CSER 79-028, Addendum 2: Security bar addition to pedestal storage racks in Room 3 in 2736-Z Building

Technical Report · Fri Nov 18 00:00:00 EST 1994

DOI:https://doi.org/10.2172/10104913· OSTI ID:10104913

Miller, E M

The Plutonium Finishing Plant (PFP) is installing security bars on plutonium storage racks in Room 3 in 2736-Z Building to meet International Atomic Energy Agency (IAEA) material control requirements. Figures show the existing arrangement and design of the security bars. The security bars are to be fabricated of aluminum or carbon steel. The detailed fabrication sketches are reproduced in Appendix C. The security bars are to be installed close to the chains of plutonium so a determination of their effect on criticality safety needs to be made. The addition of security bars to the storage array of 2.5 kg plutonium buttons in Room 3 can effect reactivity by reflecting neutrons back into the plutonium in the storage cans, by absorbing neutrons, and by moderating neutrons between stored plutonium buttons. The small amount of metal added by the storage bars in comparison to the amount of concrete in the walls and aluminum in the shelf monitors already in place would not significantly increase the k{sub eff} of the storage array. Several computer calculations in previous analyses show that the security bars will have a negligible affect on reactivity.

• Research Organization: Westinghouse Hanford Co., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-87RL10930
• OSTI ID: 10104913
• Report Number(s): WHC-SD-SQA-CSA-20382; ON: DE95004147; BR: 35AF11201/35AF11202; TRN: AHC29503%%26
• Resource Relation: Other Information: PBD: 18 Nov 1994
• Country of Publication: United States
• Language: English

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