RESEARCH AND DEVELOPMENT OF AN AUTOMATIC BERYLLIUM AND BORON MONITOR.
Abstract
The design, construction, and final testing of a prototype borane monitor were completed. Detection of boranes in air is based upon the flame emission of boron in a hydrogen-air flame. Sensitivity is in the 50-ppb range. The protoype has ranges of 0 to 2, 0 to 13, and 0 to 60 ppm. Ammonia and hydrazine interfere to the extent that 250 and 360 parts of these, respectively, produce the same effect as 1 part of pentaborane. The borane monitor is portable and is capable of independant operation for approximately 9 hr. The design, construction, and final testing of a prototype beryllium monitor were completed. Detection is based upon the reaction of beryllium with highenergy alpha particles. Beryllium is deposited onto the surface of a filter tape which passes through a detection chamber. Counting rate data from the Be9 (alpha, eta, gamma) C12 reaction are used in two alarm circuits which are activated at two beryllium concentrations. The instrument is capable of sensing 0.25 to 0.5 micrograms of beryllium. It is line operated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 08, 1962
- Accession Number
- AD0608438
Entities
People
- R. S. Braman
Organizations
- IIT Research Institute