Modifications consisted of redesigning the feedback loop and shielding the toroid to minimize capacitive pickup and of insulating the core from the magnet buss. A system analysis is presented, and system controls and operation are described. Operational properties of the redesigned loop and tests on the insulation between the grounded Faraday shield and the magnet buss and core are discussed. (D.C.W.)

None

A letter dated June 3, 1963 to W, E. Johnson, General Manager, Hanford Atomic Products Operation, from J. E. Travis, Manager, Richland Operations Office requested an updated study on the expected life of existing production reactors similar to Sections II, III and IV of document HW-59000. This study covers the ten year period to FY 1973 as the previous study document covered the ten year period FY 1958 to Fy 1968. In Section II, production has been forecast for the existing plant with no improvements beyond the current program for installation of zirconium process tubes in the K Reactors. Section III contains estimates of additional production from the six smaller reactors made possible through overboring the process channels and retubing with zirconium plus the associated water plant expansions. Section IV presents our analysis of the assurance which can reasonably be assigned to the predictions of Sections II and.III. The production forecasts have been prepared from the same base as the current production studies and have been developed within the technical limits listed later in the report,