Human Interference Task Force

The Human Interference Task Force was a team of engineers, anthropologists, nuclear physicists, behavioral scientists and others convened on behalf of the U.S. Department of Energy and Bechtel Corp. to find a way to reduce the likelihood of future humans unintentionally intruding on radioactive waste isolation systems. Specifically, the task force was to research the use of long-time warning messages to prevent future access to the planned, but stalled, deep geological nuclear repository project of Yucca Mountain.

ISO radiation warning sign.


When atomic or fusion bombs are detonated in a war, or nuclear power plants are used in times of peace, an unnaturally high amount of radioactive waste is produced. This material will threaten human life and health for thousands of years. Consequently, nuclear technology necessitates the creation of a secure means of terminal storage for such materials for an unusually long time period.

However, there is no method available to continuously provide the necessary knowledge about the location of nuclear waste over thousands of years. The culture of earlier centuries becomes incomprehensible when it is not translated into new languages every few generations. National institutions do not exist longer than a few hundred years. Even religions are not older than a few millennia and do not typically hand down scientific knowledge.

Furthermore, the necessary length of storage is disputed among specialists. One work group in Germany concluded that nuclear waste must be separated from the biosphere up to one million years – about 30,000 human generations[citation needed]. Earlier assumptions were based on a period of 10,000 years, which seems to be too short given the half-life of certain radioactive isotopes (e.g. Plutonium-239 at 24,000 years).

The written historical tradition of humanity, in contrast, is only about 5000 years. Warnings in cuneiform script could be interpreted by some specialists, but others, such as the writing of the Indus Valley civilization, are already illegible after a few thousand years.


Three parts of any communication about nuclear waste must be conveyed to posterity:

  1. that it is a message at all
  2. that dangerous material is stored in a given location
  3. information about the type of dangerous substances


To determine how to convey these three things, the "Zeitschrift für Semiotik" (Tübingen, Germany) issued a poll in 1982 and 1983 asking how a message might be communicated for a duration of 10,000 years. The poll asked the following question: "How would it be possible to inform our descendants for the next 10,000 years about the storage locations and dangers of radioactive waste?" leading to the following answers.[1]

Thomas SebeokEdit

The linguist Thomas Sebeok was a member of the Bechtel working group. Building on earlier suggestions made by Alvin Weinberg and Arsen Darnay he proposed the creation of an atomic priesthood, a panel of experts where members would be replaced through nominations by a council. Similar to the Catholic church - which has preserved and authorized its message for almost 2000 years — the atomic priesthood would have to preserve the knowledge about locations and dangers of radioactive waste by creating rituals and myths. The priesthood would indicate off-limits areas and the consequences of disobedience.[2][3][4]

This approach has a number of critical problems:

  1. An atomic priesthood would gain political influence based on the contingencies that it would oversee.
  2. This system of information favors the creation of hierarchies.
  3. The message could be split into independent parts.
  4. Information about waste sites would grant power to a privileged class. People from outside this group might attempt to seize this information by force.

Stanisław LemEdit

Polish science-fiction author Stanisław Lem proposed the creation of artificial satellites that would transmit information from their orbit to Earth for millennia.[5] He also described a biological coding of DNA in a mathematical sense, which would reproduce itself automatically. Information Plants would only grow near a terminal storage site and would inform humans about the dangers. The DNA of the so-called atomic flowers would contain the necessary data about both the location and its contents.

Lem acknowledged the problem with his idea that humans would be unlikely to know the meaning of atomic flowers 10,000 years later, and thus unlikely to decode their DNA in a search for information.

Françoise Bastide and Paolo FabbriEdit

French author Françoise Bastide and the Italian semiotician Paolo Fabbri proposed the breeding of so-called "radiation cats" or "ray cats".[6][7][8][9] Cats have a long history of cohabitation with humans, and this approach assumes that their domestication will continue indefinitely. These radiation cats would change significantly in color when they came near radioactive emissions and serve as living indicators of danger. In order to transport the message, the importance of the cats would need to be set in the collective awareness through fairy tales and myths. Those fairy tales and myths in turn could be transmitted through poetry, music and painting. The story of this original project was depicted in the 2016 short documentary "The Ray Cat Solution".[10]

Vilmos VoigtEdit

Vilmos Voigt from Eötvös-Loránd University (Budapest) proposed the installation of warning signs in the most important global languages in a concentric pattern around the terminal storage location.[11] After a certain time span new signs with translations would be installed, but the old signs would not be removed. Newer signs would be posted farther away from the location, thus the warning would be understandable as languages change and it would be possible to understand the older languages through the translation.

Emil KowalskiEdit

Physicist Emil Kowalski from Baden, Switzerland proposed that terminal storage locations be constructed in such a way that future generations could reach them only with a high technical ability. The probability of an unwanted breach would then become extremely small. Furthermore, cultures able to perform such excavations and drillings would most certainly be able to detect radioactive material and be aware of its dangers.


  1. ^ "Und in alle Ewigkeit: Kommunikation über 10 000 Jahre: Wie sagen wir unsern Kindeskindern wo der Atommüll liegt?" [And into Eternity... Communication over 10000s of Years: How Will We Tell our Children's Children Where the Nuclear Waste is?]. Zeitschrift für Semiotik (in German). Berlin: Deutschen Gesellschaft für Semiotik. 6 (3). 1984. ISSN 0170-6241.
  2. ^ Thomas A. Sebeok, "Pandora’s Box in Aftertimes" in I  think I am a verb : more contributions to the doctrine of signs,  Springer, 1986, pp. 149-173.
  3. ^ Sebeok, Thomas (1984). "Die Büchse der Pandora und ihre Sicherung: Ein Relaissystem in der Obhut einer Atompriesterschaft" [Pandora's box and its protection: A relay system in the care of an atom priesthood]. Zeitschrift für Semiotik (in German). Berlin: Deutschen Gesellschaft für Semiotik. 6 (3). ISSN 0170-6241.
  4. ^ "Pandora's Box: How and Why to Communicate 10,000 Years into the Future".
  5. ^ Lem, Stanisław (1984). "Mathematische Kodierung auf lebendem Trägermaterial" [Mathematical coding on living carrier material]. Zeitschrift für Semiotik (in German). Berlin: Deutschen Gesellschaft für Semiotik. 6 (3). ISSN 0170-6241.
  6. ^ Bastide, Françoise; Fabbri, Paolo (1984). "Lebende Detektoren und komplementäre Zeichen: Katzen, Augen und Sirenen" [Living detectors and complementary signs: Cats, eyes and sirens]. Zeitschrift für Semiotik (in German). Berlin: Deutschen Gesellschaft für Semiotik. 6 (3). ISSN 0170-6241.
  7. ^ Kaufman, Rachel (2011). "Ray Cats, Artificial Moons and the Atomic Priesthood: How the Government Plans to Protect Our Nuclear Waste". Mental Floss. Retrieved 2016-04-21.
  8. ^ "Ray Cat Solution". 10,000. Retrieved 2016-04-21.
  9. ^ Schwartz, Ariel (August 16, 2015). "Color-changing cats were once part of a US government plan to protect humankind". Tech Insider. Retrieved 2016-04-21.
  10. ^ Huguet, Benjamin (2016). "The Raycat Solution". Vimeo. Retrieved 2016-04-21.
  11. ^ Voigt, Vilmos (1984). "Konzentrisch angeordnete Warntafeln in zunehmend neueren Sprachformen" [Concentrically arranged warning signs in increasingly newer language forms]. Zeitschrift für Semiotik (in German). Berlin: Deutschen Gesellschaft für Semiotik. 6 (3). ISSN 0170-6241.

Further readingEdit

  • Roland Posner (Hg.): Warnungen an die ferne Zukunft – Atommüll als Kommunikationsproblem. Raben-Verlag, München, ISBN 3-922696-65-1
  • J. Kreusch und H. Hirsch: Sicherheitsprobleme der Endlagerung radioaktiver Abfälle in Salz. Gruppe Ökologie, Hannover 1984
  • Umberto Eco: The search for the perfect language, Wiley-Blackwell, 1995, pages 176–177. ISBN 0-631-17465-6. [1]
  • Thomas A. Sebeok; Communication Measures to Bridge Ten Millennia (Columbus, Ohio: Battelle Memorial Institute, Office of Nuclear Waste Isolation, 1984)
  • Sebastian Musch: "The Atomic Priesthood and Nuclear Waste Management - Religion, Sci-fi Literature and the End of our Civilization". Zygon. Journal of Religion and Science, Volume 51, Issue 3, p. 626–639.

External linksEdit