ML20150C117

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Rev 1 to Dresden Nuclear Power Station Process Control Program
ML20150C117
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 02/29/1988
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20150B332 List:
References
PROC-880229, NUDOCS 8803180021
Download: ML20150C117 (6)


Text

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DRESOEM NUCLEAR POWER STATION PROCESS CONTROL PROGRAM Revision 1 FEBRUARY, 1988 0

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e INDEX A. Purpose B'. References C. Vendor Process System (s)

D. Liquid Waste Processing System (Stock System)

E. Dry Active Waste (DAW)

F. Secondary Wa'ste Streams s

C. Inspection H. Shipment i

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s i 1 Dresden Nuclear Power Station Process Control Program A. Pu rpose.

The purpose of the Dresden Nuclear Power Station (DWPS) Process Control Program is to establish the process parameters which will provide a reasonable assurance that all low-level radioactive waste (LLRW) processed at Dresden Station will meet or exceed any and all acceptance criteria for processing, packaging, and shipment of LLRW to licensed burial facilities.

This criteria includes all Department of Transportation (DOT),

Nuclear Regulatory Cor. mission (NRC), State, and licensed burial f acilities rules and regulations for the processing, packaging, and shippir$ of LLRW.

Although a Stock Equipment Company cement solidification systea was installed during 1919 DNPS currently uses commercial, vender supplied, processing systems for the processing of the primary liquid

LLRW streams generated by the Station.

Com.monwealth Edison requires that all vendors used to procers liquid LLRW at DNPS must meet all applicable Commonwealth Edison Co quality standards and shall have submitted a Process System Topleal Report to the NRC. Fu rthe rmo re , the vendor solidlfication/ stabilization media must be approved by the licensed burial sites.

B. References.

1.

The following references were used as guidelines in preparing the Dresden Station Process Conten1 Program,

a. Dresden Tcebnical Specifications.

(1) 3.8.F. and 4.8.F., Solid Radioactive Waste.

(2) 6.9., Process Control Program

b. Dresden Procedures.

(1) DOP 2000 Series, Radwaste operating Procedores.

(2) Special Procedures (as needed).

c. Commonwealth Edison Program for Implementation of 10 CFR Part 61 and 10 CFR Part 20.311 Dated December 22, 1983. {

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d. Commonwealth Edison Quality Assurance Manual. l t
e. 10 CFR Part 20.311 Transfer for Disposal and Manifests. I

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10 CFR Part 61 Licensing Requirements for the Land Disposal of Radioactive Waste.

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g. I NRC Branch Technical Position on Waste Form.

h.

Stock Equipment company Process Control Program for BWRs.

2.

The following referencer. are utilized in this PCP for information only.

a.

EUREG 0133 Preparation of Radiological Effluent Technical Specifications for Nuclear Fower Plants - October 1978.

b. Dresden Final Safety Analysis Report. '

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Section on Solid Waste Management System.

,r C. Vendor Process System (s).

DNPS currently uses commercial, vendor supplied, processing systems for the the processing of the primary liquid LLRW streams generated by Station.

/i Commonwealth Edison requires that all vendors used to process lig>id LLRW at DNPS must meet all applicable Cc7monwealt] Edison Co. quality '

standards the NRC. and shall have submitted a Proiyas System Topical Report to Furthermore, the vendor solidi'4catich/ stabilization media must be approved by the licensed burial rites. '

D.

Liquid Waste Processing System (Stock Sys: tem).

The Stock Equipment Solidification Jystem method of solidification involves putting a specified amount of solidifying agent (Portland or masonry cement) f into a modified type 11-C drum. A mixing weight is I added to the drun and it is transferred to the drum filling station At the filling station the drum is opened, a prescribed charce of waste is added to the drum and it is capped and tumbled. This operation is repeated a second time to complete the waste drum fill.

The Stock Solidification System is operated in accordance with ,-

procedures developed by Stock.

The formulas used to fill waste and cement into a drum are those developed in the Stock Process Control Program. Tumbling timeI are es recommended by Stock.

1. Spent resins.

Spentholding resin resins are pumped f rom the'r service units to a spynt; tank.

sampled. Thecontents'ofthistankareperloolcal;h,

Spent resins are slu',lced to a decanting tank where ,

they are allowed to sett:a, und the appropriate amount of water is adjusted. Drume are fille 4 by pumping from this tank f directly to drums.

A completU description of the transfad. '

decanting and drum filling operation can be found in DOP 2000-33, 35 and 36.

mixture is used in the drumming process.The Mixing Stock parameters PCP4th formula i for waste as recommended by Stock. ' '

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. 2. Concentrated Licuids.

Concentrated wastes are pumped from the concentrator / evaporators through a holding tank to a concentrated waste tank. Samples of 7 each batch of evaporator bottoms are sampled every time the

concentrator is dumped. The prescribed amount of waste and concretc~ in a drum are determined from Stock pCP formulas.

1' Drums are filled according to procedures using the appropriate fo rmula t ion. The first drum from every batch is opened and ch ' examined for uniformity of mixing, solidification and presence ,

of f ece standing water. A complete description of the transfer, decanting, and drum filling operation can be found in DOP 2000-34, 35, 36 and 43.

3. Filter sludges.

Filter sludges are collected in a holding tank. When sludge is to be processed, it is pumped from the holding tank to a decanting tank where the amount of water is adjusted. Drums are filled by pumping from this tank directly to drums. Samples of sludge are taken for analysis either directly from a drum or during the transfer to decant tank. A complete description of the transfer, decanting and drum filling operation can be found in Dop 2000-32, 35 And 36. Stock system formulas are used to determine waste / concrete ratios and mixing times.

4. L Stock drums are capped prior to the second tumbling and ramain capped. Experience has demonstrated that no problems have developed due to the exothermic reaction during processing in this system. '

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((, + E. Dry Active Waste (DAW). *

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DAW is collected throughout the plant in various containers.

potentially clean items are surveyed and released. DAW items are 1 sorted for compactibio and non-compactible wastes. Non-compactible  ;

items are further sorted into items that can be decor.taminated and items that cannot be decontaminated. Compactible wastes are precompacted into metal drums using the Station's commercial i

compactor and then shipped to a comme.'clal volume reduction facility

' for super-ccmpaction services. Commercial vendor decontamination services and facilities may be used for decontamination of bulk items. Non-compactible, non-recoverable items are volume r:fuced to the extent practical and placed into strong, tight container. and shipped to burial. Dresden personnel handle all collecting, Processing and shipping of DAW. .

I F. Secondary Waste Streams.

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periodically, wastes are generated fecm such sources as decontaminations, tank cleaning, sump cleaning and waste oil. Wastes

^ generated in this manner are sampled on a batch basis. Appropriate  !

formulas for ratioing solidification agent to waste are developed or.  !

' ' small bench samples, or if the consistency of the waste is known.

from establis'hed formulas.

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Dresden Station ships large volumes of contaminated oil by utilizing the on-site vendor processing system and vendor oil solidification process Control program. Smal*. quantitles of oily wastos may be prepared for shipment to U.t. Ecology at Richland, WA., by absorbing the waste in an approved absorbent media in accordance with the U.S.

Ecology Burial license.

O. Inspection.

All shipping containers (drums and boxes) are inspected for compliance with DOT and burial site requirements prior to use, periodically, the Quality Assurance Department destructively examines filled containers. A random sample of each waste stream is chosen by the Quality Assurance Department. Drums are inspected for free standing water, quality of solidification and mixture. Samples are '

taken at least once in every ten batches. A batch is defined es:

Evaporator Bottoms Every concentrator dump is considered a batch.

Resins Every time Rad-Chem samples resin holding tank.

Sludge Annually.

If f ree standing water is observed, additional samples of the t particular series of batches are taken to establish a statistical '

base. Additional samples will be taken as warranted by this base.

process parameters in use during the production of these drums will be lavestigated and corrective actions taken as warranted.

Drums found to contain free standing liquid will be decanted, then r packaged in overpack drums and surrounded with approved absorbent prior to shipment. ,

l H. Shipment. '

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All wastes shipped off site are packaged in DOT approved shipping i containers. All transport vehicles must meet the appropriate DOT and tTRC requirements prior to loading. Packages are inspected and shipments (vehicles) are inspected for compilance with DOT, NRC and f burial site criterion prior to leaving the site.

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