ML20141H061
| ML20141H061 | |
| Person / Time | |
|---|---|
| Site: | Framatome ANP Richland |
| Issue date: | 07/15/1997 |
| From: | Edgar J SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER |
| To: | Weber M NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| JBE:97:121, NUDOCS 9707210114 | |
| Download: ML20141H061 (9) | |
Text
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July 15,1997 JBE:97:121 U.S. Nuclear Regulatory Commission Attn: Mr. Michael F. Weber, Chief Licensing Branch Division of Fuel Cycle Safety and Safeguards, NMSS Washington, DC 20555
Dear Mr. Weber:
Ref.:
Letter, J.B. Edgar to K.J. Hardin, dated May 22,1997 in the referenced letter Siemens Power Corporatior: (SPC) requested an amendment to Table l-4.1 in its materials license to add the usa of a neutron absorber as a cr!ticality safety controlin smaller than five gallon containers. Cucrentiv such absorbers are specified for 45 gallon drums.
Subsequent discussions between SPC persowel and members of your staff have made it clear that more explanation of the bacis for this request is needed.
SPC ships enriched UO powder and pellets to Japan in the NT-IX shipping container under the 2
terms of a Japanese certificate, J/113/AF-85, which is currently revalidated for import / export shipments under revision 6 of USDOT Certificate of Competent Authority USA /0442/AF-85.
The UO is contained in pails that fit inside the NT-IX. The Japanese have issued revision 4 to 2
J/113/AF-85 which increases the amount of UO allowed in the pails by requiring that a boron-2 stainless steel sleeve be used in the pail such that the contained UO is inside the sleeve in the 2
pail (see the enclosed Attachments 1 and 2 of the container arrangement and the installation of the sleeve from J/113/AF-85, rev. 4). SPC has applied for USDOT revalidation of J/113/AF-85, rev.4 and the NRC's Cask Certification Section is reviewing it at the DOT's request. We
- anticipate revalidation by September 1,1997.
SPC has a shipment planned for October 1997 for which we must begin loading of pails approximately July 21. A Criticality Safety Analysis (CSA) has been prepared and is currently undergoing second party and final management rev!ew. This CSA supports loading the pails with the quantities allowed in revision 4 of the. oanese certificate. The pails, after having j
been loaded, will for some period of time, be stored outside the NT-IX shipping containers prior tf; to their being loaded into the NT-lX's. This storage is necessitated by the fact that NT-lX outer containers may be in use for ather shipments and therefore not available to load pails into at the time the pails were loaded with UO. In addition, even if NT-lX outer containers are available, 2
some lag pail storage is required by virtue of the loading process. The CSA supports the required storage array and demonstrate that it is adequately suberitical under normal and ll1lllllllllllllllllllllllllllllll Siemens Power Corporation Nuclear Division 2101 Horn Rapids Road Tel:
(509) 375-8100 Engineering & Manuf acturing P.o. Box 130 Fax:
(509) 375-8402 Richland, WA 99352-0130 9707210114 970715 E
PDR ADOCK 07001257,
C PDR
~ _ -
Mr. Michael F. Weber JBE:97:121 July 15,1997 Page 2 accident conditions. Accident scenarios include UO mass violations, moderator control 2
violations, and spacing violations (both within the array and from interaction with other in-transit material.) Spills are also considered.
In accordance with SPC's materials license, the CSA will be completed (including second party review and the required approvals), the proper application of required controls confirmed, procedures written, and training accomplished prior to packaging the increased amounts of UO 2 allowed by the use of the boron-ss sleeves. In addition the presence of the required concentration of boron in the sleeve will be confirmed prior to use. More detailed criticality safety _information to support your staff's review of this amendment request is attached as 1
Attachments 3,4 and 5.
I trust this added information sufficiently enhances your understanding of our amendment request such that review of the request can be expedited to allow us to meet the schedule described above.
i If additional information is required, please call me on 509-375-8663.
Very truly yours, Jam
. Edgar i
Staff Engineer, Licencing l
. +. - =.
Reference J/113/AF-85(Rev' 4)
ATTACHMENT 1 Page 6 of 7 Pages Fastening device Outer cover y
(includes gasket)
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Upper heat insulator
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.5l[:'!,: Lid C o Gasket = o o o Bolt ([' 'v Outer container drum can s j Q Q' :: 1.: Powder container .\\ ..N.' N / e G /9'.\\ Inner container drum can hh jk f ~ \\ ! M.).- 'p , K.j Heat insulater \\ / (.j i 6 577 Unit mm e-Figure 1 filustration of the type NT-lX package
Rafaene J/113/AF-85(R;v, 4) ATTACHMENT 2 Page 7 of 7 Pagss Fastening device for powder container s Cover of powder container A !&7 / /IN\\ UO2 powder 3 Boronated stainless steel ring U )) \\tg gl d Pcwcer ccntainer t Figure 2 Conditicn installed bcronated stainless steal nng
ATTACHMENT 3 NT-IX Inner Container Criticality Safety Summary information: Package Dimensions: see attached drawings. Borated insert: see attached drawings for dimensions. Chemical composition: Baron: 1.0-1.3 % by weight. ("B assumed to be in natural isotopic abundance) Ni: 9.0-13.0 % by weight. Cr: 18.0-20.0 % by weight SPC inner container model dimensions 287 mm (11.3") inside diameter prior to adding the borated SS insert and 206 mm (8.11") inside height from the bottom of the container to the bottom side of the recessed lid. The borated SS insert is 2.0 mm ( 079") thick, the SS304 wall and lid are 1.2 mm (0.0472") thick. SPC mixture model for the Borated SS mixture in the base cases: arbmss304 7.870 41 01 50001.0 26000 68.0 2400019.0 2800012.0 31.0 293.0 end Cross sections used: 27 group cross sections were used with some comparisons to Hansen-Roach 16 group cross sections. Additional Considerations: The current license permits using containers with a volume of 5-gallons or less with controls on any or all.of the following:
- mass, moderation, spacing of containers within and between arrays.
The current license also permits the use of fixed neutron absorbers in the following locations: 45-gallon drums used to store dry powder. B C and PVC inserts in tanks. 4 Boral sheets in bundle storage. The requested amendment is simply requesting permission to add the use of a fixed neutron absorber to the list of controls that may be used with containers of 5-gallon capacity or less. The NT-IX loading station is currently interlocked so that the filling process stops when the mass allowed in the container is reached. When loading containers with the borated SS inserts is approved, the scales will also be interlocked so that the container cannot be filled unless the container tare weight corresponds to a container with the insert. The ends of the borated SS inserts have also been colored red with a metal marker to facilitate visual verification that the inserts are present in the inner container before they are filled. Normal storage is in a single tier array.
Normalloading operation allows stacking inner containers 3 high. A maximum of 9 stacks are. allowed. These stacks must be centered on 25"x25" steel pallets and must be attended until loaded into the overpack. I l q 1 i I i l
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i o 3 R t ATTACHMENT 5 i a i.On !Al l 1.0 7.067 '.'039 l [ - 000 i 180.0 [hD D L GENERAL NOTES: uNtESS OTHERWiSE SPtCnD FR AC TIONS DECIMALS ANGULAR 21/32 .X t.1 2 t* 12 5 .X X t.01 SURFACE TEXTURE .XXX2.005 TCP OIMENSIONS ARE IN INCHES /8OTTOM DIMENSIONS ARE IN MILLINETERS. 1. CIMENSIONING AND TOLERANCINC PER SPC PROCEDURES & PRACTICES. 2. BREAK SHARP EDCES AND REMOVE ALL SURRS. J. M A TERI AL:AS SPECIFIED OR APPROVED EOUAL. I 4 WELD SYMBOLS PER AWS A2a-1986 (WELO SIZES ARE MINIMUM). 5. E ACH SLEEVE WILL BE IN0lV100 ALLY STAMPE0 WITH A UNIOUE 5 ClG3T SERIAL NUMBER, % INCH NCH,0N THE OUTSIDE SURFACE BEFORE ROLLINC. 6. THE TOP EDGE OF EACH SLEEVE WLL BE COLORED RED FOR IDENTIFICATION PURPOSES WITH AN INDELIBLE MARKER. C 7. 8. DIAMETER OF R!NG AND TOLERANCE WILL NOT APPLY WITHIN lihCH OF EACH S!DE OF THE WELD, WHERE SOME FLATNESS DUE TO ROLLING WILL RESULT. O 9. WELD JOINT MISALIGNMENT SHALL NOT BE CREATER O THAN.030 INCH. O 10. FuS:0N WELD iS REcuiRED ON SOTH $10ES WITH NO SHARP EDCES ON SVRFACES. O 3.0 MIN \\ / I
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