Method for solidifying boron-containing radioactive residues

US4500449A · kind A · utility

Assignee

• Kraftwerk Union Aktiengesellschaft · DE

Inventors

• Klaus Kuhnke · Erlangen, DE
• Dietmar Bege · Erlangen, DE
• Anwer Puthawala · Erlangen, DE
• Gunter Wittrowsky · Erlangen, DE

Key dates

• Filing date: Apr 23, 1982
• Grant date: Feb 19, 1985
• Expiry date: Apr 23, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G21F9/167
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Solidifying radioactive liquid concentrate residues containing borates by embedding in a binder by mixing. Prior to embedding, sodium hydroxide is added to the waste concentrate to obtain a mole ratio of sodium to boron of 0.25 with a corresponding pH value in the range of 7.3 to 8.0 or 0.7 with a corresponding pH value of 9.8 to 10.2. The waste concentrate with added sodium hydroxide is mixed with a binder to embed it into the binder.