ML20215C430
| ML20215C430 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 06/09/1987 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 2NRC-7-158, PROC-870609, TAC-62923, NUDOCS 8706180115 | |
| Download: ML20215C430 (15) | |
Text
{{#Wiki_filter:3. f; . s, B.V.P'.S. - 0.M. 2'.18.1 DUQUESNE' LIGHT COMPANY' BEAVER VALLEY-POWER STATION OPERATING MANUAL 1 CHAPTER 18 PROCESS CONTROL PROGRAM UNIT 2 QA CATEGORY II t< 1 d 1 8706180115 870609 i-58 ISSUE 1 REV 1 PDR ADOCK 05000412 ( PDR
'O.- B V.P.S. - 0.M. 2.18.1-CHAPTER 18 PROCESS CONTROL. PROGRAM TABLE OF CONTENTS P_ age I. -PURPOSE 60 II. SOLID WASTE DISPOSAL SYSTEM DESCRIPTION A. Function 60 B. Summary of System Operations 61' III. OPERATIONS. PERFORMED TO VERIFY SOLIDIFICATION OF RESIN WASTES [ .A. Component Control 65 B. Operator Follow 65.- C. Final Inspection-65 IV. ' DISPOSAL OF-SOLID OBJECTS IN CONCRETE FILLED LINERS 66' V. ' CRITICAL ITEMS' LIST 66 VI. LIMITATIONS AND SURVEILLANCE REQUIREMENT -l l A. . Limitations 67 'B. Surveillance Requirements 67 VII. REFERENCES A.
- 110CFR61, Licensing Requirements for Land Disposal of Radioactive Waste B.
STOCK TOPICAL REPORT SRS-002-P, Rev. 0,; Stock Equipment Company Waste Solidification Process for Low-level Radioactive Wastes - Generic Waste Form Certification Results, i l 1 59 ISSUE 1 REV 1
B.V.P.S. - 0.M. 2.18.1 { ) i PROCESS CONTROL PROGRAM (Continued) { 1 I. PURPOSE ij A. To provide appropriate radwaste mixture formulae to achieve waste ] forms that satisfy the applicable (i.e. Stable or Unstable) i performance criteria. B. To provide transfer of resins from system Ion Exchangers and Demineralizers to the Unit 2 Resin Hold Tank (2WSS-TK22), the j i Unit 1 Resin Hold Tank (SW-TK-2) or directly to High Integrity l Containers (H.I.C.s) as necessary or appropriate. j l l C. To provide the results of tests performed to determine the waste, ) cement, and additive formulae required for the solidification of the radioactive wastes generated at Beaver Valley. These wastes i I include evaporator bottoms, boric acid wastes and bead resins at j f units 1 and 2 and powdered resin wastes, in some cases, at unit 2. l [ The formulae derived, tested and reported herein form the basis i for process parameters indicated in this Chapter 18 (Solid Waste Disposal System) of the Unit 2 Operating Manual and apply to all l waste processed at Unit 2 regardless of origin. l \\ l i l D. .To indicate the requiremente for disposal of radioactive filter l cartridges, rags and other solid objects in the matrix of l solidified concrete. j E. To indicate critical set points and limitations for operation of the radwaste solidification system. l l { F. To indicate surveillance requirements for solidified, and other processed wastes shipped offsite. II. SOLID WASTE DISPOSAL SYSTEM DESCRIPTION (Designator 2WSS) A. Function The Solid Waste Disposal System at Unit 2 consists of several j. systems with inputs to solid waste processing equipment or functions providing specific actions for handling,
- holdup, pcckaging,
- transfer, storage, and ultimately disposal of radioactive wastes.
Liquid wastes are processed to a solid form i using a STOCK EQUIPMENT COMPANY waste solidification system provided and installed for this purpose. A remote monitoring station for drums is provided adjacent to the storage area for monitoring radiation and contamination level on drums and for applying appropriate markings or labels. The ability to remotely survey drums prior to shipping helps prevent the release of activity to the environment. 60 ISSUE 1 REV 1
F V.P.S. - 0.M. 2.18.1 PROCESS CONTROL PROGRAM (Continued) B. Summary of System Operations The vaste solidification system consists of a cement storage silo and cement feeder, spent resin booster pump, resin waste hold
- tank, evaporator bottoms hold tank, decant tank and agitator, spent resin dewatering pump, resin waste decant tank metering
- pump, evaporator bottoms hold tank metering pump, caustic buffering tank and pump, drumming station and drum processing enclosure, necessary piping, valves, instrumentation, electronics, and other hardware for the system to function. This equipment may be used for the solidification of resins, evaporator bottoms, or combinations of resins and evaporator bottoms.
Solid wastes such as filter cartridges, polyethylene bags containing contaminated rags or other debris, or similar items will be processed at Unit i under the specific conditions set down in the Unit 1 Process Control Program. Vastes are solidified in 55 gallon, closed head steel drums which are fabricated with a 4 inch diameter screw-in bung opening. The drum is set in place under the cement feeder and the appropriate weight of cement is added. The weight is verified by the cement feed station scale readout and is recorded. Additives which may be required as a solidification aid are added at this stage also. Sodium metasilicate is an example of the additives that may be required. The drum is then conveyed by way of rollers to the crane pickup point. Here, remotely operated overhead bridge crane with drum handling attachments latches onto the drum and transfers it to the drum process enclosure. At drum process enclosure the cement and additive loaded drum is transferred to the tumbling mechanism which is located inside a stainless steel enclosure. Here the drum is positioned, uncapped, Zil.ed, capped, agitated, and, if necessary, deconned. Once the drum is properly located in the drum processing enclosure, the proper amount of resin / water slurry or evaporator bottoms can be metered in for mixing. Resins which are to be solidified are first sluiced to the resin hold tank where the pH can be adjusted, if necessary, using caustic from the caustic buffering tank and dewatered if desired. The resultant slurry is sent to the decant tank where the resin is allowed to settle. The decant pump through the use of a multi-position swing arm dewaters the mixture to the required percent of free standing water. The desired volume is then pumped from the decant tank to the drum process enclosure by the positive displacement metering pump and injected into the drum. Evaporator bottoms which are to be solidified are first held in the Evaporator Bottoms Hold Tank where they are adjusted for pH, if necessary, using caustic from the caustic buffering tank, and 65 ISSUE 1 REV 1
A 9.V.P.S. - 0.M. 2.18.1 PROCESS CONTROL PROGRAM (Continued) are recirculated to provide a uniformly conditioned concentrate. The E.B. Metering Pump is then started, taking a suction on the recirculating Evaporator Bottoms, discharging to the drum process enclosure where it is injected into the drum. Filling of drum from either source can be accomplished as a single fill or double fill ope.ation. Double fill operations are required when containers are desired to be at least 85% full. The amount of total liquid injected into the container will be dependent on the outcome of analysis done prior to solidification. (See OM 2.18.4). The drum containing the cement, additive (s) if applicable, and the injected liquid component are then mixed by end over end tumbling within the drum process enclosure. Finished drums are removed by the overhead bridge crane and set in storage for curing and inspection. Storage is provided in the adjacent; indexed storage area. This storage area is north of the drum process enclosure cubicle and is separated by a high shield wall and shielded walkway. Wastes are also processed for disposal without use of the solidification system. By proper system alignmenc, resins and bottoms ccn be transferred to Unit I for processing under the Process Control Program of that unit. Resins may also be sluiced to High Integrity Containers (H.I.C.s) which can be located in the Truck. Bay or storage area. After the resins are transferred into a H.I.C., there are appropriate pumps, valves and piping to de-water the H.1,C. to the resin hold tank. A sampling s/ stem is provided which consists of appropriate valves and sample points. Samples obtained for analysis will be from tanks that are mixed or recirculated to the desired degree to provide a representative sample. Mixing or recirculating will be per the operations manual. Before the solidification process begins, a bottoms sample will be obtained to determine the pH, boric acid content, and total solids, if necessary, for the unconditioned waste. For resins, the amount of free standing water in the Decant Tank must be assayed prior to transfer to the I drum process enclosure. Samples obtained for radionuclide determination will be at a frequency determined by RADCON supervision. All samples will be obtained, stored, analyzed, and shipped if required, with strict adherence to ALARA principles. The procedures necessary to transfer, condition, and solidify radioactive wastes, package and dewater radioactive waste, to procure and properly hendle casks and High Integrity Containers (HICs) shall be located in Chapter 2.18 Section 4 and Chapter 1.18 Section 4 of the Unit 2 and Unit 1 operations manuals and in the appropriate vendor's procedures. Use of vendor procedures will be f 62 ISSUE 1 REV 1
+ V, c. 3./.P.O. - 0.M. 2.18.1 PROCESS' CONTROL' PROGRAM (Continued) with Onsite Safety Committee approval and direct Duquesne. Light-Company supervisory direction. It will be the responsibility.of
- the. Site Radioactive Waste Coordinator to maintain the proper Certificates of Compliance and ' procedures for 'High Integrity Containers and Casks.
j I'. L-63 ISSUE 1 REY 1
I',7.P O h, 2.18.1 PROCE3S CONTROL PROGRAM (Continued) i ' SLOOGE DECANT CAUSTIC EWPORATOR TANK TANK BOTTOMS 2CND-TK26 2WSS-TK23 WSS-TK24 HOLD TANK TK-25 X. l HOLO 1P 1 r i f-TANK ks UP($ 2S P-26 WN P-23 W P-24 p, BOTTOM h METERING CAUSTIC PUMP h PUMP BUFFERING h a PUMP 1r SPENT. RESIN l l 4 HOLDING TANK 2WSS -T K-MMTO \\**/ ad/Os n l>< P-25 N EVAPORATOR J U L. 0N[$b 55 GAL i l muu BEAVER VALLEY "2 WASTE SOLIDIFICATION SYSTEM l 64 ISSG 1 REV 1 )
s 0.V.P.L. - 0.M. 2.18.1 PROCESS CONTROL PROGRAM (Continued) III. OPERATIONS PERFORMED TO VERIFY SOLIDIFICATION OF WASTI A. Component Control Three separate components combine to make up the cement mixture formed at the drum process enclosure. These are: 1. The Cement Component. The hmount (weight) of cement added to the drum is dependent on,the Itquid being solidified (ie. Evaporator Bottoms. Sosin Slurry, powdered resin), the stability desired (ie. Class A - No free standing water or Class B,C - stability required), and the characteristics of the waste (ie. frau standing water, total solids, pH, boric acid content).. 2. The. Additive Component. Additives such as sodium metanilicate are added in varying amounts depending on the type of waste being processed. The same factors that determine the amount of cemen:'used determine the amount of additive used. 3. The Liquid (Waste) Compenent. The amount of liquid (waste) metered into a drum will be dependent on the stability desired and on the factors mentioned above for cement and additive use. For liquids, a crucial factor is whether the liquid is being added as the first or second fill stage. >j B. Operator Follow Since cement and additives are added in pre-determined weights, an electronic scale is provided at the drum station to measure and verify that the proper amount is being added. The applicable procedure worksheets will contain space to enter empty drum weights, drum weights after cement addition, and drum weights I after additive addition. Verification of these entered values. 'e will be shown by the operator's initials after these entries. The volume of liquid added to the cement and additive filled drum is actuated remotely from the Solid V a ste Panel. The appropriate volume will be selected and injected it.to the drum. This volume will be recorded on the appi. cable procedure worksheets. Verification will be shown by the operator's initials after the entry. C. Final Inspection As a final check, solidified drums will be inspected, prior to shipment, for the presence of free liquids. Inspection will be visually accomplished by removing the bang and observing the contents of the drum or by the use of probes utilizing light, sound or other methods to verity compliance with applicable 65 ISSUE 1 REV 1 1
I e l 7.V.F.S. - 0.M. 2.18.1 i PROCESS CONTROL PROGRAM (Continued) l J?A;Pt -e regulations. If free water is found to exist, appropriate actions i n ,will be taken to either solidify the liquid or segregate the drum ? to preclude it from being shipped for burial. IV. DISPOSAL OF' SOLID OBJECTS IN CONCRETI FILLED LINERS Solid wastes such as filter cartridges and contaminated rags or other radioactive debris will, on occasion, and after appropriate analysis, be placed in HIC liners or open-neck metal baskets and immobilized in-concrete and waste mixtures-inside steel liners. The baskets are suspended off the bottom so that the concrete mixture will surround the basket and its contents. Such liners must be identified to.RADCON so proper sampling and analysis may be performed. This disposal method is performed at Unit 1 only and falls under the. jurisdiction of that Unit's Process Control Program. Unit 2 objects such as filters, rags and other articles described above'will be transferred to Unit 1 at the I direction. of the Site Radwaste Coordinator. Such transfers will be e acccmplished with strict adherence to ALARA principles. V. CRITICAL ITEMS LIST The following list indicates-set points and items in the operating procedures-(Chapter 18, Solid Waste Disposal System). Close operator Sollow is required in these areas to assure proper operation of the system and to verify-solidification of resin or evaporator bottom wastes and other Radioactive Waste Disposal method. 1. The amount of cement, additives, and liquid added to a drum for solidification will be determined prior to beginning the solidification process. The amounts required are indicated.in the operations procedures for all solidification operations that-will be performed. The exact amounts indicated, plus'or minus any applicable acceptable error, must be-added to achieve an acceptable waste form. 2. The correct free standing water percentage must be obtained or i verified prior to injecting resin wastes into drums. j e n q 3. The proper pH must be obtained or verified prior to the injection j of bottoms or resin wastes into drums. 4 Boric acid concentrations in evaporator bottoms shall be less than 40L by weight. 5. Samples which will be used to characterize the radionuclide content of the wastes shall be obtained at a frequency determined by Radcon supervision. 6. Contaminated oils or items containing contaminated oils will be processed by an approved method. 66 ISSUE 1 REV 1
' l.{' B.V.P.S. - 0.M. 2.18.1' PROCESS C0ffrROL PROGRAM (qontinued) 7. ' Dewatering of High Integrity Containers will be by approved procedures. 1 ~8.. Handling of HICs and Casks will be accomplished by approved procedures. VI. LIMITATIONS AND SURVEILLANCE REQUIREMENTS A. LIMITATIONS 1. Solid wastes such as filter cartridges, rags, and the like will be transferred to Unit 1, if required, under the direction of the Site Radwaste Coordinator. Such materials will be contained in open mesh baskets which will be placed in the approximate center of the liner then immobilized with a concrete matrix. The basket will be suspended off the bottom in such a way that the concrote matrix will surround it. Filters may also' be disposed of in High Integrity Containers.' 2. All wastes regardless of required stability will-be prepared in such a manner as to preclude the presence of free standing -water. Solidified wastes will be inspected either visually or,by the use of instruments designed for that. pu.rpos e. Solidified wastes shall be given adequate time to cure and cool prior to their inspection. l 3. High Integrity Containers (HICs) will be handled and dewatered in accordance with station approved procedures and j will be suitably prepared for disposal per vendor and -{ disposal site criteria. ) i B. SURVEILLANCE REQUIREMENTS 1. The Effluent and Waste Disposal Semi-annual Report shall include the following information for each type of solid waste shipped off-site during the report period: a. Container volume b. Total Curie quantity (determined by measurement or j estimate) l c. Principa) radionuclides- (determined by measurement or estimate) d. Type of waste (e.g., dewatered resins, dewatered filter media, solidified evaporator bottoms, compacted trash) 67 ISSUE 1 REV 1 l
9 R V.P 0. - n.M. 2.18.1 PROCESS COffrROL PROGRAM (Continued)' 's. Type of container y c, .f. Solidification agent 2. -The metering pumps for the evaporator bottoms hold tank 1 (2WSS-P25) and resin decant tank (2WSS-P23) will be annually J checked-for proper waste volume discharge per chapter 2.55A.4 OST 2.18.2. 3. Functional tests will be performed for waste stability every 10th batch or annually, whichever comes first, Such test. will be per Chapter 2.55A.4 OST 2.18.1. l l I i 1 I i l I t 68 ISSUE 1 REV 1
i y*w?ty;Ww-l cq'* x 5 B.V.P.S. - 0.M. 2.18.1 rm_-- _L PROGRAM (Continued) l a..C.@$"M6 u 'cicd t System Parameters Pertinent to the ,ZQ[. a mw+{',jf.'iProcess Control Program j 4 gj. ny Drum Capacity l Approximately 7.4 ft (internal) 8 Drum Dimension 23 inches diameter x 34' inches high Drum Weight (fully loaded). Approximately 750 lbs. . Shipping container. types Hard or-" Rag" top Vans, for drums. vendor supplied shield casks if necessary. Solidification material Type II cement and additives (Specification provided by STOCK) Solid wastes immobilized in Not Applicable. Such material
- drums, is transferred to and processed at Unit I.
Waste to Cement ratio by weight, Evaporator Bottoms (40% by WT, Class A 12% 40% ~ Boric Acid) Class B,C 0.423 .433 Waste to cement / additive ratio Class A Unstable by weight resins. Steam / Water Resin Only 10% fsw 0.585 0.530 1 15% fsw 0.568 0.501 ) 20% fsw 0.551 0.472 j Class B,C Stable { Resin / Water Resin only Anion Resin 0.514 0.458 Cation Resin 0.524 0.530 Mixed Bead 0.402 0.208 Resin Powdex: 10% fsw 0.567 0.541 15% fsw 0.516 0.475 20% fsw 0.475 0.420 1 Maximum boric acid concentration 40% concentration (by sampling for evaporator bottoms before solidification) Detection of free water Visual inspection or inspection with appropriate instrumentation prior to sealing 69 ISSUE 1 REV 1
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- lW
^ '0* I i-2.V.P.O. - 0 M. 2.18.1 PROCESS C00f11t0L PROGRAM (Continued) 54f!w.. Dewatersagl Resins'. Free standing water requirements . sgi;&y will be verified by measuring
- Th*k?.
41 water obtained on the last 'I ? pumping Curie content in liner Determined by analysis of the waste, estimation based on gamma survey performed after processing, gamma spectroscopic analysis of waste and the use of plant -specific scaling factors, or a combination of these and ' other industry standard methods. Ident.fication of principle Estimation of principle radionuclides radionuclide will be accomplished by inhouse. gamma spectroscopy, vendor analysis, plant specific scaling factors or a combination of these and other industry standard methods. 4 70 ISSUE 1 REV 1 l I
E.3 ' y 2NRC-7-158 Vall
- o. 2 Unit Project Organization -
- Telecopy
) Ext.160 N$ NPA 15077 United States Nuclear Regulatory Commission ATTN: -Document-Control Desk- _ Washington, OC 20555.-
SUBJECT:
Beaver Valley Power Station Unit No. 2 -Docket No. 50-412 .SER Confirmatory Item #40-Solid Waste Process Control Program Gentlemen: Please find attached the BVPS-2 Solid Waste Process Control Program (PCP). Note that :the PCP will be contained as Chapter 18 of the BVPS-2 Operations Manual. If you should have any questions, please call Mr. A. N. Dicesaro at (412) 393-7742. DUQUESNE LIGHT. COMPANY '1 ) By / vJ. J< Carey ~ Senior Vice President I AND/ijr NR/AND/SLD/WST l i Attachment AR/NAR cc: Mr. P. Tem, Project Manager Mr. J..Beall, NRC Sr. Resident Inspector i J .Mr..L. Prividy, NRC Resident Inspector INP0 Records Center 1 qL. ( i}}