Document vVVLMXa2XavK2RvKg3nqB1yOY

A Interoffice Communication To J. E. Barton From r. McGhee Date December 13, 1978 subject VCM RELEASE On the night of 12/9/78 at approximately 0400 a.m.. Lead Operator Harold Sanders was filling the fresh VCM Receiver, 745, back up after charging Reactor 743. Bill King, Vinyl A Operator was coming down from the second floor recovery area and saw the relief valve lift and burp liquid VCM to the atmosphere, setting off the MSA deluge system. He then radioed Harold Sanders in the control room who noted that the reading on the level indicator had dropped to zero (it had frozen and given a false reading). He immediately shut the transfer system down. Bill King left the area immediately going into the wind and away from the release, thus no one was exposed to the release. The one lifting and resetting of the relief valve is the only known release for a rough time estimate of 5 to 10 seconds. Vinyl Shift Supervisor tap c: RAF, ELK, DWH, CLM VAB.0001220796