ANSI/ANS-8.21-1995: Use of fixed neutron absorbers in nuclear facilities outside reactors
- Safe Sites of Colorado, Golden, CO (United States)
In 1995, American National Standards Institute/American Nuclear Society (ANSI/ANS)-8.21-1995, {open_quotes}Use of Fixed Neutron Absorbers in Nuclear Facilities Outside Reactors,{close_quotes} was approved and published as the most recent in a series of standards providing detailed guidance on topics covered in general terms in ANSI/ANS-8.1, {open_quotes}Criticality Safety in Operation with Fissionable Materials Outside Reactors. {close_quotes} In the mid-1980`s, with the emphasis on the use of engineered nuclear criticality safety controls, standardized guidance in the use of fixed neutron absorbers in the design, construction, and operation of nonreactor nuclear facilities was needed. Fixed neutron absorbers are materials that are an integral part of a facility and equipment, have neutron absorption properties, and are incorporated into designs to ensure safety margins for subcriticality as required for normal and abnormal operating conditions. ANSI/ANS-8.21-1995 provides such guidance that applies to the design, construction, and operation of facilities used for handling, processing, and storing of fissionable material, including equipment associated with the transportation of fissionable material. Fixed neutron absorbers are controlled differently from soluble neutron absorbers and from Raschig rings. Soluble neutron absorbers are covered by the proposed standard ANSI/ANS-8.14, `Subcritical Limits of Fissile Materials in Solution of Neutron Absorbers.` Raschig rings are discussed in ANSI/ANS-8.5, `Use of Borosilicate-Glass Raschig Rings as a Neutron Absorber in Solutions of Fissile Material.`
- OSTI ID:
- 426426
- Report Number(s):
- CONF-961103--
- Journal Information:
- Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 75; ISSN 0003-018X; ISSN TANSAO
- Country of Publication:
- United States
- Language:
- English
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