Nuclear Thermal Effects on the Outer Material of the Blast Hardened S-280 Electrical Shelter Wall.
Abstract
Because of the thermal insulating nature of the Kevlar-49 fiber epoxy resin composite material used in the blast hardened S-280 electrical shelter with the blast hardened wall and roof construction of the shelter, the shelter will survive the recommended nuclear thermal radiation levels. However, since the thermal environment precedes the blast environment and the Kevlar material is an integral part of the walls and roof, the blast hardness of the shelter is dependent on the effects of the thermal environment on the exposed Kevlar material. Samples of the Kevlar material were exposed to several simulated nuclear thermal radiation environments. The analysis of the effects of these environments on the material show that the following effects will occur at the recommended thermal hardening level of the shelter: (a) transient flaming of the exposed surface for the duration of the environment, (b) the exposed layer of the multi-layered material will char and break and debond from the adjacent layer, and (c) the maximum increase of the back surface temperature will be less than 108C. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1977
- Accession Number
- ADA042998
Entities
People
- Ennis F. Quigley
Organizations
- Ballistic Research Laboratory