US2935401A - Control rod alloy containing noble metal additions - Google Patents

Control rod alloy containing noble metal additions Download PDF

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Publication number
US2935401A
US2935401A US701937A US70193757A US2935401A US 2935401 A US2935401 A US 2935401A US 701937 A US701937 A US 701937A US 70193757 A US70193757 A US 70193757A US 2935401 A US2935401 A US 2935401A
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percent
weight percent
alloy
control rod
noble metal
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US701937A
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William K Anderson
William E Ray
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Priority to NL106292D priority Critical patent/NL106292C/xx
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Priority to US701937A priority patent/US2935401A/en
Priority to GB33368/58A priority patent/GB832959A/en
Priority to DEU5714A priority patent/DE1119522B/en
Priority to FR1208840D priority patent/FR1208840A/en
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Publication of US2935401A publication Critical patent/US2935401A/en
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
    • G21C7/24—Selection of substances for use as neutron-absorbing material
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • C22C5/10—Alloys based on silver with cadmium as the next major constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • This invention relates in general to alloys suitable for use in the fabrication of control rods for neutronic reactors, and more specifically to silver base alloys suitable for such applications.
  • the alloys of this invention are essentially improvements of an already existing alloy, which is the subject of copending application Ser. No. 688,995, filed October 8, 1957.
  • This alloy is known to have nuclear properties which make it quite suitable for use as a neutronic reactor control rod material.
  • the already know alloy consists essentially of from 0 to percent of cadmium, from 2 to weight percent of indium and from 65 to 85 weight percent silver, and while this alloy has a proven nuclear worth, it lacks structural strength characteristics to an extent sufficient to restrict its use in some applications.
  • An alloy adapted for use as a neutronic reactor control rod material consisting of from 0.5 weight percent to about 1.5 weight percent of a noble metal selected from the group consisting of platinum, ruthenium, rhodium, osmium, and palladium, up to 10 weight percent of cadmium, from 2 weight percent to 20 weight percent indium, the balance being silver.
  • a control rod member for use in neutronic reactors consisting of an alloy falling within the compositions of claim 1.
  • An alloy adapted for use as a neutronic reactor control rod material consisting of about 1 weight percent platinum, about 5 weight percent cadmium, about 15 weight percent indium, the balance being silver.
  • a control rod member for use in neutronic reactors consisting of the alloy of claim 3.
  • An alloy adapted for use as a neutronic reactor controd rod material consisting of about 1 weight percent ruthenium, about 5 weight percent cadmium, about 15 weight percent indium, the balance being silver.
  • a control rod member for use in neutronic reactors consisting of the alloy of claim 5.
  • An alloy adapted for use as a neutronic reactor control rod material consisting of about 1 Weight percent rhodium, about 5 weight percent cadmium, and 15 weight percent indium, the balance being silver.
  • a control rod member for use in neutronic reac tors consisting of the alloy of claim 7.
  • An alloy adapted for use as a neutronic reactor control rod material consisting of about 1 weight percent osmium, about 5 weight percent cadmium, about 15 percent indium, the balance being silver.
  • V 3 10
  • An alloy adapted for use as a neutronie reactor control rod material consisting of about 1 weight percent palladium, about 5 weight percent cadmium, about 15 weight percent indium, the balance being silver.
  • a control rod member for use in neutronic reactors consisting of the alloy of claim 11.

Description

United States Patent CONTROL ROD ALLOY CONTAINING NOBLE METAL ADDITIONS William K. Anderson and William E. Ray, Schenectady,
N.Y., assignors to the United States of America as represented by the United States Atomic Energy Commission No Drawing. Application December 10, 1957 Serial No. 701,937
12 Claims. (Cl. 75-173) This invention relates in general to alloys suitable for use in the fabrication of control rods for neutronic reactors, and more specifically to silver base alloys suitable for such applications.
It is an object of this invention to provide an alloy composition suitable for use in fabricating control rods for neutronic reactors.
It is a further object of this invention to provide an alloy composition suitable for use in control rods for neutronic reactors, which possesses superior structural strength properties.
The alloys of this invention are essentially improvements of an already existing alloy, which is the subject of copending application Ser. No. 688,995, filed October 8, 1957. This alloy is known to have nuclear properties which make it quite suitable for use as a neutronic reactor control rod material. The already know alloy consists essentially of from 0 to percent of cadmium, from 2 to weight percent of indium and from 65 to 85 weight percent silver, and while this alloy has a proven nuclear worth, it lacks structural strength characteristics to an extent sufficient to restrict its use in some applications.
It has been found that this shortcoming of the original cadmium-indium-silver alloy may be overcome through the addition to the basic alloy of a noble metal selected from the group consisting of platinum, ruthenium, rhodium, osmium, and palladium in amounts from about 0.5 weight percent to about 1.5 weight percent. This can be seen more clearly by reference to the attached table. 5 weight 2,935,401 Patented May 3, 11960 Any conventional method of preparation may be employed in producing the alloy compositions of this invention. The alloy can be easily prepared by placing in a graphite crucible the desired constituents. The components may then be melted by means of induction heating apparatus or by any other suitable means. To prevent oxidation of the molten alloy, a protective cover of calcined coke pellets may be placed on the surface of the melt, and after melting, the alloy may be cast by any convenient method.
It is not intended that this invention be limited in any way except by the scope of the appended claims.
We claim:
1. An alloy adapted for use as a neutronic reactor control rod material consisting of from 0.5 weight percent to about 1.5 weight percent of a noble metal selected from the group consisting of platinum, ruthenium, rhodium, osmium, and palladium, up to 10 weight percent of cadmium, from 2 weight percent to 20 weight percent indium, the balance being silver.
2. A control rod member for use in neutronic reactors consisting of an alloy falling within the compositions of claim 1.
3. An alloy adapted for use as a neutronic reactor control rod material consisting of about 1 weight percent platinum, about 5 weight percent cadmium, about 15 weight percent indium, the balance being silver.
4. A control rod member for use in neutronic reactors consisting of the alloy of claim 3.
5. An alloy adapted for use as a neutronic reactor controd rod material consisting of about 1 weight percent ruthenium, about 5 weight percent cadmium, about 15 weight percent indium, the balance being silver.
6. A control rod member for use in neutronic reactors consisting of the alloy of claim 5.
7. An alloy adapted for use as a neutronic reactor control rod material consisting of about 1 Weight percent rhodium, about 5 weight percent cadmium, and 15 weight percent indium, the balance being silver.
8. A control rod member for use in neutronic reac tors consisting of the alloy of claim 7.
9. An alloy adapted for use as a neutronic reactor control rod material consisting of about 1 weight percent osmium, about 5 weight percent cadmium, about 15 percent indium, the balance being silver.
Data showing mechanical properties of modified Cd- In-Ag alloys (additions of the indicated percentage of fourth metal, as shown, to the basic 5% Cd15% In% Ag alloy) Sample 0.2% Offset, Ult. Str., Percent Percent Hard- Composition Number Yield Str., lbs/in. Elong. Rednct. ness, Temp.
lbs/in. of area Rr Base Alloy 1 11, 760 44, 250 78. 2 57. 3 49.1 Rm. (0d 5 w/o, In 15 w/o, Ag 2 11,690 41, 590 71. 8 59. 5 49. 7 Rm. balance.) 3 11, 910 40, 670 75. 0 61. 4 49. 9 Rm.
4 7, 400 ,360 60.5 52.9 600 F 5, 900 37, 400 84. 4 59. 7 38 Rm. 0.1 wt. Percent Pt. 9, 300 38, 700 81. 2 61.6 45 Rm. 0.5 wt. Percent Pt. 14, 900 500 75. 0 57. 8 52 Rm. 1.0 wt. Percent Pt. 1 16, 200 41, 65. 6 51. 0 64 Rm. 1.0 wt. Percent Pt--- 2 15, 200 50. 0 44. 9 64.1 600 F. 1.0 wt. Percent Pt--. 3 11,800 14, 750 41. 5 63. 5 600 F. 1.0 wt. Percent Pd- 1 20, 490 43, 800 68. 8 52. 2 60. 9 Rm. 1.0 wt. Percent; Pd. 2 20, 390 43, 790 75.0 52. 9 55. 9 Rm. 1.0 wt. Percent Ru 1 18, 990 38, 690 75.0 59. 4 37. 9 Rm. 1.0 wt. Percent Ru- 2 10, 930 12, 890 94.1 37. 5 600 F 1.0 wt. Percent Ru.. 3 18, 660 38, 75.0 57.1 36. 9 Rm. 1.0 wt. Percent Ru 4 11, 12, 680 59. 4 62. 4 48. 9 600 F 1.0 wt. Percent Ru 5 21, 010 39, 760 65.6 48. 8 50. 9 Rm. 1.0 wt. Percent Ru 6 11, 500 13, 240 53. 2 45. 4 54. 4 600 F 1.0 wt. Percent 0s 1 21, 730 40, 170 56. 2 46. 3 50. 5 Rm. 1.0 wt. Percent Os 2 21, 910 39,360 62. 4 47. 7 54. 2 Rm. 1.0 wt. Percent Rh. 1 26, 610 44,070 59.4 56.1 73. 9 Rm. 1.0 wt. Percent; Rh 2 26, 700 44, 170 62. 4 58. 7 70. 7 Rm. 1.0 wt. Percent Rh 3 26, 650 62. 4 67. 3 74. 8 Rm. 1.0 wt. Percent Rh 4 11, 560 13, 760 59. 4 73. 4 74.9 600 1.0 wt. Percent Rh 5 11,150 12,840 87.6 89. 4 75.4 600 F 1.0 wt. Percent Rh 6 10, 880 12, 260 65. 6- 73. 9 77. 0 600 F.
V 3 10. A control rod member for use in neutronic reactors consisting of the alloy of claim 9.
' 11. An alloy adapted for use as a neutronie reactor control rod material consisting of about 1 weight percent palladium, about 5 weight percent cadmium, about 15 weight percent indium, the balance being silver.
12. A control rod member for use in neutronic reactors consisting of the alloy of claim 11.
References Cited in e file of this patent UNlTED STATES PATENTS Henzel et 211.7". May 9, 1939 OTHER REFERENCES Technical Progress Review, Reactor Core Materials, vol. 1, No. 1, March 1958. (Pages 23 and 26 relied on.)

Claims (1)

1. AN ALLOY ADAPTED FOR USE AS A NEUTRONIC REACTOR CONTROL ROD MATERIAL CONSISTING OF FROM 0.5 WEIGHT PERCENT TO ABOUT 1.5 WEIGHT PERCENT OF A NOBLE METAL SELECTED FROM THE GROUP CONSISTING OF PLATINIUM, RUTHENIUM, RHODIUM, OSMIUM, AND PALLADIUM, UP TO 10 WEIGHT PERCENT OF CADMIUM, FROM 2 WEIGHT PERCENT TO 20 WEIGHT PERCENT INDIUM, THE BALANCE BEING SILVER.
US701937A 1957-12-10 1957-12-10 Control rod alloy containing noble metal additions Expired - Lifetime US2935401A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL106292D NL106292C (en) 1957-12-10
US701937A US2935401A (en) 1957-12-10 1957-12-10 Control rod alloy containing noble metal additions
GB33368/58A GB832959A (en) 1957-12-10 1958-10-20 Improved silver alloy for the control rods of nuclear reactors
DEU5714A DE1119522B (en) 1957-12-10 1958-10-30 Silver alloy and its special use
FR1208840D FR1208840A (en) 1957-12-10 1958-11-24 Improved nuclear alloy containing noble metal additions

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US701937A US2935401A (en) 1957-12-10 1957-12-10 Control rod alloy containing noble metal additions

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US2935401A true US2935401A (en) 1960-05-03

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DE (1) DE1119522B (en)
FR (1) FR1208840A (en)
GB (1) GB832959A (en)
NL (1) NL106292C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141761A (en) * 1962-02-23 1964-07-21 Walter U Schmitt G M B H Fa Dr Pulverized silver alloys for use in producing dental amalgams
US3185652A (en) * 1960-04-29 1965-05-25 Nuclear Corp Of America Refractory rare earth material
US3239333A (en) * 1963-01-02 1966-03-08 Super Metals Inc Isotopic alloys and articles thereof
US5684847A (en) * 1994-11-02 1997-11-04 Framatome Silver-based alloy containing indium and cadmium for the production of neutron-absorber components, and use
US6226340B1 (en) 1996-05-22 2001-05-01 General Electric Company Hermaphroditic absorber loading for higher worth control rods

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157933A (en) * 1938-08-06 1939-05-09 Mallory & Co Inc P R Silver-indium contact

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157933A (en) * 1938-08-06 1939-05-09 Mallory & Co Inc P R Silver-indium contact

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185652A (en) * 1960-04-29 1965-05-25 Nuclear Corp Of America Refractory rare earth material
US3141761A (en) * 1962-02-23 1964-07-21 Walter U Schmitt G M B H Fa Dr Pulverized silver alloys for use in producing dental amalgams
US3239333A (en) * 1963-01-02 1966-03-08 Super Metals Inc Isotopic alloys and articles thereof
US5684847A (en) * 1994-11-02 1997-11-04 Framatome Silver-based alloy containing indium and cadmium for the production of neutron-absorber components, and use
US6226340B1 (en) 1996-05-22 2001-05-01 General Electric Company Hermaphroditic absorber loading for higher worth control rods

Also Published As

Publication number Publication date
NL106292C (en)
GB832959A (en) 1960-04-21
FR1208840A (en) 1960-02-25
DE1119522B (en) 1961-12-14

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