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Title: THE LID TANK SHIELDING FACILITY AT OAK RIDGE NATIONAL LABORATORY. PART II. DETERMINATION OF THE FISSION RATE OF THE SOURCE PLATE

Abstract

BS>Following the installation of the second Lid Tank Shielding Facility source plate, a thin uranium disk identified as SP-2, a series of experiments were performed to determine its fission rate. Three independent methods were used one based on the rate of absorption of the thermal neutrons incident on the plate, another based on the rate of fast-neutron production within the plate, and a third one based on the power dissipation within the plate. Discussions of the methods, all of which yielded consistent results, are presented, along with a description of the source plate. A weighed average of the fission rates determined by the three methods gave a result of 1.66 x 10/sup 11/ fissions/sec plus or minus 5% for the standard incident thermal-neutron flux. With an assumed energy dissipation of 200 Mev/fission a typical reactor having tbis fission rate would release 5.22 watts of heat power. The calibration of the SP-2 allowed a re-evaluatjon of the power of the first LTSF source plate, the SP-1. The revised effective'' neutron power for SP-1 is 1.7 watts plus or minus 11%. (auth)

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab., Tenn.
OSTI Identifier:
4260525
Report Number(s):
ORNL-2350
NSA Number:
NSA-13-018236
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
PHYSICS AND MATHEMATICS; ABSORPTION; ENERGY; FISSION; LOSSES; NEUTRON FLUX; NEUTRONS; PLATES; POWER; PRODUCTION; QUANTITATIVE ANALYSIS; RADIATION SOURCES; REACTORS; SHIELDING; STANDARDS; TEMPERATURE; URANIUM; VESSELS

Citation Formats

Otis, D. R. THE LID TANK SHIELDING FACILITY AT OAK RIDGE NATIONAL LABORATORY. PART II. DETERMINATION OF THE FISSION RATE OF THE SOURCE PLATE. United States: N. p., 1959. Web. doi:10.2172/4260525.
Otis, D. R. THE LID TANK SHIELDING FACILITY AT OAK RIDGE NATIONAL LABORATORY. PART II. DETERMINATION OF THE FISSION RATE OF THE SOURCE PLATE. United States. https://doi.org/10.2172/4260525
Otis, D. R. Sat . "THE LID TANK SHIELDING FACILITY AT OAK RIDGE NATIONAL LABORATORY. PART II. DETERMINATION OF THE FISSION RATE OF THE SOURCE PLATE". United States. https://doi.org/10.2172/4260525. https://www.osti.gov/servlets/purl/4260525.
@article{osti_4260525,
title = {THE LID TANK SHIELDING FACILITY AT OAK RIDGE NATIONAL LABORATORY. PART II. DETERMINATION OF THE FISSION RATE OF THE SOURCE PLATE},
author = {Otis, D. R.},
abstractNote = {BS>Following the installation of the second Lid Tank Shielding Facility source plate, a thin uranium disk identified as SP-2, a series of experiments were performed to determine its fission rate. Three independent methods were used one based on the rate of absorption of the thermal neutrons incident on the plate, another based on the rate of fast-neutron production within the plate, and a third one based on the power dissipation within the plate. Discussions of the methods, all of which yielded consistent results, are presented, along with a description of the source plate. A weighed average of the fission rates determined by the three methods gave a result of 1.66 x 10/sup 11/ fissions/sec plus or minus 5% for the standard incident thermal-neutron flux. With an assumed energy dissipation of 200 Mev/fission a typical reactor having tbis fission rate would release 5.22 watts of heat power. The calibration of the SP-2 allowed a re-evaluatjon of the power of the first LTSF source plate, the SP-1. The revised effective'' neutron power for SP-1 is 1.7 watts plus or minus 11%. (auth)},
doi = {10.2172/4260525},
url = {https://www.osti.gov/biblio/4260525}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {8}
}