Development Test No. 105-518-SI---Irradiation service request No. 132 low energy neutron flux spectrum in process tubes (open access)

Development Test No. 105-518-SI---Irradiation service request No. 132 low energy neutron flux spectrum in process tubes

None
Date: March 5, 1954
Creator: Marshall, R. K.
System: The UNT Digital Library
Final report for Process Test MR-105-4 -- Radiation effects of the removal of front cap supported shielding slugs (open access)

Final report for Process Test MR-105-4 -- Radiation effects of the removal of front cap supported shielding slugs

Corrosion of aluminum front cap supported shielding slugs has been noted at all reactors except C Reactor which has galvanized shielding pieces. There has been a considerable amount of difficulty caused by sticking of the places. The difficulty is caused by the growth of corrosion products in the annulus around the shielding piece which affectively siezes it. As recently as June, 1953 the shielding pieces on nearly 50 per cent of a group of 40 tubes at B Reactor were corroded to the extent that a pipe wrench was required for their removal. Similar instances, to varying degrees, have occurred at all reactors except C.The purpose of this test was to evaluate the radiation affects of removing the front shielding pieces as part of a program to eliminate the sticking problem.
Date: March 5, 1954
Creator: Bloomstrand, R. R.
System: The UNT Digital Library
Process test MR-105-25 reactor purge at low concentrations (open access)

Process test MR-105-25 reactor purge at low concentrations

None
Date: November 5, 1954
Creator: unknown
System: The UNT Digital Library
Quarterly report, physics unit, January, February, March, 1954 (open access)

Quarterly report, physics unit, January, February, March, 1954

A new method of calculating neutron distributions in a cylinder which has appreciable absorption is described. Measurements and calculations on the small-source theory treatment of resonance absorption in U-238 are given. Experimental measurements are reported of the bucklings of lattices utilizing hollow uranium slugs. The effects of varying amounts of cooling water in a graphite-uranium lattice have been measured. A detailed mathematical fitting of experimental reactivity data has been started; some initial results are given here. Curves showing the periods of the lattice testing reactor under various conditions have been calculated in connection with a study of the nuclear safety of this reactor. A method for calculating the critical mass and an estimate (4.4 kg of-U-235) thereof is presented. A technique for measuring the conversion efficiency for U-233 production of Hanford-type lattices is being developed. In connection with the study of the temperature coefficient of reactivity, an analysis has been made of the errors in reactivity change estimates produced by errors in cross-section measurements. The dependence of Pu-240 content in product plutonium on the flux level at which irradiation takes place, which is produced by the 23-day half life of Np-239 is worked out in some detail. An experiment for …
Date: April 5, 1954
Creator: unknown
System: The UNT Digital Library