ML20010D815
| ML20010D815 | |
| Person / Time | |
|---|---|
| Site: | 07000152 |
| Issue date: | 08/12/1981 |
| From: | PURDUE UNIV., WEST LAFAYETTE, IN |
| To: | |
| Shared Package | |
| ML20010D814 | List: |
| References | |
| 19519, NUDOCS 8108310574 | |
| Download: ML20010D815 (4) | |
Text
August 12, 1981
..o
~
ADDENDA TO APPLICATION FOR LICENSE SNM-142 RENEWAL TO POSSESS AND USE SPECIAL NUCLEAR MATERIAL (Dated May 14,1981)
Reference Delete Add Page 2 & 4 Spend fuel rods Spert fuel rods Page 5 a.
Duncan Annex Storage fac-a.
Duncan Annex Storage facility: SNM are stored 111ty: SNM are stored in Room in two locations in Duncan Annex which is attached B-84 of the Duncan Annex which to the Electrical Engineering Building.
The is attached to the Electrical building is constructed of steel frame with Engineering Building.
The concrete and brick and no window openings. The 1
" torass room is approximately storage room B-84 is approximately 18 ft. 4 in.
18 ft. 4 in, by 30 ft. 8 in.
by 30 ft. 8 in, by 23 ft. high, as shown in by 23 ft. high as shown in Figure 2 and 3.
The floor. level is about 9 ft.
Figure 2 and 3.
The floor below the outside ground level.
level is about 9 ft. below Enriched 00 fuel (1.3%) is stored in room 2
the outside ground level.
B-84.
The 1.34 m (54 in.) long fuel rods (active The building is constructed fuel length 1.22 m) are stored in six steel of steel frame with concrete cabinets arranged in two adjacent arrays of and brick and no window open-three cabinets each.
The cabinets, designed to ings.
hold the rods vertically and in a slab geometry are fastened to the walls of the room.
The Orr:r.;;m:r.t i: showr in the accompanying figure.
The controlling limit on k of each array is eff determined by the slab thickness.
The ANSI N 16.1 - 1975 Standard recommends a maximum thick-ness of 20 cm for 1.3% oxide fuel. The actual thickness of the storage geometries is about l
14 cm. (5.5 in.).
Room B-84 also contains a natural uranium l
metal graphite suberitical assembly with a keff of 0.642. Any extra fuel from the graphite l
assembly is stored in a cabinet on the wall behind the subcritical assembly and at least l
4.5 m from the nearest cabinet containing 1.3%
enriched fuel.
The storage room B-77A is approximately i
8108310574 810812 PDR ADOCK 07000152 1.L'[il.')
C PDR
~
Reference Delete Add Page 5 9 ft x 8 ft x 8 ft 10 in, as shown in Figure 3.b.
(cont'd)
Enriched UO fuel (4.8%) is stored in room 2
B-77A in two metal racks, designed to hold tne rods vertically and in a slab geometry.
The spacing between the rods and the thickness of the slabs is maintained by the use of top and bottom grid plates.
Using the ANSI N16.1-1975 Standard (Fig. 3, page 5) as recommended in Nuclear Reg. Guide 3.4, the maximum safe thick-ness of the fuel in the racks is 8.7 cm.
Each fuel rack is about 2.70 m (8 ft.10 in.)
long with an active fuel height of 91.4 cm (3 ft.)
The two fuel racks are fastened to the opposite walls of the fuel storage room and are separated by a distance of 1.98 m (6.5 ft.).
Page 6, aftec line 14 The FBBF in Room B-28 is provided with a supply of ventilation air blown in through three r.iucts fed from the existing main supply plenum in the Physics Building basement hallway.
This air is a mixture of outside air and recircu-lated air from other parts of the building.
Low Leakage dampers on tnese cucts close automa 1-cally if the radiation monitors in B-28 alarm, if the filter for B-28C fails or is blocked, or if the fan for B28C fails.
They may also be closed manually.
Of the air blown into B-28, 500 to 600 cfm (about one-third) is exhausted through B-28C by a continuously running suction fan located in the building attic.
The duct f r'..n B-28C to the fan includes an HEPA filter system.
B-28C is maintained at more than 0.05" W.G. static pressurc below B-28 by the fan (except when the door from B-28 to B-2BC is open - then the flow continues butthepressuredifferencedisappears).
The flow from B-28 to B-28C is primarily around I
_z
r.
a Reference Delete Add Page 6, the door frame when the door to B-28C is closed.
after line 14 The shielded hood located in B-28 draws its (cont'd) ventilation air supply from B-28.
A fan, located in the buildira attic, pulls a nominal 450 cfm in through the hood openings (hatches). A HEPA filter is provided in the connecting duct work.
The use of the hood is intermittent but the fan and filter can run continuously drawing air from B-28 through a relief damper. The face velocity at open hatches is set to a minimum of 100 fpm by administrative 1y controlling the maximum number of hatches that may be open at any time.
It should be noted that all the ducts are at negative pressure with respect to their surroundings (uptothefandischarge).
Both absolute filters are housed in B-28 together with the pressure and flow minitoring equipment.
Both fans exhaust to the outside through vents located on the roof of the main portion of the Physics Building.
If the dampers un Li e u u u i.3 'u B-25 cluse, for one of the reasons given above, the vents on the window also close.
Then either B-28 (and B-28C) are essentially stagnant and iso:ated or, if the fan exhausting B-28C is running, they will be belcw the butiding and outside air j
pressures and leakage will continue to be into B-28C (and out through the HEPA filters).
l l
l Page 21 No refresher training course Refresher training will be provided to FBBF is planned for personnel personnel and selected Radiation Control Personnel since their usual stay at every 12 months (not to exceed 15 months).
The j
the University if limited above training will consist of a minimum of a to a time span that precludes one hour seminar. Tonics covered in the seminr the need for retraining.
will include but will not be limited to:
l L
Reference Delete Add Page 21
- 1) Type of work performed (cont'd)
- 2) Location of work and materials
- 3) Review of work procedures
- 4) Review of worker's responsibilities
- 5) Review of emergency procedures
- 6) Review of security procedures
- 7) Statement of procedural changes Page 21, Both of the feel storage rooms in Duncan after line 22 Annex are in the basement; the greatest conceived danger might occur if the area flooded. However, such an event has not occurred in the more than 40 year history of the building, and all of the recommended limits in ANSI N16.1-1975 assume a floodedconditionwithinfinite(30cm) water reflectors.
The fuel is only stored in the Duncan Annex and no operations involving handling of the fuel is anticipated with the possible exception of transfer to Fast Breeder Blanket Facility.
Two criticality dosimeters, similar or equivalent to Reactor Experiments type 708 dosimeters, con-taining six activation foils and a thermolumi-nescent dosimeter, will be used to monitor the storage areas in Duncan.
The locations of the dosimeters are in Rooms B-77 and B-79 (see Figure 2).
After Page 24 Page 243:
Figure 3a:
Room B-77A t
O
- 24a.
r ~-~~
A t
I LI._...
A
,I A
. -. g yg
- s I
l i
IM N
2 l
A v
n.
q
.4 u,
(y s) 3 A
03 s
,/
(
i,
=
0
.'h
/
o
/
L F i
V 18
}
11 I
9 1
\\
1 h
t 9
l oi D.
n eb S-s,
N 31 w
na th 1.
Figure 3a:
Room B-77A t