Evaluating the need for a criticality alarm system at ANL-E

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Under the current climate of increasing regulation and decreasing budgets, DOE nuclear facilities are forced to become more efficient in operations aimed at satisfying regulatory requirements. Efficiency necessitates increased cooperation between the regulator (DOE) and facility management, and often a mutually agreeable innovative solution. At Argonne National Laboratory - East (ANL-E), one issue that required such an innovative solution and cooperation between contractor and regulator was the determination of whether the risk associated with an inadvertent criticality event justified the purchase and maintenance of a Criticality Alarm System (CAS) meeting ANSI/ANS-8.3-1986 requirements. According to DOE Order 420.1, the need for ... continued below

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6 p.

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Washburn, P. & Cohen, A. August 1, 1997.

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  • Washburn, P. Department of Energy, Argonne, IL (United States). Chicago Operations Office
  • Cohen, A. Argonne National Lab., IL (United States)

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Description

Under the current climate of increasing regulation and decreasing budgets, DOE nuclear facilities are forced to become more efficient in operations aimed at satisfying regulatory requirements. Efficiency necessitates increased cooperation between the regulator (DOE) and facility management, and often a mutually agreeable innovative solution. At Argonne National Laboratory - East (ANL-E), one issue that required such an innovative solution and cooperation between contractor and regulator was the determination of whether the risk associated with an inadvertent criticality event justified the purchase and maintenance of a Criticality Alarm System (CAS) meeting ANSI/ANS-8.3-1986 requirements. According to DOE Order 420.1, the need for a CAS is based on the probability of occurrence of a criticality accident. If the probability is <10{sup {minus}6}/yr (i.e., incredible) as determined by {open_quotes}commonly accepted engineering judgement,{close_quotes} then a CAS is not necessary. Installation of a CAS after such a conclusion would be a conservative decision and an unnecessary expense. This paper discusses the use of {open_quotes}commonly accepted engineering judgement{close_quotes} to show that the probability of an inadvertent criticality at a nonreactor nuclear facility (e.g., the Alpha-Gamma Hot Cell Facility) is <10{sup {minus}6}/yr. and is therefore an incredible event.

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6 p.

Notes

OSTI as DE97053464

Source

  • American Nuclear Society (ANS) topical meeting on criticality safety challenges in the next decade, Chelan, WA (United States), 7-11 Sep 1997

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  • Other: DE97053464
  • Report No.: ANL/ET/CP--91524
  • Report No.: CONF-970926--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 544712
  • Archival Resource Key: ark:/67531/metadc693681

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • May 20, 2016, 2:48 p.m.

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Washburn, P. & Cohen, A. Evaluating the need for a criticality alarm system at ANL-E, article, August 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc693681/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.