ANSI/ANS-8.12-1987(R93): Criticality control of plutonium-uranium mixtures

Journal Article · Tue Dec 31 04:00:00 EST 1996 · Transactions of the American Nuclear Society

OSTI ID:426422

Clayton, E D ^[1]; McLaughlin, T P ^[2]

---

1. Pacific Northwest National Lab., Richland, WA (United States)
2. Los Alamos National Lab., NM (United States)

American National Standards Institute/American Nuclear Society (ANSI/ANS)-8.12-1987(R93) was approved for use on September 11, 1987. The first version of this standard, which only included subcritical limits on homogeneous plutonium-uranium fuel mixtures, was approved July 17, 1978. The current version was revised to include limits on heterogeneous systems as well. This paper provides additional information on the limits presented in the standard. As stated in its forward, the standard {open_quotes} ... provides guidance for the prevention of criticality accidents in the handling, storing, processing, and transporting of plutonium-uranium fuel mixtures outside reactors and is applicable to all operations involving mixtures of plutonium and natural uranium.{close_quotes} It constitutes an extension of the American National Standard for Nuclear Criticality Safety in Operations with Fissionable Materials Outside Reactors, ANSI/ANS-8.1-1983. The standard includes subcritical limits for both homogeneous mixtures and heterogeneous lattices of plutonium and uranium. The uranium is assumed to be natural or depleted.

• OSTI ID: 426422
• Report Number(s): CONF-961103--
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 75; ISSN TANSAO; ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
42 ENGINEERING
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
CRITICALITY
DEPLETED URANIUM
FUEL SOLUTIONS
HETEROGENEOUS REACTOR CORES
MIXTURES
MODIFICATIONS
NATURAL URANIUM
NUCLEAR FUELS
PLUTONIUM
RADIATION PROTECTION
SAFETY STANDARDS