ML20199L964

Informs That Review of Application & 1031, Requesting Amend to Coc GDP-1,updating Application Sar,Has Identified Addl Info That Is Needed.Answers to Listed Questions as Apply to Bldgs C-310 & C-315 Requested

ML20199L964
Person / Time
Site:	07007001
Issue date:	02/05/1998
From:	Pierson R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:	John Miller UNITED STATES ENRICHMENT CORP. (USEC)
References
TAC-L32043, NUDOCS 9802100082
Download: ML20199L964 (4)

Text

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1. %g p- 4 UNITED STATES g j 2

NUCLEAR REGULATORY COMMISSION WASHINGTON, D.c. 20N$0001 o

"h , a February 5, 1998 Mr. James H. Miller Vice President, Production U. S. Enrichment Corporation 2 Democracy Center 6903 Rockledge Drive Bethesda, MD 20817

SUBJECT:

PADUCAH CERTIFICATE AMENDMENT REQUEST - UPDATE OF THE APPlJCATION SAFETY ANALYSIS REPORT-(TAC NO. L32043)

Dear Mr. Miller:

This refers to your application dated August 18,1997 and October 31,1997, requesting Smendment to Certificate of Compliance GDP 1, updating the application Safety Analysis Report (SAR).

Our review of your application has identified additional bformation 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 indicatnd that analysis of modifications in C 310 and C-315 is underway. Your letter further implied that the C-510 and C-315 may contribute significantly 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:

1. Provide a detailed description of the structurt.1 and equipment failures that occur, as listed in Table 3.15.8, " Seismic Capacities of Buildings C-310/C-310-A Piping Equipment and Components" and Table 315-9 " Seismic Capacities of Building ,315 Piping Equipment and Components."

2. In terms of releases, provide an analysis of and describe in more detail the potential consequences, both onsite and "" site, associated with these failures, include the bases of the assumptiont 1ade in Section 4.3.2.5.3 c.," Source-Tenn Analysis."

3. Describe the analysis of modifications that are underway. When will those analyses be completed and provided to NRC?

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. Mr. J. H. Miller, USEC 2

4. ' Provido a justification for continued operation of these buildings, given their susceptiHlity to seismically induced damage and the potential consequences. Consider in your answer your responses to the above questions.

Due to the potential safety significance of this issue, the staff requests a response no later than 15 days from the date of this letter. If you have any questions, I can be reached at (301) 415-7192.

Sincerely, OM1nD' W Robert C. Pierson, Chief Special Projects Branch D; vision of Fuel Cycle Safety and Safeguards, NMSS Docket 70-7001 Certificate GDP 1 cc: Mr. Steve Polston, PGDP Mr. Randall DeVault, DOE DJSTRIBUTION:(TAC No. L32043)

Docket 70 7o01 j kRC File Conto () PUBLIC Alli JJacobson,Alli NMSS r/f FC$S r/t SPBr/f PHilland, Rlil

'See previous concurrence OFC SPB 'SPB 'SPB 'SPB Sbjh NAME IJ DPersinko DHoadlev DMartin Rierson DATE h/ 3/98 1/22/98 1/20/98 1/30/98 L/ k /98 l C = COVEH E = COVER & ENCLOSURE N = NO COPY G:\ seismic.cxc OFFICIAL RECORD COPY ik er

,; . , , _ .- Mr. James H.' Mi!Ier ,

. Vios Presiden' " *ction - d U. 8. Enricer 1ont c oration

\ Democracy Center 3 Rockledge 0,1ve y Bet' da,, Maryland 20817 ,

~

Dear Mr. er:

I am responding your letter _(GDP g7 0224) to NRC Secretary, John Hoyle, dated ___

Dec6mber 30,1gg , n which you indicated that the liquid withdrawal areas of Buildings C-310 and C-315 at the Pad h Gaseous Diffusion Plant are susceptible to seismically induced damege. You furtheri ed ihat analys:s of modifications in C 310 and C-315 is underway.

- Based on this information, t staff requests answers to the following questions, as they apply .a Buildings C 310 and C-315:

1. - Describe the structural and ipment failures that occur, and the associated earthquake .

acceleration levels at which th failures occur, at levels up to 0.18g peak ground _

acceleration.- Do any *rucker arm structures exist in Buildings C 310 and C 315,

_ - similar to those in Buildings C 331 a C 3357

2. In terrrs of releases, describe the conseq ces, both onsite and offsite, associated with -

each of these failures. Describe the overall sequences, both offsite and onsite, associated with all failures below 0.15g,0.185g, nd 0.18g peak ground acceleration.

3. Describe the analysis of modifications that are undo y. When will those analyses be O completed?

4. Justify the operation of these buildings, given their susceptib to seismically induced damage. Consider in your answer your responses to the above uestions.

The staff requests a response no later than 15 days from the date of this le . If you have any. o questions, I can be reached at (301) 415-71g2.

Sincerely, Robert C. Pierson, Chief-Special Project's Branch Division of Fuel Cycle Safety-and Safeguards, NMSS ' '

1BTRBUTION:

Docket 70-7001 PUBLIC NRC File Center _ Region til - NMSS r# FCSSr4-SPB r# MHorn - PPs'el KO'Brien Philand-Rill

. FILE NAME:(0:\31021Sqs.118]

See previous concurrence-

,OFFK:E - *SPB $ SPB- k APB- b SPB NAME' 'Nrsinko  % kHoodley - / Martin - ,RPierson DATE if22/98 - 1/ 1 /98, _ -1/2 8/98 il /hl

C = CCVER E = COVER & ENCLOSURE N = NO COPY OFFICIAL RECORD COPY

_ , . _____.___._____.____i.---.-- - _ _

Mr. James H. Miller Vice President, Production U. S. Enrichment Corporation

% 2 Democracy Center 6903 Rockledge Drive Bet,hesda,, Maryland 20817 Dear Mr. Miller.

I am res nding to your letter (GDP 97-0224) to NRC Sec etary, John Hoyle, dated Decembe 0,1997, in wbtet, you indicated that the liquid withdrawal areas of Buildings C-310 and C-315 the Paducah Gaseous Diffusion Plant, are susceptible to seismically induced damage. You rtner Indicated that analysis of modifications in C 310 and C 315 is underway.

Based on this in ation, the staff requests answers to the following questions, as they apply to Bulld!ngs C 310 an C 315:

1. Describe the stru ' ural and equipment failures that occur, and the associated earthquake acceleration levels which these failures occu., at levels up to 0.18g peak ground acceleration. Do any

• ker arm" type structures exist in Buildings C-310 and C-315,  ;

similar to those in Buildin C-331 and C 335?

2. In turms'of releases, describe t consequences, both onsite and offsite, associated with '

each of these failures. Describe th verall consequences, both offsite and onsite, associated with all failures below 0.15 0.165g, and 0.18g peak ground accelerstion.

3. Desenbe the analysis of modifications that a underway. When will those analyses be completed? l l

4. Justify the operation of these buildings, given their su eptibility to seismically induced  !

damage. Consider in your answer your responses to th bove questions.

The staff requests a response no later than 15 days from the date of is letter, if you have any questions, I can be reachcd at (301) 415 7192.

SincereY, Robert C. Pierson, Chief Special Projects Branch Division of Fuel Cycle Safety and Safeguards, NMSS DISTRIBUTION' Docket 70-7001 PUBLIC NRC File Center Region lil NMSSrA FCSSr4 SPBr4 MHorn PPatel KO'Brien PHiland-Rill FILE NAME:[G:\310215qs.115)

• See previous concurrence ._

CFFICE *SPB SPB SPB SPB 3 NAME X DPersint ; ,) DHoadley DMartin RPiuson DATE 1/22/98 1/ /98 1/ /98 il /98 C = COVER -- E = COVER & ENCLOSURE N = NO COPY OFFICIAL RECORD COPY

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