Deuterium Storage Tanks (Deck 16)

This deck is given over almost entirely to deuterium storage, a vast open bay dominated by a row of massive spherical storage tanks, each easily eight meters in diameter, their curved surfaces finished in matte white composite streaked with pale blue frost-like condensation patterns near the base where the supercooled fuel chills the outer hull of each tank. The spheres are nested in heavy cradle framework of dark structural alloy, bolted directly into the deck and reinforced overhead with cross-bracing that gives the entire bay an industrial, almost cathedral-like scale, the ceiling lost in shadow high above the tank crowns. Each tank is fitted with a cluster of pressure relief valves and a large analog-style gauge cluster mounted at eye level on an access ladder that spirals partway up the tank's flank, allowing a technician to reach inspection ports positioned at intervals along its curve. Thick insulated feed lines run from the base of each sphere across the deck in shallow trenches, converging toward a central manifold junction near the compartment's forward bulkhead, from which the fuel is drawn onward toward the processing and transfer systems elsewhere on the ship. A thin, near-continuous hiss of venting pressure-equalization gas is audible near the manifold, a soft background note beneath the deeper structural creak of the tanks settling under their own enormous mass. The deck itself is bare, non-slip grey composite, kept clear of clutter for safety, with wide yellow-striped walkways marking the approved paths between tank cradles. Lighting is bright but distant, mounted high on the overhead framework and casting long shadows down the curved tank walls. The air in the bay is noticeably cold, carrying a faint crisp chill that clings to exposed skin near the tanks themselves, and but for the occasional venting hiss and the low structural groan of thermal contraction, the compartment sits in a vast, echoing quiet befitting its cavernous scale.