ML20217P531
| ML20217P531 | |
| Person / Time | |
|---|---|
| Site: | Paducah Gaseous Diffusion Plant |
| Issue date: | 02/27/1998 |
| From: | Toelle S UNITED STATES ENRICHMENT CORP. (USEC) |
| To: | Paperiello C NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| GDP-98-0019, GDP-98-19, TAC-L32043, NUDOCS 9803100308 | |
| Download: ML20217P531 (5) | |
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A Global Energy company February 27,1998 GDP 98-0019 Dr. Carl J. Paperiello Director, Office of Nuclear Material Safety and Safeguards Attention: Document Control Desk United States Nuclear Regulatory Commission Washington, DC 20555 0001 d
Paducah Gaseous Diffusion Plant (PGDP) i Docket No. 70-7001 Response to NRC Request for Additional Information (TAC NO. L32043)
Dear Dr. Paperiello:
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The purpose of this letter is to respond to your February 5,1998, letter that requested additional informat on concerning the Safety Analysis Report Update. Responses are provided in the enclosure.
i If you have any questions on USEC's responses, please call me at (301) 564-3250 or Steve Routh at (301) 564-3251. There are no new commitments identified in this submittal.
Sincerely,
- 5. A.
If Steven A. Toelle Nuclear Regulatory Assurance and Policy Manager I
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Enclosure:
Response to NRC Request for Additional Information Concerning Paducah Safety Analysis Report Update (TAC No. L32043), United States Enrichment Corporat. ion, Paducah Gaseous Diffusion Plant, Docket No. 70-7001
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NRC Resident Inspector-PGDP NRC Resident Inspector-PORTS Mr. Robert C. Pierson (NRC)
Mr. Randall M. DeVault (DOE) k!! *
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6903 Rockledge Drive, Bethesda, MD 20817-181S Telephone 301-564-3200 Fax 301-564-3201 http://www.useo.com 00 ices in Livermore, CA Paducah, KY Ponsmouth, OH Washington, DC
Enclosure GDP 98-0019 Page1of4 Response to NRC Request for Additional Information Concerning Paducah Safety Analy:,is Report Update (TAC NO. L32043)
United States Enrichment Corporation Paducah Gaseous Diffusion Plant Docket No. 70-7001 Ouestion 1 OJRC 2/5/98 Letter) i This refers to your application dated August 18,1997, and October 31,1997, requesting amendment to Certificate of Compliance GDP-1, updating the application Safety Analysis Report (SAR).
Our review of your application has identified additional information that is needed. The initial review has verified the statement in your letter (GDP 97-0244) to NRC Secretary, John Hoyle, dated December 30,1997, that the liquid withdrawal areas of Buildings C-310 and C 315 at the Paducah Gaseous Diffusion Plant are susceptible to seismically induced damage. You further indicated that analysis of modifications in C-310 and C-315 is underway. Your letter further implied that the C-310 and C-315 may contribute signitantly to the overall seismic risk at Paducah. Based on this information, the staff requests answers to the following questions, as they apply to Buildings C-310 and C-315:
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Provide a detailed description of the structural and equipment failures that occur, as listed in Table 3.15.8, " Seismic Capacities of Buildings C-310/C-310-A Piping Equipment and Componeuts" and Table 3.15-9 " Seismic Capacities of Building C-315 Piping Equipment and Components."
Resnonse A detailed description of the structural and equipment failures is provided in Tables A-7 and A-8 of the Justification for Continued Operation submitted to the NRC by USEC letter UDP 98-0031 dated February 25,1998.
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Enclosure GDP 98-0019 Page 2 of 4 Ouestion 2 (NRC 2/5/98 Letter) 2.
In terms of releases, provide an analysis of an describe in more detail the potential consequences, both onsite and offsite, associated with these failures. Include the bases of the assumptions made in Secticn 4.3.2.5.3.c., " Source-Term Analysis."
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An analysis of the consequences of postulated seismic releases and an assessment of the onsite and offsite impacts is provided in the Justification for Continued Operation submitted to the NRC by USEC Letter GDP 98-0031 dated February 25,1998.
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Enclosure GDP 98-0019 Page 3 of 4 Ouestion 3 (NRC 2/5/98 Letter) 3.
Describe the analysis of modifications that are underway. When will those analyses be completed and provided to NRC?
Response
' By USEC letter GDP 97-0201 dated December 1,1997, the updated seismic risk analysis required by Issue 36 of DOE /ORO-2026, " Plan for Achieving Compliance with NRC Regulations at the Paducah Gaseous Diffusion Plant," was transmitted to the NRC for approval. A's described in USEC letter GDP 98-0029 dated February 23,1998, an assessment is underway to determine the impact cf the updated seismic hazard on: (1) the final design of the planned seismic modifications to Buildings C-331 and C-335 and (2) the structural, piping, and equipment analyses reported in the SAR Update. A senedule for completing the impact assessment is provided in Enclosure I to the February 23,1998 letter.
At this time, the impact assessment of the updated seismic hazard is the only ongoing analysis related to the postulated seismic failures in Buildings C-310/310-A and C-315.
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Enclosure GDP 98-0019 Page 4 of 4 Ouestion 4 (NRC 2/5/98 Letter) 4.
Provide ajustification for continued operation of these buildings, given their susceptibility to seismically induced damage and the potential consequences. Consider in your answer your responses to the above questions.
Resnonse A Justification for Continued Operation was submitted to the NRC by USEC letter GDP 98-0031 dated February 25,1998.
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