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Provides bi-monthly Update on Progress of Modifications to Upgrade Audibility of CAAS
	ML20195D565
Person / Time
Site:	Paducah Gaseous Diffusion Plant
Issue date:	06/01/1999
From:	Toelle S; UNITED STATES ENRICHMENT CORP. (USEC)
To:	Pierson R; NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
	GDP-99-0097, GDP-99-97, NUDOCS 9906090201
	Download: ML20195D565 (10)
	v • d • e

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,o USEC

.Ao m an.rsyc - y June 1,1999 GDP 99-0097 Mr. Robert C. Pierson.

Chief, Special Projects Branch Division of Fuel Cycle Safety and Safeguards, NMSS U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Paducah Gaseous Diffusion Plant (PGDP)

Docket No. 70-7001 Bi-Monthly Update on Progress of the CAAS Audibility Upgrade Project

Dear Mr. Pierson:

In accordance with the United States Nuclear Regulatory Commission's (NRC) request of December j

.17,1998 (Reference 1), this letter provides the bi-monthly update on the progress of the I

modifications to upgrade the audibility of the criticality accident alarm system (CAAS).

The design for the tie-in package, which will allow the final conversion from current CAAS horns to the new horns, has been completed. The first building scheduled to be transitioned to the new system is the C-310, Product Withdrawal Facility. The f' mal tie-in for C-310 is currently scheduled for mid-July. To minimize operational impacts, it is necessary for C-310 to be tied-in during the summer power reduction since final tie-in requires the CAAS to be declared inoperable in C-310.

In accordance with the current LCO actions, an inoperable CAAS in C-310 requires cylinder filling to be discontinued after completion of the current filling operation restricting the ability to withdraw

-l product. To begin the final tie-ins for C-310, NRC approval of the TSR changes submitted in Reference 2 is required. In Reference 3, USEC was notified that the NRC anticipates completing

. review of these TSR changes by June 30,1999. The schedule for the CAAS modification project was developed assuming that the TSR changes associated with this modification would be approved in June 1999. To support this schedule, USEC requests that the TSRs associated with the CAAS modifications receive an expedited review.

MlO Installation o,,f air compressors, conduit, and pipe hangers is progressing. Accumulator tank foundations are currently being installed, with the first set of four accumulator tanks scheduled for delivery and installation in June. A schedule detailing construction completion, testing, and tie-ins has been developed for integration into the plant's overall operation and maintenance schedule. A summary of this schedule is included as Enclosure 1.

9906090201 990601 9

id PDR ADOCK 07007001 9 l

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PM 6903 Rockledge Drive. Bethesda, MD 20817-1818 Telephone 301-564-3200 Fax 301-564 3201 http://www.usec.com

. Offices in Livermore, CA Paducah, KY Portsmouth, OH Washington, DC

y.-

' Mr. Robert C. Pierson

]

June 1,1999 y

GDP 99-0097, Page 2

-l Should you have any questions related to this subject, please contact me at (301) 564-3250 or Mark Smith at (301) 564-3244. There are no new commitments contained in this submittal.

j Sincerely, S. A.

I Steven A.Toelle q_

Nuclear Regulatory Assurance and Policy Manager

-l

}

j

Enclosure:

Schedule for CAAS Audibility Upgrades h

Reference:

1.

Letter from Robert C. Pierson (NRC) to Steven A. Toelle (USEC), " Schedule for

{

Criticality Accident Alarm System Audibility Upgrades (TAC No. L32103),"

. December 17,1998.

o i

2.

Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), "Paducah Gaseous Diffusion Plant, Docket No. 70-7001, Certificate Amendment Request -

j Criticality Accident Alarm System Audibility Upgrades," Letter No. GDP 99-1 0045, dated March 1,1999.

{

3.

Letter from Yen-Ju Chen (NRC) to James H. Adkins (USEC), "Paducah Certificate Amendment Request: Criticality Accident Alarm System Audibility Upgrades-Change in Projected Completion Date (TAC No. L32111)," dated May 6,1999.

].

]

cc: Mr. P. L. Hiland (NRC Region III Office) i NRC Resident Inspector - PGDP

]~

NRC Resident Inspector - PORTS Mr. Randall M. DeVault (DOE) 1 1

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ML20195D565

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ML20195D565

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Enclosure:

Reference:

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