ML20138A830
| ML20138A830 | |
| Person / Time | |
|---|---|
| Site: | Framatome ANP Richland |
| Issue date: | 04/24/1997 |
| From: | Edgar J SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER |
| To: | Hardin K NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| JBE:97:063, JBE:97:63, NUDOCS 9704280255 | |
| Download: ML20138A830 (5) | |
Text
{{#Wiki_filter:- yorht SIEMENS @M April 24,1997 JBE:97:063 U.S. Nuclear Regulatory Commission Attn: Ms. K.J. Hardin Licensing Branch Division of Fuel Cycle Safety and Safeguards, NMSS 1 Washington, DC 20555
Dear Ms. Hardin:
Siemens Power Corporation (SPC) requests approval to begin construction of a UFe cylinder recertification facility, which willinclude a new exhaust stack, approximately June 1,1997. Construction and testing are expected to take approximately four months with startup targeted 4 for October 1,1997, i 1 Process Descriotion Uranium hexafluoride (UFe) is shipped in 30B cylinders fabricated, tested and inspected in accordance with American National Standards institute (ANSI) standard N 14.1. One of the requirements for a cylinder in use is the periodic (every five years) inspection and recertification to confirm that the cylinder's mechanical characteristics remain consistent with the specifications required to allow transport of UFe. 4 l The periodic inspection consists of internal and external examinations of the cylinder by an inspector who has passed the written examination sponsored by the National Board of i Boiler and Pressure Vessel Inspectors, an ASME Code-type hydrostatic strength test, an air-i l leak test, and a wall thickness measurement. This periodic inspection and testing shall be ) in accordance with the latest edition of ANSI N14.1. Cylinders that pass the periodic j inspection and tests are restamped on the nameplate with the month and year that the inspection and tests were performed. The recertification process includes the following steps which are undertaken after the cylinder has been internally " washed" in another f acility (the UO Building) to remove the 2 UF " heel" that remains in the cylinder after the contents of the cylinder have been introduced into SPC's fuel fabrication process. The new cylinder recertification facility will be capable of handling 11 cylinders at a time. The process will be operated on a batch basis with a maximum of 11 cylinders per batch.
- 1) The cylinder, after internal and external visual examination, is filled with approximately 230 gallons of water and hydrostatically strength tested at 400 psig.
j pFCM i 9704280255 970424 [A D
n K. J. Herdin JBE:97:063 4 April 24,1997 Page 2 L e
- 2) After the cylinder is drained from the hydrostatic test, it is dried and internally inspected with a boroscope.
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- 3) The wall thickness of the cylinder is then measured using ultrasonic testing equipment.
t '4) The valve and end plug are reinstalled, tbo cylinder is pressurized with nitrogen to 100 psig and inspected for leaks. l Facility Descriotion The facility itself will be a 60 foot by 30 foot pre-engineered metal building constructed on a sealed six inch thick concrete pad just to the southwest of the UF. Cylinder Storage l_ Facility. The roof will be sloped standard metal roofing with a nominal eave height at the ] low side of 14 feet. The building shall be constructed with a sealed, insulated exterior system that maintains pressure of not greater than negative 0.05 inch, water gauge, with all doors closed when exhausting 500 cfm of air. j There will be a 1-ton menorail crane from a fork truck airlock to the recertification area. The fork truck airlock and a change room, will be constructed of metal studs and joists covered with gypsum wallboard, finished, and painted. The building air filtration and exhaust system will consist of a pad, supply fan, ductwork, a s L HEPA air filtration unit, an exhaust fan, an exhaust stack, an isokinetic stack gas sampler, instrumentation, and room air monitoring equipment. The supply fan will provide 2800 CFM (2350 CFM will be recirculated) and the exhaust fan will exhaust 950 CFM. 4 The HEPA filters are purchased to Military Specification MIL-F-51068 and are certified by the manufacturer to be 99.97% efficient for removal of 0.3 micron particules. The final exhaust HEPA filter bank is DOS tested after installation to assure 99.95% removal of 0.8 micron particles. HEPA filters have been used in the nuclear industry for many years and at SPC for over 25 years and at SPC for over 25 years. A constant exhaust flow rate will be maintained by a variable speed drive control system on the exhaust fan. Building negative pressure will be controlled automatically by modulating the outdoor air damper on the recirculation system. Each cylinder, when it is brought into the facility, will have been washed, it is expected that the water used to hydrostatically test each cylinder (approximately 230 gallons) will contain a maximum of 125 ppm uranium. At 275 cylinders per year, approximately 30 kgU will be processed through the facility annually or 1.2 kgU per batch of 11 cylinders. Radiation protection, cdticality safety, and environmental safety will be provided as described in chapters 3,4, and 5, respectively, in SPC's license application. The facility will be constructed to local Uniform Building Code (UBC) standards and will be non-combustible, but non-rated for
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- 4 K. J. Hardio JBE:97:063 April 24,1997 Page 3 i
fire. The facility will be equipped with fixed temperature / rate of-rise detectors which trigger the j fire alarm. There will also be manual fire alarms and portable fire extinguishers in the facility, i Enclosed, for your information, are diagrams of the layout of the facility and the airflow (HVAC) system, la the nent few months we will submit an application to amend our license to add the j recertification facility as the location of an authorized activity and we will also submit Part ll descriptive information. If you require further information, please call me on 509-375-8663. i Very truly yours, i is i { e B. Edgar ] j Staff Engineer, Licensing l /p9 { Enclosures 4 1 I i ?
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