skip to main content

SciTech ConnectSciTech Connect

Title: Review of zirconium-zircaloy pyrophoricity

Massive zirconium metal scrap can be handled, shipped, and stored with no evidence of combustion or pyrophoricity hazards. Mechanically produced fine scrap such as shavings, turnings, or powders can burn but are not pyrophoric unless the particle diameter is less than 54 ..mu..m. Powders with particle diameters less than 54 ..mu..m can be both pyrophoric and explosive. Pyrophoric powders should be collected and stored underwater or under inert gas cover to reduce the flammability hazard. Opening sealed containers of zirconium stored underwater should be attempted with caution since hydrogen may be present. The factors that influence the ignition temperature have been explored in depth and recommendations are included for the safe handling, shipping, and storage of pyrophoric or flammable zirconium. 29 refs., 5 figs., 6 tabs.
Authors:
Publication Date:
OSTI Identifier:
5791423
Report Number(s):
RHO-RE-ST-31P
ON: DE85011169
DOE Contract Number:
AC06-77RL01030
Resource Type:
Technical Report
Research Org:
Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ZIRCALOY; COMBUSTION; FLAMMABILITY; IGNITION; MATERIALS HANDLING; ZIRCONIUM; FIRE HAZARDS; PARTICLE SIZE; POWDERS; RECOMMENDATIONS; REVIEWS; SAFETY; STORAGE; SURFACE AREA; ALLOYS; CHEMICAL REACTIONS; COMBUSTION PROPERTIES; DOCUMENT TYPES; ELEMENTS; HAZARDS; METALS; OXIDATION; SIZE; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES; TIN ALLOYS; TRANSITION ELEMENTS; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS 360100* -- Metals & Alloys; 570000 -- Health & Safety