Accession Number : ADA131177

Title :   Late Time Containment Research.

Descriptive Note : Technical rept.,

Corporate Author : S-CUBED LA JOLLA CA

Personal Author(s) : Duff, R E ; Lie, K ; Barthel, J R ; Rimer, N ; Proffer, W J

PDF Url : ADA131177

Report Date : 01 Jun 1982

Pagination or Media Count : 74

Abstract : This summary of Late-Time Containment Research describes the various tasks undertaken during 1981. Cavity conditions were estimated for Red Hot as a function of time, and consideration of connecting tunnel conditions suggested that venting from the cavity was energetically rather minor. Diablo Hawk diagnostic data permitted the identification of the second LOS flow pulse as steam at a temperature near 3500 deg K. The LOS flow in Miners Iron was found to have a pressure three times higher than on Diablo Hawk. LOS flow studies suggested that aerodynamic forces turn the helical insert into the flow and thereby intercept penetrating flow components. Particle velocity records from grout spheres tests were analyzed to show that the conventional material model for 2C4 grout is unacceptable. Probably strain rate effects, material damage and a relaxation time will be required to give agreement between calculations and the measurements. An algorithm was developed for use in the LANL KRAK code to improve calculations of crack propagation from a cylindrical borehole. This specified how pressure in the borehole should be treated. Several other tasks are discussed briefly. (Author)

Descriptors :   *NUCLEAR EXPLOSION TESTING, *NUCLEAR EXPLOSIONS, CAVITIES, CONTAINMENT(GENERAL), RESIDUAL STRESS, LINE OF SIGHT

Subject Categories : Nuclear Weapons

Distribution Statement : APPROVED FOR PUBLIC RELEASE