1. Tennelec 5XLB, Tennelec LB4100, Protean-WPC-9550, Ludlum 3030, and Canberra iSolo
2. Same, except we do not currently use the beta on the iSolo 3. Standard QC: daily source & background tests with established bounds - normally +/- 2-sigma. We do not perform chi-square except as part of troubleshooting. 4. All the above listed instruments are in our RP count room. The checks are done daily by RP technicians. The instrument-specific qualifications cover these tasks. 5. For most, it is +/- 2-sigma. The background bounds, in particular alpha, for the gas-proportional counters are fixed limits due to their very low levels. Normally +/- 10% of an established value. For example, the alpha background on the Protean & Tennelecs is about 0.05 cpm, or about 1 count in 20-minutes. Even on additional count in a 20-minute background can cause a 2-sigma test failure and this will happen fairly often. David Brehm Fort Calhoun Nuclear Station Supervisor - Radiological Equipment & Dosimetry Office: 402.533.7582 Cellular: 402.214.0107 Pager: 402.561.3310 From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, September 22, 2011 11:02 AM To: [email protected] Subject: Powernet: Count Room Instruments Palo Verde requests information on the following: 1. What equipment do you use for Alpha smear and air sample counting? 1. What equipment do you use for Beta smear and air sample counting? 1. What statistical tests (LAC) do you perform on your scaler counting equipment, e.g., Chi-Squared Testing, Confidence Interval Testing, etc.? 1. Where / when do you perform long term performance checks, e.g., are after instrument calibration, in the Cal Lab facility or at the use location? Is this a RP Tech function or is a separate qualification required? 1. For daily performance checks, what source confidence levels do you use, e.g., within 2 sigma standard deviation? [cid:[email protected]] Kenneth Walter RP Technical Advisor, Radiological Engineering P.O. Box 52034, Tonopah, AZ 85354, M.S. 7663 Tel 623 393 5482 Pager 877 503 8549 Fax 623 393 6640 [email protected]<mailto:[email protected]> --- 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. ---------------------------------------------------------------------- This e-mail contains Omaha Public Power District's confidential and proprietary information and is for use only by the intended recipient. Unless explicitly stated otherwise, this e-mail is not a contract offer, amendment, nor acceptance. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.
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