fluxes are well predicted in the central region of the core. The variation in the prompt neutron life-time with reactivity has been studied by means of the pulsed source and the Rossi-{alpha} techniques. Comparison with one region calculations reveals large discrepancies, indicating that this simple model is inadequate. Some investigations of streaming effects in an empty channel in the reactor and of interaction effects between channels have been made and are compared with theoretical estimates. Measurements of the reactivity worth of an air gap between the reactor halves and of the temperature coefficient are also described in the report. The work has been performed as a joint effort by AB Atomenergi and the Research Institute of National Defence.}
place = {Sweden}
year = {1965}
month = {Dec}
}