ML20217M296

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Provides Addl Changes to Updated SAR Certificate Amend Request,Including Changes Made IAW Item 5 of Plan of Action Schedule for Compliance Plan Issue 2 & Changes That Resulted from Reevaluation of Autoclave head-to-shell O-ring
ML20217M296
Person / Time
Site: Portsmouth Gaseous Diffusion Plant
Issue date: 10/15/1999
From: Toelle S
UNITED STATES ENRICHMENT CORP. (USEC)
To: Kane W
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML20217M301 List:
References
GDP-99-0171, NUDOCS 9910270189
Download: ML20217M296 (4)


Text

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w R, r USEC A Global Energy Company October 15,1999 GDP 99-0171 r

i Mr. William F. Kane g

Director, Office of Nuclear Mat: rial Safey and Safeguards Attention: Doctiment Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Portsmouth Gaseous Diffusion Plant (PORTS)

Docket No. 70-7002 Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes

Dear Mr. Kane:

By letter dated October 31,1997 (Reference 1), USEC submitted a certificate amendment request (CAR) containing the Safety Analysis Report Update (SARUP) required by Issue 2 of DOE /ORO-2027," Plan for Achieving Compliance with NRC Regulations at the Portsmouth Gaseous Diffusion Mant" (the Compliance Plan), for.NRC review and approval. By letters dated April 30,1998 (Reference 2), October 19,1998 (Reference 3), November 20,1998 (Reference 4), May 10,1999 i

(Reference 5), June 1,1999 (Reference 6), July 72,1999 (R:fbrence.7), and August 31.1999 (Reference 8) USEC' submitted proposed changs to the SARUP certificate amendment request.

This letter provides additional changes to the SARUP certificate amend. ment request. These changes to the SARUP certificate amendrrmt request include changes made in accordance with item 5 of the j

Plan of Action and Schedule for Lompliance Plan Issue 2.

Additionally, this submittal contains SARUP changen thr. resulted from the re-evaluation of the autoclave head-to-shell G ring leakage analysis provided by DOE SARUP repons. The original commitment to perform this review is contained in Table 1, Item 7 of Reference 1. A notification

'of a change.in the original commitment due date is contained in Reference 9. This re-evaluation found that the SARUP autoclave models used to assess autoclave conditions during a proposed accident were overly conservative with respect to predicting temperatures and pressures. New release rates wee c.alculated based on two different hole location cases. While the new release rates are slightly higikr: ban those presented previously in the SARUP, they are insignificant with respect bO to the release rateicalculated for the respective bounding accident.

g 9910270189 991015 k

PDR ADOCK 07007002 C

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.r-r%M i * ( a 6903 Pockledge Drive, Bethesda, MD 20S17-1818 Telephone 301-564 3200 Fax 301-564-3201 http://www.usec.com Offices in Liverre. ore, CA Paducah. KY Portsmouth, OH Washington. DC k.$

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) 's E Mr. William F. Kane

October 15,1999 -
GDP 99-0171, Page 2 The re-evaluation determined that the basic conclusions for the applicable accident analysis scenario do not change,' in~that (1) the release is still bounded; and (2) the release from the closed autoclave would be maintained below Evaluation Guidelines for this type of accident. Additional infonnation

. is provided in Enclosure 2.?

Enclosure 2 to this letter provides a detailed description of the proposed changes. Revised SARUP pages are provided in Enclosure 3. Revisions are noted by a revision bar in the right-hand page margin for the TSRs, and by a revision bar in the left-hand ;nargin for the other SARUP sections.

- Any questions regarding this matter should be directed to Mark Smith at (301) 564-3244. There are

' no new commitments contained in this submittal.

~ Sincerely, I

i r

S. #. L Steven A. Toelle-

- Nuclear Regulatory A'ssurance and Policy Manager -

References:

' l. Letter from James H. Miller (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request _. Update the Application Safety Analysis Report, USEC

- Letter GDP 97_-0189, October 31,1997.

2. Letter from James H. Miller (USEC) to Dr. Carl J. Pcperiello (NRC), Certificate Amendment Request - Update the Application Safety Analys_is Report - Proposed Changes, USEC Letter GDP 98-0096, April 30,1998.
3. Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes, USEC Letter GDP 98-0212, October 19,1998.

L 4. Letta from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes, USEC Letter GDP 98-0251, November 20,1998.

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Mr. William F. Kane October 15,.1999 l

GDP 99-0171, Page 3 i

References (continued):

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5. Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - Proposed Changes, USEC Letter GDP 99-0076, May 10,1999.

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6. Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amer.' nent Request - Update the Application Safety Analysis Report - Proposed a

Changes, USEC Letter GDP 99-0084, June 1,1999.

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7. Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Application Safety Analysis Report - P: posed q

Changes USEC Letter GDP 99-0120, July 22,1999.

8. Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Update the Apolication Safety Analysis Report - Proposed Changes, USEC Letter GDP 99 P153, August 31,1999.
9. Letter from Steven A. Toelle (USEC) to Dr. Carl J. Paperiello (NRC), Certificate Amendment Request - Notification of Change in Regulatory Commitments, USEC Letter GDP 99-0098, June 17,1999.

Enclosures:

1. Oath and Affirmation
2. United States Enrichment Corporation (USEC), Proposed Changes, Certificate Amendment Request, Update the Application Safety Analysis Report, Detailed Description of Change
3. Proposed Changes, Certificate Amendment Request, Safety Analysis Report Update, Insertion / Removal Instructions, October 8,1999

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l cc: Robert C. Pierson, NRC Special Projects Branch Patrick L. Hiland, NRC Region 111 David Hartland, NRC Resident inspector - PORTS Kenneth O' Brien, NRC Resident Inspector - PGDP Randall M. DeVault, DOE Regulatory Oversight Manager i

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OATII AND AFFIRMATION J, Steven A. Toelle, swear and affirm that I am the Nuclear Regulatory Assurance and Policy Manager of the United States Enrichment Corporation (USEC), that I am authorized by USEC to sign and file with the Nuclear Regulatory Commission these proposed changes to the Safety Analysis 1

Report Update for the Portsmouth Gaseous Diffusion Plant, as described in GDP 99-0171, that I am familiar with the contents thereof, and that the statements made and matters set forth therein are true and correct to the best of my knowledge, Information, and belief.

/J

s. A.

I Steven A. Toelle On this 15th day of October 1999, the individual signing above personally appeared before me, is known by me to be the person whose name is subscribed to within the instrument, and acknowledged that he executed the same for the purposes therein contained.

In witness hereofI hereunto set my hand and official seal.

I h

{ ' net M Boothe, Notary Public State of Maryland, Montgomery County My commission expires June 23,2003