ML20195F090
| ML20195F090 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/02/1986 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | Taylor J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 8606090348 | |
| Download: ML20195F090 (2) | |
Text
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D TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 SN 157B Lookout-Place June 2, 1986 Mr. James M. Taylor, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Taylor:
In the Matter of the
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Docket Nos. 50-327 Tennessee Valley Authority
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50-328 By your letter dated April 22, 1986 to S. A. White, NRC transmitted inspection report Nos. 50-327/86-27 and 50-328/86-27.
In recent months, there have been several reviews of the engineering / design process of TVA by different organizations--Gilbert / commonwealth, TVA's Office of Engineering (now the Division of Nuclear Engineering), and NRC.
These reviews have raised specific technical concerns and have led to the conclusion that the previously existing TVA engineering / design control process was weak.
Our concerns and conclusions are generally consistent with those summarized in your letter dated April 22, 1986.
Since June 1985. TVA has started implementing major changes in the engineering management system and the engineering / design control process. The change was self-initiated and is well underway.
TVA has added a siginificant number of outside management and engineering personnel to its staff to develop, implement, and further improve the new engineering / design control process.
This extensive upgrade program will result in one of the most tightly controlled programs in the industry.
Our overall assessment of the concerns identified in your letter is that they relate to identified weaknesses in the TVA engineering / design control program which is being upgraded.
In view of the above, 'rather than invest our'immediate efforts into justifying the individual as-found conditions, we consider it essential to take corrective action on'a broad scale to upgrade these and othey similar-designs to clearly meet the plant's lice,nsed basic. As discussed earlier, we are also upgrading the design control process to prevent recurrence of these concerns.
In addition to these actions, TVA is also implementing a baseline and verification program in order to provide confidence that critical systems in
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. Mr. James M. Taylor June 2, 1986 the plant will operate safely when called upon. This program is an extensive effort and includes the following key elements.
o Verification of actual plant configuration, o
Reconciliation to engineering design documents, including supporting calculations and design criteria, o
Reconciliation to the FSAR (including licensing commitments),
o Performance of unreviewed safety question determinations (USQDs) for the system configuration, and o
Issuance of revised key plant drawings which are essential for operations.
Evaluation of the individual deficiencies and unresolved items identified in the inspection report is continuing in preparation for submittal of a detailed response to your office. However, due to the emphasis being placed on the a
programmatic aspects described above, completion of the assessment of these issues and TVA's subsequent submittal of our responses to the individual items is expected on or before June 30, 1986. This proposed submittal date was discussec between Jerry Wills of my staff and Bill Cline and Steve Weise (Region II) on May 30, 1986 and Bill Cline on June 2, 1986.
t Very truly yours, TENNESSEE VALLEY AUTHORITY 4
i R. L. Gridley, rector Nuclear Safety and Licensing cc:
U.S. Nuclear Regulatory Commission Region II ATTN:
Dr. J. Nelson Grace, Regional Administrator i
101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
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Director of Nuclear Reactor Regulation Attention:
Mr. B. Youngblood, Project Director l
PWR Project Directorate No. 4 Division of Pressurized Water Reactors (PWR)
Licensing A U.S. Nuclear Regulatory Commission Washington, D.C.
20555 1
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