131 LA UR 03 5862 - National Nuclear Security Administration ...

2.4.2. Operations at the Pajarito SiteThe SWEIS identified nine capabilities for this Key Facility. No research capabilities have been deleted.However, the Nuclear Measurement School (IAEA classroom returned to CMR) that was originally movedfrom TA-18 to CMR (before the SWEIS), was moved back to TA-18 in 2000 and then returned to CMR in2002.The TA-18 facility experienced a safety stand down on August 12, 1998, that lasted into April 1999. As aresult, only a limited number (54) of criticality experiments were performed during 1998, along with morethan 100 subcritical tests. This total of 154 experiments is approximately a factor of seven below the RODprojection of a maximum of 1,050 experiments in any given year.Since 1999, the facility has experienced normal operations. TA-18 conducted 188 criticality experimentsin 1999 and a total of 140 in both 2000 and 2001. The TA-18 facility experienced normal operationsduring 2002, except for the Solution High-Energy Burst Assembly (SHEBA) critical assembly that was onoperational downtime starting August 2000. SHEBA was restarted in February 2003. The TA-18 facilityconducted 160 criticality experiments in 2002. This total of 160 experiments represents only about 15 percentof the SWEIS ROD projection of a maximum of 1,050 experiments in any given year.In addition, the nuclear material inventory level has remained below the SWEIS ROD projection. For 2002the material inventory was reduced by 10 percent, and there was not a significant increase in nuclear weaponscomponents and materials at the facility. Table 2.4.2-1 provides details.Examining hemispheresSWEIS Yearbook—2002 2-67