Damaged fuel where the cladding is breached won't have any noble gas to escape.
We've done many pool side exams of failed fuel. We already have industry processes of surveying tools underwater, lancing underwater, and surveying as tools come to the surface. We always apply the same survey standard, so I'm not really sure what actions would be diff. I suppose you would have a specific RWP, but the survey actions are the same. During inspection or disassembly of a compromised bundle, you should expect pellet fragments and cladding, so you'll want to have a bucket below. Small high dose rate fragments from fuel/clad wouldn't be any different than that which occurs during cutting and processing activated metal underwater. When you're unloading the core, you won't know the bundle is damaged, so the note about failed fuel won't be done during defueling and you won't be putting it back in. The only time it would come into play is during damaged fuel exams. Glen Vickers, CHP Exelon Corp RP Technical Lead 815-216-2723 (work/cell) From: Beth Heyeck [mailto:[email protected]] Sent: Monday, April 03, 2017 2:05 PM To: [email protected] Subject: [EXTERNAL] [powernet] Damaged fuel risk level D.C. Cook is reviewing our current radiological risk levels. Looking at IER 11-41, it states under PWRs that removing irradiated hardware from the water/shielding in the reactor vessel, cavity, or spent fuel pool should be considered a high risk task. There is a note that states "This does not apply to moving fuel unless the fuel is damaged". 1. Do you consider moving damaged fuel to be a high risk radiological task? 2. How do you define damaged fuel (missing, leaks, etc)? 3. Do you assign a risk level to moving fuel that is not damaged? Elizabeth Heyeck Health Physicist Sr D.C. Cook Nuclear Plant [email protected]<mailto:[email protected]> 269-466-2545 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
