NEUTRONIC BENCHMARKING OF SMALL GAS-COOLED SYSTEMS

Neutronic Analysis Studies of the Spallation Target Window for a Gas Cooled Ads Concept

Some design options for transmutation devices are under consideration, one of them includes a window target cooled by eutectic Lead Bismuth for a gas cooled transmutation core. In this paper we will show the neutronic calculations that we have performed to obtain the heat deposition in the target material, the neutron flux produced in the target and the radiation damage in the structural materi...

High Temperature Gas Cooled Reactors

Neutronic Study of Two Reactor Cores Cooled with Light and Heavy Water Using Computation Method

Most HWRs currently use natural uranium fuel. Using enriched uranium fuel results in a significant improvement in fuel cycle costs and uranium utilization. On the other hand, reactivity changes of HWRs over the full range of operating conditions from cold shutdown to full power are small. This reduces the required reactivity worth of control devices and minimizes local flux distribution perturb...

Erbium-Based Gas-Cooled Disk Laser

We report on a novel resonantly-pumped, erbium (Er)-based, gas-cooled disk laser (GCDL) scalable to highaverage power (HAP). The GCDL uses edge-pumped composite laser disks known for their near perfect pump uniformity and compact configuration. Edge pumping enables a long path for pump absorption, which permits using low Er concentration and limits upconversion losses. Resonant operation reduce...

A buffer-gas cooled Bose-Einstein condensate

We report the creation of a Bose-Einstein condensate using buffer-gas cooling, the first realization of BEC using a broadly general method which relies neither on laser cooling nor unique atom-surface properties. Metastable helium (He*) is buffer-gas cooled, magnetically trapped, and evaporatively cooled to quantum degeneracy. 10 atoms are initially trapped, leading to Bose-Einstein condensatio...