In reference to NUREGs 0472/4073/1301/1302, the REMP LLD equation note that Δt is defined differently for REMP as opposed to rad effluents.
NUREG 1301, Table 4.12-1, footnote c defines the REMP LLD Δt as: “the elapsed time between environmental collection, or end of the sample collection period, and time of counting (sec).” This differs from the definition of Δt found in 1301, Table 4.11-1 and Table 4.11-2 footnote a: “the elapsed time between the midpoint of sample collection and the time of counting (sec).” The Comanche Peak ODCM (rev 33), Table 4.12-1 footnote (3) defines the REMP LLD Δt as: “Elapsed time between the midpoint of sample collection and the time of counting(s)” Your ODCM REMP LLD Δt definition differs from the guidance found in NUREGs 0472/4073/1301/1302 as they all use the same definition for REMP LLD Δt. Obviously, this was is a cut and paste error. Jim Jim Key Key Solutions, Inc. 4350 Big Springs Road, Lebanon, TN 37090 615-453-3712 (Office) [email protected] <mailto:[email protected]> 413-403-9805 (e-Fax) From: Powernet <[email protected]> On Behalf Of Michelle.Comolli--- via Powernet Sent: Tuesday, November 27, 2018 10:20 AM To: [email protected] Cc: [email protected] Subject: Re: [Powernet] Benchmark question - HS posting Palo Verde uses elapsed time (end of sample collection period to time of counting). Please let me know if you have additional questions. Thank you, Michelle L Comolli Senior Health Physicist, Radiological Engineering 5801 South Wintersburg Road, Tonopah, AZ 85354-7529, M.S. 7397 Office 623.393.3130 Cell 480.296.1449 From: Powernet [mailto:[email protected]] On Behalf Of Macho, Michael via Powernet Sent: Monday, November 26, 2018 12:08 PM To: [email protected] <mailto:[email protected]> ; [email protected] <mailto:[email protected]> Cc: Macho, Michael Subject: [Powernet] FW: Benchmark question - HS posting ***CAUTION*** ***CAUTION*** ***CAUTION*** This e-mail is from an EXTERNAL address ([email protected] <mailto:[email protected]> ). DO NOT click on links or open attachments unless you trust the sender and know the content is safe. If you suspect this message to be phishing, please report it to the APS Cyber Defense Center at <mailto:[email protected]> [email protected]. I didn’t receive any response to this November 20th powernet so I am trying it again. What environmental LLD Δt do other facilities use for their REMP samples? 1) elapsed time between environmental collection, or end of the sample collection period, and time of counting OR 2) the midpoint of the sample collection period and time of counting ----------- During a Review of our REMP program the following was identified: NUREGs 1301 and 1302 define the environmental LLD Δt as the elapsed time between environmental collection, or end of the sample collection period, and time of counting (see NUREG 1301/1302, Table 4.12-1, notation (3)). This is different from the Δt definition used for liquid and gaseous effluent LLDs, which is defined relative to the midpoint of the sample collection period. See NUREG 1301/1302 Table 4.11-1, notation (1) and Table 4.11-2, notation (1). Michael Macho Radiaiton Protection Comanche Peak Nuclear Power Plant 6322 North FM 56, Mail Code 005A Glen Rose, TX 76043 254-897-5698 (Office) 817-559-1997 (Cell) --- 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.
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