Disposal of activated fusion wall materials

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We have used NRC's low-level waste disposal regulation (10CFR61) to classify activated fusion reactor structural materials. The limits set by the NRC in 10CFR61 will require extremely expensive steels with degraded properties, even when the limits are adjusted to give credit for use of an expensive hot waste disposal facility. Both the expense and the poorer properties could have a negative impact on reactor safety, thus subverting the overall goals of the NRC family of regulations. Following this initial study, we have examined the methodology used by the NRC to set waste concentration limits. For a long-lived gamma emitter like ... continued below

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Pages: 8

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Blink, J.A.; Dorn, D.W. & Maninger, R.C. August 1, 1983.

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Description

We have used NRC's low-level waste disposal regulation (10CFR61) to classify activated fusion reactor structural materials. The limits set by the NRC in 10CFR61 will require extremely expensive steels with degraded properties, even when the limits are adjusted to give credit for use of an expensive hot waste disposal facility. Both the expense and the poorer properties could have a negative impact on reactor safety, thus subverting the overall goals of the NRC family of regulations. Following this initial study, we have examined the methodology used by the NRC to set waste concentration limits. For a long-lived gamma emitter like /sup 94/Nb, direct gamma dose to an intruding home builder dominates the limit setting process. Of all the tests applied to the waste, the controlling test which sets the lowest limit ignores all the engineered intrusion barriers which are themselves required by the same regulation. If even a small fraction of the barriers remain intact (an extremely likely event), the /sup 94/Nb limit could be increased from the 0.2 Ci/m/sup 3/ in 10CFR61 to 1100 Ci/m/sup 3/ without exceeding the limits set for personnel exposure. Similarly, cautious application of the 10CFR61 methodology to other radioisotopes of interest to fusion designers will result in limits which are more in line with the unique nature of fusion energy.

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Pages: 8

Notes

NTIS, PC A02/MF A01.

Source

  • 3. topical meeting on fusion reactor materials, Albuquerque, NM, USA, 19 Sep 1983

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  • Other: DE83017841
  • Report No.: UCRL-89511
  • Report No.: CONF-830942-3
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 5625234
  • Archival Resource Key: ark:/67531/metadc1093374

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 1, 1983

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 27, 2018, 2:57 p.m.

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Blink, J.A.; Dorn, D.W. & Maninger, R.C. Disposal of activated fusion wall materials, article, August 1, 1983; [Livermore,] California. (digital.library.unt.edu/ark:/67531/metadc1093374/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.