Spent Nuclear Fuel (SNF) Project Product Specification

Abstract

This document establishes the limits and controls for the significant parameters that could potentially affect the safety and/or quality of the Spent Nuclear Fuel (SNF) packaged for processing, transport, and storage. The product specifications in this document cover the SNF packaged in Multi-Canister Overpacks to be transported throughtout the SNF Project.

Spent Nuclear Fuel (SNF) Project Canister Storage Building (CSB) Process Flow Diagram Mass Balance Calculations

“…0.06 H2 = X gmol H*/(X gmol Hz + 31.0 gmol He) based on Duncan and Plys (1998) and Pajunen (2000) Mass Hz (X) = 0.06 x 31.0/0. …”

“…Determine mass of H2 in six monitored MCOs at 2.0 yr and no samplingiHe reinerting 0.080 = X Hz/(X H2+31.0 He) based on Duncan and Plys (1998) and Pajunen (2000) 19…”

“…This adjustment is based on radiolysis of the hydrated oxide (See Stream C-12 for description of radiolysis) and helium reinerting. Amount of new U02 produced = 0.06 x 948 kg U02(OH)2/304 g/gmol x 0.5 gmol Odgmol U02(OH)2 x 1 gmol UO2/gmol02 x 270 g U02/gmol= 2.523+01 kg or 6.44E-02 kg/MCO Total U02 in 392 MCOs = 1.24E+02 kg (C-6) + 3.5E+00 kg + 2.52E+01 kg = 1.533+02 kg or 3.90E+01 kg/MCO Amount hydrogen produced = 0.06 x 948 kg U02(OH)2/304 g/gmol x 1 gmol H2/gmol UOz(OH)2 x 2 g Hz/gmol= 3.743-01 kg Total hydrogen produced from radiolysis of Al(OH)3 and U02(0H)2 in 392 direct welded MCOs Amount of H2/MC0 at two y = 0.08 x 3 1.0/0.92 = 2.6963+00 gmol H2/MCO based on Duncan and Plys (1998) and Pajunen (2000) Change of H2 from time zero to two years with correction for decomposition of hydrated oxides = 2.696E+00 gmol-l.978E+00 gmol -5.43E-01 gmol= 1.75E-01 gmol H*/MCO Determine amount of free water equivalent to change of H2 value 1.75E-01 gmol H2 x 1 gmol H2Oigmol H2 x 18 g H*O/gmol= 3.153+00 g H20/MCO Water remaininddirect welded MCO at 2 yr = 1.64E+02 -3.153+00 = 1.61E+02 g Water remaining in 392 direct welded MCOs = 1.61E+02 g/MCO x 392 MCOs = 6.31E+04 g = 6.313+01 kg Amount of hydrogen at two yr in 392 MCOs = 2.696 gmol/MCO x 392 MCOs x 2 g/gmol x 0,001 kg/g = 2.1 1E+00 kg …”

“…The container is not part of the mass balance. Page J-11 of Duncan and Plys (1998) and Table 2-1 of Pajunen (2000) are the source of information for temperature, pressure, and composition of the MCO internal gas.…”

Multi Canister Overpack (MCO) Topical Report [SEC 1 THRU 3]

“…The maximum number of scrap baskets and their position is specified in Sections 3.2.1 and 3.2.2 ofm-SD-SNF-OCD-001 (Pajunen 2000) SARR-005. 12 …”