Here is the response I received from Perry White of Mirion as a result of issues we (Duke Energy) were having with water intrusion.
" First remember that with any water proof system, every part must be intact, clean and lubricated as needed to maintain that water proof seal. 1) Inspect the cable for cuts or holes. A penetration through the outer sheath can lead to water intrusion through the connector (cables are pressure tested from the factory). 2) Inspect the connector. Ensure there is a proper o-ring installed (see below), the seal around the pins is intact, and the pins are straight. Also ensure the compression nut to the cable is secure and sealed properly. 3) Clean or ensure clean the threads and seal areas of the connector. Remove any dirty grease with alcohol. 4) Lubricate the O-ring on the connector (See below). 5) Ensure the pins are properly aligned prior inserting the connector into the detector. The pin section of the connector is part of the seal and as such has very little margin or slop but will slide together easily when properly aligned. Do Not Force the connection. Once inserted, hand tighten the connector, push the connections together firmly and tighten again (this is a piston seal not a compression seal so the connectors should be pushed firmly together for the best seal). Never utilize tools to tighten, this can damage the connector. >From Ikelite, they recommend only their lubricant and their O-rings be >utilized: Some non-Ikelite brands of lubricants have been known to cause softening and swelling of our o-rings. We recommend using only Ikelite silicone lubricant on all of our o-rings to prevent potential problems or flooding. Available as part number #0184.1 one 1cc tube or in #5020 package of four 1cc tubes. Thanks, Perry Perry White Mirion Technologies (MGPI), Inc. South East US Sales Manager Office: 770.432.2744 x194 Mobile: 404.642.8584 Email: [email protected] www.mirion.com Bill Byrum, CHP EnRad Laboratories Duke Energy [email protected] Phone 980.875.5811 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, February 08, 2012 9:07 AM To: [email protected] Subject: Powernet: AMP-100 water intrusion DC Cook is evaluating methods to prevent water intrusion into AMP-100 instruments for underwater monitoring. Contract technicians mentioned the use of a non-conductive gel in the o-ring area. For those who are using this, can you provide material type/vendor, and under what conditions it can be used (SFP, cavity, etc)? Elizabeth Emily Associate Health Physicist Cook Nuclear Plant work: 269-465-5901 ext 2545 [email protected] ---------------------------------------------------------------- This e-mail message and all attachments transmitted with it from the Nuclear Generation Group of American Electric Power are for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected] ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected]
