closure project manager - Document Request - U.S. Department of ...

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The mission of the Building 991 Complex is to support the receipt, storage, transfer and
shipment of nuclear materials, transuranic (TRU) waste (includes residues considered as waste),
and low-level waste (LLW). The complex mission also includes staging of Category LrlI Special
Nuclear Material (SNMJ for eventual shipment on Safe, Secure, Transports (SSTs). The
complex is operated as a tenant facility for the Building Manager, Rocky Mountain Remediation
Services (RMRS) Radiation Control Technicians (RCTs), and the Alarm Radio Communication
Instrumentation and Equipment (ARCIE) group and includes a metallography laboratory and
nondestructive testing (NDT) activities. The future use of the Building 991 Complex and the
schedule for its eventual demolition can only be stated in generic terms due to the uncertainties
and the range of possibilities for future actions at the Site. It is expected the complex will
continue to perform a landlord function and to serve as a waste storage facility without Resource
Conservation and Recovery Act (RCRA) units @e., no mixed waste storage). The Building 991
Complex storage mission supports the general vision of radioactive waste storage outside of the
main plutonium production buildings and management of radioactive waste from building
decontamination and decommissioning (D&D). Regardless of the rate of execution or funding,
the planned use for the Building 991 Complex, for at least the next four years, is for interim
TRU waste (including residues identified as waste) .and LLW storage. The actual usage of the
complex for storage is dependent on the opening datdrate of disposal at the Waste Isolation Pilot
Plant ONIpP) and the rate of generation from residue stabilization and D&D activities. The
Building 991 Complex will likely be in service as a radioactive waste storage facility until the
last “plutonium” building is demolished and recovered, a new TRU/TRU-Mixed (TRMJ facility
is constructed, or the volume of TRU waste at the Site is less than the TRU capacity of more
advan&eous locations (such as Building 664, Building 440, or Building 906). Also, siting of a
Corrective Action Management Unit (0 at a future date may involve the removal of the
Building 991 Complex (Ref. 4).
Activities conducted in the Building 991 Complex have been grouped into eight types of
activities. This grouping permits performing hazard and accident analyses for each activity. It is
these eight activities that underwent hazard and accident analyses to evaluate the potential for
fire, explosion, spill, criticality and chemical events. The analysis of the Building 991 Complex
activities results in the identification of and defmes the rationale for the facility-level control set
for the continued safe operation of the Building 99 1 Complex.
Paragraphs 1.2.1 through 1.2.8 identify and describe the Building 991 Complex
activities. These activities document those activities authorized prior to preparation and
approval of this FSAR. Any new activity for the facility will be screened in accordance with the
Unreviewed Safety Question (USQ) process to determine whether an existing, analyzed
Building 991 Complex activity bounds the hazards of the new activity. If adequately bounded,
the activity could be authorized from a safety analysis standpoint. If not sufficiently bounded,
the activity must undergo further safety analysis and the authorization basis (AB) must be
updated &e., incorporation of a new Building 991 Complex activity and supporting safety
analysis).
The Building 991 Complex activities are listed alphabetically with brief process
descriptions. Where necessary to understand the process, the process inputs and outputs are
Revision 1-5 Building 99 1 Complex FSAR
Scpkrnber 1999
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