Palo Verde requests some information pertaining to alpha monitoring at other stations: Do you currently have alpha contamination at your plant? If so
What is your average or typical Beta/Gamma to Alpha ratios? e.g., > 1000, 100 to 1000, < 100 What is the lowest Beta/Gamma to Alpha ratio that you have seen? If you have alpha contamination areas with ratios < 50:1 do you require that all items removed from the area have a direct frisk with an alpha contamination instrument? What instrument do you use to direct alpha frisking? What is the RDA for the instrument? What instrument do you use to count smears for alpha? For smears counted in a scalar, do you have an upper limit on activity levels to prevent cross- contamination or cross-talk? Do you have a specific posting for areas that contain alpha contamination? At what level do you post these areas? e. g., > 20 dpm/100 cm2 Do you perform routine in-vitro analysis for personnel working in alpha contamination areas or only when there are indications that that a potential intake has occurred? ********************************************************************** Seth J. Kanter, CHP, RPT Sr. Health Physicist Palo Verde Nuclear Generating Station Mail Sta. 7397 5801 S. Wintersburg Rd. Tonopah, AZ 85354 Phone (623) 393-3130 Fax (623) 393-2487 Unless otherwise noted, all opinions are my own Liviu Librescu ********************************************************************** Email Firewall made the following annotations --------------------------------------------------------------------- --- NOTICE --- This message is for the designated recipient only and may contain confidential, privileged or proprietary information. If you have received it in error, please notify the sender immediately and delete the original and any copy or printout. Unintended recipients are prohibited from making any other use of this e-mail. Although we have taken reasonable precautions to ensure no viruses are present in this e-mail, we accept no liability for any loss or damage arising from the use of this e-mail or attachments, or for any delay or errors or omissions in the contents which result from e-mail transmission. ---------------------------------------------------------------------
