On Febr-16 2006, a heavy lightning strike occurred on a cooling water cell, which is quit near the control room of Naphthacracker #3 (NAK3). This caused the so- called ‘black-screen’ scenario for the ETBE unit. ‘Black-screen’ means that operators do not have control information of the process, although all control valves will remain in the last position. The cracker was shut downed because a small gas leakage near the charge gas compressors.
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