Document R21e42e45v6BQ9RExJRV95NoX

*d 4 ft- 4 Interoffice Communication To * : Jii Barton * ** I \. * David Hollis On* : April 16, 1978 * Subira : VCM RELEASE CONFIDENTIAL SUBMITTED UNDER atYornEv-tLiEtof PRIVILEGE i< Reactor 744 was charged with 5305 at 11:58 a.m. on April 16, 1978* Lead operator .Steve Kilgore set the tenperature setpoint at 151F. At approximately 2:00 p.m. the shell relief valve lifted. The reactor, having just reached heat-up, was at 150*F and 163 pounds of pressure. Steve had cut the jacket steam off approximately 8*F before setpoint to avoid over shooting. The controller was not calling for cooling water. The "A" operator, Sammie Stokes, was near the bottom of 744 reactor. He went to the south side of the unit up wind of the reactor and activated the HSC system. Sammie Stokes notified Steve, who sounded the VC release alarm and shut down the dryers. Steve put emergency cooling water on the reactor. relief valve reset in about 10 minutes when the reactor pressure was 100 pounds. No one was exposed to VCM. The dryers were down about 20 minutes. The all clear was sounded and the dryers restarted. The shift mechanic, Jimmy Walker, Sammie Stokes and myself reset the MSA system. ELK, JAHS * i' t h * i VAR