You would have already performed forced oxidation and be in open air for max oxidation. Adding a little more to cause things to precipitate out should not be an issue. Common practice. Also used if green colloidal iron comes up which cannot be otherwise filtered....
Glen Vickers, CHP Exelon Corp RP Technical Lead 815-216-2723 (work/cell) From: Powernet <[email protected]> On Behalf Of Dave Raye via Powernet Sent: Friday, March 15, 2019 12:51 AM To: '[email protected]' <[email protected]> Cc: Dave Raye <[email protected]> Subject: [EXTERNAL] Re: [Powernet] Peroxide add to cavity DC Cook has been adding peroxide to our cavities for many years. This has improved our water clarity and eased our Rx Cavity decontamination efforts after drain down. During our past (and current) Baffle Bolt/Up-Flow mod work, we shoot to maintain peroxide concentration around 4 ppm in the cavity. You will not see a crud burst after adding peroxide to the cavity because your RCS is already in an oxygenized state from your S/D peroxide add & subsequent crud burst in addition to having your RCS open to the atmosphere for refueling. Thank you, [cid:[email protected]] From: Powernet <[email protected]<mailto:[email protected]>> On Behalf Of Mosty, Shari via Powernet Sent: Wednesday, March 13, 2019 3:32 PM To: [email protected]<mailto:[email protected]> Cc: Mosty, Shari <[email protected]<mailto:[email protected]>> Subject: [EXTERNAL] [Powernet] Peroxide add to cavity This is an EXTERNAL email. STOP. THINK before you CLICK links or OPEN attachments. If suspicious please click the 'Report to Incidents' button in Outlook or forward to [email protected]<mailto:[email protected]> from a mobile device. ________________________________ Comanche Peak will be adding peroxide to our cavity to aid in cavity decon. Our Operations department has concerns that it could create a CRUD BURST or if poured straight into the cavity a clarity issue. Has anyone ever had an issue with either. Thanks Shari Mosty Sr. Health Physicist Comanche Peak Nuclear Power Plant 6322 N. FM 56 Glen Rose, Texas 76043 254.897.5204 [email protected]<mailto:[email protected]> Confidentiality Notice: This email message, including any attachments, contains or may contain confidential information intended only for the addressee. If you are not an intended recipient of this message, be advised that any reading, dissemination, forwarding, printing, copying or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by reply message and delete this email message and any attachments from your system. This Email message and any attachment may contain information that is proprietary, legally privileged, confidential and/or subject to copyright belonging to Exelon Corporation or its affiliates ("Exelon"). This Email is intended solely for the use of the person(s) to which it is addressed. If you are not an intended recipient, or the employee or agent responsible for delivery of this Email to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this Email is strictly prohibited. If you have received this message in error, please immediately notify the sender and permanently delete this Email and any copies. Exelon policies expressly prohibit employees from making defamatory or offensive statements and infringing any copyright or any other legal right by Email communication. Exelon will not accept any liability in respect of such communications. -EXCIP
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