ML20203A230

Requests Addl Info Re 970915 Application for Amend to Certificate of Compliance Revising Technical Safety Requirement 2.3.4.7, Criticality Accident Alarm Sys, Required Action A.1.5

ML20203A230
Person / Time
Site:	07007001
Issue date:	02/12/1998
From:	Cox C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:	John Miller UNITED STATES ENRICHMENT CORP. (USEC)
References
TAC-L32047, NUDOCS 9802230311
Download: ML20203A230 (2)

Text

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,,.' February 12. 1998 Mr. J:mes H. Miller Vice President, Production U. 8. Enrichment Corporation 2 Democracy Center 6903 Rockledge Drive Bethesda, MD 20817

SUBJECT:

PADUCAH CERTIFICATE AMENDMENT REQUEST PRODUCT AND TAILS WITHDRAWAL CRITICALITY ACCIDENT ALARM SYSTEM (TAC NO. L32047)

Dear Mr. Miller:

This refers to your application dated September 15,1997, requesting an amendment to the Certificate of Compliance for the Paducah Gaseous Diffusion Plant to revise Technicel Safety Requirement (TSR) 2.3.4.7, Criticality Accident Alarm System (CAAS), Required Action A.1.5, to provide additional time to operate the withdrawal station in normal steady state operation should the CAAS be declared inoperable and the required actions entered.

Our review of your application has identified additional information that is needed before final action can be taken on your request. The additionalinformation, specified in the enclosure, should be provided within 30 days of this letter. Please reference the above TAC No. In future correspondence related to this request.

If you have any questions, I can be reached at (301) 415-7655.

Sincerely, oW @d BY Charles Cox Mechanical Systems Engineer Special Projects Branch Division of Fuel Cycle Safety )g and Safeguards, NMSS i Docket 70-7001 Certificate GDP 1

Enclosure:

As stated ec: Mr. Randall DeVault, DOE Mr. Steve Polston, PGDP DISTRIBUTION: w/ encl.(Control No. 320S)

Docket 70 70o1 $tRC Mie Center 'd PUBLIC Alli JJacobson, Ritt NMSS t/f PCSS t/f SPB r/t PHiland, Rill lOFC SPB SPB _

,SPB b SPB h -SPB lNAME C :ll P t ( Hoadley Iin DATE A//I /98 A A98 N/98 7z b98 / /98 lllllll ll ! l!l lll*

C = COVER E = COVER & ENCLOSURE N = NO COPY g:lRAICAAS.CXC OFFICIAL RECORD COPY DR D 0 01 - '

C PDR

e-6 4; ... st for Additivnallnformation Appution Dated September 15,1997 United States Enrichment Corporation Pcducah Gaseous Diffusion Plant Docket 70 7001 P

Please provide the following information:

1. Corrosion trend information and current wall thickness measurements for the accumulators and condensers in the Product Withdrawal station.

2. A brief discussion of the control specifics to accomplish a controlled cascade recycle mode

. (i.e., specifically indicate the level of human action necessary to maintain thir state versus automatie, engineered control).

3. A brief discussion of the number of Normetex pump failures associated with the withdrawal station or, if no pump failureb occurred, provide a brief discussion of the number of automatic activations of safety systems to preclude over pressurization or other failures in the pump. Conservative estimates are acceptable.

4. Information concoming the discharge location / vessel of the scale pit sump pumps.

ENCLOSURE i=M' 44p-M'r +%%ggyMaum e * *  % s*$

.J

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