Palo Verde provides the following response:
> RCA Tool Control and Decontamination of Tools 1. What type of decontamination facility is used for tool decontamination? We have an actual Decon Laundry Building designed for decontamination purposes. The building has a spray booth, ultrasonic sink, all liquid wastes are collected are pumped to the liquid radwaste system for processing. The building has a receiving area for bagged and contaminated equipment and a large laydown area for decontamination preparation work. The building has a stainless steel decon spray booth, where large assemblies can be washed down by means of steam or high pressure liquids in an enclosed, controlled environment. The exhaust is ducted to the filtered exhaust HVAC system. There is also a stainless steel work bench and sink for decontamination of small items, an ultrasonic cleaning system consisting of ultrasonic generator and immersible transducers and two 4-foot x 4-foot x 3-foot deep stainless steel tanks, a liquid abrasive decontamination unit, and a large area for storage of tools and decontamination supplies. Additional, each unit has a Hot Machine Shop with a decontamination spray booth similar to the one in the decontamination facility, an ultrasonic cleaning system and a 2-foot 6-inch x 12-foot x 3-foot deep stainless steel dip tank; a portable pressure washer and a steamerette for equipment decon. 2. What types of tools are most frequently released from the RCA? (I&C instruments/torque wrenches or gauges, Specialty tools, etc.) As a matter of policy, we do not allow common tools to be released from the RCA. We allow specialty tools, e.g., I&C equipment, torque wrenches, M&THE gauges, etc. 3. What are the fixed and smearable limits for tools and equipment maintained in the RCA? 20k fixed, < 1k loose. How are tools surveyed for fixed contamination prior to their return to the RCA Tool Room - i.e. SAM-9, Cronos-4, frisked, or other method? Tool monitor Is there a different fixed contamination limit for Containment vs. Auxiliary Building tools? Yes 4. For Tools used during refueling outages, are they just stored for the next outage or are they deconned and put back into use in the RCA? If stored, how are the tools and equipment stored? Following outage activities tools are decontaminated as needed and returned to storage, typically in Sea Vans. We set up a Containment Building access area on ground level outside of the lower personnel access hatch. The Sea Vans are staged, stacked (2 high) and a temporary tent enclosure is built around them. We extend the Containment Building CA to include this area. 5. How are safety harnesses (i.e., fall protection) controlled? Does the plant designate specific harnesses to be used in "contaminated" areas and different harnesses for "clean" areas? What are the contamination limits (fixed and loose as applicable) for harnesses used in clean and contaminated areas? Harnesses are segregated for use as either in a contaminated area or clean areas within the RCA. For clean areas, no detectable contamination is allowed, for harnesses used in contaminated areas < 20k fixed, no loose. 6. What process is used for tool decon? Hand decon, Ultra-sonic sink, plas-blast or grit blast unit, or pressure washers? All of the above. 7. Are Advanced Radworkers (ARWs) allowed to survey and release tools and equipment, or only RP Technicians? Only qualified Sr. RP Technicians 7. Contaminated Calibrated tools - how are they stored? Is there a "hot" calibration lab in the RCA? Does the plant conditionally release "fixed" contaminated calibrated tools from the RCA to be re-calibrated in the protected area? Each unit has a hot calibration facility. If the item cannot be calibrated in the RCA we conditional release process to allow calibration at our central cal facility within the Protected Area. Seth. ********************************************************************** Seth J. Kanter, CHP, RRPT Sr. Health Physicist Palo Verde Nuclear Generating Station Mail Sta. 7397 5801 S. Wintersburg Rd. Tonopah, AZ 85354 Phone (623) 393-3130 Fax (623) 393-1853 Unless otherwise noted, all opinions are my own Liviu Librescu ********************************************************************** From: [email protected] [mailto:[email protected]] On Behalf Of Barber, Jerry Sent: Friday, May 27, 2011 5:33 AM To: [email protected] Subject: Powernet: Robinson Benchmark - RCA Tool Control and Tool Decontamination Sorry for having to repost, I forgot to include the Subject Lot of great benchmarks on Powernet right now, here's another. Good friend of mine needs help with his, please help if you can.......thanks! > RCA Tool Control and Decontamination of Tools 1. What type of decontamination facility is used for tool decontamination? i.e. Kelly enclosure type building, stainless steel decon room/trailer, or other type decon facility. 2. What types of tools are most frequently released from the RCA? (I&C instruments/torque wrenches or gauges, Specialty tools, etc.) 3. What are the fixed and smearable limits for tools and equipment maintained in the RCA? How are tools surveyed for fixed contamination prior to their return to the RCA Tool Room - i.e. SAM-9, Cronos-4, frisked, or other method? Is there a different fixed contamination limit for Containment vs. Auxiliary Building tools? 4. For Tools used during refueling outages, are they just stored for the next outage or are they deconned and put back into use in the RCA? If stored, how are the tools and equipment stored? 5. How are safety harnesses (i.e., fall protection) controlled? Does the plant designate specific harnesses to be used in "contaminated" areas and different harnesses for "clean" areas? What are the contamination limits (fixed and loose as applicable) for harnesses used in clean and contaminated areas? 6. What process is used for tool decon? Hand decon, Ultra-sonic sink, plas-blast or grit blast unit, or pressure washers? 7. Are Advanced Radworkers (ARWs) allowed to survey and release tools and equipment, or only RP Technicians? 7. Contaminated Calibrated tools - how are they stored? Is there a "hot" calibration lab in the RCA? Does the plant conditionally release "fixed" contaminated calibrated tools from the RCA to be re-calibrated in the protected area? --- NOTICE --- This message is for the designated recipient only and may contain confidential, privileged or proprietary information. 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