Document 3Q09npR63YaZVvq1gGL0k1mE

Interoffice Communication To A. H. Sather From J. V. Uptain Date December 11, 1978 Subject VCM DOSIMETRY FOR NOVEMBER, 1978 Following are the results of VCM dosimetry during November, 1978. 67 regular samples were taken, 12 (18%) of which indicated overexposure. Range, PPM No. Samples % 0.0 - 0.5 0.5 - 1.0 1.0'- 5.0 5.0 + 52 3 10 2 67 77.61 4.48. 14.93 2.98 100.00 Detailed results of the 12 overexposures are shown in the attached tahl!|>-YKnock out tank work and VCM filter changing lead the list of known causes. Only one set of reactor condenser cleaning samples was obtained this month, with results of: Blanking - 1.1 ppm Brushing - 2.0 ppm The two samples were taken while an eductor was in use and may indicate it is insufficient to preclude the need for respiratory protection. More samples are needed, as this may have been a "spurious" result. Jerald V. Uptain jf Attachments c: Plant Manager, Department Heads D. A. Kuhn, J. J. Hall---''' 0. D. Steffey SAL 000108704 f'