Session: HT-02-01 Impulsively Loaded Vessels

Paper Number: 124096

124096 - Qualification of an Impulsively-Loaded Confinement Vessel for Proton Radiography of Small-Scale Shock Physics Experiments 

An impulsively-loaded high-pressure confinement vessel is designed and fabricated to confine the detonation of high explosives (HE) of up to 30 g TNT equivalent. The confinement vessel will enable  proton radiography and photon Doppler velocimetry of small-scale shock physics experiments at Los Alamos National Laboratory (LANL). These unique physics experiments provide valuable experimental data to characterize materials under extreme loading conditions.

The confinement vessel is designed to the ASME Boiler and Pressure Vessel Code, Section VIII, Division 3 (2015), Code Case 2564-4. The confinement boundary meets the intent of the Code while allowing for maximum resolution of proton radiography across a sufficiently large field of view. We present the overview of all analyses and tests necessary to qualify this pressure vessel. The engineering analyses required by the Code are as follows:

·       Hydro-dynamic analysis of Blast Loading

·       Structural dynamic analysis for impulsive load

·       Fracture/Fatigue Analysis

·       Calculation of post detonation quasi-static pressure

·       Structural analysis for static load including quasi-static pressure.

Following manufacture, each vessel body will be hydrostatically tested to 125% of the nominal quasi-static pressure, and test records will be included with the delivered lot of vessel bodies.  Finally, a single HE overpressure test (OPT) will be conducted for 125% design impulse load, per 3.2 of ASME Code Case 2564-4, ‘Experimental Design Verification’ for the design of diagnostic covers and instrument penetrations from materials not permitted by Part KM.

The design of the confinement vessel is modular, as it allows exchanging the radiographic windows (and other components in the field of view of the proton beam) to achieve optimal imaging resolution for a given class of physics experiments. Two sets of radiographic windows are designed and fabricated, one set for 30g TNTeq and the other for a very small HE load of only 3g TNTeq (but with windows placed closer to the HE compared to the 30g configuration). One HE OPT will be conducted for each of the two configurations.

Presenting Author: Matthew Lakey Los Alamos National Laboratory

Presenting Author Biography: Matthew Lakey is an R&D engineer at Los Alamos National Laboratory. Matthew has worked on Dusan Spernjak's team at LANL since 2019, in the area of impulsively loaded pressure vessels. He holds MS in Mechanical Engineering from UC Irvine, 2023.

Authors:

Dusan Spernjak Los Alamos National Laboratory
Joshem Gibson Los Alamos National Laboratory
Matthew Fister Los Alamos National Laboratory
Devin Cardon Los Alamos National Laboratory
Kevin Fehlmann Los Alamos National Laboratory
Matthew Lakey Los Alamos National Laboratory
Heidi Reichert Los Alamos National Laboratory
Thomas Venhaus Los Alamos National Laboratory