Actinide Solubility and Speciation in the WIPP [PowerPoint]

Conference · Mon Nov 02 00:00:00 EST 2015

OSTI ID:1225284

Reed, Donald T. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The presentation begins with the role and need for nuclear repositories (overall concept, international updates (Sweden, Finland, France, China), US approach and current status), then moves on to the WIPP TRU repository concept (design, current status--safety incidents of February 5 and 14, 2014, path forward), and finally considers the WIPP safety case: dissolved actinide concentrations (overall approach, oxidation state distribution and redox control, solubility of actinides, colloidal contribution and microbial effects). The following conclusions are set forth: (1) International programs are moving forward, but at a very slow and somewhat sporadic pace. (2) In the United States, the Salt repository concept, from the perspective of the long-term safety case, remains a viable option for nuclear waste management despite the current operational issues/concerns. (3) Current model/PA prediction (WIPP example) are built on redundant conservatisms. These conservatisms are being addressed in the ongoing and future research to fill existing data gaps--redox control of plutonium by Fe(0, II), thorium (analog) solubility studies in simulated brine, contribution of intrinsic and biocolloids to the mobile concentration, and clarification of microbial ecology and effects.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE/LANL
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1225284
• Report Number(s): LA-UR-15-28106; TRN: US1700221
• Resource Relation: Conference: Seminar at Florida International University, Miami, FL (United States), 20 Oct 2015
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
WIPP
PLUTONIUM
THORIUM
CONCENTRATION RATIO
RADIOACTIVE WASTE MANAGEMENT
USA
FINLAND
SOLUBILITY
SWEDEN
FRANCE
SAFETY
ABUNDANCE
CHINA
CONTROL
OXIDATION
RADIATION ACCIDENTS
BRINES
DESIGN
DISTRIBUTION
IRON
SIMULATION
VALENCE
COLLOIDS
MICROORGANISMS
SALT DEPOSITS
Environmental Protection
Actinide