ML20199A420

Refers to 970506 Application for Amend to Coc for Portsmouth Gaseous Diffusion Plant to Delete Technical Safety Requirement 2.2.4.1 Concerning Seal Exhaust Pump Oil Overflows.Addl Info Specified in Encl Is Required

ML20199A420
Person / Time
Site:	Portsmouth Gaseous Diffusion Plant
Issue date:	01/16/1998
From:	Yawar Faraz NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To:	John Miller UNITED STATES ENRICHMENT CORP. (USEC)
References
TAC-L32031, NUDOCS 9801270211
Download: ML20199A420 (3)

Text

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Janusry 16, 1998 .

Mr. James H. Miller Vice President, Production

• U. S. Enrichrpent Corporation 2 Dentocracy Center '

6903 Rockledge Drive Bethesda. MD 20817

SUBJECT:

PORTSMOUTH CERTIFICATE AMENDMENT REQUEST DELETION OF TSR 2.2.4.1 ENTITLED ' SEAL EXHAUST PUMP OVERFLOWS' REQUEST FOR ADDITIONAL INFORMATION (TAC NO. L32031)

Dear Mr. Miller:

This refers to your application dated May 6,1997, requesting an amendment to the Certificate of Compliance for the Portsmouth Gaseous Diffusion Plant to delete Technical Safety Requirement (TSR) 2.2.4.1 concombg seal exhaust pump oi! overflows.

Our review of your application and several discussions with Mr Ed Wagner of your technical staff have 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 15 days of this letter in order for NRC to maintain its current review schedule for this amendment request. Please noto that Mr. Wagner has already provided answers to most of the questions by phone. Please reference the above TAC No. In future correspondence related to this request.

If you have any questions regarding this matter, please contact me at (301) 415-8113.

Sincerely, Original Signed By Yawar H. Faraz Project Manager Enrichment Section , (,o y Special Projects Branch h') t '

Division of Fuel Cycle Safety I and Safeguards, NMSS Docket 70 7002 i Certificate GDP 2

Enclosure:

As stated

g. h My cc: Mr. Randall DeVault, DOE Mr. Jim Mo.3an, PORTS Mr. Steve Toolle, USEC DISTRIBUTION: w/ encl. (Control No.120S)

Docket 70-7002 HRC File Centog PUBLIC DHartland, Rlli JJacobson, Rill JDavis, FCOB ' WSchwink CCox RPierson NMSS r/f FCSS r/f SPB r/f PHiland, Rlll G:%MD6RAl.POR '

OFC SPB E SPB .

/ SPB,, _

NAME YFaraz DHos[ey [Mn DATE I /16/98 [/ /98 / /k/ /98 C = COVER E = COVER & ENCLOSURE N = NO COPY OFFICIAL RECORD COPY hC D

PDR 2 i

l Mr. James H. Miller Vice President, Production i V. S. Enrichrpent Corporation l 2 DerMperacy Center 6903 Rockledge Drive -

Bethesda, MD 20817 l

SUBJECT:

PORTSMOUTH CERTIFICATE AMENDMENT REQUEST - DELETION OF TSR 2.2.4.1 ENTITLED

• SEAL EXHAUST PUMP OVERFLOWS" REQU ST FOR ,

ADDITIONAL INFORMATION (TAC No. L32031)

}

Dear Mr. Miller:

}

This refers to your application dated May 6,1997, requesting an amend ni to the Certificate of  ;

Compliance for the Portsmouth Gaseous Diffusion Plant to delete Tech ical Safety Requirement ,

(TSR) 2.2.4.1 conceming seal exhaust pump oil overflows,

t Our review of your application and several discussions with Mr. Ed agner of your technical staff have identified additional information that is needed before final tion can be taken on your  ;

request. The additionalinformation, specified in the enclosure hould be provided within 15 days of this letter. Please reference the above TAC No. In fu re correspondence related to this request.

If you have any questions regarding this matter, please niact me at (301) 415-8113.

Sincerely, r

Yawar . Faraz Proj t Manager En ' hment Section ecial P.*ojects Branch ivision of Fuel Cycle Safety and Safeguards, NMSS Docket 70 7002 Certificate GDP 2

Enclosure:

As stated cc: Mr. Randall Deva t, DOE Mr. Jim Morga ORTS Mr. Steve To e,USEC DISTRIBUTION: / encl. (Control No.120S)

Docket 70 700 NRC File Center PUBLIC DHartland, Rlli JJacobson, 1 JDavis, FCOB WSchwink CCox RPierson

• NMSS r/f FCSS r/f SPB r/f PHiland, Rill G:\AMD6Rkl.POR t OFC[ SPB f SPB b SPB l NAkE- YFaraz:ikA}FDHoadley DMartin DATE I / ifl98 l / N/98 / /98 C = COVER E = COVER & ENCLOSURE N = NO COPY I '

OFFICIAL RECORD COPY

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Request for Additionallnformation I

- ,,' . Application Dated May 6,1997 i United States Enrichment Corporation l Portsmouth Gaseous Diffusion Plant Docket 70 7002 ,

Seal Exhaust Pump Oil Overflow Deletion Certificate Amendment NRC Questions Please provide the following information:

1. Please provide documented evidence of the hydrocarbon oil properties or the maximum range of such properties used in the PORTS Seal Exhaust Pumps (i s., manufacturers' data sheet or equivalent). Please include: molecular weight, additives, viscosity breakdown temperatures, etc.

2. Please provide documented evidence of the maximum quantity of antioxidant additive and its chemical form lor the hydrocarbon oil of interest.

3. Please provide documented evidence of the experimental volume determinations for the S/E pumps in all areas covered by the amendment request. Please include a description of the method used and the uncertainty associated with such measurements including the manufacturers' tolerances. Also provide the maximum volumes for S/E pumps that PORTS commits to maintaining.

4. Please provide a short technical discussion of the controls relied upon for not exceeding the enrichment level for each seal exhaust station of interest and a discussion / justification of the reliability / availability of such controls.

5 Please provide a discussion of the differences between the Stokes-Penwalt Pumps and the Kinney pumps since the experimental data establishing the upper limit on uranium loading is based upon Stokes Penwalt pumps at the Paducah Site. Specifically, provide information concerning any Differential Pressure filter differences in addition to other pertinent information.

6. Please provide justification for the extended range of applicability of the uranium loading graph provided to the NRC concerning uranium settling in oil ever time for the range of 17 wt% to 40 wt%. Also, provide a discussion / justification of the time frame for settling considered in this graph and how such periods relate to settling over extended periods of time (i.e., days to weeks).

7. Please provide a discussion / justification of the heat of reaction temperature effects on expected viscosity rise and how this relates to maximum uranium loading prior to pump failure (i.e., since pump shutdown relies upon the UF6 oil reaction to increase the density and viscosity of the oil, the heat of reaction effect on " holding down" the effective viscosity rise must be considered when establishing acceptable / predictable control properties). Please consider both a rapid addition of UF6 and a slow or sporadic UF6 addition over time. Also, please provide a discussion of the maximum uranium loading expected prior to pump failure for a hydrocarbon oil that has had viscosity breakdown due to normal and extended use prior to oil change.

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