This report is the second amendment to the Preliminary Hazards Summary Report for the Dresden Nuclear Power Station (GEAP-1044) submitted to the United States Atomic Energy Commission on September 3, 1957.

Existing experimental information about the nucleon-anitnucleon interaction is reviewed, and a description is given of a theoretical model, based on the Yukawa theory, which seems able to explain the experimental results.

Abstract: An analysis and a summary are.given of the radioactivity buildup program at the Army Package Power Reactor during the last nine months. · Due to the wide fluctuation of water and crud results, only general interpretations can be made with this data. Metal test coupon data indicate a substantially greater buildup on Croloy 16-1 metal than on Type 304 stainless steel. Coupled with the decreased ability to remove the radioactivity buildup on Croloy 16-1 by conventional descaling techniques, the implication is that this metal might pose a serious problem for use as steam generator material. It was emphasized, however, that results to date ae only preliminary and extensive additional experimentation would be required to reach more definite conclusions.

The following document is a bibliography containing a collection of documents discussing natural steam and geothermal power generation.

The following report records measurements and evaluations of fast neutron levels in remote areas monitored by personnel.

Summary: The radiations emitted in the spontaneous fission of Cf²⁵² have been studied. The results in general are in agreement with other similar measurements. An experiment is described which is expected to give the neutron energies and angular distribution in the center-of-mass system of the moving fission fragment when the analysis is completed.