ML13309A988
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ENCLOSURE 2 ATTACHMENT 2 SHINE MEDICAL TECHNOLOGIES, INC.
SHINE MEDICAL TECHNOLOGIES, INC. APPLICATION FOR CONSTRUCTION PERMIT RESPONSE TO ENVIRONMENTAL REQUESTS FOR ADDITIONAL INFORMATION CALC-2013-0005, REVISION 0 ANNUAL RELEASE OF NOX GAS AND SULFURIC ACID 3 pages follow
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Calculation number CALC-2013-0005 Page l1
- 1. Introduction In the Spring of 2013, SHINE Medical Technologies, Inc. submitted an Environmental Report to the NRC as part of an application for a construction permit for a radioisotope production facility. The NRC has issued a request for additional information on annual amounts of sulfuric acid and NOx gases expected to be released (NRC Air Quality Request #2 and Human Health/Waste Management Request #5).
- 2. Purpose To calculate a bounding level of release for the sulfuric and NOx gases from the SHINE isotope production process.
- 3. Scope The scope of these calculations is limited to the SHINE isotope production process. It does not include emissions from facility boilers or other sources of NOx gases.
- 4. Design Inputs Values for the amounts of sulfate and nitrate used in the target solution preparation, thermal denitration (TDN) operations and other operating conditions are taken from technical reports by Argonne National Labs and the SHINE Preliminary Design Report.
- 5. Assumptions The following assumptions are the basis for these calculations:
x Only free sulfate (not bound to uranyl) is free to escape the target solution.
x Sulfate species at the pH of the alkaline mist in the process vessel vent system (PVVS) have a negligible vapor pressure and do not contribute to potential gaseous effluents.
x Vapor pressure of sulfuric acid under our operations is less than 0.001 Torr (refs. 3 & 4) as SO3, 80 g/mol.
x SO3 will have ideal gas behavior.
x 8 TSVs (target solution vessels) operating for 50 weeks out of the year.
x UREX process (target solution cleanup) will be done after every
[ Proprietary Information ] irradiations.
x UREX process will be performed at a pH of 0 adjusted to 1 Molar nitric.
x NOx gas is produced by the TDN process after the UREX process and consists of NO and NO2.
x Worst case scenario, on a mass basis, for NOx is NO2, 46 g/mol.
- 6. References
- 1. Letter Report Final FY-12 Progress Report on the Cleanup of Irradiated 130 g-U/L Uranyl Sulfate SHINE Target Solution Del Bowers and George Vandegrift, Argonne National Labs, September 2012
- 2. Letter Report Van de Graff Radiolysis Test Chemerisov et. al., Argonne National Labs, September 2012
- 3. Journal of Chemical & Engineering Data, vol 56, pp 963-977 (2011)
- 4. Geophysics Research Letters, vol 7 pp 433-436 (1980) Ayers, GP
- 5. Preliminary Design Report, Revision A, S&L Report Number SL-011815, April 25, 2013
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Security Related Information - Withhold Under 10 CFR 2.390 Calculation number CALC-2013-0005 Page l2
- 7. Methods Calculations were performed using the ideal gas law and chemical balancing methods.
- 8. Calculations and Results NOx Release Calculation NOx calculation is for plant start-up and TDN process.
Plant Start-up release:
12 moles 2L solution [ Proprietary Information ] = [ Proprietary Information ]
nitric [ Security-Related [ Security-Related Information ] L Information ] Kg U HNO3 per batch L solution Kg of U batch Notes:
x See reference 5, Attachment 9.4.32, page 10.
x 1 mol of nitric will yield 1 mol of nitrogen dioxide.
x 1 batch per TSV.
[ Proprietary Information ] 12 46 g 1 lb = [ Proprietary Information ]
[ Security-Related Information ] L mol [ Security-Related Information ] lbs NO2 batch L mol 453.6 g TSV
[ Proprietary Information ] 8 TSVs = [ Proprietary Information ]
[ Security-Related Information ] lbs [ Security-Related Information ] lbs TSV NO2 on start up From thermal denitration process:
1.55 Mol [ Proprietary Information ] L 46 g 1 lb = [ Proprietary Information ] lbs nitric target soln NO2 NO2 per TDN op L target TSV mol 453.6 g soln Notes:
x Thermal denitration is done on one target solution batch at a time x 1.55 mol nitric liter from 0.55 molar uranyl nitrate adjusted to pH 0 with nitric
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Security Related Information - Withhold Under 10 CFR 2.390 Calculation number CALC-2013-0005 Page l3
[ Proprietary Information ] lbs 8 [ Proprietary Information ] = [ Proprietary Information ] lbs NO2 TSVs UREX ops 1st year NO2 from TDN 1st year UREX op
[ Proprietary Information ] lbs NO2 from UREX +
[ Proprietary Information ] [ Security-Related Information ] lbs NO2 from start-up =
[ Proprietary Information ] [ Security-Related Information ] lbs nitric oxide released annually.
The PSAR/ER value in Table 19.4.2-1 of 6000 lbs per year is bounding.
SOx Release Calculation Sulfuric acid (H2SO4) is in equilibrium with water and sulfur trioxide (SO3); it is the sulfur trioxide species in the vapor phase under the conditions of the SHINE plant design. Under those conditions the sulfur trioxide will behave like an ideal gas.
PV = nRT; n = PV/RT (ideal gas law) n = (0.001 Torr
- 40L)/(62.36 LTorr/molK
- 338K) = 1.9 X 10-6 mol SO3 in TSV headspace 1.9 X 10-6 mol SO3 80 grams SO3 1 lb = 3.35 X 10-7 lbs SO3 in TSV TSV mol SO3 453.6 g headspace per batch 3.35 X 10-7 lb 8 TSVs 50 batches = 1.34 X 10-4 lbs TSV year SO3 per year Due to the extremely low vapor pressure of sulfuric acid (and equilibria species), less than one pound per year will be released from the TSVs. PSAR/ER value in Table 19.4.2-1 of 50 lbs per year is bounding.
Notes:
x Experimental results from National labs and published data show sulfate is stable, even under irradiation conditions (See refs. 1 & 2).
x Target solution preparation and holding tanks are at room temperature, where vapor pressure from sulfate species is less than 0.001 Torr. Regardless, they are vented to the process vessel vent system (PVVS) where the H2SO4/SO3 vapors will be knocked down with alkaline mist putting them in the liquid phase at a pH where they will not escape to the vapor phase preventing them from becoming a gaseous effluent.
- 9. Conclusions The release of NOx gases on an annual basis is less than 6000 lbs and of sulfuric less than 50 lbs.