Subcritical Mass Limits for the T-Insert

Conference · Sat Nov 15 23:00:00 EST 1975 · Transactions of the American Nuclear Society

OSTI ID:4164573

Clark, H. K. ^[1]

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1. Du Pont de Nemours (E.I.) and Co., Aiken, SC (United States). Savannah River Lab.

Safe limits are derived for Class III shipments of ²³⁵U, ²³⁹Pu, and ²³³U in the T-insert within the ANL T-2 cask. The cask has a 6.063-in.-dia cavity enclosed by lead 8 in. thick and clad with steel. The insert is 5-in. Schedule 40 stainless steel. No control is exercised over the configuration of the fissile material. The most restrictive of the conditions that must be satisfied for a Class III shipment is the requirement that the cask be subcritical when flooded internally and externally with water. Mass limits for the cask were calculated by ANISN with S₄ quadrature. Hansen-Roach cross sections were used, supplemented by some with the same group structure from other sources. To establish the bias in the method, calculations of k_eff were compared with appropriate critical experiments with aqueous solutions of ²³³U, ²³⁵U, and Pu and with HFIR experiments in which the core was reflected by steel, lead, and water.

• Research Organization: Du Pont de Nemours (E.I.) and Co., Aiken, SC (United States). Savannah River Lab.
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); US Energy Research and Development Administration (ERDA)
• NSA Number: NSA-33-006079
• OSTI ID: 4164573
• Report Number(s): DP-MS--75-89; CONF-751101--43
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 22; ISSN 0003-018X
• Publisher: American Nuclear Society
• Country of Publication: United States
• Language: English

Related Subjects

*CASKS-- SAFETY
*PLUTONIUM 239-- CRITICALITY
*URANIUM 233-- CRITICALITY
*URANIUM 235-- CRITICALITY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Hansen-Roach Cross Sections
High Flux Isotope Reactor (HFIR) Core
KENO Code
Lazarus Set
Lead and Steel Reflector
Nuclear Criticality Safety Program (NCSP)
Safety Analyses Reports for Packaging