ML20135B429
| ML20135B429 | |
| Person / Time | |
|---|---|
| Site: | 07003085 |
| Issue date: | 11/14/1996 |
| From: | Taylor J NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| To: | Diaz N, Dicus G, Shirley Ann Jackson, Mcgaffigan E, Rogers K, The Chairman NRC COMMISSION (OCM) |
| References | |
| NUDOCS 9612050017 | |
| Download: ML20135B429 (3) | |
Text
- __ _ . __ _ __ . __.
MEMORANDUM T0: Chairman Jackscn
, Commissioner Rogers
. Commissioner Dicus
. Commissioner Diaz Commissioner McGaffigan FROM: James M. Taylor y,g ggpj.gn0dDI Executive Director for Operations g,Tgylor
SUBJECT:
INVENTORY OF URANIUM AT PARKS TOWNSHIP SHALLOW LAND DISPOSAL AREA During the staff briefing on the Site Decommissioning Management Plan on October 7, 1996, the Commission raised questions about the total inventory of uranium in the shallow trenches at the Parks Township Shallow Land Disposal Area (SLDA). In response to one of these questions, the staff incorrectly indicated that the trenches contain from one to three metric tons of high enriched uranium.
4 Based on our evaluation of the licensee's submittals, we estimate the total inventory of uranium (natural, low enriched, high enriched and depleted) to be 1 one to three metric tons. This estimate was developed by the licensee on the basis of historical waste disposal records. Using analysis of water samples the licensee determined an average enrichment of 15 percent uranium-235, which implies a total uranium-235 inventory of 150 to 450 kilograms.
However, since historical information is not as reliable as direct sampling, the staff believes that better substantiated estimates for the quantity of uranium-235 in the trenches are available. One such estimate, developed on the basis of downhole gamma measurements conducted by the licensee, is 100 kilograms uranium-235. Based on other sampling techniques involving leachate and sediment samples, the cstimate could be as high as 650 kilograms. The staff is confident that the true inventory of uranium-235 is between these two values. A more precise estimate of the total uranium-235 in the trenches and 1 the basis for this estimate will be documented as part of the Draft Environmental Impact Statement for the decommissioning of the SLDA. j cc: OGC OPA OCA OCAA OIG 9612050017 961114 PDR ADOCK 07003085 SECY C PDR h
CONTACT: Heather Astwood, NMSS 415-5819
%h DISTRIBUTION: Central File. LLDP r/f DWM r/f NMSS r/f PUBLIC JGreeves MFederline DCodell NKStablein JBradbury RBellamy TJackson HAstwood JDav,'s Path and File Name: s:/dwm/lldp/hma/ correct *See previous concurrence
/
OFC LLDP Editor DWM NMSS NMSS DE6S (D0 NAME MWeber* EKraus* JGreeves* MKnapp* CPaperiello* Hh ay r DATE_ ___ _ 1_0/8/% 10/8/% 10/18/96 11/5/96 11/6/96 11/fd96 11/ 96 U4UU(( OFFICIA RECORD COPY
, '/
ACNW: YES NO Category: Proprietary or CF Only A J j_ / ' / /
IG : YES N0 /
LSS : YES NO Delete file after distribution: Yes No
e s y at:
0 g 3v . . -4 UNITED STATES
. s* g NUCLEAR REGULATORY COMMISSION 2 WASHINGTON, D.C. 20555-0001
- November 14, 1996 I I
MEMORANDUM T0: L !rman Jackson Commissioner Rogers Commissioner Dicus Commissioner Diaz Commissioner McGaffigan FROM: James M. Taylor y#
Executive Dire or for perations
SUBJECT:
INVENTORY OF RANIUM AT PARKS TOWNSHIP SHALLOW LAND DISPOSAL I AREA l
- 1 During the staff briefing on the Site Decommissioning Management Plan on October 7,1996, the Commission raised questions about the total inventory of uranium in the shallow trenches at the Parks Township Shallow Land Disposal l Area (SLDA). In response to one of these questions, the staff incorrectly 1 indicated that the trenches contain from one to three metric tons of high enriched uranium.
Based on our evaluation of the licensee's submittals, we estimate the total l inventory of uranium (natural, low enriched, high enriched and depleted) to be '
one to three metric tons. This estimate was developed by the licensee on the basis of historical waste disposal records. Using analysis of water samples I the licensee determined an average enrichment of 15 percent uranium-235, which implies a total uranium-235 inventory of 150 to 450 kilograms.
However, since historical information is not as reliable as direct sampling, the staff believes that better substantiated estimates for the quantity of uranium-235 in the trenches are available. One such estimate, developed on the basis of downhole gamma measurements conducted by the licensee, is 100 kilograms uranium-235. Based on other sampling techniques involving leachate and sediment samples, the estimate could be as high as 650 kilograms. The staff is confident that the true inventory of uranium-235 is between these two values. A more precise estimate of the total uranium-235 in the trenches and the basis for this estimate will be documented as part of the Draft Environmental Impact Statement for the decommissioning of the SLDA.
cc: OGC OPA OCA OCAA OIG SECY CONTACT: Heather Astwood, NMSS 415-5819
MEMORANDUM TO: Chairman Jackson Commissioner Rogers Commissioner Dicus -
)
Commissioner Diaz l Commissioner McGaffigan l i
FROM: James M. Taylor .
Executive Director for Operations /
]
SUBJECT:
INVENTORY OF URANIUM AT PARKS TOWNSHI HALLOW LAND DISPOSAL !
AREA i
)
During the staff briefing on the Site Decommiss oning Management Plan on )
October 7,1996,theCommissionraisedquestion}saboutthetotalinventoryof ;
uranium in the shallow trenches at the Park / Township Shallow Land Disposal !
Area (SLDA). The staff wishes to clarify response to a question that the trenches contained from one to three metr c tons (1.1 to 3.3 short tons) of high enriched uranium. Based on stafffs evaluatiori of the licensee's submittals, the total inventory of tranium (natural low enriched, high enriched, and depleted uranium) iHstimated to be 1 to 3 metric tons based on itsreviewofhistoricalwastecjitposalrecords. Using analysis of water samples, the licensee determined an average enrichment of 15 percent uranium-235. However, since direct sampling, the staff)s,/the historical informati')n is not as reliable asbest estim thetrenchesis100 kilograms (220 lgs),basedondownholegammameasurements conducted by the licensde. Based on other sampling techniques involving leachate and sediment / samples. the estimate could be as high as 650 kilograms (1433 lbs). The stiff is confident that the true inventory of uranium-235 is between these tw'o' estimates. A more precise estimate of the total uranium-235 in the trenches and the basis for this estimate will be documented as part of the Draft E dronmental Impact Statement for the decommissioning of the SLDA.
Contact:
Heather Astwood NMSS 415-5819
/ DH PROOFED 10/16/96 DISTRIBUTION: Central File LLDP r/f DWM r/f NMSS r/f PUBLIC JGreeves MFederline DCodell NKStablein JBradbury RBellamy TJackson HAstwood JDavis Path and File Name: s:/dwm/lldp/hma/ correct *See previous concurrence OF C LLDP Editor DWM ., NMSSl/ / NMy!I[h DEDS EDO MAME MWeber* EKraus