ML20072P801
| ML20072P801 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 05/17/1994 |
| From: | Randy Hall NORTHERN STATES POWER CO. |
| To: | |
| Shared Package | |
| ML20072P786 | List: |
| References | |
| PROC-940517, NUDOCS 9409080223 | |
| Download: ML20072P801 (11) | |
Text
_
ATTAC10iENT 2 MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 TITLEr l INSTALLED ATCOR SOLIDIFICATION Revision 8" l
SYSTEM Page 1 of 11 i
i i
Prepared By: g,M Date: g/u/pp Reviewed By: M jffgd Date: f/p[/f4 OC Review Req'd:
YES OC Meeting Number:
/9tl0 Date: 05/p1/g Byj,3fg gj/ M Approved By:
Q)g/g Date:
f V}
%dX,WD:Tdfrited1F6JWW'iJ276,JFOR ADMINISTRATIVE'USE'Of4LEh4#uTF7.@M&lc: msM??M 00NF.
l
- This is first time on Technical Processing System (TPS) and sidelining is as indicated below:
A Significant changes are sidelined by Preparer.
Thl re.viriu inc,rt ordes 30F7 9 2 ~l%3 Major re-write. Changes are not sidelined.
Reso Suov-STSE l Assoc Ref; B.7.3 lSR: N Frea: 2 yrs ARMS: PCP 2.0 l Doc Tvoe: 76 6'2 l Acman Initials:
Date: 6//7/9d 9409080223 940829 PDR ADOCK 05000263 R
MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 TITLE:
INSTALLED ATCOR SOLIDIFICATION Revision 8*
SYSTEM Page 2 of 11 TABLE OF CONTENTS PAGE SECTION 3
1.0 PURPOSE 3
i 2.0 A P P LI C A B I LITY...............................................
3
3.0 REFERENCES
3 4:0 DESCRIPTION OF SYSTEM 4
5.0 SYSTEM OPERATION................
5 6.0 CURE TIME...
5 7.0 VERIFICATION OF SOLIDIFICATION..
8.0 SAMPLE SOLIDIFICATION OF SPENT RESINS AND FILTER MEDIA.
5 8
9.0 FIGURES 8
9.1 Solid Radwaste Block Diagram...
9 9.2 Sample Verification Form 10 9.3 Sample Verification Form...
11 9.4 Sample To Container Worksheet.
m 1
k l
1 1/smk
MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 TITLE:
INSTALLED ATCOR SOLIDIFICATION hevision 8-SYSTEM Page 3 of 11 1.0 PURPOSE To establish the process parameters which provide reasonable assurance of complete solidification of spent resins and filter media.
Instruction step identified with a "$"in Subsection 8.1 SHALL be satisfactorily completed to meet NRC commitment M83039A roquirements. If this step cannot be satisfactorily completed, contact the radiological services engineer.
2.0 APPLICABILITY This section of the PCP is applicable to solidification of spent resins and filter media, using the ATCOR Solidification Systems and related equipment.
3.0 REFERENCES
3.1 Operations Manual B.7.3 (SOLID RADWASTE) 3.2 ATCOR-Solidification System, Part I, Operating Instruction, NSP Manual NX 10392-16.
3.3 NRC Commitment M83039A.
l
4.0 DESCRIPTION
OF SYSTEM The solidification systern mixes moist radioactive wastes with dry portland cement and feeds the resulting mixture into a standard or acceatable shipping containers. The major components of the system are described be ow and shown in FIGURE 9.1.
Detailed operating procedures are provided in the System Operation Manual.
4.1 Waste Conditionina and Meterina The waste conditioning subsystem receives the solid wastes, adjusts its moisture content to assure a proper cement mixture, and meters the conditioned waste into the Mixer / Feeder unit for subsequent mixing with cement.
Solids from the centrifuge are added to a premeasured amount of liquid in the waste hopper until a predetermined levelis reached. This results in a sludge with the proper moisture content suitable for mixing with cement.
The waste is fed to the Mixer / Feeder by means of an open throat positive displacement pump located directly below the hopper. The pump speed can be adjusted from the control panel. The flow rate is approximately 1 cubic foot per minute.
1/smk
' MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 TITLE:
INSTALLEl7ATCOR SOLIDIFICATION Revision 8*
SYSTEM Page 4 of 11 4.2 Drv Cement Storage and Metering Dry cement is loaded into a 75 cubic foot capscity cement bin by means of a bucket elevator fed from a bag dump station. The cement bin is equipped with a self-contained vibrating bin bottom for positive and continuous flow of cement.
From the bin, the cement is fed to the Mixer / Feeder through a combination of two screw feeders at approximately 1 cubic foot per minute.
4.3 Product Mixina and Package Filling The combined waste product and dry cement are introduced to the Mixer / Feeder simultaneously. While the materials are being conveyed to the drum feed pipe, l
the screw flight and paddle arrangement within the Mixer / Feeder insures a l
thorough mixing action.
1 After completion of the filling operation, the full drum is ready to be conveyed to the capping station and storage areas utilizing the radwaste conveying system l
and controls.
4.4 Controls Controls for the solidification system are contained on a panel shielded from the waste materials.
Gauges indicating feed rate of cement and waste liquid are located on the i
control panel.
The levelin the hopper is monitored by a television camera. The monitors are located in the Radwaste Control Room and near the ATCOR panel, The filling of the barrels can be viewed through view ports with the use of mirrors.
Rates of cement feed and liquid feed are adjustable from the control panel during processing.
5.0 SYSTEM OPER ATION To ensure a representative sample of waste is obtained the phase separator should be put on recycle for approximately 20 minutes prior to drawing a sample.
i Once the sample is obtained, it is analyzed for isotopic content and pH. If pH is greater than 5.0, no adjustments need be made, if the pH is less than 5.0, it must be increased to between 5.5 and 7.0 with the addition of lime. Adjustments to pH, if required, should j
be made to the liquid to be added.
)
After sampling, the spent resin is centr.ifuged into "B" hopper, which already contains a specific amount of liquid (pH adjusted, as necessary) for solidification. Solidification is then verified.
I/smk
MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 TITLE:
INSTALLED ATCOR SOLIDIFICATION Revision 8' SYSTEM Page 5 of 11 6.0 CURE _ TIME Cure time is norrnally 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
il 7.0 VERIFICATICN OF SOLIDIFICATION l
I
'i Representative barrels of each batch are to be inspected to verify solidification and the absence of free water. A drum may be considered solid when the cemented mass offers significant resistance to penetration by a hammer, or similar object. Absence of free water may be determined visually. The drums are capped and stored for burial.
IE solidification fails to take place, THEN the process shall be suspended until the cause is determined and remedies are defined.
8.0 SAMPLE SOLIDIFICATION OF SPENT RESINS AND FILTER MEDIA S 8.1 Samoiina Reauirements Sample solidification shall be conducted for at least every tenth batch of spent -
resins and filter media.
8.2 Prerecuisites Before drawing a specimen from a phase separator for sample solidification, the contents must be adequately mixed to achieve a representative mixture.
8.3 Samole Precaration Obtain a sample from a phase separator in the required volume. The volume required will be approximately 200 ml for each sample mixed.
NOTE:
Depending on dose rates, a smaller sample may l
be used, l
i 8.3.1 Place the waste sample in a beaker, and record the volume of the waste l
sample in the beaker on FIGURE 9.2.
l
[
8.3.2 Check the pH of the mixture and record this on FIGURE 9.2.
!E the pH is less than 5.0, THEN notify the' radiological services engineer. Normally, the pH of the l waste sample is about 6.0.
8.3.3 Additional samples may be mixed from the initial test specimen at the discretion of the radiological services engineer using additional mix l
ratios. The following table defines the mix ratios which stould be used:
l i
l l
l l/smk
l i.
MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 TITLE:
INSTALLED ATCOR SOLIDIFICATION Revision 8*
SYSTEM Page 6 of 11 l
Table 1
.LWastem a WNolume 2r ~/Volumei 2 WWei ht?.
c: Estimated..
- Estimated :
fnin; F ame pr sgsingtsa M D s wai std:
ra
%Ty'ps$.y $I.Qf52}$ !!$E@ihsHfM
. MMd C 1 W sti j?2: Fe dCsihentM MVoldnies MQibs/ft3 5.E w-
-.[h6 5MI)M5EE b.[(h)3fh5 N5(h[N ONk(f5I)Y M Eb$$50N I
Bead Resin 200 200 218 266 96.8 Solka Floc /
Filter Aid (including 200 200 218 266 83.3
- Powdex, Ecodex, Etc.)
i 1.
For Masonry Cement V roduct = /3 Vcernent + Vwaste P
2.
Waste / Cement Ratio's for Solka Flock Filter Aid, Bead Resin, Etc.: W/C = 1.0.
3.
Solka Floc or Filter Aid Bulk Density is 27 Lbs/ft3 @ 60% moisture, conditioned waste 3
density 43 Lbs/ft.
Bead Resin Bulk Density is 45 Lbs/ft3 @ 50% moisture, conditioned waste density 61 Lbs/ft3 8.3.4 Place the required amount of cement in a beaker and add half of the waste sample to the cement and mix to ensure homogenity, l
l THEN add the remainder of the waste sample to the cement, mixing l
continuously.
8.3.5 Cover and store the sample in a shielded area.
8.3.6 Observe the sample at the following intervals until solidification is complete. Record the results on FIGURE 9.3.
NOTE:
Some water may appear on the surface and be re-absorbed during solidification.
l A.
1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />
- Visual inspection lor settling with free water on surface.
B.
4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />
- Visualinspection for free water on surface.
C.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> - Visualinspection for free water on the surface. Probe with stirrer to check for hardness. Repeat this step at 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> intervals until the probe will not penetrate the sample billet. When hard, no free water is allowed on the surface.
l l/smk
(
MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 TITLE:
INSTALLED ATCOR SOLIDIFICATION Revision 8*
SYSTEM Page 7 of 11 8.3.7 Set the sample aside for future disposal.
8.3.8 Complete FIGURE 9.4 before proceeding with the full-scale solidification.
8.4 Samole Acceotance Criteria 8.4.1 Visual inspection after mixing will confirm that the sample is homogeneous.
8.4.2 Visual inspection of the sample after curing will confirm that no free water exists on the surface of the sample.
8.4.3 Physical inspectiori of the sample after curing will confirm that the end product is a uniform, liquid-free, free-standing solid that resists penetration when probed with a pencil-sized probe.
8.4.4 IE test samples from the initial specimen fail to produce a mixture which will solidify, THEN additional specimens SHALL be drawn and mixed to determine the proper solidification parameters before fullscale solidification can commence.
Additionally,IE test samples from the initial specimen fail to produce a mixture which will solidify, THEN sample solidification of specimens from successive batches SHALL be conducted until at least three samples from consecutive batches demonstrate solidification.
t I
l l
f 1/smk
(o O
d
'g CONDENSATE R
x DEMINERALIZER l3 m d BACKWASHES 0
Q
=
C r11 F
FUEL POOL FILTER BACKWASHES T
h O
RADWASTE FILTER BACKWASHES Z
CONDENSATE
@ C SPENT i
H O PHASE 1r 1r y RESIN y> &
{ $
SEPARATORS TANK WASTE (2)
SLUDGE e
A D O Q TANK a
M 1r
(/)
W M
-< O D o
mO b
=
O-
_.{ D d REACTOR CLEAN-UP y
Ag o.
I EO PHASE y
Q I"" r'-
SEPARATORS C
6 h (2)
R I
S m
n s a3 O
LIQUID o
3r
$*D S
~d a
o f
Z SOLIDS
'T Y
3 LIQUID g
HOPPER
- TO VENDOR g-P DECANT TO LIQUlO RADWASTE y
T 6'
SOLIDIFICATION U
MIXER FEEDER SYSTEM (IF USED)
- 9 p
1r CEMENT
~
i d
o i
I p
]
m 55-GAL DRUMS
~
=wuwow 4
MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 j
TITLE:
INSTALLED ATCOR SOLIDIFICATION Revision 8" SYSTEM Page 9 of 11 i
FIGURE l
9.2 Samole Verification Form j
Rad Prot Spec:
Date:
l
- Waste Type:
Temp:
i 4
NOTE: Attach Isotopic of Waste Stream to this form.
SAMPLE PROPORTIONS Sample No.:
Amount S
- Sample Waste Volume ml 3
S
- Sample Cement Weight g
2 S3 - Solidified Sample Weight g
S
- Solidified Sample Volume ml 4
S - Solidified Sample Density (S /S )
g/mi l
S 3 4 (Waste pH
)
4 (Waste Temp.
)
1 MATERI AL RATIOS j
Se - Ratio of Waste Volume to Final Volume (S /S )
l 1 4 Calculated Value 1/smk
MONTICELLO NUCLEAR GENERATING PLANT PCP 2.0 l TITLE:
INSTALLED ATCOR SOLIDIFICATION R'evision 8*
SYSTEM Page 10 of 11 FIGURE 9.3 Samole Verification Form
, Sample No.:
Describe sample appearance, water amount, etc. See page 5 for sample verification l
prqblems.
j Initial Sample at completion of mixing:
Condition Sample at 1 hour:
Condition l - Sample at 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />s:
Condition l
l - Sample at 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />s:
I Condition
- Sample at 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s:
Condition NOTE:
IE solidification is not corr.plete after 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, THEN attach sheets to continue observations at 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> intervals (more frequently if required).
1/smk
MONTICELLO MUCLEAR GENERATING PLANT PCP 2.0 TITLE:
INSTALLED ATCOR SOLIDIFICATION Revision 8' SYSTEM Page 11 of 11 FIGURE 9.4 Samole To Container Worksheet A - Sample Activity Ci/ml 1
W - Dry Cement Feedrate
+*
1.0 CFM l
3 W - Volume of Waste Gal 2
W - Volume of Drum 7.0 ft3 3
W - Weight of Drum with Cap 50 lbs 4
i EXPECTED CEMENT / WASTE FLOWRATE W - Radwaste Mixer Output (W, x (S /S ))
CFM 5
4 2 T, - Time to Fill Container (W /W )
minutes 3
5 FEED RATE OF WASTE REQUIRED We - Conditioned Waste Feedrate
((7.48) x (Se x W ))
GPM l
5 SOLIDIFIED WASTE DATA V/ - Filled Container Weight 7
((W x S ) x 62.4) + W )
lbs l
3 S
4 A2 - Activity in Container (A x We x T, (3.78 x 10-3))
Ci l
3 Calculated Value
+* Should be 1 CFM ( 5%)
1/smk I
_ _ _ _ _ _.