Document Gmm7pE5oddmKRk8RV411M6dnn

Telecopy to J. T Barr pages) CSCAMBIA PLANT INC. INTEROFFICE MEMORANDUM To: Mr. E. A. Ray Dote: 12 March 1974 Wce/VED mar 15 ig74 From: ' W. C. Wilde Personal Monitoring for VCM Exposure at Pace Plant Copies: J* T. Barr T- L. Careyy R. Fleming*"'^ J. -D. Kramer A. K. McMillan E. A. Frimeau G. B. H. Speed R. R. Spiegelhalter M. Sterman Three portable sampling systems have been received and are now being used for personal monitoring of VCM levels at the Pace Plant. After an initial period of debugging, it was found that the battery life was only 3 to 4 hours before a 16 to 20 hour recharge was needed. This is the same battery life experienced at Calvert City with identical equipment. To increase the utilization of these instruments a purchase order has been placed for 6 more batteries and 3 more chargers. It was expected that the operators exposed to the highest VCM levels would be the utility, recoveiyand solutions operators. The utility operators clean reactors, blind and unblind them, and do most of the washing out; therefore, we expected them to experience higher exposure levels than other operators. The initial round of samples showed: Utility Operator Solutions Operator Recovery Operator 27 ppm VCM 8 ppm. VCM 6 ppm VCM This data confirmed our expectations, and it was decided that the initial testing program should concentrate on the utility operators. The next two samples taken on the utility operators showed 14 ppm and 180 ppm. The 180 ppm reading was taken during a three-hour reactor cleaning period. As a result of this unexpected high reading, the following steps were taken: 1) The nan's supervisor was questioned and he said that normal entry procedure was followed. 2) It was impossible to contact the employee directly, he walked off the job without giving notice. His final paycheck is being withheld until he is questioned about possible unusual conditions. AP00005864 Mr. E. A. Ray Personal Monitoring for VCM Exposure 12 March 1974 Page 2 3) - Based on this one high {180 ppm) analysis, our entry procedures were modified to require the shift supervisor to check each reactor prior to entry with the Century portable analyzer. We have been reluctant to require this since the Century has not yet received UL approval for use in hazardous areas. The monitoring of utility operators has continued and the results have ranged from 5 to 88 ppm. The average for all utility operators to date (including the 180 ppm) is 51 ppm. Our program is to continue to monitor the exposure levels of the reactor cleaners to the exclusion of the other operators. We expect to have a good set of base data for the cleaners within one week. At that time our monitoring program will be extended to include the other operators. #u W. C. Wilde- WCWtbp Enclosure AP00005865 ------J ..for. VC/4 Atow.itoW *pjure On^ra'Ki-r'i tA T;tifi 2p-f-A?*tr's____ Q&i? ri^W' S , T^we 3i*r^ S.kif'V .... TW*y... _'/-/4 Sa>I \e^i ;___ Sw)y*\'.erft3_____ Jv -Su w.w e^U w 3/^rr /a`3o^M H3Q^ 7-3 ^'q*1____Q _| fee t. o_y_ r _____ A."Coi\s ~~~ 3/V?4 ~ 4,.oot^ 7'P^ 3-<|/"a- ^ ____iJliUvtfF. h;4rj0A, t 7:3-11 /y 27 ppw .UV>'Hv F. tWtrio* /3 7/74 43M 7,'aofM 3-i>/V 14 fp; ________________: i it' . * J /2.;ooMN_____U -w I i\y * _____A\a.t-A\t\ {jj.-r^oi)___ 3/c/?^- II-J130 IA^!_\ iVy .. ________^tvAyrSQA 3^8/ 7^_8! >M '''oo 1-II|/a>~ jj ^pWl U>V\T^ * ~~~uk\v^~.'~^ ifVrrv ' ina fM~'T-3/'c" ~ 14 "f" .. 37^74 * c^Hhi/v 4? fP,. ..J*________________ H^*^fSov\~3 __l' AoA*. H -"7^ Bi /TtiiiTJ'-* Wr^... = 3l>*/n i4fu* c"~74 f fV I'.lWMv . ... H^woa i /io/?4 l1-^p* r*7^ T-u/v U4;i7fr~ * Udtow 3/>1/74 a:TM ** r^VaTi o/a11 23^ 88 f 1 ^ O* wj * S !* r a^cV ar iUVIk^ 3e<th*ai AP00005866