Fermi, same as Matt's response, except for ARMs, which are always at least weekly. If portable survey instrument source response checks are more than than daily, might want to take a look at ANSI N323A-1997, Section 4.8 "....shall be checked with a source during operation at least daily or prior to use....."
Benjy Bertossi Fermi2 - RP Supervisor 734-586-4935 [email protected] From: "Sumrall, Matthew" <[email protected]> To: "'[email protected]'" <[email protected]> Cc: "Tuck, Mahlon O" <[email protected]>, "Rolph, James Thomas Jr" <[email protected]>, "Cole, Tony Allen" <[email protected]> Date: 08/14/2014 01:38 PM Subject: Powernet: RE: Benchmark question on instrument source response frequency Sent by: [email protected] See response from South Texas Project. Note we don’t differentiate instruments for free release from any others. An instrument is either “in use”, “available for use”, or “in storage”, and is documented as such in our instrument tracking application. Any instruments available for use or in use are response checked at frequencies below. Matt Sumrall Sr. Health Physicist STP Nuclear Operating Co. [email protected] (361) 972-4597 From: [email protected] [mailto:[email protected]] On Behalf Of Langille, Elizabeth Ann Sent: Thursday, August 14, 2014 11:32 AM To: '[email protected]' Cc: Tuck, Mahlon O; Rolph, James Thomas Jr; Cole, Tony Allen Subject: Powernet: Benchmark question on instrument source response frequency Benchmark Question Watts Bar is evaluating the appropriateness of our instrument response check frequency. We have listed our current response check frequencies below for instruments not used to perform unconditional release surveys. Instruments that we used to perform unconditional releases are distinctly marked and designated for this purpose and source checked daily. What is your response check frequency for the following instruments? (Excluding instruments used as scalers or instruments used for unconditional releases.) --------------------+--| Name of South Texas | | | Responding Project | | | Plant/Utility | | | - | | | -------------------- ----------------- --------------------+--| | | | | | | | |-------------------+---------------+----------------+-----------------+--------------------+--| Instrument Type | | Example | Source Response | Currently at Watts | | | | | Frequency | Bar | | ---------------+----------------+-----------------+ --| Alpha Frisker | | Ludlum 12 w/ | Daily, or prior | Weekly | | | | 43-92 probe | to use when used| | | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| Area Radiation | | DRM-1 or RDS-31| Prior to use and| Prior to use for | | Monitor | | | weekly while in | the duration of the| | | | | use; however, RP| use | | | | | supervision may | | | | | | approve no | | | | | | additional | | | | | | checks for the | | | | | | duration of use | | | | | | (which is | | | | | | common). | | | ---------------+----------------+-----------------+ --| Beta Gamma Frisker| | Ludlum 3 or | Daily, or prior | Weekly | | | | Ludlum 177 | to use when used| | | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| Continuous Air | | AMS4 | Prior to use and| Weekly | | Monitor | | | weekly while in | | | | | | use. | | | ---------------+----------------+-----------------+ --| GM Dose Rate Meter| | Ludlum 14 or | Daily, or prior | Weekly | | | | E530 | to use when used| | | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| Micro R Meter | | Ludlum 19 | Daily, or prior | Weekly | | | | | to use when used| | | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| Neutron Detector | | Ludlum 12-4 | Daily, or prior | Weekly | | (REM Ball) | | | to use when used| | | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| Portable Ion | | Ludlum 9-3 or | Daily, or prior | Weekly | | Chamber | | RO20 | to use when used| | | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| Telepole/Teletecto| | Mirion Telepole| Daily, or prior | Daily | | r | | | to use when used| | | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| multi use | | RadEye B20 | Daily, or prior | Daily (at one | | | | | to use when used| reading point only)| | | | | less frequently | | | | | | than daily. | | | ---------------+----------------+-----------------+ --| Mahlon Tuck Superintendent, RP Technical Support Watts Bar Nuclear Plant MOB 2U WBN PO Box 2000 Spring City, TN 37381 423/593-9487
