Melanized Half-Life (JEEP II)

The timeline of nuclear decommissioning cannot be effectively legislated; it must be metabolized, physically binding the dismantling schedule to the biological uptake of decaying isotopes.

Radiotrophic fungal bioreactor retrofitted over the decommissioned JEEP II reactor core. · motion: pulsing darkly as it metabolizes gamma radiation

wall text

Decommissioning timelines for nuclear infrastructure are typically dictated by political mandates or fiscal quarters rather than radiological physics. Here, the dismantling schedule of the JEEP II research reactor at Kjeller is tied directly to biological metabolism. A lead-glass chemostat mounted over the reactor core cultivates Cladosporium sphaerospermum, a radiotrophic fungus that harnesses gamma emissions via melanogenesis. Ionization levels regulate nutrient dosing, while legacy stockpiles of Norsk Hydro heavy water are metered into the medium to stabilize growth rates. Dismantling proceeds only as the fungal mat uptakes activated corrosion products, transposing the calculated half-life of Cobalt-60 into cellular mass.

shown: Installed directly on the biological shield of the JEEP II reactor at Kjeller, accessible in person only to NND personnel and to the public via real-time dosimeter and growth telemetry.

anchor facts used

JEEP I went critical in 1951 using heavy water from Norsk Hydro.
JEEP II was permanently shut down in 2019 by the Institute for Energy Technology (IFE) due to corrosion in the reactor tank.
The site is currently undergoing a multi-decade dismantling managed by Norwegian Nuclear Decommissioning (NND).

mechanism

Exponential radioactive decay law (N(t) = N_0 e^{-\lambda t}) — A Geiger-Muller array controls the valve for a nutrient substrate, releasing glucose only when gamma emissions drop below specific microSievert thresholds.
1. Isotope-gated nutrient flow
Radiotrophic melanogenesis — Cladosporium sphaerospermum fungi are cultivated within a lead-glass bioreactor, utilizing melanin to convert remaining ionizing radiation into chemical energy for growth.
2. Radiotrophic inoculation
Chemostat continuous culture (dilution rate = growth rate) — The growth rate of the fungal mass triggers an automated dilution system that incrementally replaces standard water with deuterium oxide to stress and limit overproliferation.
3. Deuterium dilution
Biological half-life elimination — The fungal mat actively absorbs heavy metals and is periodically harvested via automated scraping once specific sectors reach background radiation equivalence.
4. Excretion and stabilization

lineage

Dadachova et al., 'Ionizing Radiation Changes the Electronic Properties of Melanin and Enhances the Growth of Melanized Fungi' (2007) — Provides the biological foundation for melanin-mediated energy capture, which this work operationalizes as an industrial decommissioning tool.
Oron Catts and Ionat Zurr, Tissue Culture & Art Project — Expands their semi-living bioreactor sculpture format out of the sterile gallery and into active, hazardous radio-ecology.
James Acord, 'The Monstrance for a Grey Horse' (1989) — Shares the ambition of transmuting actual radioactive material through conceptual art, but replaces Acord's metallurgy with mycology.

curatorial qa (machine verdict, unedited)

SCORE 4/5 after 1 attempt(s)
READS: The integration of a melanized fungal bioreactor directly onto the cylindrical JEEP II reactor vessel at Kjeller reads clearly, supported by the IFE technical chart mapping Monod fungal kinetics against Cobalt-60 decay curves.
FAILS: The promised dark metabolic pulsing of the fungal culture is subtle; the fluid within the glass vessel remains largely stationary beneath the camera orbit rather than exhibiting active physiological churning.

spec: antigravity agent · keyframe/artifact: gemini-3.1-flash-image · video: veo-3.1 image-to-video · qa+wall text: gemini-3.7-flash watching the render · 30.5s total