Q: What special maintenance considerations apply to nuclear qualified low voltage cables during long term operation, especially after radiation and thermal ageing cycles?

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A: Nuclear‑qualified cables face combined stresses including gamma‑radiation, high‑temperature ageing and possible LOCA‑simulated condition impacts. Routine visual check cannot judge internal insulation degradation status only from outer‑jacket appearance. Perform scheduled dielectric‑loss and insulation‑resistance trending tests rather than only spot‑check values. Track operation‑time cumulative radiation dose records, compare against cable‑qualified‑specification limits, and arrange replacement when trending parameters approach threshold even without obvious external damage.