Hazards Report for SM-1 Core II With the SM-1 Core II With the Silver-Cadmium-Indium Control Rod Absorber Section

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Description

Abstract: In the March-April 1962 shutdown of SM-1 Core II, the SM-28 element will be re-inserted in SM-1 Core II and an SM-1 Core I element will be removed. An SM-1 Core II europium absorber will be replaced by a Ag-Cd-In absorber, and surveillance specimens will be inserted above the core support structure. Analysis of these changes concludes that re-insertion of the SM-2B stationary element and insertion of surveillance specimens do not affect hazards potential previously defined for SM-1. Replacement of the europium absorber by the Ag-Cd-In absorber will have negligible effect on reactivity control worth of the rod. The … continued below

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x, 26 pages ; illustrations.

Creation Information

Stephenson, L. D. March 15, 1962.

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Description

Abstract: In the March-April 1962 shutdown of SM-1 Core II, the SM-28 element will be re-inserted in SM-1 Core II and an SM-1 Core I element will be removed. An SM-1 Core II europium absorber will be replaced by a Ag-Cd-In absorber, and surveillance specimens will be inserted above the core support structure. Analysis of these changes concludes that re-insertion of the SM-2B stationary element and insertion of surveillance specimens do not affect hazards potential previously defined for SM-1. Replacement of the europium absorber by the Ag-Cd-In absorber will have negligible effect on reactivity control worth of the rod. The absorber meat section is encapsulated to prevent exposure of silver alloy to the primary coolant; postulated release of silver due to a cladding defect, after 2 years irradiation in SM-1, would not cause a hazard such as to restrict access to the vapor container. Possibility of steam formation in the air gap between the absorber core and cladding, causing a cladding failure, is remote. Deformation of the absorber section sufficient to cause the rod to stick, would not impair the ability of the other rods to shut down the reactor safely.

Physical Description

x, 26 pages ; illustrations.

Notes

Digitized from microopaque cards.

Contract No. AT(30-1)-2639 with the U.S. Atomic Energy Commission, New York Operations Office.

Includes bibliographic references (pages 25-26).

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  • Report No.: APAE-84 Addendum VI
  • Grant Number: AT(30-1)-2639
  • SuDoc Number: Y 3.AT 7:22/APAE-84 Addendum VI
  • Accession or Local Control No: metadc1201981
  • Archival Resource Key: ark:/67531/metadc1201981

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Technical Report Archive and Image Library

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Creation Date

  • March 15, 1962

Added to The UNT Digital Library

  • Aug. 15, 2019, 10:26 p.m.

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  • June 18, 2024, 3:19 a.m.

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Stephenson, L. D. Hazards Report for SM-1 Core II With the SM-1 Core II With the Silver-Cadmium-Indium Control Rod Absorber Section, report, March 15, 1962; Schenectady, New York.. (https://digital.library.unt.edu/ark:/67531/metadc1201981/: accessed November 6, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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