241-SY-101 air lance removal lessons learned
Name: TL Moore/PA Titzler APPROVED FCn t Signature^ / O^ 5~-t' Organization/Charge Code 7EA30/N2444 7. Abstract Lessons learned for air lance and thermocouple tree removal from the 241-SY-lOl tank. Pi^OSE AND USE OF DOCUMENT -This Jocument Mas prepared for use winun the U.S. Departmei^of Energy a^ its contractors.^^t is to be ^sed only to p^rorm, direct, ^^^ integrate J^lrk under U.S. ^oartment of Efjdrgy contracts. Thi^jpcument j^mot approved for pubmc release j^i I reviewed. PATENT ST/^US
... . PATENT ST/^US ^^his document copy, since ^|^|s transmitted in advance of ^jpit clearance, is made availab^^n cNaf idence solely for use ij^^erformance of work und^^ centrals with the U.S. Depa^lment^f Energy. This documen^^not to be ^fclished nor its con^llrts otha^ise disseminated or jped for purposes^lther than speci^€a above be^^e patent approv^rfor such release oi^se has beeo^cured, upon r^uest, from th^^tent Counsel, U.S. Dep^tment oj^nergy Field Office, Richland, DISCLAIMER -This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or any third party's use or the results of such use of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, reconmendation, or favoring by the United States Government or any agency thereof or its contractors or subcontractors. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. 9. Impact Level NA 10. RELEASE STAMP An emergency task was undertaken to remove four air lances and one thermocouple (TC) tree (fabricated from 2" schedule 40 pipe) from tank 241-SY-lOl (SY-101). This resulted from video observation that these pipes were being severely bent during periodic gas release events that regularly occurred every three to four months. At the time, the gas release events were considered to be the number one safety issue within the U.S. Department of Energy (DOE) complex. This emergency removal task was undertaken on an extremely short schedule that required all activities possible to be completed in parallel. This approach and extremely short schedule, while successful, resulted in some undesirable consequences from less than desired time for design, reviews, equipment testing, operations training, and bad weather conditions. These consequences included leakage of liquid waste from the containers to the ground, higher than expected dose rates at the container surface, difficult field operations, and unexpected pipe configuration during removal. In addition, changes to environmental regulations and severe winter weather impacted the packaging and shipping activities required to prepare the removed pipes for storage at the Central Waste Complex (CWC).