The current-revision of the Process Optimization Program contains two empirical plutonium-exposure expressions. One relates total Pu conversion to exposure and the other, Pu-240 buildup to exposure. The former was incorporated to save computer time and the latter to provide product quality data. Both of these relationships, in addition to a third which relates Pu-241 buildup to exposure, are used in PULP-3, the data generator for LP-90. EMCON-3, a 7090 computer program which determines arbitrary constants for all three empirical expressions, has been devised. It uses, as input, official conversion data and will facilitate rapid evaluation of the effect, of periodic revisions in official conversion data, changes in reactor loadings, and/or changes in product specification. This document contains a discussion of the empirical expressions, the program mechanics, and program input/output. A Fortran listing of the program logic a deck assembly diagram, and sample program output are included in the appendix to aid the reader in using and/or revising the program.

This report details activities of the N-Reactor Department during the month of November 1963.

Experiments on betatron oscillation frequency, beam life times, multiturn injection, longitudinal bunching, acceleration through the transition energy, energy spread in the accelerated beam, beam stacking procedures, effects of clearing neutralizing ions away from the stacked beam, and instability of the stacked beam are reported. (D.C.W.)

The use of digital computational techniques in the design of a 200-Mev standing-wave proton linear accelerator for use as an injector for a 12.5 Bev FFAG accelerator is described. A field computational program that permitted evaluation (optimization) of the r-f structure cost for a given accelerator design is described, and typical results are shown. A particle dynamics program is also described (D.C.W.)

This report details activities of the N-Reactor Department during the month of August 1963.

The report is divided into: Present reactor fuel production, N-RD production fuels, N-fuel development, and current reactor fuel development.

The Irradiated Rupture Prototype (IRP) has been used for rupture testing irradiated NPR prototype fuel elements. Most of the tests have been made to determine the rupture effect of different reactor exposures, fuel element geometries and water cooldown rates following the start of the rupture. This report summarizes the results obtained to date, mentions where information is lacking and gives further tests scheduled for the IRP.

This document outlines preliminary questions related to the study of producing small amounts of by-product tritium in selected control rods at the Hanford reactors. A list of questions to be forwarded to personnel at the Savannah River Plant is given. The questions pertain to the cost per pound of lithium-aluminum alloy enriched with Li{sup 0}, the extraction cost per gram of tritium, and the maximum element size which can be processed without substantially changing the configuration of the extraction system.

Two models of a liquid-hydrogen (?-illegible) Cherenkov counter (illegible) been constructed (illegible). The first served as a prototype (?-illegible) and was (illegible) to demonstrate the feasibility (?-illegible) of the (illegible) concept (?-illegible) (illegible) liquid hydrogen does not give scintillation (?-illegible) (illegible) that of Cherenkov light. The second, final version (?-illegible), (illegible) in an experiment (?-illegible) in which particles brought to rest (?-illegible) (illegible) (illegible) electrons. In this second counter, the efficiency (?-illegible) (illegible) relativistic (?-illegible) particles (?-illegible) by their Cherenkov radiation in liquid hydrogen (?-illegible) was measured by stopping (illegible) mesons in the hydrogen and detecting their decay electrons outside (?-illegible) of the flask (?-illegible) after a suitable time delay. An average detection (?-illegible) efficiency (?-illegible) of 75% (?-illegible) was (illegible) taken over the volume of the hydrogen (?-illegible).