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The Darmstadt High-Intensity Photon Setup (DHIPS) for photon-scattering and photodissociation experiments at the superconducting electron linear accelerator S–DALINAC has been improved. We report on its present performance. The developments include the installation of a segmented radiator for an online evaluation of the beam energy and the construction of a second photon-scattering setup with a Clover detector to deduce parity assignments. The enhancement of the existing photon-scattering setup with an additional 100% HPGe detector and some minor changes are described as well as the installation of two setups for photon-induced activation. In addition, we present a comparison of experimental data to Monte Carlo simulations using the codes Geant 3.21 and GEANT4.

This paper will discuss current work associated with the investigation of equipment damage induced by the application of fire suppressants. This discussion will be presented through an examination of several nuclear power plant incidents in which the spurious actuation of one or more fire suppression systems has occurred. The effects of these actuations on plant equipment, systems, and operation will be described. Also presented are the results of scoping calculations of the risk significance of spurious suppression system actuation. Finally, the paper will provide a description of efforts recommended to further investigate the impact of such incidents on plant operations and plant risk.

Use of ethylenediamine (en) and the tripod ligand 1,3-diamino-2-(aminomethyl)propane (daap) results in cobalt(III)-pentamine complexes with obligate configuration. Optimization of the synthesis of [(en)(daap)Co] 2 O 2 4+ suggests that daap must undergo conformational change for complete coordination. Ultraviolet and visible spectra of [(en)(daap)Co] 2 O 2 4+ , [(en)(daap)Co] 2 O 2 5+ , [Co(daap)(enOH] 2+ , and Co-(daap)(en)H 2 O] 3+ are consistent with those of similar complexes. NMR spectra for [(en)(daap)Co] 2 O 2 4+ and for paramagnetic [(en)(daap)Co] 2 O 2 5+ were observed and assigned. The aqueous acidity of the cation [Co(daap)(en)H 2 O] 3+ was obtained at various ionic strengths.