ML20090C507
| ML20090C507 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 08/02/1991 |
| From: | NORTHERN STATES POWER CO. |
| To: | |
| Shared Package | |
| ML20090C496 | List: |
| References | |
| PROC-910802, NUDOCS 9203050066 | |
| Download: ML20090C507 (8) | |
Text
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A10NTICELLO NUCLEAR GENERATING PLANT 3144 (4 ACD 11.01)
Revision 2, 10/16/89 Page 1 of 1 PROCESS CONTROL PROGRAM REVISION
SUMMARY
SHEET Changes to the process control program are to be made in accordance with Technical Specification 6.5.D. The following form documents the revision process. (Attach additional pages as necessary). This form should be comp:eted by the person mrsk!ng the change.
1.
Description of the change "... sufficiently detailed information to totally support the rationale for change without benefit of additional or supplemental information".
Ovogth ob % \\ rs c_b e\\t beweb et # c d
7_ % - l euh omsserc_ R Ssb5 under PC P seMoa 4.Q __
l 2.
Determination that the change does not reduce the overall conformance of the solidified waste product to existing criteria for sclid waste, including review of Section 4.0 of the Process Control Plan. Da o n 3 m w dr <g e db r ogd W ce su % u c6 PCP Eh o,.f e.w s to psq Vm %A 4r y
Cr Aro mA A b> s\\_ sik.
r on 3.
Change reviewed and found acceptable by Operations Committee.
Date: 2 5 Liu RCll Meeting Number:
15'i l Comments:
W on e 4.
A copy of the information provided in items 1,2 and 3 above, and the revised Process Control Program shall be provided to Nuclear Support Services for submittal to the NRC with the Semi-annual Radioactive Effluent Release Report for the period in which the changes were made. (For changes made between January 1, and June 30, submit to NSS by July 31. For changes made between July 1 and December 31, submit by January 31.).Mhd'/ [
Date:
1 A c\\ n a cv y M 9 ~C Material Submitted:
List procedures that require revision due to (hanging the PCP.
5.
NUMBER TITLE DATE REVISED nom NOTE: Completed form to be forwarded to the Document Control Supervisor for filing.
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9203050066 920226 PDR ADOCK 0500o263
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i h10NTICELLO NUCLEAR GENERATING PLANT l
PCP 4.0 TITLE: !
DEWATERING OF RESIN AND OTHER FILTER
[ Revision 8
MEDIA Page 1 of 7 RROCESS CONTROLRROGRAM Prepared By:
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Reviewed By:
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Approved By:
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' Assoc Ref, B.7. 3 SR: N Frec: 2 yrs
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! ARMS #: 7052
!Do: Type: PCP 4 0 l Admn Initials:
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t.10NTICELLO NUCLEAR GENERATING PLANT l
PCP 4.0 TITLE:
DEWATERING OF RESIN AND OTHER FILTER l Revision 8
MEDIA I
Face 2 of 7 TABLE OF Col 4TEl4TS l
SECTIOt1 PAGE l
4.1 Purpose......
3 l
4.2 Applicability.
3 4.3 References........
3 4.4 Description of System.
3 4.5 System Operation.
4 4.6 ALARA..
4 4.7 Sampling.,
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t MCMTICELLO HUCLEAR GENERATING PLANT i
PCP 4.0 1
TITLE: }
DEWATERING OF RESIN AND OTHER Fil.TER
[ Revision 8
MEDIA Page 3 of 7 i
4.1 fXrRpfd f
To establish the process pefameters which will provide reasonable assurance that the ma'erial after dewatenug and Dackaging will moet or exceed the requirements of the burial sites,10 CFR Part 61 and all applicable state and federal shipping requirements.
2 4.2.A_p.phcabihtv l
This section of the PCP is applicable to the dewatenng of scent resins and other filtet mecia containing less than one percent oil by Voldme.
4.3 Beforencen CNSI C'rawing, C 340 E 500, "P&lD, RDS 1000" CNSI Topical Recort, RDS 25506 01 P "RDS 1000 Radioactive Waste Dewatering System,"
l CNSI Procedure, CA TP 009 " Hydrostatic Tost RequirementL CNSI Procedure FO OP 022, "Ecodex Pret s at/Powdex/Solka Floc /
j Diomaceous Earth Dewatenng Procedures" CNSI Procedure, FO OP 0. 4 " Set up and Operating Procedure for the RDS 1000 unit" CNSI Procedure, DM OP 022. " Process Control Program for the CNSI 3
Demineralization System" CNSI Dewatenng Topical, CNSI DW 1118 01 P CNSI Procedure, FO-OP 025, " Dewatering Procedure for CNSI 24 inch Diameter Pressure Vessels" 4.4 ReJeriotio,ttoljnlern The Rapid Dewatering System, RDS 1000 (Figures 4.1 and 4,2), developed l
l by Chem Nuclear Systems, Inc. (CNSI),is a self-contained system for accelerated dewatering 'of particulate waste materlat. The system prosides i
for simple operation and measurable end points. The RDS 1000 is compatible with steel liners and high integrity containers (HICs), which are 7
used to process waste slurry, and 24" pressure vessels filters, which are used to purify liquid streams,
- The system uses a positive dispiacement pump to remove all free standing -
liquid from the container. For liners and HICs, a closed loop, high velocity
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air flow and moisture separator are then employed to rapidly remove the remaining liquid. The extracted liquid is returned to the plant.
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- h10NTICiLLO NUCLEAR GENERATING PLANT l
PCP 4.0 TITLE: i DEWATERING OF RESIN AND OTHER FILTER
{ Revision s
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MEDIA Pace 4 of 7 4.5 Ey11em Opflats 4.5.1 Steel Lin or HIC Dewatering Slurry is pumped to a liner (or HlC) through an automatic waste inlet valvo. The remotely cnntrolled fill operation is viewed via a video monitor on the control panel. A remote level control system detects and monitors the waste levelin the liner, rninimizing operator exposure. There is also 1
an independent level control in the fill head. A high level signai from j
either level control will automatically close the waste inlet valve. The operator can also manually close the inlet valve if necessary.
A dewatering pump is activated to remove excess liquid during the waste transfer process ano to aid in compacting the media dunng the inPial gross dewatering.
After all waste has been transferred into the liner and yoss dewatering is complete, the b:ower is turned on and air is recirculated through the liner and moisture separator. The temperature of the materialin the line is monitorcd to ensure that thermallimits are not exceeded. A relief valve, which vents tnrough a HEPA filter to the plant offgas system,is prov!ded should the liner become pressurized. Air flow is maintained until the liner meets the specified acc6ptance criteria.
4.5.2 24 Inch Pressure Vessel Dewatering The 24 inch pressure vessels are constructed with inlet, outlet and vent ports. ' Dewatering is accomplished by connecting the RDS 1000 pump to the outlet port and performing a senes of 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> pumping and 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> i
standing cycles. The number of cycles is specified by CNSI according to the fliter media. During the final pumping cycle, the discharge of the pump is directed to a collection devica and the total liqu.d is nisasured with a graduated cylhder. Acceptance criteria, wh!ch ensure that free standing liquid criteria are met, are listed in CNSI procedure FO OP 025, according to the type of pressure vessel.
4.6 e.LARA l
The dewatering system was designed with ALARA as one of the major design criterion. The occupational exposure received from operation of this system will be minimized by the following features:
- a. Flushing provisions in the fillhead, plant stand moisture separator, and piping system.
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' tufCtJTICELLO tJUCLEAR GEllERATitJG PLAT /T l
PCP n.0 TITLE: i DEWATERING OF RESIN AND OTHER FILTEFI ! Revision 8
MEDIA I
Paae 5 of 7
- b. Remote location of the control panel
- c. Operation with liner in a sci < '
ask, as necessary.
- d. At,tomatic control of the was, irlet valve with redundant shutdown controls to prevent nvedilling the liner.
- e. Quick discunnect hose fittings and tillhead anchors.
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- f. HEPA filtration of all discharge t r.
- g. Stainless steel components designed for ecsy decontarnination with a minimum of crud traps.
4.7 EsLmphag For weste which is pumped to a liner in sturry forrn, representative samples are collected from a sample point on the waste transfer line. Qua'itative and C,Uantitative data are developed through gamma analysis of the sample, correlation factors for non-gan'ma emitting isotopes and knowledge of the total volume of wasto.
For 24 inch pressure vessels, cualitative data are developed through gamma analysis of the liquid waste stream in which the filter was used. Dose rates on the exterior of the pressure vessel are used to quantify the activity of gamma emitters and cc *.lation factors are then used to calculate the total activity.
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PCP a.0 TITLE: i DEWATERING OF RESIN AND OTHER FILTER Revision 8
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MEDIA Paae c of 7 Figure 4.1 RDS 1000 Process Flow Diagram 1 -
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A10tlTICELLO NUCLEAR GENc' RATING PLANT l
PCP 4.0 TITLE: l DEWATERING OF RESIN AND OTHER FILTER nevision 8
l MEDIA Page 7 of 7 i
Figure 4.2 Typical Precoat Dewatering Liner Internals For HICS or Steel Liners
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