Open AccessMCO gas composition for low reactive surface areas
Author(s) -
M Packer
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/344997
Subject(s) - overpressure , scrap , cabin pressurization , environmental science , interim , rod , gas phase , waste management , helium , nuclear engineering , materials science , chemistry , engineering , composite material , thermodynamics , physics , metallurgy , geography , organic chemistry , medicine , alternative medicine , archaeology , pathology
This calculation adjusts modeled output (HNF-SD-SNF-TI-040, Rev. 2) by considering lower reactive fuel surface areas and by increasing the input helium backfill overpressure from 0.5 to 1.5 atm (2.5 atm abs) to verify that MCO gas-phase oxygen concentrations can remain below 4 mole % over a 40 year interim period under a worst case condition of zero reactive surface area. Added backfill gas will dilute any gases generated during interim storage and is a strategy within the current design capability. The zero reactive surface area represents a hypothetical worst case example where there is no fuel scrap and/or damaged spent fuel rods in an MCO. Also included is a hypothetical case where only K East fuel exists in an MCO with an added backfill overpressure of 0.5 atm (1.5 atm abs)