ML20212A880
| ML20212A880 | |
| Person / Time | |
|---|---|
| Site: | 07000036 |
| Issue date: | 10/22/1997 |
| From: | Sharkey R ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY, ASEA BROWN BOVERI, INC. |
| To: | Weber M NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 9710270063 | |
| Download: ML20212A880 (6) | |
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Oct-UC-07 Oca43P ADD CCNO 334 c37"7001 P.01 I
' ABB TELEFAX
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REFERENCE TO:
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If!!!,l!I,l!llll!llflL11111 jlA"I88MUs8883 PDR ABB Combustbn Engineaing Nuchar Operations, Funi Operations 3300 State Road P, PO Box 107 Hematite, MO 63047 Telephone: (314) 037 4001 Extension:
319 e x; (33e3837 7003 i
(314) 296 5640
Oc.t-2r-C7 CEaC3P AD3 CCND 314 C37-7001 P.OE ABB Octobe'r 22.1997 Docket No 70 36 1.icenie No. SNM 33 Mr. Michael Weber, Chicf Licensing Hrnnch Division of Fuel Cycle Safety and Safeguards Office of huclear Materials Safety and Safeguards U.S. Nuclest Regulatory Commission Washington, DC 20$$$.0001 Sub.iect: Decommissioning of Former Evaporation Ponds References.
(A) CE (R. Sharkey) letter to NRC (R. P:erson), dated October 26,1994 (B) CE (M. MichcInen) letter to NRC (R. Pierson), dated March 10,1995 (C) NRC (R. Pierson) 1.icense SNM.33 Amendment 4 to CR (R. Sharke)), dated May 4,1995 (D) G (R. Rhark ry) letter in NRC (R Pierson) rinteri May 10.1997
Dear Mr. Weber:
't his is to provide revi>sd pages 2,3,12 and 13 to Enclowtv i to the May 30, IW7 letter (Ret. D),
which provided an updated Decommissioning Plan for the two former Rsaponstion Ponds, in accordance with the Decommissioning Plan submitted by Combustion Engineeri10 (CE)(Ref.
A as amended Ref. (B)) and approved by the NRC [Ref. (C)), CE has completed prvremediation characterintion and has updated the decommluloning plan The characterization indicated that remediation beyond trist limited to hat spots is required. Therefore, the solubility study was postponed because the remosal of a significant podion of suiface material will hnli,wt the arsults of a solubility study in a non conservative manner.
As part of the update a new schedule has been propo. sed due to discovery of additional contamination requiring remed!ation. The schedule originally proposed was developed ur der the assumption that little remediation would be r.ecessary. The additional contamination hus no ufsty por ensironmental impact, if thete are quc>tions regarding thi> matter, ple4w feel free to conta:t Dr. Earl Saito of my stafTat (314) 937 4691 I?xt. 461 m mpelf at (314)937 4691 E3t. 399 Cordially, COMBUSTION ENGINEERING, INC.
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h Robert W. 3huke)
Director. Regulatory Affairs cc: Patrick Hiland Region 111 ABB CENO Fuel Operations
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oct-oc-c7 cracar Anu ccNo 324 C37-7002 p,oa Encksure 1 to RA97/ss)(rnised 10/21/97)
T.vaporsl60m Pones Decomminioning Plan Update Depending on urenlum concentration, water pumped from the pond will be discharged to the site creek or evaporated. The limit on the concentration of uranium discharged will be 3 x 10 pCl/ml as rneasured at the confluence of the site creek and Joachim Creek (site boundary). Measurements taken at closer locations may also be used to demonstrate compilance with this limit when discharging to the site creek.
2.1.3 Safety Evaluation The activities and tasks of this limited scopo decommissioning project of the former evaporation ponds are simple and not hazardous to the workers, environment or publ:c. There have been no operational occurronoes that ocuid adverooty affect decommissioning safety. The current assessment of residual radioactive contamination of the ponds is such the workers will not be exposed to significant radioactivity or radiation from the project Other than common industrial safety concerns, there la no foreseen potential for accidents that could have a significant impact on decommissioning safety. The decommissioning project can therefore be conducted in a safe manner.
2,1.4 Procedures As stated in Section 3.3, decommissioning activities and tasks will be performed in accordance with approved wntten procedures. The control system concerning procedures is described in Section 2.0 of SNM-33.
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o s t.a t t - 0 7 Ot:4CP ADO CCNO 314 03'F - 7 DO S P.04 Entloosts I to ras 7/883 (m need is/21/97) i' Respret6en Pende Decommlesion6*6 Na U del' P
'4.0 Pl'anned Final Radiation Survey j
Upon completion of the decontamination activities described in this plan, areas within the scope of the project will be surveyed to determine if they j
meet the nhjectiven as specified in Sedion 2.1.1.
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4.1 Final Status Survey instrumentation l
Due to the short range of alpha and beta particles, which comprise the majority of radiation emitted by low enriched uranium, scanning for uranium contamination has limited value. However, the area will be scanned using Geiger Mueller, Scintillation and/or gas proportional detectors. Instructions regarding Instrument selection, I
calibration, use, and control will be included in final status survey l
procedures.
4.2 Methodology for Ensuring Adequate Survey Coverage The Final Status Survey will be designed to ensure that data generated are statistically meaningful. The methodology will follow the guidelines set out in NUREG/CR 5849.
4.3 Analysis of Soll Samples Soll samples will be analyzed for uranium by any (or combination) of the following methodologies.
4.3.1 Kinetic Phosphorescence Analysis 4.3.2 Gross Alpha Analysis 4,3.3 Gamma Spectroscopy 4.3.4 Alpha Spectroscopy 5
Oct-EE-07 OE44cP ADO CCNO 334 037-7001 f*. 00 F.eduourt i eo RA9WSs3 (mimi 1WnM7) bepoestloa Foods Deconsnissiostag Plan Update 8.0 Remedletlen Plan The secondary pond will be the first to be remediated and surveyed.
After the secondary pond is completed, the prirnary pond will be remediated and surveyed.
8.1 Secondary Pond To dry the necondary pond, water from the secondary pond will be pumped to the site creek, the primary pond or evaporated. Th9 barm will be removed, and to the extent prooticable the scrubber l
rock will be separated. The scrubber rock will be disposed as low level waste and the soll will be sampled. if the soil is above 200 pC1/g it will be disposed of es low level radioactive wante. Soil under 200 pCL/g will be retumed to the berm area. A ' walk over*
survey wlil be peermed to identify areas of inuwesed bets / gamma activity. These areas will be evaluated to determine if remediation is needed. Arc,as found to have contamination above 250 pCilg will be romediated.
Once all remediation activttles are complete, a triangular grid as specified in Section 4.3 will be set up and semples collected. The results will be compared to the remediation levels specifed in Section 2.1. If additional remediation is necessary it will be performed. When the remediation levels have been ::chieved, the pond will be back filled.
8.2 Primary Pond To dry the primary pond, water from the primary pond will be pumped to the site crook or evaporated. The berm will be removed and to the extent practicable the scrubber ror:k will be separated.
The scrubber rock will be disposed of as low level waste and the soll will be sampled, if the soil is Wovw 200 pCl/g it will be disposed of as low level radioactive waste. Soil under 200 pCllg will be retumed to the berm area The pipe which fed the pond will be removed back to the pond fence and copped. Sollin the near vicinity of the pipe will be remediated to a level of 100 pCl/g A
" Walk over" survey wlil be performed to identify uivun of incieased beta / gamma activity. These areas will be evaluated to determine if remediation is needed. Areas found to have contamination above the 260 pCL/g will be remediated.
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__._m oat-ED-07 Ces4CF ADu cerdo 334 037-7001 P.OO Emlowre I to RA91/ss3 (rev6 sed 10/2147)
Etsporation Pende Dwomsninioning Plan Update Once all remediation activities are complete, a triangular grid as specified in Scotion 4.3 will bo set up and samples collected. The results will be compared to the remediation levels specified in Section 2.1. If adddional remediation is necessary it will be performed. When the remediation levels have been achieved, the pond will be back filled.
8.3 Areas Outside of the pond and Inside the pond fence A 'wsik over' survey will be performed in idenlify arnan of inntenand beta / gamma activity. These areas will be evaluated to determine if remedlailon is needed. A ytid as specified in section 4.3 will be set up and samples collected. The results will be compared to the remediation levels specified in Section 2.1. If additional remediation is necessary it will be performed. When the remediation levels have been achieved, the area will be covered such that any area with average uranium levels above 30 pCl/g is covered by at least 4 feet of fill.
8.4 Final survey Report A final survey report will be prepared in accordance with Section 4.0 and submitted to the NRC, The NRC will have the opportunity to conduct a confirmatory survey of the ponds prior to the backfilling mentioned above.
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