Accession Number : AD0640595

Title :   RADIANT EXPOSURES FOR IGNITION OF TINDER BY THERMAL RADIATION FROM NUCLEAR WEAPONS.

Descriptive Note : Final progress rept.,

Corporate Author : NAVAL APPLIED SCIENCE LAB BROOKLYN N Y

Personal Author(s) : Bracciaventi,John ; Heilferty,R. ; Derksen,Willard L.

Report Date : 05 JUL 1966

Pagination or Media Count : 112

Abstract : The radiant exposure to ignite tinder materials for thermal radiation from nuclear weapons was measured. The experiments involved 41 materials commonly encountered in urban areas and are to provide basic data of direct use in the determination of fires caused by nuclear weapons and to provide basic information for ignition prediction models. The radiant exposures for ignition of the most susceptible common material, newspaper (dark picture) ranged from 5.1 cal cm-2 to 31 cal cm(-2) for bursts of 20 kt to 100 Mt respectively. Black roll roofing, a common material representing an important but less susceptible fuel, ignited at 38 cal cm(-2) for a 1 MT pulse and 45 cal cm(-2) for a 10 Mt pulse. Other thin fuels ignited at various intermediate or higher exposures. Thick wood fuels, such as might be used as building siding, were ignited to sustained flaming by the simulated detonation pulses. Cedar shingle was ignited at 15 cal cm(-2) by a 1 MT pulse, and at 26 cal cm(-2) by a 10 Mt pulse. (Author)

Descriptors :   (*NUCLEAR WEAPONS, *THERMAL RADIATION), (*MATERIALS, NUCLEAR WEAPONS), IGNITION, DAMAGE

Subject Categories : Weapons Effects(biological)
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE