The Effects of Varying Fresh Water Discharge on Dispersion in an Estuarine Hydraulic Model of the Lafayette River, Norfolk, Virginia

Three experimental tests were conducted in the Lafayette River branch of the Chesapeake Bay Hydraulic Model, each successive test with an increase in the amount of fresh water discharged into the head of the river. This was done to study the response from varying river discharge on mixing parameters including the longitudinal dispersion coefficient (E). The model generated a tide of constant range and period. Batch releases of Rhodamine WT dye were made in the model and sampled throughout the river for ten tidal cycles. Samples were taken simultaneously at selected high and low water slack. The calculation of the Estuary Number, Estuarine Richardson Number, and the Hansen-Rattray Model showed that the degree of stratification increased with fresh water discharge. The results showed good agreement between experimental and theoretical results. There is evidence from the experimental data showing that trapping of dye in side embayments could be a major mechanism for estuarine mixing. Three methods were used to calculate the slack water approximation of the longitudinal dispersion coefficient. The salinity intrusion method showed that E varied directly with increased discharge. The dynamic relationship method had only a slight increase for the low water slack approximation. The change in moment method displayed irregular results. The values were not in good agreement for the different methods. Half-life values were calculated from the total dye mass and the maximum dye concentration. No difference was found in the half-life values for the low and medium discharge runs, but a substantial decrease in time for the high discharge run

Léonce et Léna, produit par le Théâtre National de la Communauté Française de Belgique

Le Théâtre National de la Communauté française de Belgique, invité par le C.D.N. et l'Espace Scène Planoise de Besançon, a présenté du 17 au 19 décembre 1992 Léonce et Léna de Georg Büchner.La mise en scène de la pièce, remarquable à bien des égards, illustre cependant de manière exemplaire à quel point cette « comédie », en dépit des apparences, est une œuvre difficile à manier. Un travail rigoureux Le spectacle est à coup sûr le fruit d'un travail rigoureux sur le texte qu'il s'attache mani..

A la recherche du désir perdu : Der Park de Botho Strauss

Le Parc à Berlin Acte I, scène 3 : Titania (Jutta Lampe) et Oberon (Bruno Ganz), deux divinités envoyées sur terre pour réapprendre le désir aux hommes Der Park est la sixième pièce de Botho Strauss. Elle a constitué sans conteste l'événement de la saison 1984-85 en Allemagne fédérale. Peter Stein, à qui il l'a dédiée, devait être le premier à la monter à la Schaubühne de Berlin, mais l'accident survenu à un acteur au cours d'une répétition l'obligea à différer la date de la première, qui eu..

Voyage au bout de l’ennui : Léonce et Léna de Georg Büchner

Une drôle de comédie Léonce et Léna, avec La Mort de Danton et Woyzeck, l'une des trois pièces qui composent l'œuvre dramatique de Georg Büchner, est d'un accès malaisé car elle se dissimule derrière un masque : elle se donne l'allure avenante d'une comédie un peu féerique où le hasard fait trop bien les choses, mais derrière cette façade se précise en réalité au fil des scènes une sensibilité d'une grande richesse et c'est elle qui fait de cette comédie en trompe-l’œil une œuvre profonde et ..

Visiteurs

« Enchanté de vous connaître… » Visiteurs, une féérie réaliste de Botho Strauss créée par le CDN de Franche-Comté. Mise en scène René Loyon, Michel Didym. 8 mai 1994 « Je ne sais pas si vous vous souvenez de moi… » Mise en scène à Munich de Dieter Dorn – 1988. Max et Karl Joseph (Axel Melberg et Heinz Bennent) en cours de répétition. VISITEUR : Personne qui visite un lieu.« Les visiteurs sont priés de s’adresser au guide. »V. Touriste, voyageur. (Le Petit Robert) VISITEURS, en allemand BESUC..

Botho Strauss traduit en français

CHŒUR FINAL (traduction Joël Jouanneau et Nicole Roethel), Arche, 1993 COUPLES-PASSANTS (traduction Claude Porcell), Gallimard, 1983 (Collection : Du monde entier) LA DEDICACE (traduction Claude Porcell), Gallimard, 1980 (Collection : Du monde entier) GRAND ET PETIT (traduction Jean Launey), Gallimard, 1980 (Collection : Du monde entier) LE JEUNE HOMME (traduction), Gallimard, 1986 (Collection : Du monde entier) KALLDEWEY, FARCE (traduction Patrick Demerin), Gallimard, 1988 (Collection : Le M..

Chronologie

1813 Naissance de Richard Wagner, Otto Ludwig, Friedrich Hebbel, Soeren Kierkegaard, Guiseppe Verdi, et – le 17 octobre de Georg Büchner, fils ainé du médecin Ernest Charles Büchner à Goddelau (Hesse) et de sa femme, Louise Caroline Reuss. 1825-31 Georg Büchner est l'élève du Ludwig-Georg Gymnasium à Darmstadt, l'année scolaire commençant à Pâques (Directeur, depuis 1826 : Charles Dilthey). 1831-33 Premier séjour à Strasbourg. Etudes de médecine (immatriculation le 9 novembre). Büchner est lo..

Chronologie

2.12.1944 : Naissance de Botho Strauss à Naumburg/Saale (ex RDA). Etudes secondaires au lycée de Remscheid (Ruhr) et de Bad Ems (Hesse). Etudes supérieures (5 semestres) à Cologne et Munich (Germanistique, Histoire du Théâtre, Sociologie). Botho Strauss commence une thèse sur Thomas Mann et le théâtre. Il joue dans des troupes d'amateurs. 1967-1970 : Collabore comme rédacteur et critique à la revue de théâtre ouest-allemande Theater heute 1970 : Peter Stein, qui dirige à Berlin-Ouest le théât..

ALARA Controls and the Radiological Lessons Learned During the Uranium Fuel Removal Projects at the Molten Salt Reactor Experiment

The removal of uranium-233 (233 U) from the auxiliary charcoal bed (ACB) of the Molten Salt Reactor Experiment (MSRE), performed from January through May 2001, created both unique radiological challenges and widely-applicable lessons learned. In addition to the criticality concerns and alpha contamination, 233U has an associated intense gamma photon from the cocontaminant uranium-232 (232U) decaying to thallium-208 (208Tl). Therefore, rigorous contamination controls and significant shielding were implemented. Extensive, timed mock-up training was also imperative to minimize individual and collective personnel exposures. Back-up shielding and containment techniques (that had been previously developed for defense in depth) were used successfully to control significant, changed conditions. Additional controls were placed on tests and on recovery designs to assure a higher level of safety throughout the removal operations. This paper delineates the manner in which each difficulty was solved, while relating the relevance of the results and the methodology to other projects with high dose-rate, highly-contaminated ionizing radiation hazards. Because of the distinctive features of and current interest in molten salt technology, a brief overview is provided. Also presented is the detailed, practical application of radiological controls integrated into, rather than added after, each evolution of the project--thus demonstrating the broad-based benefits of radiological engineering and ALARA reviews. The resolution of the serious contamination-control problems caused by unexpected uranium hexafluoride (UF6) gaseous diffusion is also explicated. Several tables and figures document the preparations, equipment and operations. A comparison of the pre-job dose calculations for the various functions of the uranium deposit removal (UDR) and the post-job dose-rate data are included in the conclusion

Waste Stream Generated and Waste Disposal Plans for Molten Salt Reactor Experiment at Oak Ridge National Laboratory

The Molten Salt Reactor Experiment (MSRE) site is located in Tennessee, on the U.S. Department of Energy (DOE) Oak Ridge Reservation (ORR), south of the Oak Ridge National Laboratory (ORNL) main plant across Haw Ridge in Melton Valley. The MSRE was run by ORNL to demonstrate the desirable features of the molten-salt concept in a practical reactor that could be operated safely and reliably. It introduced the idea of a homogeneous reactor using fuel salt media and graphite moderation for power and breeder reactors. The MSRE reactor and associated components are located in cells beneath the floor in the high-bay area of Building 7503 (Figure 1). The reactor was operated from June 1965 to December 1969. When the reactor was shut down, fuel salt was drained from the reactor circuit to two drain tanks. A ''clean'' salt was then circulated through the reactor as a decontamination measure and drained to a third drain tank. When operations ceased, the fuel and flush salts were allowed t o cool and solidify in the drain tanks. At shutdown, the MSRE facility complex was placed in a surveillance and maintenance program. As a result of the S&M program, it was discovered in 1994 that gaseous uranium (233U/232U) hexafluoride (UF6) had moved throughout the MSRE process systems. The UF6 was generated when radiolysis of the fluorine salts caused the individual constituents to dissociate to their component atoms, including free fluorine.Some of the free fluorine combined with uranium fluorides (UF4) in the salt to form UF6. UF6 is gaseous at slightly above ambient temperatures; thus, periodic heating of the fuel salts (which was intended to remedy the radiolysis problems) and simple diffusion had allowed the UF6 to move out of the salt and into the process systems of MSRE