Irvine-based nuclear and hazardous waste remediation technology developer Kurion, which is venture backed by Lux Capital, Firelake Capital Management and Acadia Woods Partners, said this morning that it has acquired Vista Engineering Technologies, an engineering, design and technology firm. Kurion said the deal triples the company's employees, and gives it ownership of Vista Engineering's entire technology, patent, and trade secrte portfolio. Financial details of the acquisition were not announced. Kurion and Vista Engineering said they have previously been working together on nuclear waste projects. Vista Engineering Technologies was based in Richland, Washington.