HFIR Dissolution Nuclear Criticality Analysis Information

Technical Report · Thu Sep 11 04:00:00 EDT 2014

DOI:https://doi.org/10.2172/1214190· OSTI ID:1214190

Williamson, Brittany M. ^[1]

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1. Savannah River Site (SRS), Aiken, SC (United States); Savannah River National Laboratory (SRNL), Aiken, SC (United States)

H-Canyon Nuclear and Criticality Safety Engineering has completed development of the documentation necessary to complete the September 30, 2014, H-Canyon PBI milestone that states: Complete the analytical work to develop proposed HFIR Criticality Safety Limits associated with receipt and dissolving of HFIR material. Attached to this memorandum are the following: (1) Attachment 1- HFIR Dissolution Nuclear Criticality Analysis; (2) Attachment 2 - SCALE 5/KENO VI sample input As documented in Attachment 1, the safety of HFIR dissolution in H-Canyon has been evaluated. Due to the composition and geometry of the HFIR elements and the chemistry of the dissolution process, there are no credible criticality events associated with HFIR dissolution, with the exception of potential Pu polymerization. There are no mass, concentration, or soluble poison CSLs required for HFIR dissolution in H-Canyon. If SRNL, in the development of the HFIR flow sheet, determines that Pu polymerization is a credible event, a minimum nitric acid PPL and controls will be developed. However, there is no analysis or CSLs needed for this event. The boron in the borated stainless steel posts is not required, and, therefore, blackness testing is not required for criticality safety.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• Sponsoring Organization: USDOE Office of Environmental Management (EM)
• DOE Contract Number: AC09-08SR22470
• OSTI ID: 1214190
• Report Number(s): SRNS--STI-2015-00459; SRNS--H8200-2014-00021
• Country of Publication: United States
• Language: English

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