ML20210J792
| ML20210J792 | |
| Person / Time | |
|---|---|
| Site: | Portsmouth Gaseous Diffusion Plant, Paducah Gaseous Diffusion Plant |
| Issue date: | 07/27/1999 |
| From: | Adams J UNITED STATES ENRICHMENT CORP. (USEC) |
| To: | Paperiello C NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20137Z129 | List: |
| References | |
| GDP-99-0136, NUDOCS 9908050099 | |
| Download: ML20210J792 (3) | |
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V USEC A Global Energy Company July 27,1999 GDP 99-0136 Dr. Carl J. Paperiello Director, Office of Nuclear Material Safety and Safeguards U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 Paducah Gaseous Diffusion Plant (PGDP)
Portsmouth Gaseous Diffusion Plant (PORTS)
Docket Nos. 70-7001 & 70-7002 Submittal of NRC Form 327, "Special Nuclear Material (SNM) and Source Material (SM)
Physical Inventory Summary Report" INFORMATION TRANSMITTED HEREWITH IS PROTECTED FROM PUBLIC DISCLOSURE AS CONFIDENTIAL COMMERCIAL OR FINANCIAL INFORMATION AND/OR TRADE SECRETS PURSUANT TO 10 CFR 2.790(d)(1)
Dear Dr. Paperiello:
As required by 10 CFR 74.17(a) and the Fundamental Nuclear Material Control Plans (FNMCPs),
l the United States Enrichment Corporation (USEC) is submitting to the United States Nuclear Regulatory Commission (NRC) SNM and SM Physical Inventory Summary Reports for the Paducah, Kentucky, and Portsmouth, Ohio, Gaseous Diffusion Plants. These Form 327 documents in Enclosures 1 and 2 cover the inventory periods ending May 28,1999, for both plants.
The inv6ntory for Portsmouth was taken at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on May 28,1999. The inventory for Paducah was taken at 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br /> on May 28,1999.
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' includes bi-monthly, cascade inventory data for Portsmouth for the period April 1,1999 through May 28,1999:
(79 Line 7 includes an entry to correct for statistically significant biases which were present in l
accountability measurement systems. The corrections were derived from measurement control -
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data for accountability measurements performed during the inventory period. The primary contributor to this adjustment was a change in the bias present in on-line, mass spectrometer measurements of the *U enrichment of tails produced during the period. A bias correction factor 9900050099 990727 PDR ADOCK 07007001 l
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U d iI U.! l 6903 Rockledge Drive. Bethesda. NID 20817 1818 Telephone 301-564-3200 Fax 301-56+3201 http://www.usec.com Offices in Livermore.CA Paducah KY Portsmouth, OH Washington DC lu
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Dr. Carl J. Paperiello July 27,1999 GDP-99-0136, Page 2 had been applied to the enrichment measurement for each cylinder produced. This correction factor was based on liquid sample data obtained in previous periods. Results ofliquid samples taken on cylinders produced during the April-May 1999 period indicated that the bias was no longer present. An adjustment was made on Line 7 of the Form 327 to nullify the application of bias to individual cylinders.
Prior Period Adjustments on Line 8 reflect corrections made primarily to Low Enriched Uranium product cylinders withdrawn in prior periods which were sampled in the April-May 1999 period.
I The resulting Inventory Difference (ID) for uranium element exceeded the 2-sigma Warning e
Limit, but was within the 3-sigma Alarm Limit. An investigation has been initiated. The "U isotope was within control limits. includes bi-monthly, cascade inventory data for Paducah for the period April 1,1999 through May 28,1999:
The ID reported on Line 6 includes an adjustment of-174 grams "U to correct assay changes 2
for product withdrawals from the cascade in prior months. A Prior Period Adjustment (PPA) is entered on Line 8 to reflect this one-time correction.
Line 7 includes an entry to correct for statistically significant biases which were present in accountability measurement systems. The corrections were derived from measurement control data for accountability measurements performed during the inventory period.
2 The resulting ids for uranium element and for "U were within all control limits.
Enclosures 1 and 2 contain information concerning USEC's material control and accounting program for special nuclear material at both plants. As such, Enclosures 1 and 2 contain confidential commercial or financial information that is exempt from public disclosure pursuant to Section 1314 of the Atomic Energy Act of 1954, as amended, and 10 CFR 2.790(a)(4),2.790(d)(1) and 9.17(a)(4).
USEC hereby requests that Enclosures 1 and 2 be withheld from public disclosure based on 10 CFR 2.790(d), which states, in part:
l The following information shall be deemed to be commercial or financial information within the meaning of 9.17(a)(4) of this chapter and shall be subject to disclosure only in j
accordance with the provisions of 9.19 of this chapter, j
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lDr. Carl J. Paperiello
. July 27,1999 -
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. GDP-99-0136, Page 3 (1). : Correspondence and reports to or from the NRC which contain information or records conceming a licensee's or applicant's physical protection or material control and accounting program for special nuclear material not otherwise designated as Safeguards Information or classified as National Security Information or Restricted Data.
There are no new commitments made in this letter. Should you have any questions or comments on the enclosed information, please call Jere Bracey at PGDP at (270) 441-5928 or David Shisler at
- PORTS at (740) 897-2182.
Sincerely, k
=-
ohn G. Adams.
Safety.and Health Assurance Policy Manager
Enclosures:
As stated cc:Watrick Hiland, NRC Region III Office David Hartland, NRC Resident Inspector - PORTS Ken O'Brien, NRC Resident Inspector - PGDP k
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