LWR fuel reprocessing and recycle progress report, April 1--June 30, 1976
The presence of water or nitrogen dioxide in an untreated off-gas stream will detrimentally affect the performance of a silver-exchanged zeolite adsorbent. The waste management program is being performed (1) to determine the behavior of LWR liquid wastes during evaporation and storage with regard to solids production, fouling tendencies, and off-gas behavior, and (2) to evaluate materials of construction for process evaporators and waste tanks. Simulated high-level liquid waste (HLLW) solutions were prepared by combining stock solutions to closely approximate the components in actual process waste solutions. Vapor-liquid equilibrium compositions of nitric acid were measured to determine the effect of components in HLLW on the volatilization of HNO/sub 3/. Laboratory evaporations were conducted to determine the physical and chemical properties of HLLW solutions during evaporation. Data are reported for boiling point rise, density, and undissolved solids at varying degrees of concentration. A pilot unit thermosyphon evaporator was designed on the basis of conditions proposed for the HLLW waste evaporator at Barnwell Nuclear Fuel Plant (BNFP) for LWR fuels. The long-term physical characteristics of solids formed in the HLLW solutions are being investigated during storage without agitation at 35/sup 0/. Laboratory corrosion tests are being initiated to determine the effects of waste compositions of materials of construction in evaporators and storage tanks. Materials which have been selected for testing in the reboiler section of the pilot plant evaporator are types 304L, 309S, and 310S stainless steels, titanium, Nitronic-50, Carpenter 329, Sandvik 2 RE 10, and Sandvik 2 RE 69 ELC.
- Research Organization:
- Idaho National Engineering Lab., Idaho Falls (USA)
- DOE Contract Number:
- EY-76-C-07-1540
- OSTI ID:
- 7233242
- Report Number(s):
- ICP-1101
- Country of Publication:
- United States
- Language:
- English
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