Thoron and Hazards Associated with the Handling of Thorium Compounds; LE THORON ET LES RISQUES ASSOCIES DANS LA MANIPULATION DES COMPOSES DU THORIUM

Technical Report · Sat Oct 31 00:00:00 EST 1959

OSTI ID:4291464

Pradel, J.f Billard, F.

Thoron and its daughters are continually released from thorium compounds, and their radiations present a danger to persons handling the compounds. A study was made of various methods for the determination of thoron in equilibrium with ThA in the air. The danger presented by thoron in the immediate vicinity of Th sources in a plant extracting thorium from uranothorianite ores was evaluated. A comparison was made of a continuous and a discontinuous method for the determination of thoron alone in air. The determination of thoron and radon with a scintillation chamber is described in detail. The evaluation of the dangers associated with the handling of thorium ore and compounds showed that the maximum permissible concentration for thoron in equilibrium with ThA is 10/sup -6/ mu c/cm/sup 3/ and is 10/sup -10/ mu c/cm/ sup 3/ for ThB in equilibrium with its daughters. (J.S.R.)

• Research Organization: Commissariat a l'Energie Atomique, Paris
• NSA Number: NSA-13-006344
• OSTI ID: 4291464
• Report Number(s): A/CONF.15/P/338
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-59
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
AIR
ALPHA DECAY
CONTAMINATION
DECAY
ENVIRONMENT
EQUILIBRIUM
GASES
LEAD 212
MEASURED VALUES
MIXING
PLANNING
POLONIUM 216
PRODUCTION
QUANTITY RATIO
RADIATION DOSES
RADIATION INJURIES
RADIATION PROTECTION
RADIATION SOURCES
RADIATIONS
RADIOACTIVITY
RADON 220
SAFETY
SCINTILLATION COUNTERS
TABLES
THORIUM
THORIUM COMPOUNDS
USES