Activity of fuel batches processed through Hanford separations plants, 1944 through 1989

Abstract

This document provides a printout of the "Fuel Activity Database" (version U6) generated by the Hanford DKPRO code and transmitted to the Los Alamos National Laboratory for input to their "Hanford Defined Waste" model of waste tank inventories. This fuel activity file consists of 1,276 records--each record representing the activity associated with a batch of spent reactor fuel processed by month (or shorter period) through individual Hanford separations plants between 1944 and 1989. Each record gives the curies for 46 key radionuclides, decayed t o a common reference date of January 1, 1994.

Hanford defined waste model limitations and improvements

“…The bias in ce~in radlonuclides introduced by the simplified reference 0RIGEN2 setup method has been determined by generating additional 0RIGEN2 fuel activity files with modified fuel compositions, reflecting time-dependent impurity levels . Table D-2 shows the ratio of the radionuclide curie inventories in the revised analysis to the inventories in the reference DKPRO calculations (Watrous and Wootan 1997) for the principal radionuclides affected by impurity concentration changes. The net effect of the time dependant nickel impurity concentration change is a reduction in the 5gNiand 63Niinventories in the firel processed through B, T, and REDOX, but an increase in the inventories in the fuel processed through PUREX.…”

Tank characterization report for single-shell tank 241-SX-106

“…However, this is no longer an issue because headspace vapor (sniff) tests are required for the safety screening DQO , and the toxicity issue was closed for all tanks (Hewitt 1996 (Agnew et al 1997a). The heat load estimate based on the tank headspace temperature was 3,180 W (10,840 Btn/hr) (Kummerer 1995 (Agnew et al 1997a Agnew et al (1997a) Kupfer et al 1997, Section 6.1, andWootan 1997. ) 3-1 (Agnew et al 1997a (Agnew et al 1997a), E =engineering assessment based, and C = calculated by charge balance; includes oxides as hydroxides, not includhg C03, NO,,NO,,PO,,S04,and Si03. January 1, 1994(Effective May31, 1998.…”

Tank Characterization report for single-shell tank 241-SX-103

“…These models estimate radionuclide activity in batches of reactor fuel, account for the split of radionuclides to various separations plant waste streams, and track their movement with tank waste transactions. These computer models are described in , Section 6.1 and in Watrous and Wootan (1997). Model-generated values for radionuclides in any of the 177 Hanford Site tanks are reported in the HDW Rev.…”