ML20009F170
| ML20009F170 | |
| Person / Time | |
|---|---|
| Site: | 07000036 |
| Issue date: | 06/19/1981 |
| From: | Lichtenberger ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY |
| To: | Page R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| 19304, NUDOCS 8107300041 | |
| Download: ML20009F170 (4) | |
Text
_ _ _.
'70 - %
l C-E Power Systems Tel 203/fE3-191:
Combushon Enginecong Inc.
Te!ex 99297 1000 Prospect Hill Road Windsor. Conaccticut oC095 Sh/24/ [d he POWER r., 9 42 3% SS SYSTEMS
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License SNM-33 June 19, 1981 Docket 70-36 Ap p'ica nt......E.......,,,,
U. S. iiuclear Regulatory Conunission Clmk ha 478 Washington, D
20555 Mount / Fcc Cal:2 cry. V d...44 A
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Attention: Mr. R. G. Page, Chief I
Uranium Fuel Licensing Branch DMe Chuk Gec'd. 7/f/ 1.......
Division of Fuel Cycle & Material Safety Receives sy... g.,,,,,
Dear Mr. Page:
It is requested that License hM-33 be amended to allow the storage of dry U02 product in sealed stainless steel cans on five roller conveyors on the north side of the Pellet Facility (Buiiding #255).
Criticality safety is assured through moderation control and is discussed in detail in the attached revised license pages.
In addition, approval is also requested for storage of 5-gallon metal cans of agglomerated press feed on 24 inch centers on a steel mezzanine located above the aforementioned storage renveyors.
Critic 3lity safety analysis results are discussed in this application.
Accordingly, it is requested that the following page changes to License SNM-33 be approved:
Add Page Delete Page 8-7, Rev. 3, dated 6/19/81 8-7, Rev. 2, dated 8/1/75 8-7a, Rev. O, dated 6/19/81 8-8, Rev. 5, dated 6/19/81 8-8, Rev. 4, dated 6/15/76 The minor amendment app'ication fee of $1400. required by 10 CFR 170.36 has been sent directly to tne License Fee Management Branch under separate cover.
Very truly yours, s
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w H. V. Lichtenberger d
Vice President-Nuclear Fuel f
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l 8107300041 810619 i
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.. t 44 8.1.5 Blending Blenders are 14 inches in diameter. The blending operation involves no hydrogeneous material except for the moisture contained in agglo-merated press feed recycled to the mill. The atmosphere is contin-uously monitored for humidity and an increase in moisture will cause an alarm and subsequent cessation of the blending operation. The Nuclear Safety : valuation is provided in Section 9.0 Blenders are arranged on six foot centers forming an inline array and are located at least four feet from other SNM-bearing equipment.
- 8.1.6 Packaging and Storage Dry UO2 product is transferred into stainless steel cans (9.75" 4 X 11" long) in the powder packaging hooas. A maximum of 30 Kg UO2 per can is allowed. A 4 mil poly bag may be used as an inner liner.
If used, it is sealed at the top with tape.
~he can lid is a friction-fit type which is sealed on the outside with tape. This precludes any in-leakage of moisture from atmospheric humidity (the powder is not hygroscopic anyway) or flooding. Thus, the 002 product is kept dry (typically <.05% moisture) and moderation control is assured under all conditions. Section A3 des-cribes all moderation controls in detail.
The sealed cans of dry Uu2 product are then t.ansferred to one of 5 roller conveyors on the north sida of Building #255 as shown in Items 58, 59 and 60 of Drawing D-5008-2001, Sheet 9, Revision 1, dated 5/22/81. The entire building is above the 100 year flood level as determined by the U. ". Army Corps of Engineers in their Special Study for Joachim Creek, dated March 1980.
Even if flooding were possible, the 30 Kg weight of the cans con-taining high density U0 w uld prevent them from floating and being moved.
2 Building #255 is not sprinklered and firefighting would be by dry chemical means. Thus, criticality safety is assured through moderation control (s l
4.1% enriched U0 cannot be made critical without moderation).
2 License No. SNM-33, Docket 70-36 Revision: 3 Date: 6/19/81 Page: 8-7
1,.
8.2 Pellet Fabrication U0 from the conversion process may also be agglomerated and granulated 2
to provide feed for pellet pressing.
After pressing, pellets are dewaxed, sintered, ground and inspected.
They are then packaged for shipment.
Process flow is shown in Figure 8.1.
8.2.1 Agglomeration and Granulation U02 powder from the blenders is transferred to a V-blender having a total volume of 25.7 liters. The blender is mounted on a scale, and the operation is mass limited.
Binders and other materials are added in predetermined quantities. The ogglomerated material is discharged through a hopper to a drying belt which can contain up to a 1/? inch thickness of material. The dry material is then dropped to a 15 liter granulator. This agglomerated press feed is then transferred to a press feed blender or into metal buckets (l'" + x 13" long) equipped wit 5 metal lids (which are tightly sealed with a locking clamp-ring) for storage on f
a 1/4" thick steel mezzanine located above the product storage conveyors.
This mezzanine is 8-1/2 feet above the concrete floor and the buckets are stored in a 13 x 13 array on 24-inch centers. Metal rings are used to maintain this spacing.
The agglomerated press feed contains various hydrocarbon additives with a maximum equivalent moisture content of less than 1% H 0 by weigl*
is 4
2 highly under-moderated array of buckets was analyzed using the KENO ~tv' Code with 16 group Hansen-Roach cross sections. A moisture content of 2%
H O by weight was used which is more than double the actual equivalent mois-2 ture content. Variable density external water mist was then intrnduced to determine the maximum reactivity of the system. A two tier array was assumed to account for interaction with the dry U0 in stainless steel cans stored 2
on the roller conveyors below (see Section 8.1.6).
The array was assumed to be 'nfinite in the horizontal plane. The floor was modeled as an 8 inch thick concrete reflector and a 4" thick concrete ceiling was assumed to be located directly over the array (10 feet above the floor).
The maximum keff of 0.5920 0.0074 at 2o occurred at an external water mist density of.05 gm/cc. Criticality safety of the press feed mezzanine is thus assured under all conditions.
i License No. SNM-33, Docket 70-36 Revision:
0 Date:
6/19/81 Page: 8-7a I
--e.
41 '
Each blender and associated hopper is assigned seven square feet of floor t.rea, thereby permitting one mass in the blender and one in the hopper.
This multiple unit approach is discussed in Section 9.6.
The V-blenders are enclosed in a ventilated hoed having sufficient air i
flow to assure a minimum face velocity of 100 ft/inin.
8.2.2
- Pressing, Granulated material, considered to be homogeneous for criticality safety evaluations, is pneumatically transferred to a press-feed blender. The blended material is pneumatically transferred to the press-feed hopper mounted on.each press.
From this hopper the material is gravity-fed to the press. The pressed pellets are then stacked onto sintering trays.
The press-feed blender is located in the conversion area, and is ovalua-ted as part of that facility. _ Each press consists of a 27.5 liter press-feed hopper having a 9-inch diameter and several sintering trays, having a total volume of less than four litars, Accordingly, each press is 2
assigned a minimum clear area of s reet. Although this spacing is not taken from Table 3-3, it is based on the same cr.teria and constitutes a special unit spacing.
I I
I License No. SNM-33, Docket 70-36 Revision: 5 Date: 6/19/81-l Page: 8-8 L
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